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 |
|---|---|---|---|---|---|---|---|---|---|
1m6dmi | Why is hot metal softer? | For centuries, people have known that if you heat up metals, they are easier to bend and forge. Why? What is going on with the atoms that results in a lower force required to move them around? | askscience | http://www.reddit.com/r/askscience/comments/1m6dmi/why_is_hot_metal_softer/ | {
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"This is somewhat tricky to answer because metals have many different structures and atomic arrangements, depending on the material. In an ideal metal, the atoms are held together by a metallic bond in a perfect, repeating crystallized structure. ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/File:CrystalGrain.jpg"
]
] | |
1zsxbm | Are there any entirely fictional people commonly taught in history classes in North America? | The reason for my question is I currently live in China and students here learn about entirely fictional people, or, more accurately, real people whose entire biography is fictional.
I see this as a crass propaganda tool, but I also wonder if the same isn't happening back home. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1zsxbm/are_there_any_entirely_fictional_people_commonly/ | {
"a_id": [
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"text": [
"Do you mean as a way of illustrating an \"average\" person? It's a common thing to 'create' people in order to help children understand more complex ideas from a relatable viewpoint. For instance life in a 13th century Engli... | [] | [] | [
[],
[]
] | |
ahfd0l | what are and how effective are sabermetrics, and can they be applied to other sports? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ahfd0l/eli5_what_are_and_how_effective_are_sabermetrics/ | {
"a_id": [
"eee26g8"
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"text": [
"Sabermetrics in baseball is a statistical analysis of performance. The idea is to shift away from aggregate measures like \"hits per at bat\" which have tactical dependencies that consider who's on which base and the overall state of the game. ... | [] | [] | [
[]
] | ||
ze3xi | How was marriage viewed in the 1800s - early 1900s as opposed to now? | Were marriages viewed as giant love-fests like they are now. Also, how different were the parties? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/ze3xi/how_was_marriage_viewed_in_the_1800s_early_1900s/ | {
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"text": [
"For much of Korean history, marriage for most was quite like a business arrangement between families. Women as well as men worked in the fields or in craft industries - men and ... | [] | [] | [
[],
[],
[
"http://news.bbc.co.uk/hi/english/static/events/reith_99/week4/week4.htm"
],
[]
] | |
2ljk2n | what are the financial advantages for video game developers to make their game for one system only? | Why would the developers of "The Last of Us" want to make a game that is only for the PS3 users? I'm trying to figure out how it would be financially advantageous for them to sell to only one group, instead of developing the game for all platforms so that they could make more money. (I'm not trying to pick on "The Last... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ljk2n/eli5_what_are_the_financial_advantages_for_video/ | {
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"text": [
"People answered for consoles, I'll give my answer for PC.\n\nSome PC games will not play well on consoles. When the consoles got Civilization it was an entirely different game. If ... | [] | [] | [
[],
[],
[],
[
"http://thatdragoncancer.com/post/61670610520/that-scapegoat-insert-people-group-here"
]
] | |
6yaybj | what's the deal with those tar pits in the usa? | So I've been watching many shows and series made in the USA, some of them with a plot revolving around Hollywood.
Some of them talk about tar pits that are lying there. So.. what's the deal with that?
Are they man-made or by nature (and if so, what's the science behind it). | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6yaybj/eli5_whats_the_deal_with_those_tar_pits_in_the_usa/ | {
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"dmly1gi",
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"score": [
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3,
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"text": [
"Those are most likely the La Brea tar pits. It's a popular tourist attraction and they're in a public park, so they're happy to get the money.\n\nThe pits are naturally-formed (tar is naturally formed ... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/La_Brea_Tar_Pits"
],
[]
] | |
974dmv | "Under God" was added to the US Pledge of Allegiance in 1954; what was the background behind this change? Was there any controversy accompanying it at the time? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/974dmv/under_god_was_added_to_the_us_pledge_of/ | {
"a_id": [
"e46doxa"
],
"score": [
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"text": [
"The change to the pledge was part of a broader movement over the past decade in the United States to distinguish Americans from \"godless Communists\" during the Cold War. There was a rise of civil religion—church attendance and profession of be... | [] | [] | [
[]
] | ||
7vgs6j | why are brass, copper, and bronze used in pluming? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7vgs6j/eli5_why_are_brass_copper_and_bronze_used_in/ | {
"a_id": [
"dts5e2i"
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"score": [
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],
"text": [
"They're very corrosion resistant, considering the constant exposure to water. They're also very malleable (meaning they're easily shaped into tube and pipe) and not toxic, plus it is easy enough to be bent by hand rather than having to fabricate ... | [] | [] | [
[]
] | |
689ih3 | what happens to a file when it is uninstalled from a computer? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/689ih3/eli5what_happens_to_a_file_when_it_is_uninstalled/ | {
"a_id": [
"dgwpxqi",
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"score": [
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21,
2
],
"text": [
"Your computer saves things by changing the ones and zeroes on disk. It doesn't matter what those bits were before you saved something, so there is no such thing as \"empty\" memory. As such, there's no... | [] | [] | [
[],
[],
[]
] | ||
610nc0 | what are moments, skewness and kurtosis in statistics? ;-; | I've been looking around on the internet for a simple explanation and stuff like "a moment is a summary measure of a probability distribution" doesn't cut it.
I'm confused. I'm a little stupid. And I have nowhere else to turn to except for ELI5 to explain these foreign fancy terms to me like I'm 5.
EDIT:
I also need t... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/610nc0/eli5_what_are_moments_skewness_and_kurtosis_in/ | {
"a_id": [
"dfasmq6",
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"score": [
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2,
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"text": [
"Did you find this [article](_URL_0_) ?",
"Somewhat vague explanation: If you're familiar with the basic shapes of polynomial graphs ([example showing degrees 1-6](_URL_0_)), then you can think of ea... | [] | [] | [
[
"https://funpsychology.wordpress.com/statistics-in-psychology/moments-skewness-and-kurtosis/"
],
[
"https://goo.gl/images/3IPLcm"
],
[]
] | |
79mzam | What was the decision making process behind choosing Normandy as a target for invasion as opposed to Calais, Belgium, Netherlands, Denmark, etc? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/79mzam/what_was_the_decision_making_process_behind/ | {
"a_id": [
"dp37fgv",
"dp3amgq"
],
"score": [
3,
54
],
"text": [
"Forgot to mention in the title, in World War 2 of course",
"Choosing a landing site required finding a compromise on a number of factors. The chosen site had to be within aircraft range of the UK, so the beachhead could... | [] | [] | [
[],
[]
] | ||
l4s0b | How would I go about testing and documenting a theory/hypothosis without being a scientist? | I have theory ( food and health related) and I would love to do an official study with proper sample sizes, but I'm not a scientist, nor am I a student. I don't have the money or the resources to do such a study. What are some of my options. | askscience | http://www.reddit.com/r/askscience/comments/l4s0b/how_would_i_go_about_testing_and_documenting_a/ | {
"a_id": [
"c2ps71k",
"c2ps71k"
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"score": [
3,
3
],
"text": [
"One option is to contact a research centre at a local university/hospital/etc that performs research in the particular field, and attempt to get them on board. Unless it is blindingly obvious that your study would be benefic... | [] | [] | [
[],
[]
] | |
w9xmf | Is there a material so dense that smells can't get through? | Just recently got on the topic of the sense of smell and had a few questions that I couldn't find the answers to.
Is there a material so dense that smells can't get through it?
Are all of the 5 million receptors in our nose different shapes, accepting only certain kinds of molecules?
Is the reason certain dangerous ... | askscience | http://www.reddit.com/r/askscience/comments/w9xmf/is_there_a_material_so_dense_that_smells_cant_get/ | {
"a_id": [
"c5biqoj",
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"score": [
7,
3,
2
],
"text": [
"That's not a hard requirement. Depending on the size of the molecule just a thin sheet of plastic wrap could stop smells. The steel of a gas bottle certainly stops the diffusion of gas.",
"Not reall... | [] | [] | [
[],
[],
[]
] | |
fjjk1l | Did the confederacy during the civil war ever make any music? Like a confederate "Hail to the chief"? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/fjjk1l/did_the_confederacy_during_the_civil_war_ever/ | {
"a_id": [
"fkndsaz"
],
"score": [
2
],
"text": [
"[This older answer of mine](_URL_0_) focuses on one of the most popular songs of the Confederacy."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/cat2qs/during_the_american_civil_war_did_the_federals/etaw0bt/"
]
] | ||
1oyz1z | Why do people use "old timey voice" when mimicking historical people from the past 150 years? | An example of the voice is found here used by Conan O'Brien at 5:27: _URL_0_
Is that how everyone talked? If so, why? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1oyz1z/why_do_people_use_old_timey_voice_when_mimicking/ | {
"a_id": [
"ccx4ck1"
],
"score": [
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"text": [
"Public speakers, leaders, and entertainers in the 19th century were almost always trained in elocution. It was an important part of education - search for elocution in this 1857 [McGuffey's Reader](_URL_0_) for an example, and in passing to marv... | [] | [
"http://www.youtube.com/watch?v=OUMwIwOD49g#t=5m27s"
] | [
[
"http://www.gutenberg.org/cache/epub/15040/pg15040.html"
]
] | |
2f7xvy | stud finders / stud sensors | Are they really accurate? How? I would never place a bet on my stud finding ability. Please help! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2f7xvy/eli5_stud_finders_stud_sensors/ | {
"a_id": [
"ck6qfgg",
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"score": [
3,
3
],
"text": [
"They are mini metal detectors. They don't have a long range and are usually fairly accurate unless the stud is buried deep or there's some other piece of metal that distracts it.",
"There are two types, one senses metal,... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Stud_finder"
]
] | |
4fmsf6 | How do they polarize glass? | Evert time i google how polarized glass is made i get some non-technical stuff about how they are good for fishing, reduce glare, remove horizontal light waves. One article mentioned something about iodine crystals but didn't elaborate.
I just want to know how they treat the glass to get the polarization effect. | askscience | https://www.reddit.com/r/askscience/comments/4fmsf6/how_do_they_polarize_glass/ | {
"a_id": [
"d2a6czs"
],
"score": [
28
],
"text": [
"There are many different ways, one is simply placing a PVA (poly vinyl acetate) foil on the glass. This material approximately has the consistency and thickness of plastic wrap. The manufacturing process begins by heating and stretching PVA to f... | [] | [] | [
[]
] | |
11qpz3 | Are taste buds (human and animal) programmed from birth to 'like' or 'dislike' certain flavours? | How, for example, do predatory animals know to consume meat instead of vegetables? Obviously these carnivorous animals have bodily systems which could not handle the consumption of certain foods - are taste buds therefore programmed to 'like' foods which are compatible with the body they reside in?
Are the appeal of ... | askscience | http://www.reddit.com/r/askscience/comments/11qpz3/are_taste_buds_human_and_animal_programmed_from/ | {
"a_id": [
"c6orn0s"
],
"score": [
3
],
"text": [
"Can't answer your question entirely, but the sense of smell comes from chemical receptors, which are genetically programmed. However, it's a receptor, and it doesn't indicate that you like or hate something, necessarily. For instance, Durian fr... | [] | [] | [
[]
] | |
nwaog | wittgenstein | I'm preparing for a exam the 3rd of january, but because I had to move to my new appartment at the same time I haven't had time to read about Wittgenstein.
I'm studying about HCI(Human Computer Interaction), focusing on the philosophy by Paul Dourish... Please help.
| explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/nwaog/eli5wittgenstein/ | {
"a_id": [
"c3cjzmx",
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"score": [
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2
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"text": [
"I agree with the above post - you'd have to narrow down what you want to know about Wittgenstein. However, you're in luck! As there exists a comic book which explains various bits of Wittgenstein in a very simplified manner ... | [] | [] | [
[
"http://www.logicomix.com/en/"
],
[
"http://www.logicomix.com/en/"
]
] | |
23rz6r | how is it possible that our brain is able to calculate trajectory (e.g. throwing an object at something) so easily (especially if i'm so bad at math)? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23rz6r/eli5_how_is_it_possible_that_our_brain_is_able_to/ | {
"a_id": [
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"score": [
2,
7,
5,
4
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"text": [
"Thank your binocular vision, try to make the same shot with on eye closed.",
"what you are doing is what most physicists do when looking into new equations or formulas - \"firs... | [] | [] | [
[],
[],
[],
[]
] | ||
he6a7 | What is required for a car to hydroplane? | The wikipedia article mentions what can cause hydroplaning but it does not say specificially.
It's been raining here for a week and every time it does I wonder, how fast does the car have to be going? How much deep does the water need to be? How big of a pool of water do you need?
Whenever it rains here people always... | askscience | http://www.reddit.com/r/askscience/comments/he6a7/what_is_required_for_a_car_to_hydroplane/ | {
"a_id": [
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"score": [
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"text": [
"You can hydroplane on very little water, all you need is enough to coat the surface of the road. \n\nWhat keeps you from hydroplaning is the tread on your tire. At speed the treads act like a high speed pump, channeling water into the tread patte... | [] | [] | [
[]
] | |
362ylz | Silk Road Reading | I'm looking for a book that gives a general overview of the Silk Road trading network, any recommendations? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/362ylz/silk_road_reading/ | {
"a_id": [
"craag59",
"craarui"
],
"score": [
2,
3
],
"text": [
"*Travels of Marco Polo,* and for the highly entertaining historical fictional twist, *The Journeyer* by Gary Jennings",
"Also, *Foreign Devils on the Silk Road* is a really fascinating and engaging look at history of exc... | [] | [] | [
[],
[]
] | |
5lrp0l | why do we get that strange feeling in our head when something sharp and long is pointing right between our eyes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5lrp0l/eli5_why_do_we_get_that_strange_feeling_in_our/ | {
"a_id": [
"dbxwvzo"
],
"score": [
2
],
"text": [
"Doesn't work for me. Maybe it's because I don't use my left eye? Maybe it's related to the Ajna chakra point (third eye) and I mediate almost daily? Can you explain the sensation."
]
} | [] | [] | [
[]
] | ||
27wwt6 | In protracted conflicts and wars, especially where soldiers were conscripted, does the 'quality' of soldier decrease as the war goes on? | So I was reading a book (*Tripwire* by Lee Childs, if anyone is interested) and there is a passage in it when the characters are talking about the war in Vietnam and the fact that the quality of soldiers decreased as time went on.
The section reads;
> Even if you signed up again right away it was nine months minimum... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/27wwt6/in_protracted_conflicts_and_wars_especially_where/ | {
"a_id": [
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"text": [
"It would rather depend on the nature of the state and its army at the time.\n\nIn Britain, there is no indication of a deterioration in the quality of the army as the Napoleonic wars went on, and I have... | [] | [] | [
[],
[],
[
"http://www.reddit.com/r/AskHistorians/comments/27zowe/did_the_us_military_reorganize_itself_after_the/ci650x6"
]
] | |
2rlmei | color wheel versus visible light spectrum | Sorry for the vauge title,but here's my question: Why is the opposite of red green on a color wheel, yet in terms of wavelength, red's opposite is violet? What is the difference?
I'm going to assume its about light vs shades (like how all the colors of light make white, but all the shades, like when mixing paint, make... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rlmei/eli5_color_wheel_versus_visible_light_spectrum/ | {
"a_id": [
"cnh0x60"
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"score": [
2
],
"text": [
"With visible light, red doesn't come after/before violet and violet doesn't come after/before red. On the color wheel it does because it makes finding relationships between colors easier than a straight line. Green being the opposite of red has e... | [] | [] | [
[]
] | |
1b3kgo | How fast are the particles in the LHC moving relative to each other? | askscience | http://www.reddit.com/r/askscience/comments/1b3kgo/how_fast_are_the_particles_in_the_lhc_moving/ | {
"a_id": [
"c9397b1"
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"score": [
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"text": [
"The last c in your equation should also be squared and then you get \n\n2vc/(1-v^2 )=0.99999999999999999999999999999988*c\n\nAnyhoo, From the view of the LHC the relative velocity of the particles is just 2*v*c The velocity addition comes into pl... | [] | [] | [
[]
] | ||
237a2a | class warfare | Not really sure what to think about it. I see a lot of people that are "for" class warfare and "against" class warfare. What exactly takes place during class warfare and why do people either want it or not? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/237a2a/eli5_class_warfare/ | {
"a_id": [
"cgu481i",
"cgu4djk"
],
"score": [
2,
2
],
"text": [
"Class warfare is the idea that one class of people, usually the rich or well-to-do, either take action to prevent the poor from \"rising above their station\", or support policies which help suppress the poor, or are otherwi... | [] | [] | [
[],
[]
] | |
3x1u5d | what is self-healing plastic and how does it work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3x1u5d/eli5what_is_selfhealing_plastic_and_how_does_it/ | {
"a_id": [
"cy0vqea"
],
"score": [
3
],
"text": [
"I'm not an expert but I believe that self-healing plastic is a typical long-chain polymer material that contains pockets of liquid plastic. When the material is broken, these pockets of liquid plastic get broken open and the liquid fills the gap ... | [] | [] | [
[]
] | ||
4p0pi2 | Religious relic? | Hello, I'm a concrete cutter and a fellow coworker for another company was requested to dig this item up. They were super hush hush about it all. Its about as big as the palm of your hand and has these markings. Church people from byu where there and took it immediately once it was dug up. They requested no pictures b... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4p0pi2/religious_relic/ | {
"a_id": [
"d4haskv"
],
"score": [
2
],
"text": [
"I agree with Bodrk43: it looks like a benchmark or surveyor's mark of some sort. If it's a US Geological Survey benchmark, then destroying it is a crime. If it was set by some other agency or a private party, I don't know what the law says but I ... | [] | [
"http://imgur.com/FX7du7F"
] | [
[]
] | |
51jnjz | Have there been female rulers with harems? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/51jnjz/have_there_been_female_rulers_with_harems/ | {
"a_id": [
"d7ct10t",
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"score": [
38,
10
],
"text": [
"Follow up question: the Ottoman and various chinese dynasties had harems where concubines competed for political influence, and occasionally one concubine rose to the top of the entire governemnt, fir example Wu Zetian. W... | [] | [] | [
[],
[]
] | ||
2l2on1 | what really happens when people die of "old age" or "natural causes" ? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2l2on1/eli5_what_really_happens_when_people_die_of_old/ | {
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"clr63w3",
"clr69fs",
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"c... | [] | [] | [
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"http://en.wikipedia.org/wiki/Telomere#Shortening"
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"http://www.geneticliteracyproject.org/2014/04/24/old-blood-new-science-115-year-old-womans-blood-suggests-lifespan-depends-on-stem-cells/"
],
[],
[
"http://reddit.com/r/Futurology/c... | ||
cj1ugu | Western texts talk at length about Eastern goods received from the Silk Road such as spices and silk. What Western goods went east through the Silk Road of Antiquity that were in high demand for Eastern traders? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cj1ugu/western_texts_talk_at_length_about_eastern_goods/ | {
"a_id": [
"evb7c4h",
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"score": [
168,
264,
50
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"text": [
"Perhaps [this answer](_URL_0_) by u/Mighty_Dighty22 to a similar question can shed some light while we wait for other answers.",
"With respect to the Roman period, we have a few clues. *The His... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/bz66f2/we_always_hear_about_how_the_silk_road_benefited/eqr8uzo"
],
[
"https://depts.washington.edu/silkroad/texts/hhshu/hou_han_shu.html#sec12"
],
[
"https://www.jstor.org/stable/20619501",
"https://books.google.ca/books?id=FVgzAQAAQBAJ&... | ||
plg3r | how things such as albums and photos are leaked onto the internet. | Every so often I'll see something like "Scarlett Johanson Nude Pics LEAKED" or "LEAKED JK ROWLING CHAPTER!". I was simply wondering how things such as that are accessed, and just the general processed that shares such information with the internets.
Oh yeah, and I'm 5. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/plg3r/eli5_how_things_such_as_albums_and_photos_are/ | {
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"It's a good real world example of how a secret is something you tell NOONE. Once you tell anyone, it has a very good chance of not being a secret for long.\n\nAn imaginary scenario would be something like the chapter of a book sent to a lot of p... | [] | [] | [
[]
] | |
1zzjro | pluto's orbit | I've been digging around the internet for a few hours and I've yet to find a satisfying answer about WHY Pluto's orbit is so different from that of other major bodies in the solar system.
Why is Pluto's orbit at an angle? Why is it such a severe ellipse? What, exactly, is Pluto (or it's barycenter, at least) orbiting?... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1zzjro/eli5_plutos_orbit/ | {
"a_id": [
"cfyp27k"
],
"score": [
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"text": [
"Pluto isn't actually an oddball. Most dwarf planets have highly eliptical, angled orbits. [see this side-view image of the solar system with several dwarf planets and kuiper belt objects highlighted](_URL_0_)"
]
} | [] | [] | [
[
"http://www.lunarplanner.com/Images/asteroid-orbits/dwarf-orbits-side.gif"
]
] | |
l9u7s | why such widespread poverty still exists in the 21st century. | Also, I'm interested in knowing why the gap between rich and poor (both within countries and between countries) is growing rather than closing.
Also, I am very interested in this subject even though I don't know much about it, so feel free to suggest things for me to read/watch. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/l9u7s/eli5_why_such_widespread_poverty_still_exists_in/ | {
"a_id": [
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"text": [
"It has become institutionally acceptable for American Corporations to lay off literally millions of people and then ship those jobs overseas while paying maybe $3 a day.\n\nThe reason other countries accept these jobs goes b... | [] | [] | [
[
"http://www.youtube.com/watch?v=EdyLtFvzR9w",
"http://www.youtube.com/watch?v=yTbdnNgqfs8"
],
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"http://www.youtube.com/watch?v=EdyLtFvzR9w",
"http://www.youtube.com/watch?v=yTbdnNgqfs8"
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] | |
gd95d | When two photons interfere, what happens to their energy? | Last night I was thinking about how light works and I realized I don't actually understand interference. If a photon hits my retina, it excites some electrons and makes my opsin change shape using that energy, ultimately sending a signal to my brain. But if two interfering photons hit my retina, nothing happens. What g... | askscience | http://www.reddit.com/r/askscience/comments/gd95d/when_two_photons_interfere_what_happens_to_their/ | {
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"text": [
"Every destructive minimum has a corresponding constructive maximum.",
"Interference is a wavelike phenomenon, so you can't think of it in terms of what happens to discrete photons. Destructively in... | [] | [] | [
[],
[],
[
"https://secure.wikimedia.org/wikipedia/en/wiki/Wave_equation",
"https://secure.wikimedia.org/wikipedia/en/wiki/Standing_wave"
]
] | |
1bwi5d | what philosophical assumptions does science make? what are the 'beliefs' inherent in scientific inquiry? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1bwi5d/eli5_what_philosophical_assumptions_does_science/ | {
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"That induction works, which is a perfectly fine assumption to make. Generally we assume that our senses aren't lying and what happens t... | [] | [] | [
[],
[],
[],
[],
[],
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"http://rationalwiki.org/wiki/Methodological_naturalism"
]
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zumia | Would the Third Reich have supported the creation of Israel? | I know this may sound a bit ridiculous, but it's a thing I've wondered about a few a times. The nazis wanted to get rid of jews from Europe. Zionists wanted jews to move to the Holy Land from Europe. Before WWII, Palestine was a British mandate, and it was of little importance for the germans, especially before the war... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/zumia/would_the_third_reich_have_supported_the_creation/ | {
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"text": [
"I think this is a fair question to ask, given that much of the groundwork of the Jewish state was well in motion by the time of Nazi Germany (Third Reich is a propaganda term they themselves coined).\... | [] | [] | [
[],
[],
[]
] | |
vz4ip | warts. | I know they're a virus. But how are they spread? I have one on my finger and it appeared randomly. I have had one once before on my foot but that was 10+ years ago. How would I have gotten the one on my finger?
I guess this could pertain to genital warts, too but I just mean regular warts.
Also I have not been pla... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/vz4ip/eli5_warts/ | {
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"You can have the virus (HPV) on your body without necessarily having any visible effects o... | [] | [] | [
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"http://www.reddit.com/r/explainlikeimfive/comments/qa005/eli5_wart_removal/c3w2i4h"
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[],
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] | |
4h1a4f | how can a single strand dna hold almost a zettabyte of digital storage? | Single strand of*
| explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4h1a4f/eli5_how_can_a_single_strand_dna_hold_almost_a/ | {
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"score": [
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2
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"text": [
"i hate to sound flippant but the answer is that our current technology has storage density limitations that prevent us from doing the same thing our DNA does. Data does not inherently take *any* space really. at least, not a... | [] | [] | [
[],
[]
] | |
1rili0 | why do we still have single cell/simple organisms? | The theory of evolution, as far as I know, says that we evolved from single cells organisms. My question is why do those things still exist? If life all began at the same point, why haven't we all evolved into humans or fish, or whatever. I get the idea of random chance affecting it. But looking over billions of years ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rili0/why_do_we_still_have_single_cellsimple_organisms/ | {
"a_id": [
"cdnlyp8"
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"score": [
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"text": [
"Bacteria is the most successful thing on this planet with about 5*10^30 individuals. Some scientists estimate the total weight of bacteria exceeds that of both plants and animals. So a better question to ask would be why we are even here?\n\nYou ... | [] | [] | [
[]
] | |
akia5i | Why are most psychedelic plants native to Latin American countries? | askscience | https://www.reddit.com/r/askscience/comments/akia5i/why_are_most_psychedelic_plants_native_to_latin/ | {
"a_id": [
"ef7iac5",
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],
"text": [
"There are many psychedelic plants native to temperate and even artic countries. I think the reason so many come from the tropics (where most Latin American countries lie) is because the tropics have the highest level of bio... | [] | [] | [
[],
[]
] | ||
hd3o5 | Does one have greater sense if the sensory organ (nose, mouth, eyes) in particular is larger than normal? | And if so, as evolutionary beings, shouldn't we reproduce with those who have larger sensory organs to ensure that our offspring has a greater capacity of experience? | askscience | http://www.reddit.com/r/askscience/comments/hd3o5/does_one_have_greater_sense_if_the_sensory_organ/ | {
"a_id": [
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"score": [
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],
"text": [
"No. Perception is based on the amount of receptors. While you could potentially link the size of the sensory organ to the number of receptors, I haven't seen that it makes a difference. \n\nExample: A dog nose is thousands o... | [] | [] | [
[],
[]
] | |
2zvivg | How do black holes combine? | Read something in a textbook about them being able to combine into a larger one, but how is this possible? What exactly is a black hole? Is it something tangible that can be manipulated? Sorry for multiple questions but i find this whole thing extremely perplexing.
EDIT: thanks for the concise answers this helped a lo... | askscience | http://www.reddit.com/r/askscience/comments/2zvivg/how_do_black_holes_combine/ | {
"a_id": [
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],
"text": [
"Scientists have never observed black holes merging, but it is possible. Almost every galaxy contains a black hole at it's center, so scientists have said it is most likely to happen when two galaxies collide and their superm... | [] | [] | [
[],
[
"https://www.youtube.com/watch?v=ENd8Sz0AFOk"
]
] | |
3irkqy | How were battles fought during the Flowery Wars involving the Aztecs, in terms of tactics, weaponry, etc.? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3irkqy/how_were_battles_fought_during_the_flowery_wars/ | {
"a_id": [
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"text": [
"According to Ross Hassig, flower wars were pretty much the same as other conflicts. The exception being is that armies would not make use of projectiles. Part of this reason is that projectiles can easily kill a person, but projectiles are also ... | [] | [] | [
[]
] | ||
30xarj | why netflix's "recently added" column has all the newest releases, while it's "new releases" contains mostly movies that have been on netflix for months-years. | Über annoying in my opinion. Not for nothing, by I also wish they had a way to view traditional genres. It's a fantastic service, but their categorization kinda sucks. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/30xarj/eli5_why_netflixs_recently_added_column_has_all/ | {
"a_id": [
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"score": [
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"text": [
"It's based off of your recommended shows/movies so if you have a specific taste, the newest movie in that category might be a year old."
]
} | [] | [] | [
[]
] | |
1dmbtn | Why is beer foam white, and not the same colour as the beer? | askscience | http://www.reddit.com/r/askscience/comments/1dmbtn/why_is_beer_foam_white_and_not_the_same_colour_as/ | {
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"text": [
"the light is scattered through the thin film of the bubbles, causing it to look like a... | [] | [] | [
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],
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"http://en.wikipedia.org/wiki/Beer_measurement#Colour",
"http://beerrecipes.org/beercolor.php"
],
[],
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] | ||
959c4r | with the epa allowing asbestos again, what exactly is it, what are those commercials saying, should i be scared, and if so what can i do to prevent harm? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/959c4r/eli5_with_the_epa_allowing_asbestos_again_what/ | {
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"Asbestos is so dangerous because when it breaks, even just a little, it has a tendency to produce long, thin fibers of asbestos. These are *supremely* dangerous in how they can rack up lung damage wit... | [] | [] | [
[],
[],
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] | ||
425p5u | In Ontario, Canada. Why are there two towns/cities named "London" and "Paris"? Did the names have any influence from the much larger, famous European counterparts? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/425p5u/in_ontario_canada_why_are_there_two_townscities/ | {
"a_id": [
"cz82a22"
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"score": [
3
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"text": [
"I have a great book called [\"Ontario Place Names\" by David E. Scott](_URL_0_). He has tracked the history and meaning of the name for pretty much every hamlet/village/town/city in Ontario. Some are quite brief and he cannot determine the meanin... | [] | [] | [
[
"https://www.chapters.indigo.ca/en-ca/books/ontario-place-names/9781551050874-item.html"
]
] | ||
3unt5v | Can zygotes fully develop to term in vitro/without a mother? | I tried searching around the wiki/FAQs and didn't find a question like this, and reddit search is never very helpful. But anyway, all ethics and morals aside...
So say we go through the IVF process with a human sperm/egg, but we don't have someone to be a surrogate mother.
Is it possible for the zygote fully develop... | askscience | https://www.reddit.com/r/askscience/comments/3unt5v/can_zygotes_fully_develop_to_term_in_vitrowithout/ | {
"a_id": [
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"text": [
"Impossible at this time.\n\nTypically right now IVF embryo transfers occur at about day 5 or 6 after conception when the embryo is about 60-100 cells in the blastocyst form.\n\nOn their own they start dying more rapidly if left to grow after that... | [] | [] | [
[]
] | |
3olwx0 | when driving does a change in air pressure determine how much fuel you use (mpg) etc.. | Ive noticed when I drive places, even though im doing the same journey and the same speed etc.. my fuel gauge will say different?? Really confuses me.. HELP! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3olwx0/eli5_when_driving_does_a_change_in_air_pressure/ | {
"a_id": [
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"text": [
"Yes...but not very much. Also, fuel gauges aren't all that accurate.\n\nProbably the most noticeable effect on MPG, for the same trip at the same speed, is wind. Headwind or crosswind will decrease it, tailwind will increase it. Many other thi... | [] | [] | [
[]
] | |
j3szh | what does it mean when someone "itemizes" their taxes? also is this somehow related to deductions. actually, eli5 deductions as well. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/j3szh/eli5_what_does_it_mean_when_someone_itemizes/ | {
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"text": [
"When figuring out your taxes, there are certain things that the government has decided you don't have to pay taxes (or can pay less taxes) on. Because you're deducting them from the amount you have to pay, they're called deductions. They are for ... | [] | [] | [
[]
] | ||
6zvkpl | Were there any Confederate generals who were anti-slavery? On the other side of that coin were there any Union generals who were pro-slavery? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6zvkpl/were_there_any_confederate_generals_who_were/ | {
"a_id": [
"dmzazzx"
],
"score": [
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"text": [
"I do not believe there were any Confederate Generals who were anti-slavery. In 1861 it was actually quite dangerous for any American citizen to express anti-slavery views while in the South. You will see quotes from men such as Lee which indica... | [] | [] | [
[]
] | ||
ft9gco | AITA for asking some maroon friends to help me steal from the Spanish only to accidentally spark a four-year-long scorched earth campaign against my allies? | Okay so some background. In 1572, my good buddy Francis and I went to Panama to try and steal some of that sweet sweet Peruvian silver from the Spanish. Things went pretty well. After a bit of a kerfufle in Nombre de Dios we regrouped and even made some friends with some local runaway slaves, *cimarrons* they call them... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ft9gco/aita_for_asking_some_maroon_friends_to_help_me/ | {
"a_id": [
"fm69iww",
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19
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"text": [
"NTA. Now, I normally don't support things like stealing and interfering in other people's affairs, but it sounds like good came out of it (the Maroons freeing slaves). Yes, there might have been a lot of deaths, but sounds... | [] | [] | [
[],
[]
] | |
45ycr8 | Why are there so many things named "Columbia" in the United States. Does it have any relation to Columbia the country? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/45ycr8/why_are_there_so_many_things_named_columbia_in/ | {
"a_id": [
"d01nudu"
],
"score": [
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],
"text": [
"Only insofar as they have the same source: the name of Christopher Columbus.\n\n\"America\" is kind of an odd name, taken from cartographer Amerigo Vespucci. But it caught on, the way things that are kind of counterintuitive will sometimes.\n\nTh... | [] | [] | [
[]
] | ||
1104uo | helpful maps | I received exceptional help the last time I visited this subreddit and I was hoing to receive some more. I am trying to study the political struggles of Prusia and the Hohenzollern dynasty. I was wondring if anyone has any suggestins for websites or applications for world maps. I struggle trying to keep up with my read... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1104uo/helpful_maps/ | {
"a_id": [
"c6i4k0d",
"c6ia4ik"
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"score": [
2,
2
],
"text": [
"Could always try /r/mapporn there is loads of useful images there.\n",
"_URL_0_ is my goto map website."
]
} | [] | [] | [
[],
[
"davidrumsy.com"
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] | |
16dmcl | Does chemotherapy affect the health of a male's future offspring, conceived years after treatment? | I was treated for a form of cancer several years ago. I had sperm samples frozen in case my treatment left me infertile. I have heard that you should avoid conceiving for a [couple of years](_URL_0_) after treatment, as your sperm count can recover but the sperm may be unhealthy in some way.
My question is after this... | askscience | http://www.reddit.com/r/askscience/comments/16dmcl/does_chemotherapy_affect_the_health_of_a_males/ | {
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"c7va7g5",
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"score": [
3,
2,
2
],
"text": [
"Be careful answering this post, as it borders on asking for medical advice. Linking to relevant papers is probably okay, but telling OP whether or not he should have kids wouldn't be... Obviously it's u... | [] | [
"http://www.oncolink.org/coping/article.cfm?c=4&s=42&ss=90&id=992"
] | [
[],
[
"http://theturekclinic.com/services/male-fertility/male-fertility-preservation/"
],
[
"http://www.bloomberg.com/news/2012-05-21/wwii-chemical-exposure-may-pass-down-disease-study-finds.html",
"http://www.livestrong.com/article/124963-after-effects-chemotherapy-male-fertility/",
"http://w... | |
icz6s | If there really was another planet orbiting the sun opposite the earth as some people claim, how would we know? | In other words, how do we know their isn't? Just to be clear, I'm not one of these people that believe it, I'm just interested in going deeper.
What things would be different? Would it effect the other orbits? Would he have seen it with one of our many probes by now? | askscience | http://www.reddit.com/r/askscience/comments/icz6s/if_there_really_was_another_planet_orbiting_the/ | {
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"score": [
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"text": [
"Yes, it would affect the orbits of other planets. Also, other planets would affect its orbit, so it would be ha... | [] | [] | [
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"http://en.wikipedia.org/wiki/Lagrangian_point#L3"
],
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"http://www.youtube.com/watch?v=blE9gpnKpT4"
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"http://en.wikipedia.org/wiki/Nemesis_\\(hypothetical_star\\)"
],
[
"http://en.wikipedia.org/wiki/Lagrangian_point"
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[]
] | |
ujf7c | [Meta] New r/askhistorians official policies. | I. Posting
Every post must be one of three things, an actual question, an AMA, or a [Meta] post. Anything that is not one of these three things are to be reported and subsequently deleted.
1A. Questions
Questions should be regarding history, either directly (e.g. What events led up to the War of 1812), or indirectl... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/ujf7c/meta_new_raskhistorians_official_policies/ | {
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3sf652 | why do next gen video games all require downloading new content immediately after purchase? why can't they sell complete games out of the box anymore? | Have purchased three PS4 games in the last few months and each one has required time to download before playing the full game. Are games too fat to fit into one CD anymore? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3sf652/eli5_why_do_next_gen_video_games_all_require/ | {
"a_id": [
"cwwn02u"
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"text": [
"Printing discs, boxing and shipping take a while to do, and because games have to be shipped to retails days before the release in order to ensure that they have them available for purchase that day, this packaging process has to start early.\n\n... | [] | [] | [
[]
] | |
mksz5 | why small businesses are considered "good" | I always hear about small businesses on the news and whatnot and they always say how we should put money into small businesses and support them. I've heard various reasons why they are good/important but I'd like a concise answer. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mksz5/eli5_why_small_businesses_are_considered_good/ | {
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"Ke... | [] | [] | [
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"census.gov",
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"http://www.census... | |
kefjc | Couple questions about planetary orbit. | I'm having a hard time figuring out how to write this w/o sounding less intelligent than I am, so bare with me please.
As a matter of fact I have no idea how to ask it. Here's a series of thoughts I've got.
Our moon always faces us in the same direction. That is, the dark side fo the moon, is always the dark side of ... | askscience | http://www.reddit.com/r/askscience/comments/kefjc/couple_questions_about_planetary_orbit/ | {
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"Tidal Locking.\n_URL_0_\n\nThe moon is tidally locked with the Earth, it is slowly getting farther and farther away and is in fact slowing down our days. It does spin on its own axis once per month. But since it revolves ar... | [] | [] | [
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5xawd4 | how do they declare certain aquatic organisms as extinct, when we haven't explored a huge majority of the oceans? | Apparently, we've only explored around [5%](_URL_0_) of the Earth's oceans. How do they declare some aquatic organisms to be extinct, when we don't know what lies in the unexplored regions?
> *Note that I'm talking about ancient and recent species here.* | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5xawd4/eli5_how_do_they_declare_certain_aquatic/ | {
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"The same way we do on land, really. It is basically the reasoning of 'if we haven't seen any trace of species X in a good number of years, most likely they are extinct.' Sometimes those assumptions are correct. sometimes they are very false. (Li... | [] | [
"http://oceanservice.noaa.gov/facts/exploration.html"
] | [
[]
] | |
2jmyvw | How does it happen that an entire volume of data can become corrupt when the writing of only a small portion of it is interrupted? | The other day, the electricity went out while I was saving a folder of word documents to a flash drive. When I powered it back up again, Windows told me that the drive was corrupt and needed a reformat. The flash drive is 16GB, and my documents were only a few megs. What happened that the entire drive became corrupt? | askscience | http://www.reddit.com/r/askscience/comments/2jmyvw/how_does_it_happen_that_an_entire_volume_of_data/ | {
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"In your case it seems was damaged the File Allocation Table (FAT). This file system can be read and written by a wide range of devices, but it is very fragile because of how data is arranged logically. In most cases you can fix the problem with a... | [] | [] | [
[]
] | |
28uils | how would half the gravity on earth, and in another scenario double the gravity on earth affect us in everyday life? also, could we survive without any gravity at all? | Let's say Earth had the gravity of Mars (38% of Earth's) and in another scenario had the gravity of Jupiter (2 1/2 times that of Earth's). How would this affect us in everyday life?
What if there was no Gravity on Earth, could we survive? What would be different?
I got turned down in /askscience so maybe I can get ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/28uils/eli5_how_would_half_the_gravity_on_earth_and_in/ | {
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"Not exactly an expert, but I'm an undergraduate Physics major:\n\nAssuming that Earth has ALWAYS had the gravitational attraction of Mars or Jupiter, it would affect us very little. Our bodies would have evolved along with all other life on Earth... | [] | [] | [
[]
] | |
1w12rs | Why is there virtually no outside sources for the Kingdom of Israel during the time of David & Solomon? | It is thought that the earliest mention of the people of Israel is in an Egyptian inscription of Pharaoh Merneptah (c.1200BCE), so some 200 years before the first king of the united monarchy, Saul. The text only makes passing reference to Israel as a group of people and probably located somewhere in the Palestinian reg... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1w12rs/why_is_there_virtually_no_outside_sources_for_the/ | {
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"Part of the answer is that most people stopped being interested in the area. The Egyptians gave up campaigns in the Levant around 1175 until Shoshenq around the early 900s (who is mentioned in 1 Kings 14 although some dispute this), and New Kin... | [] | [] | [
[]
] | |
4kn48c | if networks cancel a show mid-season and have filmed the rest of the season, why aren't the rest of the episodes released online? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4kn48c/eli5_if_networks_cancel_a_show_midseason_and_have/ | {
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awmwkv | Was homosexuality seen as normal in the middle east prior to 1885? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/awmwkv/was_homosexuality_seen_as_normal_in_the_middle/ | {
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"...kind of.\n\nNot \"homosexuality\" as we think of it today, though. That is to say, an outright sexual relationship between two adult men would not have been regarded as acceptable behavior. However, under certain limited circumstances same-ge... | [] | [] | [
[]
] | |
2v03mz | why was synth used so much in 80s music? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2v03mz/eli5_why_was_synth_used_so_much_in_80s_music/ | {
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"Simply put, because it was new, it became popular very fast, and people liked it.",
"Synthesizers became popular very quickly due to their marketed ability to 'create the sound... | [] | [] | [
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"http://www.vintagesynth.com/yamaha/yamaha_dx7_lg.jpg"
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g5la9 | How do colony species like ants and bees evolve to their present states? | With one queen and numerous drones (or workers), it seems counterintuitive to the evolutionary process somehow, as the diversity of genes is severely limited. | askscience | http://www.reddit.com/r/askscience/comments/g5la9/how_do_colony_species_like_ants_and_bees_evolve/ | {
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"The queen mates with drones from many different colonies. If you just consider that, genetically speaking, the colony is the organism, not the individual bee, there's no reason for there to be less div... | [] | [] | [
[],
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"http://books.google.com/books?id=ljxV4h61vhUC&lpg=PP... | |
28f1i8 | why is the us police force becoming more militarized and more powerful? or is this a misconception? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/28f1i8/eli5why_is_the_us_police_force_becoming_more/ | {
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"http://en.wikipedia.org/wiki/Occupy_movement",
"http://en.wikipedia.org/wiki/Jallianwala_Ba... | ||
627tzs | why does the us model of the samsung galaxy s8 have a different processor than the global model? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/627tzs/eli5_why_does_the_us_model_of_the_samsung_galaxy/ | {
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"text": [
"Qualcomm owns many many patents in the US basically forcing any company to use Qualcomm's modem to connect to wireless signals. Companies are free to use any SoC (System on a Chip) they want, the Galaxy S6 used the global SoC version but used a ... | [] | [] | [
[]
] | ||
9z5yc7 | how exactly does the us "cut someone off from the dollar market" with sanctions? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9z5yc7/eli5_how_exactly_does_the_us_cut_someone_off_from/ | {
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"The US tells banks that they cannot do business with \"someone\" if they want to do business with US regulated banks or the electronic funds transfer network. This doesn't exactly prevent them from spending dollars, but they have to do it with b... | [] | [] | [
[]
] | ||
7vxpf1 | animals with rabies live normally but infected people die in a week? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7vxpf1/eli5_animals_with_rabies_live_normally_but/ | {
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"Animals die from rabies too.\n\nPeople will show symptoms of rabies after being bitten anywhere from weeks to months. ",
"Animals with rabies typically *don't* live normally. ... | [] | [] | [
[],
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"http://www.who.int/mediacentre/factsheets/fs099/en/",
"https://www.youtube.com/watch?v=guYU1JDE_jM"
],
[]
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72a12w | Romance of the Three Kingdoms is one of the most famous works to come out of China, however it is not historically accurate. What is a historical description of Cao Cao, Liu Bei, et al.? | For example, one could see Cao Cao as a villain while Liu Bei was the hero, and this is because in the romance Liu Bei is simply the protagonist because he represents carrying on Han. But what is another understand in which we could see Cao Cao as being heroic and Liu Bei being villainess? What were they really like? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/72a12w/romance_of_the_three_kingdoms_is_one_of_the_most/ | {
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"text": [
"Add on-- which (if any) of the central generals that are not real. I.e. Did Lu Bu exist? Guan Yu? Zhang Fei? Sima Yi?"
]
} | [] | [] | [
[]
] | |
4zod1t | how does the acid in lead acid batteries not consume the lead? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4zod1t/eli5_how_does_the_acid_in_lead_acid_batteries_not/ | {
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"It does- in fact, that's how it works. It turns it into lead sulfate, and when all the lead has been so turned, the battery is dead. Charging a battery gradually turns the lead sulfate and water back into lead oxide and sulf... | [] | [] | [
[],
[]
] | ||
1k8600 | Do historians in the US/Europe study the south american independence wars and consequences? | I would like to no know if the subject is covered at all, considering it is my main field of study and I rarely see any question about the time period in this subreddit.
| AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1k8600/do_historians_in_the_useurope_study_the_south/ | {
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"Of course it is! One of the most known scholars of this period in Europe is Professor John Lynch, who is Emeritus Professor of Latin American History at the University of London. He's written several great books on the topic... | [] | [] | [
[],
[]
] | |
6aoqql | how come people say "drinking the kool-aid"when referring to cults? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6aoqql/eli5how_come_people_say_drinking_the_koolaidwhen/ | {
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"It's a reference to a famous cult that committed mass suicide by drinking poisoned Kool-Aid. (IDK if this is ... | [] | [] | [
[],
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"https://en.wikipedia.org/wiki/Jonestown"
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10joow | To what extent is the body able to heal deep lacerations and non-lethal bullet wounds? | I was rereading some comics today and noticed that the main character suffers many sword wounds to the body, including arrow holes. While damage to arms and legs may be non lethal, what is the recovery prognosis for muscle that has been severely slashed or tendons that have been scored? Can they heal back to full funct... | askscience | http://www.reddit.com/r/askscience/comments/10joow/to_what_extent_is_the_body_able_to_heal_deep/ | {
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"If the damage is too severe, then fibrosis is the mechanism of repair. And example is a muscle tear, usually called a strain. This is where muscle cells are torn apart, or there may be damage from a cut. In this case the body has to fill in the o... | [] | [] | [
[]
] | |
svjid | atlas shrugged | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/svjid/eli5_atlas_shrugged/ | {
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"Rand is generally disliked by Redditors but Atlas Shrugged is a great book and I would wager that at least 80% o... | [] | [] | [
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"http://www.reddit.com/r/explainlikeimfive/comments/svjid/eli5_atlas_shrugged/c4hbmk9"
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[... | ||
1kni2u | If I was standing on Phobos or Deimos, could I throw a ball fast enough to make it goes into orbit around the moon itself? | Not fast enough that it leaves the gravity of the moon altogether but fast enough that it orbits. | askscience | http://www.reddit.com/r/askscience/comments/1kni2u/if_i_was_standing_on_phobos_or_deimos_could_i/ | {
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"Phobos and Deimos have escape velocities of about 40 km/h and 20 km/h, respectively. The speed required for a circular orbit at surface level is (escape velocity)/sqrt(2), so 28 km/h and 14 km/h. That's well below the typical speed of a pitched b... | [] | [] | [
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"http://en.wikipedia.org/wiki/Hill_sphere"
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m7ex6 | why is it cold during summer further up north if over there the sunlight lasts longer? | I try to think of how earth would be positioned, and doesn't the fact that the day last longer somewhere mean that that part is actually closer to the sun? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/m7ex6/eli5why_is_it_cold_during_summer_further_up_north/ | {
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"The reason it's cold in the north, even in summer, is about the angle that the sunlight hits the earth. Far north the sun is in the sky for a long time but it never gets very *high* in the sky. In the far north the sun bar... | [] | [] | [
[],
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9qt0p2 | Why was the Black Sea historically a freshwater body? | This is a question that came up in an r/history thread ([here](_URL_0_)), where the explanation for the ship's preservation given is that the Black Sea is essentially a freshwater body with a saltwater cap. I know that similar meromictic compositions occur in other water bodies with poor internal circulation (e.g. Lake... | askscience | https://www.reddit.com/r/askscience/comments/9qt0p2/why_was_the_black_sea_historically_a_freshwater/ | {
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"The base level and salinity history of the Paratethyan basins (i.e. the Dacian Basin, Black Sea, Caspian Sea, and Aral Sea) is complicated to say the least. One flaw in the logic regarding these basins is the assumption that they are completely e... | [] | [
"https://old.reddit.com/r/history/comments/9qnhpf/worlds_oldest_intact_shipwreck_discovered_in/?utm_content=comments&utm_medium=hot&utm_source=reddit&utm_name=history"
] | [
[
"https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12177",
"https://www.sciencedirect.com/science/article/pii/S0031018215001583",
"https://www.sciencedirect.com/science/article/pii/S0025322716302961?via%3Dihub"
]
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33up1f | Can smells evolve over time? For example, do we know that a pineapple or our body odor has always smelled the same way? | I had this random as hell thought just now and thought if *anyone* can provide me with the answer, it's/r/askscience | askscience | http://www.reddit.com/r/askscience/comments/33up1f/can_smells_evolve_over_time_for_example_do_we/ | {
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"text": [
"Both your examples almost certainly have changed over time. Body odour for sure - different countries have different body odours due to diet and what comes out in sweat so that will definitely have changed as human diets changed. \nThe smell of ... | [] | [] | [
[]
] | |
1iestn | From the beginnings of the Republic until the fall of the Western Roman Empire, did Roman architecture change significantly and, if so, how? | For clarification: whilst I am interested in architectural changes that increased the utility of buildings, I am leaning more towards the visual aspects of architecture. We're all familiar with the Neoclassical style, but is this just represenative of one particular century/decade within or did the styles really not ev... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1iestn/from_the_beginnings_of_the_republic_until_the/ | {
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"Roman architecture is a HUGE topic - they tended to borrow bits and pieces from here and there (Etruscan arches, Greek columns...), and adapted their architecture depending on where in the Empire it was.\n\nThere's actually... | [] | [] | [
[
"http://oyc.yale.edu/history-art/hsar-252#sessions"
],
[]
] | |
2vh4f4 | would an oil heating system use more oil keeping a house a constant temperature all day or turning it off and bringing it back up to temperature? | I don't know how simple or complex of an answer this has. My wife and I keep our house at 70 degrees fahrenheit and have been turning the heater off during the day. When I get home from work the house is down around 55 - 60 degrees fahrenheit and often takes most of the evening to get back up to temperature.
Is turni... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vh4f4/eli5_would_an_oil_heating_system_use_more_oil/ | {
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"A lot depends on your home. The size, type of heating system, amount of insulation, how tight the house is all play a factor. With that being said, I can't ELI5 but I have a lot of experience in home building/home performance. It's what I do. ... | [] | [] | [
[]
] | |
2hi4hp | When did supermarkets first appear? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2hi4hp/when_did_supermarkets_first_appear/ | {
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"Various elements of the modern supermarket arose in different places, mostly in the 1920s.\n\nThe first self-service grocery store is thought to have been a Memphis Piggly Wiggly opened in 1916. The concept was patented and franchised to other o... | [] | [] | [
[]
] | ||
1oct4r | Was there a strong national identity for Israel before it was formed in 1947? | Israel is a fairly recent nation, which gave Jews a homeland for the first time in centuries. However, before Israel's formation, was there an Israeli national identity? Did Jews living in Palestine identify themselves as Israeli, or is the current Israeli national identity a byproduct of an Israeli state's existence? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1oct4r/was_there_a_strong_national_identity_for_israel/ | {
"a_id": [
"ccqtpq7"
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"score": [
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"text": [
"First of all Israel officially came into existence in 1948 when David Ben Gurion declared the birth of the country. \n\nNow to actually address your question. It is hard to get a perfect answer when it comes to this as the idea of an Israeli nati... | [] | [] | [
[]
] | |
38wrqb | How does the human body remain stable as we walk? | How is it that as we walk up and down the stairs we don't tip or fall over or have to go through time consuming process of balancing ourselves?
Thanks | askscience | http://www.reddit.com/r/askscience/comments/38wrqb/how_does_the_human_body_remain_stable_as_we_walk/ | {
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"text": [
"Walking is surprisingly an extremely complicated process when you look at all the system involved. Let me give you a brief walkthrough of the process.\n \nSo first you have your inputs: places where you body gets information before actually walk... | [] | [] | [
[]
] | |
1397l2 | i thought jordan had a constitutional monarchy, yet it appears that democratic movements have flaired up in the region. eli5 | I was under the assumption that king Abdullah had managed to avoid falling victim to the Arab spring by enacting economic and political reforms in recent years. Is this untrue, or are the revolutionary elements just extremely radical? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1397l2/i_thought_jordan_had_a_constitutional_monarchy/ | {
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"Good question. If you don't receive an adequate answer here in ELI5, you might try /r/middleeastnews or even /r/islam",
"Jordan does have a constitutional monarchy, and the king has been enacting d... | [] | [] | [
[],
[],
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40mqdt | Will you help me identify a snake? Pictures in comments. | _URL_0_
Location is southern Nicaragua just across the border with Costa Rica very close to the forest. I think its a boa, but am concerned it might be a type of pit viper. Any help is appreciated. Thanks | askscience | https://www.reddit.com/r/askscience/comments/40mqdt/will_you_help_me_identify_a_snake_pictures_in/ | {
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],
"text": [
"It's neither a boa nor a viper based on the head shape (too narrow/not triangle-shaped). That leaves the elapids and colubrids. I can't do much research on my phone, but the Lyre Snake (Trimorphodon) looks like the one. I'm ... | [] | [
"http://imgur.com/a/AhBUP"
] | [
[],
[]
] | |
355pik | why do i drive down the road and sometimes people flash their headlights once or twice before we pass? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/355pik/eli5_why_do_i_drive_down_the_road_and_sometimes/ | {
"a_id": [
"cr187jx",
"cr187p5",
"cr187ul",
"cr187y8",
"cr19bu8"
],
"score": [
7,
7,
2,
12,
5
],
"text": [
"There are cops behind them, don't do anything stupid.\n\nOr you are already doing something wrong, like not having your lights on at night.",
"Here in So... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
de9n3h | how does slag glass form? | How does slag glass come to be? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/de9n3h/eli5_how_does_slag_glass_form/ | {
"a_id": [
"f2u2zdp"
],
"score": [
2
],
"text": [
"Slag is a byproduct of metal refining. It's essentially impurities in the metal that are removed and is often kinda glassy. Originally slag glass had slag mixed into the glass to give it the appearance. However, later multiple colors of molten... | [] | [] | [
[]
] | |
5nudv5 | how do you build synthetic molecules? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5nudv5/eli5_how_do_you_build_synthetic_molecules/ | {
"a_id": [
"dcekkjh",
"dceyw9d"
],
"score": [
2,
2
],
"text": [
"The best way I can explain it is to think of going on a road trip. To get from A to B, there are several routes you could take. You want to stop at a particular tourist attraction on the way, so that eliminates some of the p... | [] | [] | [
[],
[]
] | ||
2yfcjs | landfill. surely it's a really really bad idea to fill holes with a partly rotting, gassy, mix of crap? won't we run out of places to put it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2yfcjs/eli5_landfill_surely_its_a_really_really_bad_idea/ | {
"a_id": [
"cp8z4l9",
"cp90zqx",
"cp9135b",
"cp93i5m"
],
"score": [
2,
3,
3,
3
],
"text": [
"The landfills here get filled over and then holes drilled in to the rubbish. Then they put pipes coming vertically out of the rubbish to vent the gas.\n\nSo I suppose in a few hund... | [] | [] | [
[],
[],
[],
[]
] | ||
q0jlq | linear alegbra: what the difference between linear independence and linear dependence is. | I have a test tomorrow and I feel that this is really essential. I can't figure it out :(:(
Thanks!
EDIT: it makes sense but now I need to grasp if a unique solution is linearly dependent or independent | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/q0jlq/eli5_linear_alegbra_what_the_difference_between/ | {
"a_id": [
"c3tq1vl"
],
"score": [
3
],
"text": [
"Let's say I give you a set of vectors. If any one of those vectors can be constructed as a combination of any of the others, then the set is said to be \"linearly dependent\". If the set isn't linearly dependent, we call it \"linearly independent... | [] | [] | [
[]
] | |
2vu2ib | what is mega doing? why do i have to wait forever twice? | I first have to wait for MEGA to start the download, and then it takes forever to download to my computer. What is going on here? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vu2ib/eli5what_is_mega_doing_why_do_i_have_to_wait/ | {
"a_id": [
"cokxv34"
],
"score": [
2
],
"text": [
"A lot of complicated encryption.\n\nRemember Megaupload? It was a site for hosting files on for download, based in New Zealand, much like Mega, but it was quicker. Unfortunately for them, US law deemed it illegal because it had lots of copyright-... | [] | [] | [
[]
] | |
3xevxt | why do the skeletons of people that died hundreds of years ago have perfect white teeth but mine will yellow within days without brushing? | I always thought it was strange that photos of ancient corpses or skeletons from (literally) ages ago are dug up by archaeologists and seem to have great teeth! And yet i have to brush twice a day and mouthwash to maintain "kinda" white teeth.. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3xevxt/eli5_why_do_the_skeletons_of_people_that_died/ | {
"a_id": [
"cy419tl",
"cy41alj",
"cy48h6v",
"cy4bfh8",
"cy4j2uy",
"cy4ks1i",
"cy502eh"
],
"score": [
14,
135,
6,
3,
6,
5,
2
],
"text": [
"Because those skeletons aren't maintaining an active bacterial culture in their mouth. Your mouth is warm and m... | [] | [] | [
[],
[],
[],
[
"http://qz.com/516672/ancient-romans-had-no-need-for-dentists-because-of-one-food-they-didnt-eat/"
],
[
"http://m.sciencefocus.com/qa/are-yellow-teeth-stronger"
],
[],
[]
] | |
4g3xka | Penrose diagrams for evaporating black holes? | I understand the purpose of penrose diagram to be an extension of Minkowski spacetime diagrams, but I am a bit confused on its addition of evaporating black holes. The diagram only shows the null future infinity and null past infinity on the right side of the diagram, the left side is cut off except for where it shows ... | askscience | https://www.reddit.com/r/askscience/comments/4g3xka/penrose_diagrams_for_evaporating_black_holes/ | {
"a_id": [
"d2exm9g"
],
"score": [
2
],
"text": [
"In Penrose diagrams, the horizontal coordinate is normally **radial**, so it goes from zero to infinity. The vertical axis is time, and each point corresponds to a spatial two-sphere at that given radius and time. For a given time, the left-most ... | [] | [] | [
[
"http://physics.oregonstate.edu/coursewikis/GGR/book/ggr/penrose"
]
] | |
3mgu1q | why doesn't america join russia fighting isis in syria on the ground? | Wonderful opportunity to build trust with Russia and challenge ISIS. Would be a dream _URL_0_ hardened Syrians with a new found confidence. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mgu1q/eli5why_doesnt_america_join_russia_fighting_isis/ | {
"a_id": [
"cvetdmf",
"cvets9g",
"cveu0hc"
],
"score": [
2,
8,
3
],
"text": [
"It's dirty fighting and I don't think any western country wants to get that deep just yet. It's very expensive, the largest cost being soldiers' lives.",
"* Russia is not fighting on the ground, the... | [] | [
"team..US/Russia/and"
] | [
[],
[],
[]
] |
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