q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
value | subreddit stringclasses 3
values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
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1dwxv3 | When I see gray, what wavelengths am I seeing? | I saw an answer on Wikianswers which said that gray is all wavelengths being half-absorbed, but I don't see why this wouldn't just be white how something could half-absorb every wavelength. | askscience | http://www.reddit.com/r/askscience/comments/1dwxv3/when_i_see_gray_what_wavelengths_am_i_seeing/ | {
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"text": [
"Many times the color grey is generated by a mixture of compounds. Some which absorb and some which reflect. For instance if you mix white paint with black paint you will end up with a grey color because the mixture contains compounds which ref... | [] | [] | [
[]
] | |
3vfjz8 | how do people get hd clips from tv to the internet? | I know it's probably super simple, but I was curious as to how people are downloading/streaming TV and then making clips to put on YouTube or making GIFs.
Thank you! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3vfjz8/eli5_how_do_people_get_hd_clips_from_tv_to_the/ | {
"a_id": [
"cxn217l"
],
"score": [
2
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"text": [
"A PC with a \"Capture Card\" of one kind or another.\n\nHD material from a cable/satellite box gets fed into the computer, where it's \"captured\", and can then be edited and uploaded. It's not legal, but it is rather easy with modern software."
... | [] | [] | [
[]
] | |
4heahh | Are there any animals whose blood is not red? | When I googled this all I could find was sci-fi stuff | askscience | https://www.reddit.com/r/askscience/comments/4heahh/are_there_any_animals_whose_blood_is_not_red/ | {
"a_id": [
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"score": [
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"text": [
"Yes, but it's not particularly common. A common example is the [horseshoe crab](_URL_0_), which has hemocyanin in place of hemoglobin. Vertebrate blood's red color comes largely from hemoglobin, which is bright red when oxygenated and a darker ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Horseshoe_crab#Blood"
]
] | |
16ss7m | degrees of education | What is the difference between a bachelor's, master's, doctoral's, Ph.D., etc.? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/16ss7m/eli5_degrees_of_education/ | {
"a_id": [
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"text": [
"Associate's Degree: 2 years \n\nBachelor's Degree: 4 years \n\nMaster's Degree: Bachelor's + 2 years \n\nDoctoral/Ph.D: Bachelor's + 4-6 years. ",
"A bachelors degree is usually a four year degree at a university. While ... | [] | [] | [
[],
[]
] | |
23apur | why has easter turned into a time to celebrate finding chocolate/eggs from a bunny? | In all honesty i don't get how they relate | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23apur/eli5why_has_easter_turned_into_a_time_to/ | {
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"cgv51zv",
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"text": [
"You might ask why did Easter turned into a Christian holiday \"celebrating\" the torture and death of their god when it is actually (and originally) about the Spring Equinox and fertility.",
"They d... | [] | [] | [
[],
[],
[]
] | |
77oer8 | Why we're African slaves not more common in the uk? | Firstly, apologies if this question comes off as ignorant or offensive.
With England being a huge player in the transport of slaves from Africa to America and the Caribbean, why is there not more of a black minority with heritage going back to this period? Most African Americans seem to have slave ancestors; whereas m... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/77oer8/why_were_african_slaves_not_more_common_in_the_uk/ | {
"a_id": [
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"text": [
"There was a legal question regarding whether or not the state of enslavement could exist on British soil. The situation was ambiguous, and certain West Indian plantation owners did bring slaves back to Britain with them, as personal valets/maids ... | [] | [] | [
[]
] | |
6xqbbq | Does a satellite experience centrifugal force or centripetal force? | askscience | https://www.reddit.com/r/askscience/comments/6xqbbq/does_a_satellite_experience_centrifugal_force_or/ | {
"a_id": [
"dmhsxng"
],
"score": [
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"text": [
"It depends on your frame of reference. In an inertial frame stationary with respect to the Earth, the satellite is only subject to a centripetal force (gravity).\n\nIn a reference frame co-rotating with the satellite, the centripetal force is st... | [] | [] | [
[]
] | ||
7i45d5 | how was the internet made? like how did they discover coding, etc? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7i45d5/eli5_how_was_the_internet_made_like_how_did_they/ | {
"a_id": [
"dqvzwvk"
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"text": [
"Computers predate the internet by several decades, but the origins of the internet can be traced back to a US Military project in the 1960's called Arpanet. They wanted to see if they could get computers to communicate with each other. The first ... | [] | [] | [
[]
] | ||
14srt3 | Does boiling the same tap water multiple times change anything in it? | I make and drink a lot of tea. I have formed a habit of pouring out the previously boiled water and starting fresh.
My roommate thinks I'm crazy, but I think I can honestly taste a difference sometimes. Water the is boiled couple times seems to taste more "mineral"ly and heat it enough times, it will sometimes taste ... | askscience | http://www.reddit.com/r/askscience/comments/14srt3/does_boiling_the_same_tap_water_multiple_times/ | {
"a_id": [
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"score": [
3,
2
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"text": [
"Boiling water multiple times reduces the dissolved oxygen and any other dissolved gases, as the solubility for these decreases with temperature.\n\nNo new minerals are added or dissolved upon multiple boils - whatever minera... | [] | [] | [
[],
[]
] | |
p5yfy | Russian Drug Epidemic - Krokodil - Causes Necrosis. Is there any way that this can be healed? [Medicine] [NSFL] | I just read about this synthesized opioid which causes necrosis in the flesh. The following links are extremely graphic, word of caution. What you see is necrosis so severe it actually falls off exposing the bone. The youtube video shows a patient who has an entire area of his lower leg without bone or muscle. I know n... | askscience | http://www.reddit.com/r/askscience/comments/p5yfy/russian_drug_epidemic_krokodil_causes_necrosis_is/ | {
"a_id": [
"c3mt7l4"
],
"score": [
34
],
"text": [
"Let me clear my throat a little and thank you for the warnings.\n\nThese people have packed on every kind of cellular stress imaginable. They are throwing acids, aromatic reactive species, most likely heavy metals, and who knows what else, *dir... | [] | [
"http://www.youtube.com/watch?v=_Yfd_7jrnMk",
"http://io9.com/5859291/krokodil-russias-designer-drug-that-will-eat-your-flesh"
] | [
[
"http://facilities.fit.edu/documents/forms/MSDS/gasoline-all-grades-9950.pdf",
"http://www.hummelcroton.com/msdsp/redp_p.html",
"http://www.sciencelab.com/msds.php?msdsId=9927547",
"http://www.coopernatural.com/msds_hcl.pdf"
]
] | |
9zs4y8 | What did people in the 'Old West' name their pets? | Dogs and horses I know were much more than pets, they were useful tools out on the range. But I'm curious if humans have always named their dogs 'spot' or horses 'Thunder' | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9zs4y8/what_did_people_in_the_old_west_name_their_pets/ | {
"a_id": [
"eabls1v"
],
"score": [
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],
"text": [
"I'm honestly more curious about horse names "
]
} | [] | [] | [
[]
] | |
6bidsm | How did Italians preserve the tomatos needed for many of their dishes, prior to the invention of canning? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6bidsm/how_did_italians_preserve_the_tomatos_needed_for/ | {
"a_id": [
"dhnered"
],
"score": [
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"text": [
"Sorry, other poster is dead wrong, tomatoes were eaten fresh only rarely before the invention of commercial canning, getting down on fresh tomatoes is a pretty modern thing, your pre-canning tomato breeds would not make for tasty fresh eating, p... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3xubkl/comment/cy7z4al",
"https://www.reddit.com/r/AskHistorians/comments/2fcqkd/comment/ck8dirc"
]
] | ||
b4r8ll | why does the burn of putting your leg in hot water seem to come a second or so after it’s been pulled out? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b4r8ll/eli5_why_does_the_burn_of_putting_your_leg_in_hot/ | {
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"text": [
"So there’s ‘two’ nervous systems that usually work together. This is an example of where one takes over first.\n\n- CNS = Brain. It controls the actions you think about so it ta... | [] | [] | [
[],
[],
[],
[]
] | ||
7r7k49 | Why don’t everyday movements cause sub-concussive impacts? | I’m aware that the brain’s motion is dampened by the cerebrospinal fluid it floats in and by its tethering to the spinal cord and the meninges, but I have trouble seeing how this is sufficient to protect the brain from subtle damage just short of a concussion.
I tend to visualize a brain-sized egg (with strange holes... | askscience | https://www.reddit.com/r/askscience/comments/7r7k49/why_dont_everyday_movements_cause_subconcussive/ | {
"a_id": [
"dsv5rqc"
],
"score": [
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],
"text": [
"This is counterintuitive, but if the density of the egg in your example is roughly the same as the density of the fluid (so that it can float in it) then shaking the jar wouldn't make it bounce, it would keep floating roughly in the middle no mat... | [] | [] | [
[]
] | |
ar47hf | why are commercials so bad? why dont companies hire comedians or any other kind of professional to create commercials for them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ar47hf/eli5_why_are_commercials_so_bad_why_dont/ | {
"a_id": [
"egko5j6",
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"score": [
3,
3
],
"text": [
"Cost. Using big stars or producers is expensive, add on the cost of the time slot for the commercial and it cuts into company money.\n\nThe smaller the business, the lower quality production",
"Great minds think alike. A... | [] | [] | [
[],
[
"https://np.reddit.com/r/explainlikeimfive/comments/20513k/eli5_why_can_companies_with_massive_advertising/",
"https://np.reddit.com/r/explainlikeimfive/comments/35uaht/eli5why_does_local_media_especially_commercials/",
"https://np.reddit.com/r/explainlikeimfive/comments/40u7us/eli5why_are_there... | ||
3xs2x9 | What exactly are virtual particles? For example, a Weyl Fermion is apparently exciting for semiconductor applications, but what properties does it have that make it so? | askscience | https://www.reddit.com/r/askscience/comments/3xs2x9/what_exactly_are_virtual_particles_for_example_a/ | {
"a_id": [
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"text": [
"Virtual particles appear in perturbative field theory. When calculating observables in a field theory, it is almost always impossible to solve the problem exactly, so you develop a method to compute things approximately (this is called perturbat... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Quasiparticle",
"http://arxiv.org/abs/1301.0330",
"http://profmattstrassler.com/articles-and-posts/particle-physics-basics/virtual-particles-what-are-they/",
"http://physics.princeton.edu/zahidhasangroup/index.html"
]
] | ||
1ey8lm | why is the water contained in a source like soda any less beneficial? | It makes sense there are bad contents in some things but no sources ever give credit towards water intake to anything except actual water. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ey8lm/eli5_why_is_the_water_contained_in_a_source_like/ | {
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"text": [
"I cant really tell what you are asking, the title is confusing.",
"Soda is > 90% water (probably 98% or so). If you want to drink 8 glasses of water a day, 8 sodas would do it but the sugar and so... | [] | [] | [
[],
[],
[]
] | |
5b4l98 | how are some mods in gaming compatible to new game versions while other mods need to be updated? (eg. skyrim - compatible after patch but minecraft - mods need updates) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5b4l98/eli5_how_are_some_mods_in_gaming_compatible_to/ | {
"a_id": [
"d9lpez8",
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"text": [
"It depends on what those mods were doing to the game files, and what was changed in those files between versions.\n\nFor example, if you alter the \"running speed\" value in the movement script, it's no... | [] | [] | [
[],
[],
[]
] | ||
iq44d | Why do specific laws apply to the universe? | I've tried to find answers for this, but I am having a hard time discovering answers which are unrelated to a deity of some sort.
To specify my question, why do the "laws" which govern how any or all matter works in our universe exist and operate the way that it does? | askscience | http://www.reddit.com/r/askscience/comments/iq44d/why_do_specific_laws_apply_to_the_universe/ | {
"a_id": [
"c25r3be",
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"score": [
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"text": [
"Physicists are much better at answering 'how' than why. E.g: \"How do magnets work?\" \"How does gravity work?\" \n\nWhy is a much more philosophical question and is, in a sense, much less defined (and therefore less interes... | [] | [] | [
[],
[]
] | |
2hhckf | what exactly happens to your skin when it reacts to posion ivy? | I have a nice little patch of it on my arm and I've just been staring at it too long. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2hhckf/elif_what_exactly_happens_to_your_skin_when_it/ | {
"a_id": [
"ckso98f",
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"score": [
27,
6,
15
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"text": [
"It's called a type IV hypersensitivity reaction, more commonly known as an allergic reaction. This is a special type of allergic reaction that is not caused by histamine like most allergies are. This ... | [] | [] | [
[],
[],
[]
] | |
3wdqip | What makes some cancer "inoperable"? | what prevents a surgeon from just getting the thing out? | askscience | https://www.reddit.com/r/askscience/comments/3wdqip/what_makes_some_cancer_inoperable/ | {
"a_id": [
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"text": [
"Sometimes the cancer can occur in places where it would otherwise kill the patient. Like a tumor deep inside the brain might require a surgeon to do too muc... | [] | [] | [
[],
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[],
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] | |
5dqmd7 | resting membrane potential. why it hyper/hypopolarizes? | I'm taking an A & P class where we are currently learning about resting membrane potentials and I am completely lost with a quiz on Tuesday... I am being asked to explain what happens when there are increases or decreases in extracellular potassium concentrations and the same for sodium concentrations, but I don't c... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5dqmd7/eli5_resting_membrane_potential_why_it/ | {
"a_id": [
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"score": [
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"text": [
"The potassium and sodium ion concentrations are what cause the neuron to fire. Or actually they allow the action potential to propagate along the nerve.\n\nA nerve cell starts off polarized,meaning the outside of the membrane is positively charg... | [] | [] | [
[]
] | |
29gyw8 | How fast was the decline of civilisation in Europe (including Britain) after the fall of the Roman empire? | My childhood history books seem to suggest that there was almost an immediate reversal back to what civilisation (that may not be the right word) was like hundreds of years before the Romans, but I find that kind of hard to believe.
Also a follow-up question: did civilisation revert back to being significantly better ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/29gyw8/how_fast_was_the_decline_of_civilisation_in/ | {
"a_id": [
"ciktbqu"
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"score": [
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"text": [
"This is a difficult question to answer, due to the size of the empire and how different regions reacted differently to the decline of Roman authority, but generally I would say that though decline was visible in the West, it was a gradual one. I... | [] | [] | [
[]
] | |
379ulx | do people in other countries have the same view of the moon that i do if we look at it at the same time? | I live in the United States, and right now the time is 21:18. I just went outside and I could see about half of the moon. For people that live in Western Europe, it is about 03:18 right now, so still pretty dark. If someone over there went outside right now, would they have the same view of the moon that I do?
If... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/379ulx/eli5do_people_in_other_countries_have_the_same/ | {
"a_id": [
"crkwloh"
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"score": [
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"text": [
"Because the moon is tidally locked (the sun only shines on one side at any given time), only one side of the moon is illuminated. This is why we had to send spacecraft to the far side of the moon to see what it looked like.\n\nIn other countries,... | [] | [] | [
[]
] | |
5jlyyy | why is it now 4k and 8k instead of 2160p and 4320p | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5jlyyy/eli5_why_is_it_now_4k_and_8k_instead_of_2160p_and/ | {
"a_id": [
"dbh6knt"
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"score": [
6
],
"text": [
"Well, for one thing, it's easier to say, and easier to remember. \n\nBut I believe the real reason is that using the horizontal pixel count a more consistent number to use over vertical, since number of vertical pixels changes according to the as... | [] | [] | [
[]
] | |
1r578q | What would have Mary called her son? | I am certain it wouldn't have been Jesus as it doesn't sound very middle-eastern. Was is some Hebrew name? What about the Arabic name "Isa" which the Arabs use to refer to Jesus. Where did that come from? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1r578q/what_would_have_mary_called_her_son/ | {
"a_id": [
"cdjpbdl",
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"text": [
"Jesus is his name as passed through a number of transitions through other languages. The original Hebrew or Aramaic name would be something like Yoshua.\n\nSome modern groups make a big deal of calling Jesus by his \"real\" ... | [] | [] | [
[],
[]
] | |
2kgrn8 | why don't artists just release their entire album as singles to increase chart performance and song sales? | In the digital age of music, songs are a la carte anyway. I could buy a non-single without buying the full album. So why not release every song as a single? "Bad" and "Teenage Dream" released almost every single song as a single, and those two had some of the best chart performance in history. They dont need to make a ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2kgrn8/eli5_why_dont_artists_just_release_their_entire/ | {
"a_id": [
"cll5iot"
],
"score": [
9
],
"text": [
"A lot of artists produce songs which are meant to be listened together and in sequence as they enhance and compliment one another. If they were sold individually and listened to individually they would sound a lot worse because the artist would h... | [] | [] | [
[]
] | |
3v13ed | what is the physiology behind being gay, lesbian, bisexual, transgender? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3v13ed/eli5what_is_the_physiology_behind_being_gay/ | {
"a_id": [
"cxjdpxz"
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"text": [
"We're not really clear on it yet. There's some studies that suggest that transgendered people have brains that are physically closer to that of the sex they identify as, and some theories about hormone differences while in utero altering brain ch... | [] | [] | [
[]
] | ||
bevdr9 | How were the craters on the side of the moon facing earth created? | How come there are craters on the side of moon facing us if the moon is in a synchronous orbit (tidal locking) in relation to earth. The moon is only one quarter the size of the earth and 252,088 (405,696km) at apogee (furthest distance) so any meteorites and asteroids must have really lucky shots at the right angle of... | askscience | https://www.reddit.com/r/askscience/comments/bevdr9/how_were_the_craters_on_the_side_of_the_moon/ | {
"a_id": [
"elb0c3s"
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"score": [
12
],
"text": [
"[Here are Earth and Moon, to scale](_URL_0_)\n\nDoes that answer the question?"
]
} | [] | [] | [
[
"https://i.imgur.com/fx9wKIH.png"
]
] | |
3zo2hg | what type of data is obtained from underground nuclear tests? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3zo2hg/eli5_what_type_of_data_is_obtained_from/ | {
"a_id": [
"cynttoa"
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"text": [
"The main purpose of a test is find out whether the device can be safely armed and successfully detonated. The tests are performed underground for environmental and safety purposes, but can make taking precise measurements difficult. \n\n\nIf bur... | [] | [] | [
[]
] | ||
12tx8j | How dense does air get in the compressor of a jet engine? | How dense does air get in the compression and propulsion stage of a jet engine? Is there a way to conceptualize how incredibly dense this is in simple terms? | askscience | http://www.reddit.com/r/askscience/comments/12tx8j/how_dense_does_air_get_in_the_compressor_of_a_jet/ | {
"a_id": [
"c6yrhjk"
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"score": [
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"text": [
"For an isentropic (idealized) compressor, the density change is equal to the pressure change raised to the power of 1/gamma (1/1.4 for air). So a (high end) compressor ratio of 40:1 will give a density ratio of 14:1.\n\nAt sea level, you're looki... | [] | [] | [
[]
] | |
1vu3gq | Why did the Romans have so much trouble with the Germanic tribes? | Tacitus says
"Neither Samnite nor Carthaginian, neither Spain nor Gaul, nor even the Parthians have taught us more lessons. The German fighting for liberty has been a keener enemy than the absolutism of Arsaces."
What made the Germans so implacable?
| AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1vu3gq/why_did_the_romans_have_so_much_trouble_with_the/ | {
"a_id": [
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26,
2
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"text": [
"I wouldn't say I'm an expert on the Germanic tribes, but having read fairly extensively on Caesar, Varus and Germanicus, I can give you some background.\n\nThe Romans actually did a pretty good job of whipping German butt. ... | [] | [] | [
[],
[]
] | |
7nyl36 | How did mammoth hunting cultures harvest the meat? | Obviously a mammoth is a little too big to just pop on your shoulders and carry back to the village, were the tribes mostly nomadic and just set up camp around the kill or did they have some system in place for transporting the carcass for butchering? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7nyl36/how_did_mammoth_hunting_cultures_harvest_the_meat/ | {
"a_id": [
"ds5qfot"
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"text": [
"you should also try to ask this over at r/askanthropology but the current thinking is that the mammoth would be butchered where it fell. Bison (*Bison bison*), were much smaller and they tended to be butchered where they fell as well. There is a ... | [] | [] | [
[]
] | |
1ihefr | Do electrons really 'relolve' around the nucleus? | If an electron exists as an electron cloud, how can it 'revolve' around the nucleus? For example, let's say it is in the p-subshell. The subshell is dumbell shaped. The electron cannot really go in a circular orbit. Does the whole subshell 'rotate' to allow the electrons to revolve? Or do they not revolve at all? If so... | askscience | http://www.reddit.com/r/askscience/comments/1ihefr/do_electrons_really_relolve_around_the_nucleus/ | {
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"text": [
" > If an electron exists as an electron cloud, how can it 'revolve' around the nucleus?\n\nYou've just realized one of the gaping holes in the Bohr model.\n\n > Or do they not revolve at all?\n\nNot really. They just have certain probability dist... | [] | [] | [
[]
] | |
12ckou | How were hurricanes tracked in the 17th and 18th centuries? | Unrelated to the current hurricane we're experiencing, I happened to be reading the Wiki article for the [1780 hurricane season](_URL_0_). I understand that there's no way that every storm would be detected.
I'm most curious about how the meteorologists of the time followed the storms, especially over the ocean. T... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/12ckou/how_were_hurricanes_tracked_in_the_17th_and_18th/ | {
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"hurricanes were not 'tracked' in the 17th and 18th centuries. There was little understanding of cyclonic storms and no means of instantaneous communications. A track could be made well after the fact, but that was not 'track... | [] | [
"http://en.wikipedia.org/wiki/1780_Atlantic_hurricane_season"
] | [
[],
[]
] | |
mtk9k | The question that my professors/teachers have never been able to answer. What's the lowest temperature a flame can have. | askscience | http://www.reddit.com/r/askscience/comments/mtk9k/the_question_that_my_professorsteachers_have/ | {
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"It depends on what's burning. If you want to get into real technical territory, it also depends on the atmospheric pressure and the ... | [] | [] | [
[],
[],
[],
[],
[],
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] | ||
f3j589 | what happens after you burst a blood vessel? does the vessel itself reform or do you have a gap there forever? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f3j589/eli5_what_happens_after_you_burst_a_blood_vessel/ | {
"a_id": [
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"score": [
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"text": [
"It's called a bruise. The blood leaks out under your skin and makes a spill. The body patches up the vessel, or seals it off if it's too damaged. Then it cleans up the mess, that's why the bruise turns colors as the crashed blood cells get cle... | [] | [] | [
[]
] | ||
jrl87 | Do any non-human animals "remember" things in a way like humans, or only through conditioning? Can an animal "remember" another animal that harmed it? Can an animal plot revenge? | It seems that conditioning (non-innate behavior?) can happen for many (if not most?) animals, but humans can become angry, violent, spiteful, and plot revenge based on specific memory of events and based on abstract ideas. Do any other animals have anything approaching this capacity?
(Or, how do you distinguish betwee... | askscience | http://www.reddit.com/r/askscience/comments/jrl87/do_any_nonhuman_animals_remember_things_in_a_way/ | {
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"score": [
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"text": [
"Elephants can and do remember poaches years later and kill them. They will also stop at spots where elephants died. Their memory is ... | [] | [] | [
[],
[
"http://news.discovery.com/animals/angry-crows-memory-life-threatening-behavior-110628.html",
"http://en.wikipedia.org/wiki/Michael_\\(gorilla\\)"
],
[],
[],
[
"http://news.discovery.com/animals/angry-crows-memory-life-threatening-behavior-110628.html",
"http://en.wikipedia.org/wiki/... | |
34jj7k | How much radiation does a single banana give off? How many bananas would it take to kill someone and how long would that process take? | askscience | http://www.reddit.com/r/askscience/comments/34jj7k/how_much_radiation_does_a_single_banana_give_off/ | {
"a_id": [
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"text": [
"You basically couldn't kill someone by just piling bananas around them. The amount of radiation you need to get someone to kick the bucket is on the order of 2-5 Gy (joules per kg). Even using natural K metal (with a small %... | [] | [] | [
[],
[]
] | ||
5rd8i0 | how is youtube a sustainable business model? if view count remains constant but video storage costs continue to increase, wouldn't this lead to a permanent loss? | Let's assume that in 2020, YouTube maintains a daily view count of 500 million per day. However, they also keep old videos on the site that aren't generating views. Don't these "dead videos" eventually accumulate and overcome the profit margins with cost of storage? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5rd8i0/eli5_how_is_youtube_a_sustainable_business_model/ | {
"a_id": [
"dd6cep0",
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"text": [
"Storage costs are going down exponentially.\n\nEvery year the cost of storing 1 GB of data is half what it was the previous year.\n\nYouTube loses money every time someone uploads a long video that nob... | [] | [] | [
[],
[],
[]
] | |
3yon7h | does *absolutely everyone* on the sidelines of an nfl game have a reason to be there? | I understand there's a lot of people for checking on penalties and camera and audio stuff, but it seems like too many for just those. Looks like a lot of guys just standing around.. .. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3yon7h/eli5_does_absolutely_everyone_on_the_sidelines_of/ | {
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"text": [
"coaches (several), trainers, injured players in street cloths, water/towel boys, media (sound, cameras, on screen personality). police, cheer squad, security.\n \nIt seems the NFL... | [] | [] | [
[],
[],
[],
[]
] | |
69v43i | facebook scams. what do the accomplish by getting you to share a post? | ELI5: Caveat: I only started using Facebook on a regular basis about a year ago, and I use it primarily to steal memes.
I've seen a few varieties of these posts: "comment where you're from so I can see how far this has made it." "Please rate 1-10." And the ubiquitous "like, share, comment 'amen.'"
Is it just a v... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/69v43i/eli5_facebook_scams_what_do_the_accomplish_by/ | {
"a_id": [
"dh9lmeh"
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"score": [
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],
"text": [
"They are often designed to build up likes and followers then the owners of the page (usually located in a developing country not always though) will sell the page to scammers who can reach a giant audience (iPhone giveaways porn spam snake-oil we... | [] | [] | [
[]
] | |
opcav | how do web browsers work? | . | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/opcav/eli5_how_do_web_browsers_work/ | {
"a_id": [
"c3j0660"
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"score": [
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"text": [
"When you request _URL_0_, the server sends back a bunch of textual data. Plain text is boring to look at, so a simple markup language was created named html. The browsers job is to parse through the html and display it nicely. Some browsers di... | [] | [] | [
[
"reddit.com"
]
] | |
3rs1vu | When the United States annexed the former territory of Mexico (California, Utah, Nevada, Arizona, New Mexico, Texas), why were the Spanish names of cities such as Los Angeles and San Francisco retained? | I have always wondered what the reason was that the United States retained the Spanish names of the former Mexican territory of the Southwest. Could they have kept the names for the "romance" of living in a city or town with a Spanish name? Or could the names have been kept since there was a significant population of p... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3rs1vu/when_the_united_states_annexed_the_former/ | {
"a_id": [
"cwr1ind"
],
"score": [
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"text": [
"generally speaking, pre-existing towns or settlements weren't renamed, and san francisco is the exception. [according to the 1847 ordinance changing the name of the town,](_URL_0_) \"yerba buena\" was renamed \"san francisco\" to prevent confus... | [] | [] | [
[
"http://www.sfmuseum.net/hist/name.html",
"https://upload.wikimedia.org/wikipedia/commons/7/77/1846_Mitchell's_Map_of_Texas_Oregon_and_California_-_Geographicus_-_TXORCA-mitchell-1846.jpg",
"https://www.reddit.com/r/AskHistorians/comments/2xtspe/after_the_us_won_the_mexicanamerican_war_was/cp3ihiq",
... | |
51b93m | Books on U.S.-Native American wars | I'm looking for books about U.S.-Native American wars. The subject was glossed over or never mentioned in the history classes I have taken in the past. I'm interested whether they cover only one war or battle or are comprehensive. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/51b93m/books_on_usnative_american_wars/ | {
"a_id": [
"d7amsp3"
],
"score": [
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"text": [
"I quite enjoyed: Jill Lepore, The Name of War: King Philip’s War and the Origins of American Identity (New York: Vintage Books, 1999).\n\nIt covers one of the earlier conflicts to take place and explores some of the different perspectives and sou... | [] | [] | [
[]
] | |
cbml3f | municipal fiber internet. is it funded by the government or is funded by taxes? or do you just pay for it like you would for any other service (i.e. comcast, xfinity, etc...)? how does a town go about getting it (that is if they are in a state that doesn't ban it)? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cbml3f/eli5_municipal_fiber_internet_is_it_funded_by_the/ | {
"a_id": [
"etgmo2d"
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"score": [
3
],
"text": [
"As the name suggests Municipal Fiber Internet is provided by the municipality (local government). The organization and funding of this is up to the municipality as is the same for any municipal utility like water, sewage and roads. It is not unco... | [] | [] | [
[]
] | ||
1s4hw5 | why do salt water and fresh water bodies stay seperate | Also what is it called | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s4hw5/eli5_why_do_salt_water_and_fresh_water_bodies/ | {
"a_id": [
"cdttn5t",
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"score": [
2,
2
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"text": [
"Land for the most part. Lakes are fed by rainfall, and they occur most often in mountain valleys. Rain falls down the mountainsides making creeks and rivers that feed into the lake, and the water has no where else to go. ... | [] | [] | [
[],
[]
] | |
74c6hv | Im interested in theory of pre-historic advanced civilizations is there any reading material that you could recommend? | I know its not a commonly accepted theory im just asking to satisfy my curiosity. If this is not an acceptable post I understand if it is removed. Thanks in advance | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/74c6hv/im_interested_in_theory_of_prehistoric_advanced/ | {
"a_id": [
"dnxjcpr"
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"score": [
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"text": [
"Hey there!\n\nYou're right that it's not a commonly accepted theory, and for good reason. There's no evidence. Most arguments for it are based on \"We don't know anything about this era.. So it could be?\" This mentality hardly lends itself to an... | [] | [] | [
[]
] | |
6fqv6a | how powerful does a nuclear warhead have to be to destroy our planet? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6fqv6a/eli5_how_powerful_does_a_nuclear_warhead_have_to/ | {
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"text": [
"What do you mean by destroy the planet. If you mean death star type explosion with no planet left you would need a bomb around 100 Zettatons of tnt which is around a quadrillion ti... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/TNT_equivalent",
"https://en.wikipedia.org/wiki/Gravitational_binding_energy"
],
[]
] | ||
3ue2lq | In the Americas, why are Spanish-speaking countries so small and numerous, but there are two enormous English-speaking countries? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3ue2lq/in_the_americas_why_are_spanishspeaking_countries/ | {
"a_id": [
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"score": [
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"text": [
"After Simon Bolivar drove out the Spanish in South America, he was briefly president of much of Spanish-speaking South America. His vision was for it to be a united country. Other political factions felt differently.\n\nFurther north, Mexico and ... | [] | [] | [
[]
] | |
bzict9 | why are eggs almost universally sold in packs of 12? what made farmers agree to sell this way? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bzict9/eli5_why_are_eggs_almost_universally_sold_in/ | {
"a_id": [
"eqsmh0e",
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"text": [
"TLDR; Convenience, 1 shilling = 12 pennies, 1 egg = 1 penny. No need to make change.\n\nUnder a system that came to be known as English units, which was a combination of old Anglo-Saxon and Roman syst... | [] | [] | [
[],
[],
[]
] | ||
28wxyj | What's the advantage of having a long lifespan? | Creatures with short life spans such as bacteria or fruit flies can adapt to their environment faster, due to more generations in a given time period. So why have creatures (like humans and whales) evolved to have relatively long lifespans? Seeing as it takes much longer to be able to adapt to environmental changes. | askscience | http://www.reddit.com/r/askscience/comments/28wxyj/whats_the_advantage_of_having_a_long_lifespan/ | {
"a_id": [
"cifbr24"
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"score": [
8
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"text": [
"Human bodies, especially our brains, take a very long time to develop. We \"traded off\" our speed of evolution in order to get a more complex body/mind.\n\nPart of the reason that huge plants/animals have the longest life spans is so that they d... | [] | [] | [
[]
] | |
musm3 | Are animals aware of their own shadows and the shadows of other animals and objects? | Title says it all pretty much, how much awareness do animals show to shadows and have there been any tests on the subject.
Thank you! | askscience | http://www.reddit.com/r/askscience/comments/musm3/are_animals_aware_of_their_own_shadows_and_the/ | {
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"text": [
"I think the best comparison would be to a mirror. It answers the same basic question but is more explicit. Most animals cannot recognize themselves in a mirror although there are a... | [] | [] | [
[],
[
"http://www.pbase.com/ttorbert/image/83706931"
],
[],
[
"http://www.pbase.com/ttorbert/image/83706931"
]
] | |
rk1f3 | Other than living in a simulation, what other possible implications does this have? | This is an edited audio clip between Neil Degrasse Tyson and Professor Gates. (Couldn't find another source for the audio.) Gates speaks about nascent research regarding the discovery of "computer codes" hidden within superstring equations.
[**Youtube Link**](_URL_1_)
Can someone explain to me what this actually mea... | askscience | http://www.reddit.com/r/askscience/comments/rk1f3/other_than_living_in_a_simulation_what_other/ | {
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3,
3,
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"text": [
"It sounds like nonsense (edit: opinion revised below, the way the video presents things seems overexaggerated in its implications, but the mathematical similarity seems legitimate)... | [] | [
"http://arxiv.org/abs/0806.0051",
"http://www.youtube.com/watch?feature=player_detailpage&v=q1LCVknKUJ4#t=39s"
] | [
[],
[],
[
"http://being.publicradio.org/programs/2012/codes-for-reality/gates-symbolsofpower.shtml"
],
[
"http://www.fqxi.org/data/essay-contest-files/Whitworth_FQXiWhitworthEssa_1.pdf",
"http://www.simulation-argument.com/simulation.html",
"http://www.youtube.com/user/twcjr44",
"http://... | |
20ydad | What role did Persia and Persians play in Greek mythology? | I assume the arch-nemesis of the Greeks are addressed in some way in Greek mythology. Any Greek myths that relate to Persia or Persians directly?
To be clear, I'm curious about Persia's/Persians place in Greek mythology rather than just "through Zeus' help the brave Greeks crushed their enemies the Persians" mentions ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/20ydad/what_role_did_persia_and_persians_play_in_greek/ | {
"a_id": [
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3,
2,
2,
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"text": [
"There are no Greek Myths relating to the Persians or Persia directly. ",
"I'm not aware of any specific myths involving the Persians but there are several involving the near ea... | [] | [] | [
[],
[],
[],
[]
] | |
181wjl | Could someone explain the differences between and advantages/disadvantages of the different antiseptics? iodine vs alcohol vs peroxide, vs etc? | Like what is the advantage of iodine over alcohol? Alcohol dries stuff out, but iodine tincture has alcohol in it, so it doesn't have that as an advantage over it. Why not use iodine tincture for everything? are there ever advantages to using other antiseptics, like hydrogen peroxide, or any others? | askscience | http://www.reddit.com/r/askscience/comments/181wjl/could_someone_explain_the_differences_between_and/ | {
"a_id": [
"c8ayciq"
],
"score": [
3
],
"text": [
"[Here](_URL_0_) is a well-cited review of several antiseptics, including the ones you mentioned :)"
]
} | [] | [] | [
[
"http://www.medscape.com/viewarticle/456300"
]
] | |
3engh7 | how does "lottery wheeling" work? | I've read that it's a strategy used by lottery players to increase their odds of winning, but the Wikipedia article is confusingly saturated with information and I would love to have an ELI5 explanation that summarizes it well. Thank you in advance. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3engh7/eli5_how_does_lottery_wheeling_work/ | {
"a_id": [
"ctglro7"
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"score": [
3
],
"text": [
"The only part of the Wikipedia article you need to pay attention to says that wheeling does not change the expectation value of the ticket. That means that the probability of paying more for the ticket than you win is still nearly 100% and the mo... | [] | [] | [
[]
] | |
ptde8 | How can I have 80 billion direct ancestors going back to just the 13th Century? | askscience | http://www.reddit.com/r/askscience/comments/ptde8/how_can_i_have_80_billion_direct_ancestors_going/ | {
"a_id": [
"c3s2rs7",
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"score": [
2,
2
],
"text": [
"You were made by 2 people, who were made by 4 people, who were made by 8 people... etc. Not including siblings. ",
"xZOMBEHZx has the right idea. For each generation you go up from you, you add more and more people. Bu... | [] | [] | [
[],
[]
] | ||
5xq3yp | the difference between public and private sector labor unions | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5xq3yp/eli5_the_difference_between_public_and_private/ | {
"a_id": [
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"text": [
"A public sector labor union is a union comprised of government workers. A private sector labor union is a union comprised of private employees.\n\nThe biggest difference is that public sector labor unions largely negotiate with other government ... | [] | [] | [
[]
] | |
6mbv6o | given how hard it is to start and run a successful small business nowadays, how were so many immigrants able to come here with nothing, and and still start up businesses in the cities where they settled? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6mbv6o/eli5_given_how_hard_it_is_to_start_and_run_a/ | {
"a_id": [
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2,
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"text": [
"In the old days there were extremely few regulations, and they were not well enforced. If you wanted (for example) to buy some stuff and... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
5iwdjt | How long did it take to create marble sculptures? Weeks, months, or years? | Specifically, I refer to the sculptures created in the Renaissance and afterwards (but before industrialization). | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5iwdjt/how_long_did_it_take_to_create_marble_sculptures/ | {
"a_id": [
"dbbn5h3"
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"score": [
16
],
"text": [
"\"Months to years, it depends\". Many of the famous Renaissance sculptures took between one and three years. Almost three years for Michelangelo's David (september 13th 1501-early spring 1504), about two for Moses, and almost two for the Pietá (... | [] | [] | [
[
"http://sourcebooks.fordham.edu/basis/vasari/vasari26.htm"
]
] | |
2p5k2q | why do doctors flick syringes before injecting someone? is this just a thing they do in tv shows? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2p5k2q/eli5_why_do_doctors_flick_syringes_before/ | {
"a_id": [
"cmtk8tz",
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"text": [
"They are checking for air bubbles. Injecting a air bubble into a blood vessel can easily kill a person.",
"Its to remove any possible air bubbles. They don't just flick it, they take a little extr... | [] | [] | [
[],
[],
[]
] | ||
93qco5 | the difference between single phase and three phase power | I hear these terms thrown around a lot and just not sure what the difference is. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/93qco5/eli5_the_difference_between_single_phase_and/ | {
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15,
3,
16,
67
],
"text": [
"Both are forms of alternating current (AC)\n\nAlternating current cycles from +120V to -120V, 60 times per second (assuming you live somewhere that uses 1... | [] | [] | [
[],
[],
[],
[],
[]
] | |
6ihtn3 | can smelling something be unhealthy? like if there's a very bad smell, is there anything dangerous about the act of smelling it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ihtn3/eli5_can_smelling_something_be_unhealthy_like_if/ | {
"a_id": [
"dj6chtg",
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"score": [
2,
9
],
"text": [
"Unless the fumes contain chemicals that in their vapor form can damage breathing or affect the brain, no. Bad smells are not inherently more unhealthy than good smells. But if you're sniffing gasoline, which has a dangerous ... | [] | [] | [
[],
[]
] | ||
5uz4su | My great uncle enrolled in the Charlemagne Waffen SS Division, is there online ressources I could check to find out what happened to him ? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5uz4su/my_great_uncle_enrolled_in_the_charlemagne_waffen/ | {
"a_id": [
"ddxz7l5"
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"score": [
2
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"text": [
"Hi, hopefully someone can drop by to help with something more specific, but you might find these resources helpful : the sub has a wiki for finding military records [here](_URL_0_). You might also try x-posting to /r/genealogy for more tips. "
... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/militaryrecords#wiki_germany"
]
] | ||
37epxy | I kept hearing about significant infantry combat doctrine changes during the first world war. What were the main changes among western military from 1914 to 1918? | I'm hoping this could stay for the discussion on infantry combat doctrine only.
Specifically, what were the main organization changes? And why were they changed and what was the reason? Did any of the changes led to new infantry weapon design requirements, or even personal equipment. (How much ammo carried, grenade ca... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37epxy/i_kept_hearing_about_significant_infantry_combat/ | {
"a_id": [
"crm3z5r"
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"text": [
"There's a lot of talk on this and there's an idea here that many seem to struggle with greatly as it directly challenges this idea of \"trench warfare\" as a \"thing\". For each army it is different certainly so we'll speak for now only on the B... | [] | [] | [
[
"http://photos.imageevent.com/badgerdog/generalstorage/piclinks/Holding_It.jpg"
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ck0p3v | Feyman diagrams and gauge bosons? | Beta- Decay _URL_0_
Hey, so I just have a couple of "little" questions which have been bugging me while "learning" this stuff for fun. One of the questions I have is about the diagrams used for these quantum interactions, is the axis on the left there for time? And if so, why does the electron travel back in time (alo... | askscience | https://www.reddit.com/r/askscience/comments/ck0p3v/feyman_diagrams_and_gauge_bosons/ | {
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"Yes, the axis represents time. Feynman diagrams are not a literal depiction of what’s happening, so the fact that the positron arrow looks like it’s pointing backward in time doe... | [] | [
"https://imgur.com/gallery/MHJJ57N"
] | [
[],
[],
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tlna9 | Why is it that high current is dangerous but high voltage (to a certain limit) is not as dangerous? | Basically, why are we killed by like 0.01 amp, while we are able to tolerate voltage more easily?
EDIT: It's 0.01 amps, not 1 amp, thanks for the clarification. | askscience | http://www.reddit.com/r/askscience/comments/tlna9/why_is_it_that_high_current_is_dangerous_but_high/ | {
"a_id": [
"c4no4ok"
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"score": [
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"text": [
"We can be killed by 0.01A across the heart. An amp is quite a lot really. When you are electrocuted, what kills you is amperage across the heart. Enough amperage and it interferes with the heart's natural electrical signals, stopping it.\n \nVolt... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Ohm%27s_law",
"http://en.wikipedia.org/wiki/Electric_Shock"
]
] | |
djcbzb | Why do we not perceive the expansion of the universe? | If the expansion is essentially "all points in the universe moving away from each other", why do we not notice ourselves and all other objects "growing" larger?
Also, if the distances between all points are increasing, how do objects stay together? It would seem that the atoms in a stone would be moving away from eac... | askscience | https://www.reddit.com/r/askscience/comments/djcbzb/why_do_we_not_perceive_the_expansion_of_the/ | {
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"text": [
"We're not growing larger. Space inside our bodies is expanding, yes, but our cells aren't \"anchored\" to this space. They're anchored to each other. If you spread your arms wide... | [] | [] | [
[],
[],
[],
[]
] | |
8fpzn3 | does a house ever finish settling? | Sometimes a building will just creak and it's always been explained that the house is just settling. I take it to mean that the house is just slightly moving. Is this repositioning ever complete? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8fpzn3/eli5_does_a_house_ever_finish_settling/ | {
"a_id": [
"dy5ka2g"
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"score": [
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"text": [
"Short answer: no\n\nLong answer: I believe it is never settled because it's the materials of the house expanding due to the heat of the day and then contracting when it's cooling down at night"
]
} | [] | [] | [
[]
] | |
c3qsil | Did the Spartans suffer from demographic decline because their women were less willing to have children? | What is the veracity of this reddit comment _URL_0_ | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/c3qsil/did_the_spartans_suffer_from_demographic_decline/ | {
"a_id": [
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"The answer to your question is no, and the best way to describe the linked comment is \"horribly wrong\". Horrible because it blames Spartan women for a development that was wholly the result of laws and customs drawn up, enacted, and enforced b... | [] | [
"https://www.reddit.com/r/todayilearned/comments/c3ppfq/til_that_in_the_late_classical_era_of_greece/ersiu5x/"
] | [
[]
] | |
8bybpq | in the shell sort algorithm, why are the numbers 1,4,10,23,57,132,301,701,1750 used? they seem to be ambiguous and are really confusing me... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8bybpq/eli5_in_the_shell_sort_algorithm_why_are_the/ | {
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"text": [
"Shell sort partitions the data. The exact partition is not that important, but the properties of the partition (i.e. \"gap sequence\") do affect the runtime.\n\n\"Gonnet and Baeza-Yates observed that Shellsort makes the fewest comparisons on ave... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Shellsort"
]
] | ||
1rps17 | Why are British colonies in the Caribbean so homophobic? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1rps17/why_are_british_colonies_in_the_caribbean_so/ | {
"a_id": [
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"text": [
"I feel this is a loaded question as Montserrat, the Cayman Islands, the British Virgin Islands and the Turks and Caicos Islands all consider homosexual activity perfectly legal. So perhaps the question should more focus on ... | [] | [] | [
[],
[]
] | ||
119wo0 | Why is angular momentum one-sided even if a spinning object is symmetrical? | In other words, why is the right-hand rule that and not the left-hand rule? It seems very arbitrary and I'm having trouble grasping it. | askscience | http://www.reddit.com/r/askscience/comments/119wo0/why_is_angular_momentum_onesided_even_if_a/ | {
"a_id": [
"c6klfnc"
],
"score": [
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"text": [
"It is convention only, to allow scientists to talk to each other without having to describe which coordinate system they are using every time. Let me explain. \n\nThe direction of the angular momentum of an object doesn't mean anything by itself.... | [] | [] | [
[]
] | |
1uaew2 | How formative was Tolkien to the genre of high fantasy? | There is some debate on the subject, but for my purposes I'm using high fantasy to mean fantasy set, mostly or entirely, in another world. Under this definition Harry Potter counts because it mostly deals with a sphere outside of normal earthly existence, but few of E. Nesbit's books would.
What are some of the things... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1uaew2/how_formative_was_tolkien_to_the_genre_of_high/ | {
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"text": [
"Tolkien was in many ways the father of modern fantasy as we know it. He is responsible for many of the aspects of fantasy that are see as commonplace or cliche today namley, orc... | [] | [] | [
[],
[
"http://www.english.uga.edu/~jdmevans/Personal/JRRT1936.pdf",
"http://en.wikipedia.org/wiki/Sir_Orfeo",
"http://en.wikipedia.org/wiki/Alliterative_verse",
"http://public.callutheran.edu/~brint/Arts/Tolkien.pdf",
"http://en.wikipedia.org/wiki/Quenya",
"http://en.wikipedia.org/wiki/V%C... | |
3418ss | why does scanning take so long if photocopying or taking a photo of something is so quick? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3418ss/eli5_why_does_scanning_take_so_long_if/ | {
"a_id": [
"cqq9l2z",
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"score": [
17,
4,
15,
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"text": [
"Because you have a cheap scanner. Cheap scanners are slow. Expensive high end scanners are very fast.\n",
"Most photocopiers are optimized to scan very quickly, and do so at ... | [] | [] | [
[],
[],
[],
[]
] | ||
89ect0 | why do heroin users have to switch veins? what does the heroin do to “kill” the vein? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/89ect0/eli5_why_do_heroin_users_have_to_switch_veins/ | {
"a_id": [
"dwqd4wk",
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"score": [
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5
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"text": [
"It's not the heroin. It's poking the same spot with a needle over and over again without giving it enough time to heal. It can get more complicated where if you *do* give it time to heal after you've abused it too much it w... | [] | [] | [
[],
[]
] | ||
98x0om | how are things n% water? | How is the human body like 70%/80% IIRC water? How is a cucumber like 95% water? I can understand with liquids or wet things but how is the water content of a banana or piece of muscle or bone calculated? How do water molecules just seem to be incorporated into everything? Why water? What purpose does it serve? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/98x0om/eli5_how_are_things_n_water/ | {
"a_id": [
"e4jc1vf"
],
"score": [
4
],
"text": [
"Heat it until the water evaporates, check its mass before and after and calculate the percentage"
]
} | [] | [] | [
[]
] | |
3pisc4 | Why do shadows "kiss"? | When you move a shadow close to another there is a certain point at which another shadow forms between them. Why does this happen? | askscience | https://www.reddit.com/r/askscience/comments/3pisc4/why_do_shadows_kiss/ | {
"a_id": [
"cw7sbrj"
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"score": [
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"text": [
"This is because the sun is an \"extended\" light source, as opposed to a point light source. Because of this, there is an area called the [penumbra](_URL_1_), where the shadowing object creates a partial shadow. When two penumbras meet, it makes ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Shadow_blister_effect",
"https://en.wikipedia.org/wiki/Umbra,_penumbra_and_antumbra#Penumbra"
]
] | |
bx3tsu | how usa is one of top polluters in most sources but is consistently ranked relatively favorably (in the middle) for how polluted it is? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bx3tsu/eli5_how_usa_is_one_of_top_polluters_in_most/ | {
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"text": [
"A lot of it is just how big the US is and how much the population and industrial centers are spread out.\n\nIf I have a country that is 100 square miles and p... | [] | [] | [
[],
[],
[],
[
"https://aqicn.org/map/world/"
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[]
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7st35i | the waco siege. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7st35i/eli5_the_waco_siege/ | {
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7,
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"text": [
"a ups driver was delivering packages to the compound and one broke open showing weapons, inert grenades and black powder. UPS reported this to the sheriff who contacted the ATF. ... | [] | [] | [
[],
[],
[],
[]
] | ||
2ge2hd | Napoleonic Era and Uniforms (Nit-Picky Questions) | So I'm a fan of the Napoleonic Era, and I would say I know just enough about it but not the detailed specifics. So I have some few nitpicky questions I was hopijg you guys could help answer.
Austria and Napoleon: From what I know, Napoleon had a large amount of hate for Austrians saying that there empire should be br... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ge2hd/napoleonic_era_and_uniforms_nitpicky_questions/ | {
"a_id": [
"cki86tb"
],
"score": [
3
],
"text": [
"So, there's a million questions. It would be beneficial if you reworded your question for a single question and ask a few over a few days."
]
} | [] | [] | [
[]
] | |
3mhzyy | what is the evolutionary benefit to a species, such as the praying mantis, to have the female kill the male after copulation? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mhzyy/eli5_what_is_the_evolutionary_benefit_to_a/ | {
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"text": [
"By eating the male, the female gains a lot of nutrients, which will enable her to have healthier and stronger offspring. In this way, there is a higher chance that the genes of ... | [] | [] | [
[],
[],
[],
[]
] | ||
417fmz | if someone is on death row and has a medical issue causing them the die sooner than their execution date, why would they be given medical help? | Morally I kind of understand, but financially and logically it does not make sense to me. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/417fmz/eli5_if_someone_is_on_death_row_and_has_a_medical/ | {
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"text": [
"Up until the moment the executioner turns the key, the state must provide care for their convicted felons. The logic behind this is that up until that last... | [] | [] | [
[],
[],
[],
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3ueemv | it's common knowledge that exercising regularly and pushing yourself is good for your health and heart, but how does that logic work that the harder you work your heart, the healthier it becomes, instead of wearing it out? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ueemv/eli5_its_common_knowledge_that_exercising/ | {
"a_id": [
"cxe5bg7"
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"score": [
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],
"text": [
"The human body is a fascinating thing. It has been developed to be able to adapt to different lifestyles. When working out, you are essentially telling your body that for your lifestyle, you require stronger muscles. The body has learned to oblig... | [] | [] | [
[]
] | ||
r6pdy | How much variety is there between single celled organisms? Would two of my red blood cells be completely identical down to the smallest measure? | askscience | http://www.reddit.com/r/askscience/comments/r6pdy/how_much_variety_is_there_between_single_celled/ | {
"a_id": [
"c43bvbm"
],
"score": [
2
],
"text": [
"Two different questions really. Red blood cells aren't organisms. 1) Vast. 2) Potentially, but unlikely"
]
} | [] | [] | [
[]
] | ||
51n32s | Sickle Cell Anemia and UVR / Melanin Evolution Correlation? | I'm currently in a discussion with my family regarding the fact that darker skin tones developed due to UVR exposure and equator distance.
However, a question has been posed: those with darker skin tones are susceptible to the disease SCA (Sickle Cell Anemia). I'm curious as to whether or not there is a link between t... | askscience | https://www.reddit.com/r/askscience/comments/51n32s/sickle_cell_anemia_and_uvr_melanin_evolution/ | {
"a_id": [
"d7els6b"
],
"score": [
4
],
"text": [
"It is because the sickle cell hemoglobin gene when it is heterozygous (meaning only one copy of one of your chromosomes and the other chromosome has a normal hemoglobin) protects against malaria. Since malaria is much more prevalent in tropical l... | [] | [] | [
[]
] | |
2r7e95 | why is it that when my battery dies on my iphone it takes 10 minutes to turn back on while connected to a charger? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2r7e95/eli5why_is_it_that_when_my_battery_dies_on_my/ | {
"a_id": [
"cnd4k2j"
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"score": [
7
],
"text": [
"Apple makes sure that the phone is charged to a minimum % (3%-5%?) before it turns on, to make sure it doesn't die again when you unplug it."
]
} | [] | [] | [
[]
] | ||
1z7ra7 | What is happening during the onset, peak and duration of a local anesthetic? | Does the location of application negate the effects?
| askscience | http://www.reddit.com/r/askscience/comments/1z7ra7/what_is_happening_during_the_onset_peak_and/ | {
"a_id": [
"cfrvg12"
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"score": [
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"text": [
"Local anesthetics, like lidocaine, work by stabilizing the membrane of cells. What this means is that they reversibly decrease the rate of depolarization and repolarization of excitable membranes. One such type of membrane is the cell membrane of... | [] | [] | [
[]
] | |
6g4uhs | why does ukip have so many meps as opposed to other government positions? | They have 20 MEPs but only 3 members of the House of Lords or House of Commons. How does that happen? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6g4uhs/eli5_why_does_ukip_have_so_many_meps_as_opposed/ | {
"a_id": [
"dinhreq",
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"score": [
4,
2
],
"text": [
"UKIP supporters really, really, *really* hate the EU.\n\nMost everyone else just doesn't care about MEPs.\n\nSo UKIP voters are more energized in European elections than the general public.",
"The First Past The Post sys... | [] | [] | [
[],
[]
] | |
92yvvv | - why is, what seems like rape so prevalent in the animal kingdom? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/92yvvv/eli5_why_is_what_seems_like_rape_so_prevalent_in/ | {
"a_id": [
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"score": [
9,
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"text": [
"Because most animals don't have morals. Humanity has gotten to a point of intelligence and society that we don't need to allow ourselves to just procreate willy-nilly. \n\nCats, do... | [] | [] | [
[],
[],
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3rd7sv | why don't vending machines keep their change topped up from the money people put in? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3rd7sv/eli5_why_dont_vending_machines_keep_their_change/ | {
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"score": [
113,
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"text": [
"Filtering a coin box and setting it up so that it can provide change is possible, but requires a more expensive... | [] | [] | [
[],
[],
[
"http://www.coinco.com/index.php/products/coinchangers/coinpro3"
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[],
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2u25b2 | What did ancient teenagers do for fun? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2u25b2/what_did_ancient_teenagers_do_for_fun/ | {
"a_id": [
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"You mean a 'really' ancient civilisation such as the Greeks or the Egyptians, or will a more recent example do?\n\nRoman teenagers from the 17th/18th/early-19th centuries grew up in the street and the society they lived in was rife with violence.... | [] | [] | [
[
"https://zanzathedog.files.wordpress.com/2012/12/giudeo-nella-botte.jpg?w=320"
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] | ||
9cje19 | why do egg-whites foam when we whisk them and do not when there is just a very tiny amount of egg yolk in it? | Why do egg-whites foam when we whisk them?
I notice when there is just a drop of egg-yolk in the egg-white bowl then no matter how long or how hard we whisk the egg-white will never foam. What does the egg-yolk do? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9cje19/eli5_why_do_eggwhites_foam_when_we_whisk_them_and/ | {
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27,
8,
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83,
2
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"text": [
"The foam form the whites is formed by proteins from the protein-rich egg-white. The yolk contains fats that destroy the protein foa... | [] | [] | [
[],
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[],
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[]
] | |
3vk6hr | how do we not run out of telephone numbers? | I understand that they recycle telephone numbers from previously subscribed customers, but a standard 10 digit number could only have 3,628,800 combinations right? How have we not reached the quota? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3vk6hr/eli5_how_do_we_not_run_out_of_telephone_numbers/ | {
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2,
4,
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"text": [
"10 000 000 000! There are ten billion possible numbers you can create with 10 digits plus all the recycled ones and youre done. Its true however that we are soon to be running out ... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/North_American_Numbering_Plan"
],
[]
] | |
14gmpx | What memorials/monuments, if any, has the USA donated to other countries that is not about the US in anyway. | This question occured to me from the Russian 9/11 memorial post ([Thread in question here](_URL_0_)).
The US has recieved several monuments from other countries that had nothing to do with the donating country (like that Russian 9/11 monument, or the Statue of Liberty). But I can't find any evidense that we (the US) h... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/14gmpx/what_memorialsmonuments_if_any_has_the_usa/ | {
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41,
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"text": [
"[Does this count?](_URL_0_)\n\n > Studentend... | [] | [
"http://www.reddit.com/r/pics/comments/14g8j1/russian_911_monument_for_usa/c7cttxn"
] | [
[
"http://en.wikipedia.org/wiki/Schlachtensee_Student_Village"
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"http://4.bp.blogspot.com/_zWuTtHWkHU8/SwcJG_S3enI/AAAAAAAAAYs/_F-O1fhI5go/s1600/tresdesnudos.jpg"
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[],
[
"http://www.flickr.com/photos/sigurtor/6078126932",
"http://www.abmc.gov/memorials/memorials.php",
"http://en.... | |
86vtql | What exactly was the Battle of Actium? | Why was Marc Antony and Ptolemaic Egypt warring against Octavian? What was the motivation? What was the Outcome? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/86vtql/what_exactly_was_the_battle_of_actium/ | {
"a_id": [
"dwy68qq"
],
"score": [
2
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"text": [
"Not to discourage any further answers but while you wait you'll probably enjoy these older posts:\n\n[What was Mark Antony's intention when he gave Rome's lands to Egypt in 34BC? And why did it take Rome two years to start a war against him?](_UR... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/6iem2e/what_was_the_religion_of_egypt_like_after/",
"https://www.reddit.com/r/AskHistorians/comments/5w8lrw/what_happened_to_the_ptolemaic_egyptian/?st=izwoo53i&sh=eff23e7d",
"https://www.reddit.com/r/AskHistorians/comments/7ot9xi/did_augustus_order... | |
4l5sjd | seeing as video/picture quality is constantly increasing (1080p, 4k etc..), is there a limit to the quality that the human eye can notice a difference? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4l5sjd/eli5_seeing_as_videopicture_quality_is_constantly/ | {
"a_id": [
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"text": [
"Theres alot of conversation about this actually...\n\nYou really need to focus on DPI, since 1080p is very different on a 20\" tv vs an 80\".\n\nBut then it matters how far away it is, and how good your vision is...\n\nSome... | [] | [] | [
[],
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"https://www.reddit.com/r/askscience/comments/2u3oum/does_the_human_eye_have_a_quantifiable_image/?ref=search_posts"
]
] | ||
2yktlq | how do studios get to film in places as dense as new york without interrupting business and traffic, while also not being interrupted during filming? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2yktlq/eli5_how_do_studios_get_to_film_in_places_as/ | {
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"The majority of the time, it's just green sc... | [] | [] | [
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[],
[],
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"http://captainamericafilmingmanchester.co.uk/"
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[],
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"https://www.youtube.com/watch?v=LuDN2bCIyus"
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cintr9 | why do large amounts of flammable material in a small space explode (ex: gasoline can) when ignited instead of just lighting on fire and burning like wood | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cintr9/eli5_why_do_large_amounts_of_flammable_material/ | {
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"Burning causes things to expand, heat up and release gases. if its in an enclosed space such as a pipe, grenade casing, gas can, etc... then the pressure from these reactions builds up causing the big ... | [] | [] | [
[],
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