q_id stringlengths 5 6 | title stringlengths 10 300 | selftext stringlengths 0 10.9k | document stringclasses 1
value | subreddit stringclasses 1
value | answers dict | title_urls dict | selftext_urls dict | answers_urls dict | title_body stringlengths 17 10.9k | embeddings list |
|---|---|---|---|---|---|---|---|---|---|---|
m41zn | How much of a "nutritional investment" is a spider's web? | I was thinking about this recently when I trashed a spiderweb that had been set up outside my doorway overnight. How big of a deal is it to the spider that his brand new web was ruined before it caught anything? Can he make 20 more like it ain't no thang, or is making a web so costly that they really can't afford to m... | askscience | {
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"I am not an expert on spiders, but the [Wikipedia page](_URL_0_) points out that the silk from which webs are made contains a large amount of protein, which is costly. Spiders apparently eat their old webs to r... | {
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"http://www.mendeley.com/research/western-black-widow-spiders-express-statedependent-webbuilding-strategies-tailored-presence-neig... | How much of a "nutritional investment" is a spider's web?
I was thinking about this recently when I trashed a spiderweb that had been set up outside my doorway overnight. How big of a deal is it to the spider that his brand new web was ruined before it caught anything? Can he make 20 more like it ain't no thang, or is ... | [
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jo5y9 | Another question about FTL | I understand FTL movement is impossible.
Having said that, do the equations used to determine particle interactions still work when you plug in a velocity greater than c, or does the math simply not work at all for some reason?
If the math is still consistent, can any predictions be made about a particle exceeding ... | askscience | {
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} | Another question about FTL
I understand FTL movement is impossible. Having said that, do the equations used to determine particle interactions still work when you plug in a velocity greater than c, or does the math simply not work at all for some reason? If the math is still consistent, can any predictions be made abou... | [
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5l5iwu | Are there any everyday macroscopic phenomena that are caused by the quantum behaviour of microscopic particles? | Or "can I see the effects of quantum stuff with my own eyes" | askscience | {
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"Interestingly, ferromagnetism is a quantum mechanical effect that we observe everyday in common bar magnets and refrigerator magnets. \n\nIt can be shown that classical mechanics f... | {
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"https://en.wikipedia.org/wiki/Colloidal_gold",
"http://www.samsung.com/global/tv/blog/Stained-Glass-and-Quantum-Dot-technology.html"
]
} | Are there any everyday macroscopic phenomena that are caused by the quantum behaviour of microscopic particles?
Or "can I see the effects of quantum stuff with my own eyes" | [
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oxxcd | Raw data is available from our AskScience Survey! Show us what you can do with it! | Have you been waiting to get your hands on a fresh data set? Well, here you go! The results of the AskScience Survey from the Fall of 2011 has been cleaned (but only a bit) to make it available for our AskScience readers and panelists!
[Google Spreadsheets link](_URL_1_) (It's read-only, but you can download the data)... | askscience | {
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"And as a bonus to all you beautiful people who checked out the comments...\n\n**The AskSci... | {
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} | {
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"http://blog.reddit.com/2011/09/who-in-world-is-reddit-results-are-in.html",
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} | Raw data is available from our AskScience Survey! Show us what you can do with it!
Have you been waiting to get your hands on a fresh data set? Well, here you go! The results of the AskScience Survey from the Fall of 2011 has been cleaned (but only a bit) to make it available for our AskScience readers and panelists! [... | [
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wxapd | I heard that a piece of the Sun's core (15,000,000° C) that is the size of a pinhead can kill a person from 90 miles away. Is this true? | Would a person feel any effects from the heat of the piece of the core (15,000,000° C) at 90 miles away? If so would it be enough to kill or at least hospitalize them?
I would appreciate it if someone would explain the answer (how can we tell what the relative heat would be that far away, etc.?) | askscience | {
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"At that temperature, it will release its energy very fast. A worst-case scenario is that all the energy is released at once, as in an atomic bomb. The density at the core of the sun is about 150 ... | {
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"http://www.wolframalpha.com/input/?i=%28stefan-boltzmann+constant%29*%284*pi*%281+mm%29^2%29+*+%2815000000+K%29^4+in+... | I heard that a piece of the Sun's core (15,000,000° C) that is the size of a pinhead can kill a person from 90 miles away. Is this true?
Would a person feel any effects from the heat of the piece of the core (15,000,000° C) at 90 miles away? If so would it be enough to kill or at least hospitalize them? I would appreci... | [
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1a3bm0 | Did Top Gear really find the source of the Nile and are they the first? | Reddit seem to be fairly avid watchers of Top Gear so I assume most people know that in their end of season special they attempted to find the 'true' source of the Nile in £1500 estate cars. They claimed that no one had truly found the source and that some explorers have claimed to have found it but that this was not t... | askscience | {
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} | Did Top Gear really find the source of the Nile and are they the first?
Reddit seem to be fairly avid watchers of Top Gear so I assume most people know that in their end of season special they attempted to find the 'true' source of the Nile in £1500 estate cars. They claimed that no one had truly found the source and t... | [
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146gg1 | This may be crude but I'm not trolling and I need to know to resolve an argument: Is the inside of a vagina considered skin? Where does the skin end and the internal organ start? | askscience | {
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} | {
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} | {
"url": [
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} | This may be crude but I'm not trolling and I need to know to resolve an argument: Is the inside of a vagina considered skin? Where does the skin end and the internal organ start?
| [
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v9x78 | At what size do we switch from making predictions through quantum physics to Newtonian laws? | I was reading a book which discussed the buckyballs double slit experiment. It used a brick wall and soccer balls as a metaphor. It mentioned that at some point a switch has to be made as the outcome with actual soccer balls differs from interference pattern witnessed with buckyballs but it did not specify. Have we det... | askscience | {
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"Molecules of all sizes obey quantum mechanics, but as the system gets larger quantum mechanics limit to classical mechanics. Since systems in daily life (such as soccer balls) are made up of a number of atoms ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://arxiv.org/abs/0902.0141",
"http://en.wikipedia.org/wiki/Macroscopic_quantum_phenomena"
]
} | At what size do we switch from making predictions through quantum physics to Newtonian laws?
I was reading a book which discussed the buckyballs double slit experiment. It used a brick wall and soccer balls as a metaphor. It mentioned that at some point a switch has to be made as the outcome with actual soccer balls di... | [
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2qxqhz | When the clock strikes midnight tonight, how close will the earth really be from the point it was at when it struck midnight last year? | askscience | {
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"Well, the [Earth's year/orbital period](_URL_1_) is about 365.25 days, and the time between the ball dropping last year and this year was only 365 days. So the Earth will be 0.25 d... | {
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"http://www.wolframalpha.com/input/?i=Earth+orbital+period"
]
} | When the clock strikes midnight tonight, how close will the earth really be from the point it was at when it struck midnight last year?
| [
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1m8iuy | Are there any medical consequences or curiosities to obese humans having more skin/higher surface area? | Can larger people regulate their body temperatures better or any other curious effects to their larger surface area? | askscience | {
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} | Are there any medical consequences or curiosities to obese humans having more skin/higher surface area?
Can larger people regulate their body temperatures better or any other curious effects to their larger surface area? | [
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xdzbw | How long does it take for ingested Carbs/Protein/Fat/Sugar etc to have an effect? | I've been watching my diet lately, and read plenty on how carbs are long term energy and fat is short term quick energy etc, but how long does it for those foodstuffs to actually become energy in my body, from mouth to use?
For example, if I eat a high carb food at 1pm, at what time will I feel the benefits of tho... | askscience | {
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"> carbs are long term energy and fat is short term quick energy\n\nActually, it's the complete opposite; fats and proteins are much more energy dense and are metabolised into energy more slowly than carbohydrates.",
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} | How long does it take for ingested Carbs/Protein/Fat/Sugar etc to have an effect?
I've been watching my diet lately, and read plenty on how carbs are long term energy and fat is short term quick energy etc, but how long does it for those foodstuffs to actually become energy in my body, from mouth to use? For example, i... | [
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3o9zzr | Ignorant first generation American here, why are industrial companies moving towards automation when we're already fighting each other for every job in the market, and how the hell is this supposed to help? | askscience | {
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"The purpose of business in a free market system is not to create jobs. It is to make a living for the founders and owners. Jobs are simply a byproduct of business - not the intent.\n\nI have a small online business that mad... | {
"url": []
} | {
"url": []
} | {
"url": [
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"http://www.entrepreneur.com/article/249868"
]
} | Ignorant first generation American here, why are industrial companies moving towards automation when we're already fighting each other for every job in the market, and how the hell is this supposed to help?
| [
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o18as | Is there any (credible) link between Aspartame and Multiple Sclerosis? | [Pursuant to this comment...](_URL_0_)
Are there any (credible) studies that show any link to Aspartame causing or exacerbating MS symptoms or lesions? I ask because all the googling I've done only turns up links of questionable quality (there are many people who wish to speak their mind about aspartame conspiracies a... | askscience | {
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"[No. I hope Snopes suffices to quell this myth, especially with the plethora of high quality links they provide.](_URL_0_)",
"[This](_URL_2_) review debunks the myth that aspartame is neurotoxic.\n\nBut, there are a few newer studies s... | {
"url": []
} | {
"url": [
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]
} | {
"url": [
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"http://www.springerlink.com/index/271G50U25780Q462.pdf",
"http://www.nature.com/ejcn/journal/vaop/ncurrent/full/ejcn20085a.html",
"http://en.wikipedia.org/wiki/Aspartame_controversy#Internet_hoax_conspiracy_theory",
"http://www.yout... | Is there any (credible) link between Aspartame and Multiple Sclerosis?
[Pursuant to this comment...](_URL_0_) Are there any (credible) studies that show any link to Aspartame causing or exacerbating MS symptoms or lesions? I ask because all the googling I've done only turns up links of questionable quality (there are m... | [
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wakg4 | Humans are at the top of the food pyramid but has any plant, animal, or other sort sort of organism been found to kill only humans through evolution? | Has any living organism developed a defense mechanism because of humans and geared only towards humans? | askscience | {
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],
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} | Humans are at the top of the food pyramid but has any plant, animal, or other sort sort of organism been found to kill only humans through evolution?
Has any living organism developed a defense mechanism because of humans and geared only towards humans? | [
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kwc36 | A friend claims that bread mold is entirely harmless to eat, is this a myth? | askscience | {
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"Your friend is wrong.\n\nMolds produce mycotoxins that can make you quite ill if consumed. This, of course, depends on the mold species in question... some molds are used to produce food product... | {
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} | {
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} | {
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"http://i.imgur.com/j0lwG.jpg",
"http://www.damninteresting.com/bad-rye-and-the-salem-witches/",
"http://www.botany.hawaii.edu/faculty/wong/bot135/lect12.htm"
]
} | A friend claims that bread mold is entirely harmless to eat, is this a myth?
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ppntn | CERN People! Is this real data? | _URL_0_
Look at the backdrop of the leftmost display in this picture, is that just fancy eyecandy or is that real data? Like a current snapshot of one of them bang-in-long'pipe-chambers? Either way it feeds my brain teh munchies! | askscience | {
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"text": [
"it's *more* fancy eyecandy than data. Granted we all love how it looks, and displays like this help us debug our softwar... | {
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} | {
"url": [
"http://news.bbcimg.co.uk/media/images/58492000/jpg/_58492170_57290145.jpg"
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"url": [
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"https://market.android.com/details?id=com.lhsee",
"http://i.imgur.com/2jkce.jpg"
]
} | CERN People! Is this real data?
_URL_0_ Look at the backdrop of the leftmost display in this picture, is that just fancy eyecandy or is that real data? Like a current snapshot of one of them bang-in-long'pipe-chambers? Either way it feeds my brain teh munchies! | [
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4jw9y9 | PLOS Science Wednesday: Hi Reddit, we are Florian Markowetz and James Breton. We published a paper in PLOS Medicine showing resistance to cancer treatment may be related to the heterogeneity in the tumor, which has implications for drug effectiveness – Ask Us Anything! | Hi Reddit,
My name is Florian Markowetz and I am a cancer researcher at the University of Cambridge in the [Cancer Research UK (CRUK)](_URL_3_) Cambridge Institute. My lab and I try to understand how genetic variability between and within patients leads to differences in cancer progression and outcome.
And my name is... | askscience | {
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"text": [
"Do common xenograft tumor studies accurately capture tumor heterogeneity when mice are injected with cultured cancer cells?\n\nHow can animal tumor models be improved so that treat... | {
"url": []
} | {
"url": [
"http://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1001789",
"http://scientificbsides.wordpress.com",
"http://www.markowetzlab.org",
"http://www.cambridgecancer.org.uk/",
"https://twitter.com/markowetzlab",
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]
} | {
"url": [
"http://dx.doi.org/10.1126/science.aad0501",
"http://dx.doi.org/10.1126/science.aaa1348",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4374162/",
"http://www.biochemsoctrans.org/content/ppbiost/38/2/374.full.pdf",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4281956/"
]
} | PLOS Science Wednesday: Hi Reddit, we are Florian Markowetz and James Breton. We published a paper in PLOS Medicine showing resistance to cancer treatment may be related to the heterogeneity in the tumor, which has implications for drug effectiveness – Ask Us Anything!
Hi Reddit, My name is Florian Markowetz and I am a... | [
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vco04 | If the human brain were a computer processor, what would the technical specifications be? (GHz, mainly) | askscience | {
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"I used to use the following example when I was giving lectures on computer ... | {
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} | If the human brain were a computer processor, what would the technical specifications be? (GHz, mainly)
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7sns41 | [Orbital Mechanics] What does burning radial out/in do? | Hi all,
I've begun playing around with Kerbal Space Program and there are some things that are unclear to me when it comes to orbital mechanics.
In orbital mechanics, speed and altitude are linked: a satellite or a ship orbits a body at a given altitude and a given speed (at least that's what I understand). If I incr... | askscience | {
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"Hi! Radial and antiradial thrust \"pivots\" orbits. Thrusting towards a planet would lower your altitude ahead of you, and raise it behind you. Thrusting away does the opposite. This doesn't change your orbital energy much, because the thr... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://en.wikipedia.org/wiki/Hohmann_transfer_orbit",
"https://en.wikipedia.org/wiki/Vis-viva_equation"
]
} | [Orbital Mechanics] What does burning radial out/in do?
Hi all, I've begun playing around with Kerbal Space Program and there are some things that are unclear to me when it comes to orbital mechanics. In orbital mechanics, speed and altitude are linked: a satellite or a ship orbits a body at a given altitude and a give... | [
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qaary | A girl on my fb posted this claim about microwaved water. I'm skeptical. ....Can anyone tell me the true science and/or lack there of in this article? | The article starts out sopunding liek a straight foward science project but as the article goes on the claims seem more and more unbelievable.
link to article: _URL_0_
text of the article: "Below is a Science fair project presented by a girl in a secondary school in Sussex.
In it she took filtered water and divided ... | askscience | {
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"This is completely unphysical nonsense. The \"test\" is either completely faked or done without proper controls.",
"There is absolutely no true science anywhere in that article... | {
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} | {
"url": [
"http://2012indyinfo.com/2012/02/11/microwave-test-an-eye-opener-employee-news/"
]
} | {
"url": [
"http://www.reddit.com/comments/pqoq9/can_microwave_heating_turn_food_toxic_or/"
]
} | A girl on my fb posted this claim about microwaved water. I'm skeptical. ....Can anyone tell me the true science and/or lack there of in this article?
The article starts out sopunding liek a straight foward science project but as the article goes on the claims seem more and more unbelievable. link to article: _URL_0_ t... | [
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kyiw2 | As a scientist, do you acknowledge that a process, or a series of processes created all of the matter and energy in the universe and do you think we could ever discover this process and create matter and energy as we see fit. | The big bang is not the answer I am looking for, that just seems to me like all the matter and energy was condensed to a single point, I am talking about the actual creation of matter, which is supposed to be impossible according to thermodynamics and other laws, but it all had to come from somewhere right?
| askscience | {
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"This question seems to be phrased oddly... are you trying to bring a theological discussion into AskScience, or looking for points to combat one?",
"Why? Conservation of energy is a consequen... | {
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} | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Dark_energy",
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"http://en.wikipedia.org/wiki/Cosmological_constant",
"http://en.wikipedia.org/wiki/Inflation_\\(cosmology\\)#Reheating",
"http://en.wikipedia.org/wiki/Inflation_(cosm... | As a scientist, do you acknowledge that a process, or a series of processes created all of the matter and energy in the universe and do you think we could ever discover this process and create matter and energy as we see fit.
The big bang is not the answer I am looking for, that just seems to me like all the matter and... | [
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35it46 | What are the key differences between boa constrictors, pythons, and anacondas? | askscience | {
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"url": []
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"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Pelvic_spur"
]
} | What are the key differences between boa constrictors, pythons, and anacondas?
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1g80fj | Does "burning in" headphones actually work, or is it a myth? | For those who don't know what burning in is:
Basically you play things like white noise (what you hear on those old TVs when you don't have a signal), pink noise (same but with more bass) and frequency sweeps. These are supposed to free up the speaker to allow more movement for a better sound.
Edit: I have [posted thi... | askscience | {
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"The suspension holding the speaker's diaphragm in place is made of some kind of manufactured flexible material. \n\nIt is totally conceivable that the mechanical properties of this diaphragm sus... | {
"url": []
} | {
"url": [
"http://www.reddit.com/r/audiophile/comments/1g93uf/does_burning_in_headphones_actually_work_or_is_it/"
]
} | {
"url": [
"http://www.innerfidelity.com/content/evidence-headphone-break"
]
} | Does "burning in" headphones actually work, or is it a myth?
For those who don't know what burning in is: Basically you play things like white noise (what you hear on those old TVs when you don't have a signal), pink noise (same but with more bass) and frequency sweeps. These are supposed to free up the speaker to allo... | [
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8jkbm1 | Does a heart need to beat? Would we be able to replace the heart with something that continuously moves blood around with no pulse (using a pump/compressor of sorts)? Would there be complications by making the flow constant rather than pulsed/beats? | askscience | {
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"https://ccforum.biomedcentral.com/articles/10.1186/s13054-016-1328-z",
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4464048/",
... | Does a heart need to beat? Would we be able to replace the heart with something that continuously moves blood around with no pulse (using a pump/compressor of sorts)? Would there be complications by making the flow constant rather than pulsed/beats?
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kp52o | Thoughts after the superluminal neutrino data presentation | Note to mods: if this information should be in the other thread, just delete this one, but I thought that a new thread was warranted due to the new information (the data was presented this morning), and the old thread is getting rather full.
The OPERA experiment presented their data today, and while I missed the main ... | askscience | {
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"According to the paper, the chance that this is statistical ... | {
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} | {
"url": [
"http://arxiv.org/abs/1109.4897",
"http://cdsweb.cern.ch/record/1384486?ln=en"
]
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"url": [
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"http://www.bbc.co.uk/news/science-environment-15017484",
"http://www.bbc.co.uk/news/science-environment-15034852",
"http://www.guardian.co.uk/science/blog/2011/sep/23/speed-light-broken-neutrinos?CMP=twt_gu",
"http://www.istruzione.it/... | Thoughts after the superluminal neutrino data presentation
Note to mods: if this information should be in the other thread, just delete this one, but I thought that a new thread was warranted due to the new information (the data was presented this morning), and the old thread is getting rather full. The OPERA experimen... | [
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9oxnqa | Some species don't breed in captivity. Why? What's keeping them? | askscience | {
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"text": [
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} | {
"url": []
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"url": [
"http://honeybee.drawwing.org/book/drone-congregation-area"
]
} | Some species don't breed in captivity. Why? What's keeping them?
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azoez6 | How do Gyroscopes in electronic devices work? | I've been trying to wrap my mind around how these things work, after playing on a switch for the first time and seeing that the gyro not only detects rotations and flips but also when you turn. So if I sit in a swivel chair and hold the switch in front of me it will detect the full spin of the chair.
I can't wrap my ... | askscience | {
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"text": [
"A combination of input data from a [Vibrating Structure Gyroscope](_URL_1_) and an [Accelerometer](_URL_0_) are used to compute orientation and precise movements in space.",
"A more interesting approach consists in a light gyroscope. It... | {
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} | {
"url": []
} | {
"url": [
"https://en.m.wikipedia.org/wiki/Accelerometer",
"https://en.m.wikipedia.org/wiki/Vibrating_structure_gyroscope",
"https://en.wikipedia.org/wiki/Microelectromechanical\\_systems",
"https://en.wikipedia.org/wiki/Microelectromechanical_systems",
"https://en.wikipedia.org/wiki/Ring\\_laser... | How do Gyroscopes in electronic devices work?
I've been trying to wrap my mind around how these things work, after playing on a switch for the first time and seeing that the gyro not only detects rotations and flips but also when you turn. So if I sit in a swivel chair and hold the switch in front of me it will detect ... | [
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3ou35w | Before the media blows up reporting on how we've found a Dyson Sphere what does the paper for KIC 8462852 actually say? | [deleted] | askscience | {
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"text": [
"Short version: this paper is s... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://sites.psu.edu/astrowright/",
"http://arxiv.org/abs/1509.03622v1",
"http://sites.psu.edu/astrowright/2015/10/15/kic-8462852wheres-the-flux/",
"http://sites.psu.edu/astrowright/wp-content/uploads/sites/9476/2015/10/8462852_all-1024x572.png"
]
} | Before the media blows up reporting on how we've found a Dyson Sphere what does the paper for KIC 8462852 actually say?
[deleted] | [
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11n1r3 | How is it possible my brain keeps track of time so well when I'm asleep that I wake up 7:59 on the dot, but I don't have this precision while I'm awake? | askscience | {
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"This happens to me as well but rarely enough for me to attribute it to [confirmation bias](_URL_0_).\n\nIf it really does happen as frequently as you say, I'd also b... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Confirmation_bias",
"http://www.psychologytoday.com/articles/199905/the-stirring-sound-stress"
]
} | How is it possible my brain keeps track of time so well when I'm asleep that I wake up 7:59 on the dot, but I don't have this precision while I'm awake?
| [
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19kqbf | How would one explain the apparent disparity between the size and speed of electrons, and the amount of work we can extract from their movement? | WTH, electricity? I don't really understand how something with such little mass, moving incredibly slow, can be used to drive a 2 ton car at 60mph. Maybe I'm wrong on a fundamental level, so I'll go over what I think I know:
I'm aware of the wave/particle duality, but for my purposes I'll imagine them as little ping-p... | askscience | {
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WTH, electricity? I don't really understand how something with such little mass, moving incredibly slow, can be used to drive a 2 ton car at 60mph. Maybe I'm wrong on a fundam... | [
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7fzxo8 | How do chemical reactions work on the quantum level? | I'm an undergrad student studying chemistry and biology where (especially in organic chemistry) we do a lot of "arrow pushing" (i.e. drawing arrows to signify where electrons travel during a chemical reaction). Earlier today I was watching a video in which Sean Carroll (physicist) goes on to explain how electrons actua... | askscience | {
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I'm an undergrad student studying chemistry and biology where (especially in organic chemistry) we do a lot of "arrow pushing" (i.e. drawing arrows to signify where electrons travel during a chemical reaction). Earlier today I was watching a video in which Sean Carro... | [
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8cc4h7 | Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart? | Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart?
For example, a proton and neutron would go together fine with the strong force, but a proton and another proton won't fit in together because of the electrostatic force.
I'm not an expert, but I feel this i... | askscience | {
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} | Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart?
Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart? For example, a proton and neutron would go together fine with the strong force, but a proton and... | [
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17yxg5 | Are there any gems or minerals or anything like which is fairly uncommon in the Universe, but common on Earth? | askscience | {
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uu88h | I'd like to get the facts straight on evolution. | I'd really like to understand what, specifically, is and is not true about this topic. My education on the subject was rather biased, so some of these questions will sound really stupid. Humor me.
* I've read that as you go back through history, eventually life had to come from nonliving substances. Spontaneous Genera... | askscience | {
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I'd really like to understand what, specifically, is and is not true about this topic. My education on the subject was rather biased, so some of these questions will sound really stupid. Humor me. * I've read that as you go back through history, eventually life had to co... | [
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1795uh | How far north or south do you have to go before time zones stop making sense? | Since time zones converge at the poles, I was curious what is done at research centres in the Arctic and Antarctic for time keeping. Do they have a time zone they use? Is there a point when time zones stop making sense and they just use UTC time? | askscience | {
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"http://www.bbc.co.uk/news/world-12849630",
... | How far north or south do you have to go before time zones stop making sense?
Since time zones converge at the poles, I was curious what is done at research centres in the Arctic and Antarctic for time keeping. Do they have a time zone they use? Is there a point when time zones stop making sense and they just use UTC t... | [
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9q3jkq | How do lakes deep underground maintain an ecosystem with no energy input from the Sun? | askscience | {
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8lfkjh | What things were predicted by math before their observation? | Dirac predicted antimatter. Mendeleev predicted gallium. Higgs predicted a boson. What are other examples of things whose existence was suggested before their discovery? | askscience | {
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"https://xkcd.com/54/",
"https:/en.m.wikipedia.org/wiki/Eratosthenes",
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Dirac predicted antimatter. Mendeleev predicted gallium. Higgs predicted a boson. What are other examples of things whose existence was suggested before their discovery? | [
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kwd4w | are human languages all equally expressive, and what can "expressive" mean in this context? | Hey guys,
I'm a Computer Scientist, so to me languages are all equally expressive as long as they have an alphabet and context-free grammar, because then you can express really whatever you want just by freely combining terms of the alphabet.
When it comes to expressiveness in terms of semantic richness, like in poetr... | askscience | {
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"It is widely accepted among linguists that all languages are equally expressive. This means that anything that can be expressed in one language *can* ... | {
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"url": [
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"http://www.reddit.com/r/linguistics/comments/j65tn/are_all_languages_really_equally_expressive/",
"https://secure.wikimedia.org/wikipedia/en/... | are human languages all equally expressive, and what can "expressive" mean in this context?
Hey guys, I'm a Computer Scientist, so to me languages are all equally expressive as long as they have an alphabet and context-free grammar, because then you can express really whatever you want just by freely combining terms of... | [
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oob88 | What exactly is an analog computer and how do they work? | I have been reading up on this trying to understand it but I still don't get how something like [this](_URL_0_) would work. | askscience | {
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"http://en.wikipedia.org/wiki/Cellular_automaton",
"http://en.wikipedia.org/wiki/Slide_rule"
... | What exactly is an analog computer and how do they work?
I have been reading up on this trying to understand it but I still don't get how something like [this](_URL_0_) would work. | [
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5jkcgg | Ask Anything Wednesday - Engineering, Mathematics, Computer Science | Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on **Engineering, Mathematics, Computer Science**
Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for ... | askscience | {
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"Hi, I'm a first year Mechanical Engineering undergraduate, and I was just wondering how much of a part creativity plays in a career within the field. Is this creativity something y... | {
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} | {
"url": [
"http://www.reddit.com/r/askscience/search?q=flair%3A%27meta%27&restrict_sr=on&sort=new&t=all",
"http://www.reddit.com/r/askscience/wiki/index#wiki_answering_askscience",
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"url": []
} | Ask Anything Wednesday - Engineering, Mathematics, Computer Science
Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on **Engineering, Mathematics, Computer Science** Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for... | [
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1vvljt | What happens to the individual protons in a patient inside an MRI machine when an RF pulse is applied? | This problem has had me stumped for a while now. I'll start by telling what I do understand.
When a patient is placed in an MRI machine, his protons align to the external magnetic field along the Z axis. This produces a "net vector" in the patient. These protons are precessing about the Z axis, most of them parallel a... | askscience | {
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"url": []
} | {
"url": [
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} | What happens to the individual protons in a patient inside an MRI machine when an RF pulse is applied?
This problem has had me stumped for a while now. I'll start by telling what I do understand. When a patient is placed in an MRI machine, his protons align to the external magnetic field along the Z axis. This produces... | [
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149848 | AskScience Panel of Scientists VII | **Calling all scientists!**
The previous thread is archived, but available for viewing [here](_URL_0_). If you are already on the panel - no worries - you'll stay! This thread is for **new** panelist recruitment!
**Please make a comment to this thread to join our panel of scientists. (click the reply button) **
The ... | askscience | {
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"url": [
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"http://www.reddit.com/r/askscience/comments/xlxup/is_breast_size_determined_more_by_genetic_factors/c5nnehl",
"http://www.reddit.com/r/askscience/comments/uauxs/do_the_ants_im_flicking_off_... | AskScience Panel of Scientists VII
**Calling all scientists!** The previous thread is archived, but available for viewing [here](_URL_0_). If you are already on the panel - no worries - you'll stay! This thread is for **new** panelist recruitment! **Please make a comment to this thread to join our panel of scientists. ... | [
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2ueuuk | Why can't you tie an "anti-knot"? | If you tie a knot on a string, why is it impossible to tie a second knot that undoes the first?
Edit: Thanks everyone for you insightful and informative responses! I think I understand the reasoning now, and have a good idea of where to look for more info on the subject. | askscience | {
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"http://en.wikipedia.org/wiki/Genus_%28mathematics%29#Orientable_surface",
"http://en.wikipedia.org/wiki/T... | Why can't you tie an "anti-knot"?
If you tie a knot on a string, why is it impossible to tie a second knot that undoes the first? Edit: Thanks everyone for you insightful and informative responses! I think I understand the reasoning now, and have a good idea of where to look for more info on the subject. | [
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4pa593 | AskScience AMA Series: I am /u/pengdrew, a physiologist that studies Penguins! I study the physiology of aging in wild penguin species and am here to any questions you have about penguins, aging and physiology/ecology! AMA! | Hi Reddit!
I am a PhD physiologist and ecologist studying the physiology of aging in wild penguins! I am currently in the second year of my PostDoc studying stress hormones, aging, and ecology in Spheniscus penguins. Specifically my work explores the relationship between stress hormones, telomeres and life-history dec... | askscience | {
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} | AskScience AMA Series: I am /u/pengdrew, a physiologist that studies Penguins! I study the physiology of aging in wild penguin species and am here to any questions you have about penguins, aging and physiology/ecology! AMA!
Hi Reddit! I am a PhD physiologist and ecologist studying the physiology of aging in wild pengui... | [
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qswq1 | Is there evidence that working out improves mental acuity in the young? | I've seen articles stating the mental health benefits of regular exercise among the middle-aged and elderly. For an 18-30 year old, is there evidence that an increase in physical activity leads to high academic performance (or other positive increases in brain activity)? If so, what is the biological basis? | askscience | {
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"http://www.amazon.com/Spark-Revolutionary-Science-Exercise-Brain/dp/0316113506",
"http://www.joh... | Is there evidence that working out improves mental acuity in the young?
I've seen articles stating the mental health benefits of regular exercise among the middle-aged and elderly. For an 18-30 year old, is there evidence that an increase in physical activity leads to high academic performance (or other positive increa... | [
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3d71qy | Why do scientists use logarithmic scales for some measurements and linear scales for others? | This came up in a discussion about the Richter scale and how a lot of people don't know that its a logarithmic scale.
(In their defense the vast majority of scales in our daily life are linear and there is nothing in the name to indicate the scale is logarithmic, or even what the base is. So, why use it?) | askscience | {
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} | Why do scientists use logarithmic scales for some measurements and linear scales for others?
This came up in a discussion about the Richter scale and how a lot of people don't know that its a logarithmic scale. (In their defense the vast majority of scales in our daily life are linear and there is nothing in the name t... | [
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76ne3p | AskScience AMA Series: European Southern Observatory announcement concerning groundbreaking observations. | ESO announces observations of an astronomical phenomenon that has never been witnessed before. The session will take place after ESO's press conference on **16 October 2017 at 16:00 CEST (10 AM ET)**, which can be watched live at [_URL_0_](_URL_2_).
-----
Summary
ESO's fleet of telescopes in Chile have detected the ... | askscience | {
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"ht... | AskScience AMA Series: European Southern Observatory announcement concerning groundbreaking observations.
ESO announces observations of an astronomical phenomenon that has never been witnessed before. The session will take place after ESO's press conference on **16 October 2017 at 16:00 CEST (10 AM ET)**, which can be ... | [
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8d5anh | When your body responds to changes in temperature by doing things like sweating or shivering, is it our minds’ perception of the temperature that causes this or does the temperature somehow directly do this? | Since that was probably a confusing title, here’s an example: if you were sitting in the snow and it was below freezing out, yet somehow in your mind you were completely convinced that it was warm out and that you weren’t cold at all, despite your internal temperature dropping, would you still start shivering? | askscience | {
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} | When your body responds to changes in temperature by doing things like sweating or shivering, is it our minds’ perception of the temperature that causes this or does the temperature somehow directly do this?
Since that was probably a confusing title, here’s an example: if you were sitting in the snow and it was below f... | [
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l4nm5 | Why are some human internal organs asymmetric, or located on one side of the body? | Doesn't nature strive for symmetry? Also, are there any animals that are naturally asymmetric externally? Like they look different on one side compared to another.
Thanks! | askscience | {
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} | Why are some human internal organs asymmetric, or located on one side of the body?
Doesn't nature strive for symmetry? Also, are there any animals that are naturally asymmetric externally? Like they look different on one side compared to another. Thanks! | [
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tl8o0 | Do we naturally think in Base 10 (with 10 numbers!) or is it a cultural influence? | * I understand that we have 10 fingers and it is therefore natural to think with 10 numbers but is this the only reason?
* Are there any other more fundamental, logical reasons as to why we use Base 10?
* How hard is it to think in Bases other than 10?
* Do we as humans find it harder to think in other Bases if we taug... | askscience | {
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* I understand that we have 10 fingers and it is therefore natural to think with 10 numbers but is this the only reason? * Are there any other more fundamental, logical reasons as to why we use Base 10? * How hard is it to think in Bases... | [
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stk2m | Should you throw out the entire box of strawberries if a few are covered in white fuzzy mold? | Ive heard that if ones moldy, theyre all moldy. You just cant see it yet. The visible fuzzy mold is merely the reproductive phase of the molds life cycle.
Is this true? Can I eat the unmoldy looking ones or not? | askscience | {
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"http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001672/",
"http://www.youtube.com/watch?v=ZmHkC2JM53c"
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} | Should you throw out the entire box of strawberries if a few are covered in white fuzzy mold?
Ive heard that if ones moldy, theyre all moldy. You just cant see it yet. The visible fuzzy mold is merely the reproductive phase of the molds life cycle. Is this true? Can I eat the unmoldy looking ones or not? | [
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48q18t | If I had a rope on earth and someone was at the sun with the other side of the rope then one person tugged on one side, would the other instantly feel it? | askscience | {
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9phhkl | I've been trying to teach myself a little about time, but as someone with little knowledge to base my understanding off of, I am having a hard time understanding why time passes differently if you are standing on a mountain than if you are sitting in a valley. Could you explain this concept to me? | askscience | {
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} | I've been trying to teach myself a little about time, but as someone with little knowledge to base my understanding off of, I am having a hard time understanding why time passes differently if you are standing on a mountain than if you are sitting in a valley. Could you explain this concept to me?
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1pro5a | How does Kalman filter work? | I seem to be missing an intuitive understanding of how it works and what it does. Why and when do we need to use it, as opposed to other, perhaps simpler filters? Can you provide an intuitive and easy to visualize example of when some other filter performs worse than the Kalman filter?
Apologies if this is a wrong su... | askscience | {
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"Hey I programmed an approximation of the kalman filter this summer for the use of filtering the data noise out of the data coming in from the Kinect Sensor. I say approximation because I only have 2 metrics of prediction and I made it a hyb... | {
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"https://www.cds.caltech.edu/~murray/wiki/images/b/b3/Stateestim.pdf",
"http://en.wikipedia.org/wiki/Motion_capture",
"http://www.cybersickness.org/what_is_sickness.asp",
"http://en.wikipedia.org/wiki/Kalman_filter"
]
} | How does Kalman filter work?
I seem to be missing an intuitive understanding of how it works and what it does. Why and when do we need to use it, as opposed to other, perhaps simpler filters? Can you provide an intuitive and easy to visualize example of when some other filter performs worse than the Kalman filter? Apol... | [
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1kprrx | Did ancient cultures experience inflation? | I understand that ancient cultures did not have economic systems exactly like ours, and that inflation is dependent on a lot of factors, but in general, did cultures like ancient Rome or feudal Japan experience inflation? These economies existed for thousands of years, so did inflation move more slowly because the econ... | askscience | {
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"/r/askhistorians might offer a more complete response, but the short answer is yes. One of the most famous examples is Mansa Musa, the Malian king who was so free with his wealth during his pilgr... | {
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"http://www.worldcat.org/oclc/426794447",
"http://en.wikipedia.org/wiki/Government_bond#Currency_and_inflation_risk",
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"http://en.wikipedia.org/wiki/Money_supply",
"http://en.wikipedia.org/wiki/Demand_deposit",
"http://en.wikipedia.org/wi... | Did ancient cultures experience inflation?
I understand that ancient cultures did not have economic systems exactly like ours, and that inflation is dependent on a lot of factors, but in general, did cultures like ancient Rome or feudal Japan experience inflation? These economies existed for thousands of years, so did ... | [
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lu71r | AskScience AMA Series- IAMA Medical Physicist working in a radiation treatment clinic | Hey /r/AskScience!
I am a physicist/engineer who switched over to the medical realm. If you have never heard of it, "Medical Physics" is the study of radiation as it applies to medical treatment. The largest sub-specialty is radiation oncology, or radiation treatment for cancer. The physicist is in charge of the te... | askscience | {
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"text": [
"Do you think directed therapy,... | {
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"url": [
"http://www.aapm.org/publicgeneral/default.asp"
]
} | {
"url": []
} | AskScience AMA Series- IAMA Medical Physicist working in a radiation treatment clinic
Hey /r/AskScience! I am a physicist/engineer who switched over to the medical realm. If you have never heard of it, "Medical Physics" is the study of radiation as it applies to medical treatment. The largest sub-specialty is radiation... | [
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j9q62 | What is the "best" design for a fan? | How and why are all of these [fan-blade designs](_URL_0_) different (beyond just aesthetics)?
Would someone like to give a basic explanation of the aerodynamics of fan blades, and electric motor efficiency? I'd like to understand why some applications use few blades, and others use many. How does blade width, leng... | askscience | {
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"url": []
} | {
"url": [
"http://imgur.com/9OTse"
]
} | {
"url": [
"http://www.scientificamerican.com/article.cfm?id=wind-turbine-fan-blades"
]
} | What is the "best" design for a fan?
How and why are all of these [fan-blade designs](_URL_0_) different (beyond just aesthetics)? Would someone like to give a basic explanation of the aerodynamics of fan blades, and electric motor efficiency? I'd like to understand why some applications use few blades, and others use ... | [
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5vb8va | If a stalactite or stalagmite were constantly exposed to air currents as they formed, would they grow in a slanted or curved direction? | askscience | {
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"In short, yes. Just recently attended a lecture given by a geotechnical engineer where this was mentioned. He showed us a picture of curved mini-stala... | {
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"url": [
"https://www.google.com/search?q=deflected+stalagmites&rlz=1C1GNAM_enUS685US685&oq=deflected+stalagmites&aqs=chrome..69i57.5854j0j3&sourceid=chrome&ie=UTF-8#safe=off&q=deflected+stalactites",
"http://www.goodearthgraphics.com/virtcave/deflected/deflect.html",
"http://mys... | If a stalactite or stalagmite were constantly exposed to air currents as they formed, would they grow in a slanted or curved direction?
| [
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1clv9v | What would happen if I fill up a box with deepsea water and take it to the surface? | Would it spill when I open it again at the surface, because the tension on the water would be released? Or would it even explode? | askscience | {
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"http://www.reddit.com/r/askscience/comments/1bzaj5/could_a_deepsea_fish_depth_below_4000m13000ft/c9bmjqb"
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} | What would happen if I fill up a box with deepsea water and take it to the surface?
Would it spill when I open it again at the surface, because the tension on the water would be released? Or would it even explode? | [
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5ml0gf | My six year old daughter asked after clapping her hands, "How does the sound come out?" | Can you help me explain it to her? | askscience | {
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"There's actually [a paper about that](_URL_0_). The sound is produced by the air escaping from between th... | {
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"https://www.acoustics.asn.au/journal/2013/2013_41_2_Fletcher_paper.pdf",
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} | My six year old daughter asked after clapping her hands, "How does the sound come out?"
Can you help me explain it to her? | [
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25kpdk | During a spacecraft launch and flight, for example a spaceship travelling to and docking at the ISS, how much of travel is calculated before hand and how much of the flight is reactionary? | E.g. do they know exactly where the ISS will be at the time of arrival or do they control the shuttle during the flight?
Just a question I recently started thinking about and have not found an answer of yet. Really curious to know! | askscience | {
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"What you're talking about sounds like open loop control. Flight software is almost always done with closed loop algorithms that use feedback to adapt to the environment.\n\nFor many vehicles, th... | {
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} | During a spacecraft launch and flight, for example a spaceship travelling to and docking at the ISS, how much of travel is calculated before hand and how much of the flight is reactionary?
E.g. do they know exactly where the ISS will be at the time of arrival or do they control the shuttle during the flight? Just a que... | [
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72za7r | Do humans have a vestigial tail wagging response? Is it detectable? | askscience | {
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"Not really, no. Animals wag their tails for a variety of reasons, but the happy=tail wagging response in dogs is unique to them. (Interestingly, foxes... | {
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} | {
"url": [
"https://en.wikipedia.org/wiki/Russian_Domesticated_Red_Fox#Genetic_experimentation",
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} | Do humans have a vestigial tail wagging response? Is it detectable?
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s5nnk | Can someone explain how a mass spectrometer works? | I think I have a basic understanding, but if someone could go in depth and explain it well, I'd be greatful as this has been bugging me for a while. | askscience | {
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"Awesome! I finally see a question I'm qualified to answer! :)\n\nA mass spectrometer is an instrument that ionises a molecule and then utilises the unique mass to charge ratio on that particular ion to move it in such a way that it can be d... | {
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} | {
"url": []
} | {
"url": []
} | Can someone explain how a mass spectrometer works?
I think I have a basic understanding, but if someone could go in depth and explain it well, I'd be greatful as this has been bugging me for a while. | [
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pgfrb | Why do 3D models of the universe look like an hourglass? | In programs like Celestia and Galaxy Explorer, the visible universe is hourglass shaped [like this.](_URL_0_)
Does the universe really look like this, or is it just a distorted vision of how we see it from earth, or what? | askscience | {
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"Interesting! [These](_URL_0_) are the only models I have ever se... | {
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"url": [
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"http://en.wikipedia.org/wiki/Sloan_Digital_Sky_Survey",
"http://www.sdss3.org/",
"http://www.astr.ua.ed... | Why do 3D models of the universe look like an hourglass?
In programs like Celestia and Galaxy Explorer, the visible universe is hourglass shaped [like this.](_URL_0_) Does the universe really look like this, or is it just a distorted vision of how we see it from earth, or what? | [
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b8hqa7 | AskScience AMA Series: Hi! We're Drs. Rebecca Schmidt from UC-Davis, and Cindy Lawler, from the National Institute of Environmental Health Sciences, part of NIH, and we work on how environmental factors can increase risk of Autism Spectrum Disorder. Ask us anything! | Today is the 12th annual World Autism Awareness Day. In honor of that, we're here to answer your questions about how our environment can influence risk of developing Autism Spectrum Disorder, or ASD, in our most vulnerable population -- our children.
[Autism](_URL_1_) encompasses a group of complex disorders involving... | askscience | {
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"https://www.niehs.nih.gov/health/topics/conditions/autism/index.cfm",
"https://www.ncbi.nlm.nih.gov/pubmed/?term=Association... | {
"url": [
"https://www.theguardian.com/science/blog/2015/jul/16/autism-doesnt-have-to-be-viewed-as-a-disability-or-disorder",
"https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Autism-Spectrum-Disorder-Fact-Sheet",
"https://www.cdc.gov/ncbddd/autism/hcp-dsm.html",
"https://j... | AskScience AMA Series: Hi! We're Drs. Rebecca Schmidt from UC-Davis, and Cindy Lawler, from the National Institute of Environmental Health Sciences, part of NIH, and we work on how environmental factors can increase risk of Autism Spectrum Disorder. Ask us anything!
Today is the 12th annual World Autism Awareness Day. ... | [
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3lpgka | Why do I get the conservation of energy when I solve the Euler-Lagrange equation? | askscience | {
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} | Why do I get the conservation of energy when I solve the Euler-Lagrange equation?
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7oyzqx | Do babies have reason, or is their behaviour dictated solely by their insticts? (since they haven’t learned having habits like kids and adults do) | askscience | {
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"url": []
} | {
"url": []
} | {
"url": [
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4215973/"
]
} | Do babies have reason, or is their behaviour dictated solely by their insticts? (since they haven’t learned having habits like kids and adults do)
| [
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n2rhk | What are some major everyday things that would not exist without NASA/The Space Race? | I always hear about how we received a lot of significant technological advances thanks to the space race, like computers, Tang and frozen dinners, I'd like to find some sources that explain exactly how and what technologies were developed through NASA that shape the modern world. | askscience | {
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"_URL_0_\n\nhere is a short list from NASA's website",
"Just thinking about some fields which the space race would have provided major advances in.\n\n* Robotics - this one is obvious robot arms etc were de... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.sti.nasa.gov/tto/apollo.htm"
]
} | What are some major everyday things that would not exist without NASA/The Space Race?
I always hear about how we received a lot of significant technological advances thanks to the space race, like computers, Tang and frozen dinners, I'd like to find some sources that explain exactly how and what technologies were devel... | [
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8ju2yb | I found these circles on a map which are weird formations; what made them? | I'll try to make this brief. I was looking on a local satellite map in my area, Thumb of Michigan, USA, and I found several circles, all in the area, if not the same section.
Some of it's state land, so I hiked out there to see what it was. There's no trails (new or old distinguishable) to any of these. They're a sect... | askscience | {
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"text": [
"Considering the location, I would suspect they are collapsed pingos from the era when the land was tundra at the end of the last glacial era. [Pingos](_URL_0_) are h... | {
"url": []
} | {
"url": [
"https://imgur.com/a/aRt3C0N",
"https://www.tuscolacounty.org/gis/"
]
} | {
"url": [
"https://en.wikipedia.org/wiki/Pingo",
"https://quod.lib.umich.edu/g/genpub/1265156.0001.001/34?page=root;size=100;view=text",
"https://en.wikipedia.org/wiki/Mounds_State_Park",
"https://babel.hathitrust.org/cgi/pt?id=mdp.39015015368973;view=1up;seq=7",
"https://imgur.com/a/qODkanR",
... | I found these circles on a map which are weird formations; what made them?
I'll try to make this brief. I was looking on a local satellite map in my area, Thumb of Michigan, USA, and I found several circles, all in the area, if not the same section. Some of it's state land, so I hiked out there to see what it was. Ther... | [
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3j4tjv | Is there any evidence of people time travelling? | If people in the future had perfected time travelling, wouldn't we be able to see them? Or would there possibly be some sort of "time travelling laws"? | askscience | {
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"This question is not as far fetched as you imagine. [Nemirof and Wilson](_URL_0_) looked for evidence of people googling certain news items like \"Pope Francis\" before they became news, to see if people from the future were ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://arxiv.org/abs/1312.7128",
"http://www.space.com/28000-physicist-kip-thorne-wildest-theories.html",
"https://www.youtube.com/watch?v=K6iMAjfz1k8"
]
} | Is there any evidence of people time travelling?
If people in the future had perfected time travelling, wouldn't we be able to see them? Or would there possibly be some sort of "time travelling laws"? | [
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wn6fe | Do humans actually contain everything a human body needs in an available form? | It's often joked referring to cannibalism that the human body contains literally everything a human body needs. But is that necessarily true?
I was thinking about polar explorers being forced to eat their dogs and losing their hair and getting ill. The livers of the dogs were poisonously high in vitamin A.
Would simi... | askscience | {
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"Half of the 20 major amino acids we require can't be produced by the human body and need to be incorporated through diet. As we don't store excess amino acids, in regards to your cannibal example, humans could not live exclus... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.biology.arizona.edu/biochemistry/problem_sets/aa/aa.html",
"http://inhumanexperiment.blogspot.com/2009/09/two-brave-men-who-ate-nothing-but-meat.html",
"http://en.wikipedia.org/wiki/Kuru_%28disease%29",
"http://en.wikipedia.org/wiki/Creutzfeldt-Jakob_disease"
]
} | Do humans actually contain everything a human body needs in an available form?
It's often joked referring to cannibalism that the human body contains literally everything a human body needs. But is that necessarily true? I was thinking about polar explorers being forced to eat their dogs and losing their hair and getti... | [
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14dr09 | Is there a theory for or a way classifying errors that occur only sometimes? | Within the little programming experience I've had it generally seems that either theres an error in my code and it will compile or it wont. I know that then there are run time errors or exceptions that can occur when a possibility isn't accounted for. Furthermore I know that in C you have to free up memory after its us... | askscience | {
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"Senior developer here.\n\nI have seen problems that appear infrequently (observed/reported in less than 1:100.000 cases) or that are extremely hard (or impossible) to reproduce in ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Integration_testing",
"http://en.wikipedia.org/wiki/Unit_testing",
"http://en.wikipedia.org/wiki/Soft_error",
"https://en.wikipedia.org/wiki/Whitespace_(programming_language)",
"https://en.wikipedia.org/wiki/Halting_problem"
]
} | Is there a theory for or a way classifying errors that occur only sometimes?
Within the little programming experience I've had it generally seems that either theres an error in my code and it will compile or it wont. I know that then there are run time errors or exceptions that can occur when a possibility isn't accoun... | [
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qspt7 | What are some of the consequences of human skull elongation? | Looking at [this image!](_URL_0_) it just looks so unnatural. Will the brain of a person with an elongated skull function normally, or will there be any specific negative consequences? | askscience | {
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"text": [
"Please everyone: If you make a top level comment, do not make jokes and make sure to cite your material. No more alien jokes please, they will just get deleted as so... | {
"url": []
} | {
"url": [
"http://upload.wikimedia.org/wikipedia/commons/1/11/ParacasSkullsIcaMuseum.jpg"
]
} | {
"url": [
"http://books.google.ca/books?id=k4WnC6U2YfoC&lpg=PP2&ots=LU3z5-tubN&dq=ortner%20putschar%201981%20&lr&pg=PP1#v=onepage&q&f=false",
"http://onlinelibrary.wiley.com/doi/10.1002/ajpa.1330790213/abstract",
"http://www.sciencedirect.com/science/article/pii/S0278416504000... | What are some of the consequences of human skull elongation?
Looking at [this image!](_URL_0_) it just looks so unnatural. Will the brain of a person with an elongated skull function normally, or will there be any specific negative consequences? | [
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1qpegr | How does digestion work when you're upside-down? If hung upside-down, would you eventually starve, even if you had food? | askscience | {
"a_id": [
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"text": [
"No, the smooth muscles in your esophagus will push the food down into your stomach independent of gravity. This is why you can take a gulp of water upside down.\n\nAs for the stomach and intestines, they also have layers of smooth muscle ca... | {
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} | How does digestion work when you're upside-down? If hung upside-down, would you eventually starve, even if you had food?
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2ce5oi | Did NASA really just say they performed an apparently successful test of a reactionless drive? | [This /r/technology thread](_URL_1_) and its comments suggest that NASA engineers tested some kind of reactionless thrust device with positive results. From the comments I was led to [this abstract on a NASA website](_URL_3_), but I can't penetrate the jargon well enough to get a clear idea of what it's saying, nor fi... | askscience | {
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"Effectively, yes. Everyone is still relatively skeptical, as is natural, but basically, three independent agencies, one of which is NASA, have tested one of two variants on this drive. The one China and Argentina (I believe) is the EmDrive,... | {
"url": []
} | {
"url": [
"http://www.pbs.org/wgbh/nova/next/space/improbable-thruster-seems-work-violating-known-laws-physics/",
"http://www.reddit.com/r/technology/comments/2ccbot/nasa_new_impossible_engine_works_could_change/",
"http://en.wikipedia.org/wiki/EmDrive",
"http://ntrs.nasa.gov/search.jsp?R=20140006052... | {
"url": [
"http://www.scribd.com/doc/235868930/Anomalous-Thrust-Production-from-an-RF-Test-Device-Measured-on-a-Low-Thrust-Torsion-Pendulum"
]
} | Did NASA really just say they performed an apparently successful test of a reactionless drive?
[This /r/technology thread](_URL_1_) and its comments suggest that NASA engineers tested some kind of reactionless thrust device with positive results. From the comments I was led to [this abstract on a NASA website](_URL_3_)... | [
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3uw7di | Are there any "ungraphable" functions? | Are there any functions that cannot, for whatever reason, be represented on a plot of y against x? | askscience | {
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"I'm not really sure what you mean by \"ungraphable\". The graph of a function y = f(x) is defined as the set of all points (x,y) in R^(2) such that y = f(x), and this set always exists. I'm guessing that by \"u... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://en.wikipedia.org/wiki/Weierstrass_function",
"https://en.wikipedia.org/wiki/Dirac_delta_function"
]
} | Are there any "ungraphable" functions?
Are there any functions that cannot, for whatever reason, be represented on a plot of y against x? | [
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80ls04 | Who keeps the time? | The standard time down to seconds and microseconds, where and who is responsible for keeping it? My assumptions are:
* This happens in England, since they are on the 00:00 timezone?
* All other clocks in the world clock are being referenced and synced to that tracking?
Who is the entity/organization that deals with t... | askscience | {
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"text": [
"International Atomic Time (TAI) is a major component in UTC (Coordinated Universal Time). TAI as a time scale is a weighted average of the time kept by over 400 atomic clocks in over 50 national laboratories worldwide. The clocks are compar... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://www.bipm.org/en/publications/mises-en-pratique/kilogram.html",
"https://www.bipm.org/en/bipm/tai/coordination-work/"
]
} | Who keeps the time?
The standard time down to seconds and microseconds, where and who is responsible for keeping it? My assumptions are: * This happens in England, since they are on the 00:00 timezone? * All other clocks in the world clock are being referenced and synced to that tracking? Who is the entity/organization... | [
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17v9mc | In theory, could all electricity in the US be generated at one point (e.g. massive solar farms in the NV deserts) and transmitted to the lower 48? Or is that wildly inefficient? | Cost prohibitive issues aside, as well as infrastructure redundancy / security issues... is it possible to transmit the electricity from NV all the way up to Maine and down to Florida? | askscience | {
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"text": [
"Theoretically possible, but wildly inefficient due the I^2 R losses you will incur transmitting it over such long distances.\n\nedit: formatting",
"Infrastructu... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://mediamatters.org/research/2013/01/24/myths-and-facts-about-solar-energy/192364",
"http://www.desertec.org",
"http://en.wikipedia.org/wiki/Wireless_power#Microwave_method",
"http://en.wikipedia.org/wiki/Distributed_generation",
"http://www.sspi.gatech.edu/wptshinohara.pdf",
"... | In theory, could all electricity in the US be generated at one point (e.g. massive solar farms in the NV deserts) and transmitted to the lower 48? Or is that wildly inefficient?
Cost prohibitive issues aside, as well as infrastructure redundancy / security issues... is it possible to transmit the electricity from NV al... | [
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p1x9o | When physicists refer to "nothing", what does that really mean? | Arguments have been made that Hawking's statements that the universe can create itself from nothing are self-contradictory, because it breaks causailty. My hunch is that those making such arguments are just not familiar with the more complex aspects of physics, but then again, neither am I. I've heard of particles "p... | askscience | {
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"text": [
"You're probably talking about Lawrence Krauss' lecture \"A Universe from Nothing.\"\n\nWhat he means is that if you count the total energy density of the universe as positive, and ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.reddit.com/r/askscience/comments/gypa6/where_do_virtual_particles_come_from/c1raxju",
"http://en.wikipedia.org/wiki/Zero-energy_Universe",
"http://en.wikipedia.org/wiki/Virtual_particle",
"http://www.firstthings.com/onthesquare/2010/09/much-ado-about-ldquonothingrdquo-stephen-ha... | When physicists refer to "nothing", what does that really mean?
Arguments have been made that Hawking's statements that the universe can create itself from nothing are self-contradictory, because it breaks causailty. My hunch is that those making such arguments are just not familiar with the more complex aspects of phy... | [
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3vipz9 | What is the swartszchild radius of a neutron? | If you scrunched the mass of Earth to about 1 inch you'd have a black hole.
Wolfram Alpha [tells me](_URL_1_) that the swartszchild radius of a neutron is about 2.5 * 10^-15 meters. Wikipedia [tells me](_URL_0_) that the radius of an atomic nucleus is about .875 * 10^−15 meters, but doesn't give me a radius for a neut... | askscience | {
"a_id": [
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"text": [
"Most likely, black holes smaller than a Planck mass (which is a few micrograms) are not possible/do not make sense. [Here](_URL_0_) is a detailed answer of mine to a similar question involving the electron.",
"There are a bunch of typos... | {
"url": []
} | {
"url": [
"https://en.wikipedia.org/wiki/Atomic_nucleus",
"http://www.wolframalpha.com/input/?i=%282*%281.48%C3%9710%E2%88%9227+*++1.6749+x+10%5E-27%29%29+%2F+%28299+792+458%29%5E2"
]
} | {
"url": [
"http://rantonels.github.io/capq/q/QG2.html",
"https://www.google.com/search?q=2*G*1GeV/c^4",
"https://www.google.com/search?q=sqrt%281%2F%282.3e17+kg%2Fm3%29*c^6*3%2F32%2FG^3%29+in+solar+masses",
"https://en.wikipedia.org/wiki/Hawking_radiation#Black_hole_evaporation",
"https://en.wiki... | What is the swartszchild radius of a neutron?
If you scrunched the mass of Earth to about 1 inch you'd have a black hole. Wolfram Alpha [tells me](_URL_1_) that the swartszchild radius of a neutron is about 2.5 * 10^-15 meters. Wikipedia [tells me](_URL_0_) that the radius of an atomic nucleus is about .875 * 10^−15 me... | [
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12nuyw | What is the highest deviation from the ordinary 24 hour day humans can healthily sustain? What effects would a significantly shorter/longer day have on a person? | I thread in /r/answers got me thinking. If the Mars 24 hour 40 minute day is something some scientists adapt to to better monitor the rover, what would be the limit to human's ability to adjust to a different day length, since we are adapted so strongly to function on 24 hour time?
Edit: Thank you everyone for your re... | askscience | {
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"text": [
"In the US navy on submarines, they operate on 18 hour days. Typically 1 normal 6 hour shif... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://kb.osu.edu/dspace/handle/1811/51774",
"http://en.wikipedia.org/wiki/Polyphasic_sleep",
"http://www.supermemo.com/articles/polyphasic.htm#References",
"http://www.cabinetmagazine.org/issues/30/foer.php",
"http://www.pnas.org/content/104/21/9081.full",
"http://www.plosone.org... | What is the highest deviation from the ordinary 24 hour day humans can healthily sustain? What effects would a significantly shorter/longer day have on a person?
I thread in /r/answers got me thinking. If the Mars 24 hour 40 minute day is something some scientists adapt to to better monitor the rover, what would be the... | [
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2umy84 | can you simplify a²+b²? | I know that you can use the binomial formula to simplify
a²-b² to (a-b)(a+b), but is there a formula to simplify a²+b²?
edit: thanks for all the responses | askscience | {
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"text": [
"\"Simplify\" may not be the best word here; \"factorise\" is probably better.",
"Math grad here (although haven't really used proper math in a while). In my mind... | {
"url": []
} | {
"url": []
} | {
"url": []
} | can you simplify a²+b²?
I know that you can use the binomial formula to simplify a²-b² to (a-b)(a+b), but is there a formula to simplify a²+b²? edit: thanks for all the responses | [
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l3o69 | Why is the chemical formula for Acetic Acid written with repeated elements, rather than subscripts denoting multiple elements? | Why is it written as [**CH**3**COOH**] rather than [**C**2**H**4**O**2] or something like that? Are there other compounds with chemical formulas like that? | askscience | {
"a_id": [
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"text": [
"Yeah, it's written that way to make it clear what the structure is. This form of writing formulas is common in organic chemistry just because it's more clear what exactly you're talking about. \n\nIn this case, acetic acid consists of a met... | {
"url": []
} | {
"url": []
} | {
"url": []
} | Why is the chemical formula for Acetic Acid written with repeated elements, rather than subscripts denoting multiple elements?
Why is it written as [**CH**3**COOH**] rather than [**C**2**H**4**O**2] or something like that? Are there other compounds with chemical formulas like that? | [
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4d4k98 | What did people do about hemroides before medicine? | Did they have a berries and herb cure or did the live out the rest of there days with an itchy bumhole? | askscience | {
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"If you were back in the good ol' Greek days... it wasn't pretty.\n\n > I recommend\nseven or eight small pieces of iron to be prepared, a fathom in size,\nin thickness like a thick specillum, and bent at the extremity, and\na... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://classics.mit.edu/Hippocrates/hemmor.mb.txt"
]
} | What did people do about hemroides before medicine?
Did they have a berries and herb cure or did the live out the rest of there days with an itchy bumhole? | [
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156ijs | Does the way a person sleeps(on back, side or chest) effect bone growth and/or bone shape? | askscience | {
"a_id": [
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],
"text": [
"[Yes, actually.](_URL_0_)\n\nThere is a cultural practice in Asia that favours supine-sleeping (versus prone-sleeping in North America) with measurable differences. Something called the Cranial Index (basically how wide your head is) is use... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.jpeds.com/article/S0022-3476%2804%2900955-2/fulltext"
]
} | Does the way a person sleeps(on back, side or chest) effect bone growth and/or bone shape?
| [
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1ngpvh | Do people burn the same amount of calories going up steps two at a time vs. going up one at a time? | I figure that it takes about the same amount of energy to go the same distance, but I'm curious which one would burn more calories, if, for example, you climbed a million steps both ways. | askscience | {
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"text": [
"Researchers at the University of Bath conducted a study investigating the energy expenditure of a 15m stair climbing task. Subjects were placed in a 1-step, or 2-step group. Investigators found that 2-step clim... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://tinyurl.com/c52w73u"
]
} | Do people burn the same amount of calories going up steps two at a time vs. going up one at a time?
I figure that it takes about the same amount of energy to go the same distance, but I'm curious which one would burn more calories, if, for example, you climbed a million steps both ways. | [
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j1fmu | Question on how a magnet is 'insulated' on one side | I'm sitting with my dad right now, showing him reddit for the first time, and was showing him askscience. This is one of my favorite subreddits, and as soon as I showed him he came up with a question to ask (it has me baffled).
So we have a pair of magnets from a hard-drive that my dad took apart, and we are perplexed... | askscience | {
"a_id": [
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],
"text": [
"Mu-metal! A nickel/iron/copper/molybdenum alloy that has a very high magnetic permeability. It doesn't absorb or block magnetic fields, but shunts them away.\n\nfrom Wikipedia: [_URL_0_](_URL_0_)",
"It's a (halbach array)[_URL_1_] basic... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Mu-metal",
"http://en.wikipedia.org/wiki/Halbach_array"
]
} | Question on how a magnet is 'insulated' on one side
I'm sitting with my dad right now, showing him reddit for the first time, and was showing him askscience. This is one of my favorite subreddits, and as soon as I showed him he came up with a question to ask (it has me baffled). So we have a pair of magnets from a hard... | [
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vp6vh | How accurate are this kind of pictures regarding smoker's lungs? Pic inside | Saw this in my Facebook feed and was wondering. I'm a nurse student and I don't really think this can be true.
Here is the picture:
_URL_0_
Left to right: Non smoker, regular smoker, heavy smoker (my liberal translation).
EDIT: Typo and translation | askscience | {
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"c56jg98",
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"text": [
"Ive dissected lungs like the medium damaged one, and worse again. Never as bad as the heavily damaged ones, but id believe it.",
"I've seen the same thing, but I have no reason to believe tha... | {
"url": []
} | {
"url": [
"http://i.imgur.com/E4JL4.jpg"
]
} | {
"url": [
"http://www.asbestostrip.co.uk/images/NORMAL_LUNG.jpg",
"http://en.wikipedia.org/wiki/Bronchiectasis",
"http://emedicine.medscape.com/article/297887-overview#showall"
]
} | How accurate are this kind of pictures regarding smoker's lungs? Pic inside
Saw this in my Facebook feed and was wondering. I'm a nurse student and I don't really think this can be true. Here is the picture: _URL_0_ Left to right: Non smoker, regular smoker, heavy smoker (my liberal translation). EDIT: Typo and transla... | [
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15in05 | Why can't I list every book I know, but I can tell you if I own it? | Example: I have huge bookshelves full of books. If you blind folded me, and went through asking me did I own book X, I could tell you with 95-100% accuracy. You could even fake books, or ask me about books I don't own, I'd be able to tell you yes or no. However, if you asked me to list all my books and write it on a pi... | askscience | {
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"text": [
"It's a phenomenon called priming. Without a stimulus related to a book (lik... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.reddit.com/r/askscience/comments/15in05/why_cant_i_list_every_book_i_know_but_i_can_tell/c7mx6jj",
"http://www-psych.stanford.edu/~ashas/Cognition%20Textbook/chapter5.pdf",
"http://en.wikipedia.org/wiki/Recognition_memory#Dual-process_versus_single-process_theories",
"http://www... | Why can't I list every book I know, but I can tell you if I own it?
Example: I have huge bookshelves full of books. If you blind folded me, and went through asking me did I own book X, I could tell you with 95-100% accuracy. You could even fake books, or ask me about books I don't own, I'd be able to tell you yes or no... | [
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11ahxe | Why is our perception of color cyclical, and is it also cyclical for bichromats and tetrachromats? | I'm a visual artist, and thus spend a lot of time pondering color perception.
What I'm wondering is... is there a physiological/neurological explanation for why we have a color wheel? Seeing as color is based on the wavelength of light, it seems like our perception of color should be linear, like our perception of sou... | askscience | {
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"text": [
"People are hitting on the right answer. It has to do with the way we perceive color, specifically, 3 cones and opponent-process theory. The entire theory fills a chapter of a textbook, but I would imagine there are resources you could fine ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.post-gazette.com/stories/news/health/some-women-may-see-100-million-colors-thanks-to-their-genes-450179/"
]
} | Why is our perception of color cyclical, and is it also cyclical for bichromats and tetrachromats?
I'm a visual artist, and thus spend a lot of time pondering color perception. What I'm wondering is... is there a physiological/neurological explanation for why we have a color wheel? Seeing as color is based on the wavel... | [
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a6tw9v | [Medicine] Why can’t mesothelioma be cured? | I realize my title might not make any sense. With the revelation that baby powder may have contained asbestos, why isn’t there a cure for mesothelioma? What makes mesothelioma so bad that it’s a death sentence? Is there any way to utilize stem cells or some other advance in medicine to combat the effects?
Also, why... | askscience | {
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"text": [
"Not a mesothelioma expert but I'll tell you what I know.\nAsbestos is a bugger of a material and it is highly friable (easily broken into microscopic fibres and dispersed through the air like dust). The asbesto... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://www.curemeso.org/",
"https://en.wikipedia.org/wiki/P16",
"https://en.wikipedia.org/wiki/The_Hallmarks_of_Cancer",
"https://en.wikipedia.org/wiki/The\\_Hallmarks\\_of\\_Cancer"
]
} | [Medicine] Why can’t mesothelioma be cured?
I realize my title might not make any sense. With the revelation that baby powder may have contained asbestos, why isn’t there a cure for mesothelioma? What makes mesothelioma so bad that it’s a death sentence? Is there any way to utilize stem cells or some other advance in m... | [
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1r9elk | (-1)^(1/2) is imaginary, but (-1)^(1/3) is real. What is (-1)^(1/2.5), and why? | askscience | {
"a_id": [
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"text": [
"Note that when dealing with roots and complex numbers, you actually get multiple results. For example, -1^(1/2) actually has two values:\n\n1. i\n2. -i\n\nSimilarly, -1^(1/3) has three values:\n\n1. -1\n2. cos(π/3) + i\\*sin(... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.wolframalpha.com/input/?i=%28-1%29%5Ex",
"http://en.wikipedia.org/wiki/Root_of_unity",
"http://en.wikipedia.org/wiki/Euler%27s_Identity"
]
} | (-1)^(1/2) is imaginary, but (-1)^(1/3) is real. What is (-1)^(1/2.5), and why?
| [
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7hg1sn | Which is stronger: the windows on planes, or the lowest windows on a cruise ship? | Sometimes windows on cruise ships are low enough that they can have waves crashing into them (or even be underwater? maybe?). I would think it's a matter of pressure but I don't know that much about physics. I would also think the cruise ship ones have to be stronger because a tiny leak of water sounds worse than a tin... | askscience | {
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"The windows on a ship will be significantly thicker (1 to 2 inches) and made from toughened glass than windows on a plane which are normally poly-carbonate and made of 2 or 3 layers with air betw... | {
"url": []
} | {
"url": []
} | {
"url": []
} | Which is stronger: the windows on planes, or the lowest windows on a cruise ship?
Sometimes windows on cruise ships are low enough that they can have waves crashing into them (or even be underwater? maybe?). I would think it's a matter of pressure but I don't know that much about physics. I would also think the cruise ... | [
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b2sgh9 | How exactly does nothing (or almost nothing) react with glassware? | I've been watching CodysLab and HTME on YouTube and seeing them put all those incredible reactive and dangerous into glass started wondering why/how it works? Are there other things that are as resistive to chemicals as glass is? | askscience | {
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"It really depends on the chemical in question, but plastics can hold lots of things and even some things that glass cannot (think of how many household chemicals are sold in plastic containers). Some metals are also great at holding things... | {
"url": []
} | {
"url": []
} | {
"url": []
} | How exactly does nothing (or almost nothing) react with glassware?
I've been watching CodysLab and HTME on YouTube and seeing them put all those incredible reactive and dangerous into glass started wondering why/how it works? Are there other things that are as resistive to chemicals as glass is? | [
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1i22pa | Could we take something as dense as stone and cut it thin enough to the point of being see through? | Hypothetically speaking could we take an object such as stone and cut it or flatten it to the point of being see through or translucent?
EDIT:Apparently despite earning a 98% on my literacy test I still don't remember the difference between opaque and translucent. | askscience | {
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"Yes. Actually, Yale University has a museum constructed out of marble that is thin enough to allow light through it, but not too thin as to allow too much light to damage the rare artifacts.",
"Geologists use [thin sections](_URL_0_) al... | {
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} | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Thin_section",
"https://www.uwgb.edu/dutchs/Petrology/Tsecplp.htm"
]
} | Could we take something as dense as stone and cut it thin enough to the point of being see through?
Hypothetically speaking could we take an object such as stone and cut it or flatten it to the point of being see through or translucent? EDIT:Apparently despite earning a 98% on my literacy test I still don't remember th... | [
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32f8wj | Why do artillery guns always shoot short at night? | At the end of a chapter in *Storm of Steel*, Ernst Jünger writes
> On the way back, Schultz and I gave each other a piece of our minds: I over his instructions to the machine-gunners, he over the artillery targeting. And yet I had done my work so scrupulously I couldn't understand what had gone wrong. **It wasn't ti... | askscience | {
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"text": [
"Arty officer here. They don't. Artillery rounds land where you put them. First, everyone u... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.globalsecurity.org/military/library/policy/army/fm/6-40/Ch1.htm"
]
} | Why do artillery guns always shoot short at night?
At the end of a chapter in *Storm of Steel*, Ernst Jünger writes > On the way back, Schultz and I gave each other a piece of our minds: I over his instructions to the machine-gunners, he over the artillery targeting. And yet I had done my work so scrupulously I couldn'... | [
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8m7ezj | What causes different materials to expand or contract at different rates? | Recently finished the thermodynamics unit in physics, and wanted to know what causes different materials to expand or contract at different rates? Does it have anything to do with the heat capacity, or are they two separate things?
\(I am aware that it is called the "coefficient of linear expansion" btw\) | askscience | {
"a_id": [
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"text": [
"Intermolecular bonding energy. Heat is atomic kinetic energy, right? Well, if a material is bonded to itself really strongly (tungsten), it will take a lot of energy (heat) to force them to spread out. If they are weak (plast... | {
"url": []
} | {
"url": []
} | {
"url": [
"https://imgur.com/a/ruoZIaO",
"https://pubs.acs.org/doi/abs/10.1021/acs.chemmater.5b00662",
"https://smartech.gatech.edu/handle/1853/58494",
"https://smartech.gatech.edu/handle/1853/53000",
"https://pubs.acs.org/doi/abs/10.1021/ja106711v"
]
} | What causes different materials to expand or contract at different rates?
Recently finished the thermodynamics unit in physics, and wanted to know what causes different materials to expand or contract at different rates? Does it have anything to do with the heat capacity, or are they two separate things? \(I am aware t... | [
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rlfid | Sleeping Only Two Hours A Day?(polyphasic sleep)
Is this bullshit? | Is it possible to sleep only two hours a day and still retain functionality beyond that of a caffienated dippy bird?
I’ve been reading Tim Ferriss’ newest book, The 4-Hour Body, and I was particularly interested in his chapters about sleep. I was interested in the second, “Becoming Uberman”. It describes a technique ... | askscience | {
"a_id": [
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"c46xnq7",
"c46ve9z"
],
"text": [
"There is no body of scientific literature that I know of that suggests a polyphasic sleep schedule would be sustainable and healthy in normal individuals. Last time someone asked, this is what I said (and this is not medical ... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.reddit.com/r/askscience/comments/mv2od/why_cant_we_sleep_at_will/c344s0f",
"http://polyphasicsleep.info/index.php?title=Dymaxion",
"http://www.mendeley.com/research/polyphasic-sleep-strategies-improve-prolonged-sustained-performance-field-study-99-sailors-4/",
"http://online.wsj... | Sleeping Only Two Hours A Day?(polyphasic sleep) Is this bullshit?
Is it possible to sleep only two hours a day and still retain functionality beyond that of a caffienated dippy bird? I’ve been reading Tim Ferriss’ newest book, The 4-Hour Body, and I was particularly interested in his chapters about sleep. I was intere... | [
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1hxvy8 | Does being an active and outdoorsy child influence the body's development in terms of body shape, muscles and so on? | askscience | {
"a_id": [
"caz3foy",
"caz2p79",
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],
"text": [
"Sorry to play devil's advocate, but this could be a case of reverse causality, i.e. the children that are genetically more prone to have bulky physiques and broad shoulders and big muscles tend to want to use them more and be more outdoorsy... | {
"url": []
} | {
"url": []
} | {
"url": [
"http://www.ncbi.nlm.nih.gov/pubmed/9383867"
]
} | Does being an active and outdoorsy child influence the body's development in terms of body shape, muscles and so on?
| [
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1vo5bb | May I please have your educated analysis of the recent 'donought rock' found on Mars by the Opportunity Rover? | [Here is the article](_URL_1_) from the Belfast Telegraph.
And [Ars Technica](_URL_3_)
And [_URL_2_](_URL_0_)
I am quite intrigued & am keen on hearing educated & knowledgeable analysis. | askscience | {
"a_id": [
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"ceuiiu3",
"ceu9tst",
"ceulm1e",
"ceuwb5a"
],
"text": [
"I posted about this in the /r/space thread fo... | {
"url": []
} | {
"url": [
"http://www.space.com/24330-mars-rover-mystery-rock-appears.html",
"http://www.belfasttelegraph.co.uk/news/world-news/nasa-says-doughnut-rock-on-mars-is-like-nothing-weve-ever-seen-before-29931351.html",
"Space.com",
"http://arstechnica.com/science/2014/01/donut-sized-rock-suddenly-appears-... | {
"url": [
"http://www.reddit.com/r/space/comments/1vmyi8/martian_jelly_donut_rock_is_very_high_in_sulphur/cetx1qz",
"http://www.reddit.com/r/space/comments/1vmyi8/martian_jelly_donut_rock_is_very_high_in_sulphur/ceu053r",
"http://i.imgur.com/zahIAcH.gif",
"http://theodoregray.com/periodictable/Elemen... | May I please have your educated analysis of the recent 'donought rock' found on Mars by the Opportunity Rover?
[Here is the article](_URL_1_) from the Belfast Telegraph. And [Ars Technica](_URL_3_) And [_URL_2_](_URL_0_) I am quite intrigued & am keen on hearing educated & knowledgeable analysis. | [
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