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2gecm7 | if the smell of cut grass is a distress signal, what will the grass that receives the message actually do about it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2gecm7/eli5_if_the_smell_of_cut_grass_is_a_distress/ | {
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"The grass sends it's nutrients etc. to it's roots so that they won't go to waste and ... | [] | [] | [
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2ioon8 | how does the photo 51 of rosalind franklin show the evidence for a double stranded dna | I don't understand a lot of diffraction and all of that, but I would like to have some idea on how it shows that. Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ioon8/eli5_how_does_the_photo_51_of_rosalind_franklin/ | {
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"This page has an interactive walkthrough of the image explaining everything along the way:\n\n_URL_0_\n\nIt's not perfect but gives a decent understanding of it using simple terms.",
"The ELI5 is we understand the physic... | [] | [] | [
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9rr63a | ; it’s not the volts that kill you, it’s the amps? | Biology because that’s the closest I can think of, but wouldn’t a whole bunch of volts kill somebody pretty quick?
Edit: wow ok this blew up overnight, was not expecting this. So what seems to be the most common answer was that volts are the potential, amps are the potential being realized, the saying is wrong, and t... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9rr63a/eli5_its_not_the_volts_that_kill_you_its_the_amps/ | {
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75ywnb | Why did the Industrial Revolution begin in the UK and not elsewhere? I have seen several theories, including colonialism, natural resources, Protestantism, capitalism and the rule of law. Is there any historical consensus on this? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/75ywnb/why_did_the_industrial_revolution_begin_in_the_uk/ | {
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"No, there really isn't a complete consensus; there's even an entire group of people out there that believe it was a pure accident. But there is one very popular theory out there: Institutional Development Theory, which I take after.\n\nThe gener... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/75sw5z/with_3000_years_of_history_a_system_of_writing/"
]
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4hj8fs | How do self driving cars respond to traffic officers? | Are they able to understand the flow of traffic? What happens when they are confronted with this situation? | askscience | https://www.reddit.com/r/askscience/comments/4hj8fs/how_do_self_driving_cars_respond_to_traffic/ | {
"a_id": [
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"Most self driving cars right now have an actual driver in them whom can take control at any time. So this is not much of an issue.\n\nEdit- How will it work in the future? Implementing computer recognition of lights and sirens is no more difficul... | [] | [] | [
[]
] | |
afovjo | Other than learning from mistakes of past. Why would you say it is important for a person in the present times to know and understand history? I like history a lot, but I find myself unable to expose its relevance to uninterested people. How is it a useful or important knowledge? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/afovjo/other_than_learning_from_mistakes_of_past_why/ | {
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"Currently in college, I took on history because I needed those free As and now accidentally have 80% of a history degree, so if they need a GPA booster, learn history! /s\n\n & #x... | [] | [] | [
[],
[],
[],
[
"https://www.reddit.com/r/AskHistorians/comments/425mz1/why_should_i_study_history/"
]
] | ||
1a0zgs | how do you get into medical school in the united states? | I'm on my third engineering degree and someone was trying to explain to me how medical school works, from getting in to graduating. The actual process of graduating seems to be straightforward, but they seemed deeply confused by the whole admissions process. Is there some sort of algorithm here? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1a0zgs/eli5_how_do_you_get_into_medical_school_in_the/ | {
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"There are certain required courses which you must complete in college. If you haven't done them, you can't get into med school.\n\nAfter that, the most important factors are your grades and your score on a standardized test ... | [] | [] | [
[],
[]
] | |
13w125 | if a muslim was on the exact opposite side of the earth from mecca, where would they turn to pray? | They'd probably be on a boat...idk where the opposite is. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/13w125/eli5_if_a_muslim_was_on_the_exact_opposite_side/ | {
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"They would probably move a bit.",
"It would indeed be in the ocean. _URL_0_\n\nIn that case they would simply ... | [] | [] | [
[],
[
"http://www.antipodemap.com/"
],
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"http://www.wolframalpha.com/input/?i=21°+25%27+48%22S%2C+140°+10%27+48%22W+to+Mecca%2C+Saudi+Arabia",
"http://en.wikipedia.org/wiki/Great_circle",
"http://www.wolframalpha.com/input/?i=antipode+of+Mecca%2C+Saudi+Arabia",
"http://www.qibla.com.br/"
... | |
5nuaps | What did those in the English speaking world in the Victorian era consider "spooky" architecture? | Today, when someone mentions a "spooky" or "scary" looking house one often imagines an old Victorian house with wrought iron fencing, overgrown lawns, etc. A google image search of "haunted house" turns up many, many "scary" Victorian houses.
Did people in the English speaking world in the Victorian era look at, say, ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5nuaps/what_did_those_in_the_english_speaking_world_in/ | {
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"Decay and decrepitude are kind of universal - I can give a couple of examples from opposite ends of the Victorian era (1837-1901):\n\n > I looked upon the scene before me—upon the mere house, and the simple landscape features of the domain—upon ... | [] | [] | [
[
"http://www.gutenberg.org/files/345/345-h/345-h.htm",
"http://www.ibiblio.org/julesverne/books/20t.htm",
"http://www.gutenberg.org/ebooks/10897",
"http://www.gutenberg.org/files/932/932-h/932-h.htm"
]
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j2eu9 | can someone explain general relativity? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/j2eu9/can_someone_explain_general_relativity/ | {
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"I'm not an expert on this, but I'm pretty sure you could sum it up like this:\nIt's basically a theory that explains gravity & it's effects on space, time, matter, etc.\nFor exam... | [] | [] | [
[],
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] | ||
oul1n | Why is my non-dominant hand/arm able capable of doing some things and not others? | As in, I cannot throw a ball, write, cut, etc with my left hand but I am able to move up and down a fret board, manipulate strings on a guitar. Playing baseball, I can position my left hand/arm in the right place to catch or stop the ball. Even playing games like Battlefield, I can control three different functions (Ai... | askscience | http://www.reddit.com/r/askscience/comments/oul1n/why_is_my_nondominant_handarm_able_capable_of/ | {
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"text": [
"This isn't an answer but just a semi-relevant tangent. I've tried to teach myself to do more with my left (off) hand over the years and some things come easily while others don't. Certain other tasks ha... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Muscle_memory#Movement_and_motor_learning"
],
[]
] | |
73ppqq | how does physics work in calculus? | What exactly does calculus do to physics? Say we have a simple equation like Force=mass*acceleration. The second derivative means acceleration. So if you take the second derivative of Force what would it be and what does it mean? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/73ppqq/eli5how_does_physics_work_in_calculus/ | {
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"Acceleration is the second derivative of displacement with respect to time. The second derivative of force with respect to time isn't all that meaningful. I'm... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/Jounce"
],
[],
[]
] | |
2szseo | why do dogs cock their heads when their begging for something? | Is it just canine body language, or something more sinister? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2szseo/eli5_why_do_dogs_cock_their_heads_when_their/ | {
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"There are a few theories on why they do this.\n1. They're trying to hear better\nDogs have movable earflaps that help them locate the source of a sound, but they also have brains that can compute time differences between the sound reaching each e... | [] | [] | [
[]
] | |
aarlw2 | what will happen to the 0.1% of the germs that didn't get killed by the hand sanitizer? | Do the 0.1% of the germs get sick? Do they function properly like nothing happened? I honestly don't know. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aarlw2/eli5_what_will_happen_to_the_01_of_the_germs_that/ | {
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"text": [
"Those that survive will often pass on this genetic advantage to their offspring, which will then be slightly more resistant and so on...This is natural selection and evolution in action. Bacteria and viruses have already evolved/mutated in respon... | [] | [] | [
[]
] | |
8qypz4 | Can a fathers abuse of alcohol affect the number of dopamine receptors in their child? | My father told me the reason he doesn’t show his emotions as much as I do, is because my grandfather was an alcoholic and due to this, my father was born with less dopamine receptors than normal.
I’m skeptical of this, but I don’t want to directly call him out. Is there any truth to what he is saying? | askscience | https://www.reddit.com/r/askscience/comments/8qypz4/can_a_fathers_abuse_of_alcohol_affect_the_number/ | {
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"text": [
"Don't call him out. There may be a genetic connection to dopamine production or uptake; I can't really speak to that because I'm a total noob to neuroscience (sorry!). However, the effects of growing up as a child of an alc... | [] | [] | [
[],
[]
] | |
2zstj2 | why does music in 4/4 time sounds more natural to us? | Is there a reason why weirder time signatures sound a bit more strange other than we are used to listening to simpler ones? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2zstj2/eli5_why_does_music_in_44_time_sounds_more/ | {
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"Pa... | [] | [] | [
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... | |
4tqhd2 | why has there recently been an increase in ultra-nationalism? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4tqhd2/eli5_why_has_there_recently_been_an_increase_in/ | {
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"Financial downturns always push populaces to the right.\n\n1. Have less money.\n2. Suffer... | [] | [] | [
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jln8p | the fed and why people like it and dislike it | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/jln8p/eli5_the_fed_and_why_people_like_it_and_dislike_it/ | {
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"text": [
"People dislike the federal reserve because they make money out of thin air every year which causes all of our money to decrease in value. This is much like a hidden tax on your currency on top of the taxes you already pay, a... | [] | [] | [
[],
[]
] | ||
acp2ic | How will the historian of the future sift through the billions of primary sources offered by the digital age? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/acp2ic/how_will_the_historian_of_the_future_sift_through/ | {
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"That's a great question. Short answer: digital sources are readily handled by digital tools. While the amount of digital information is growing rapidly, the power of the tools we have for examining this information is already powerful, and it's... | [] | [] | [
[
"https://www.loc.gov/item/prn-03-142/",
"https://archive.vn/20121220045142/https://stadsarchief.amsterdam.nl/english/archives_database/overzicht/735.en.html",
"https://www.albany.edu/history/history590/",
"https://www.fayard.fr/histoire/talleyrand-9782213630939",
"https://www.jstor.org/stable/... | ||
1m95vj | why do shark cages have gaps in them, which look big enough for sharks to fit through? | Can sharks actually make their way through these gaps? Or do they have some sort of aversion to tight spaces? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1m95vj/eli5_why_do_shark_cages_have_gaps_in_them_which/ | {
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"Could be because most dangerous sharks are still too big to get in. Could also be that if a dangerous shark did get in, the diver could escape.\n\nEdit: I found a video in which a man uses the gap on the side to escape _UR... | [] | [] | [
[
"http://www.youtube.com/watch?v=50dVhd4dmp8"
],
[]
] | |
1spae4 | How exactly do scholars decipher an unknown writing system? | When I see something about an 'undeciphered' writing system, it talks about how scholars can break the code or whatever. Like the Voynich Manuscript has been analyzed by codebreakers and cryptogrophers. How exactly would that help decipher the writing system/language? | askscience | http://www.reddit.com/r/askscience/comments/1spae4/how_exactly_do_scholars_decipher_an_unknown/ | {
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"text": [
"There are many ways. One of them, and probably the ideal case, is if you find a document where the same text is written in several different languages and scripts. The best example of that is the Rosetta Stone.\n\n_URL_0_",
... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Rosetta_Stone"
],
[]
] | |
91ddf4 | At what stage is cryonics and medicine at where a cryopreserved human body could be resuscitated? | Is this something that could be done within the current generation or are we looking much further into the future (if ever)? | askscience | https://www.reddit.com/r/askscience/comments/91ddf4/at_what_stage_is_cryonics_and_medicine_at_where_a/ | {
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"Anhydrobiosis is a technique used naturally by living organisms to survive in a desiccated (dry) state. Surviving the extreme cold uses the same techniques, as it all boils down to preserving the lipid bilayers that make up cell membranes.\n\nO... | [] | [] | [
[
"https://i.imgur.com/e6BVvbJ.jpg"
]
] | |
2e1u6u | How is dry ice made? | askscience | http://www.reddit.com/r/askscience/comments/2e1u6u/how_is_dry_ice_made/ | {
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"text": [
"Carbon dioxide is generated via chemical process\n\nThe gas is pressurized and refrigerated until it becomes liquid\n\nPressure is reduced, causing some of the liquid to vaporize\n\nVaporized carbon dioxide freezes the remai... | [] | [] | [
[],
[]
] | ||
45uyjv | why does usb have fewer reliability issues than older interfaces? | NES cartridges are famous for their unreliable connections. We've seen people blowing on them to get games working. Also, I've had experience with (relatively speaking) more recent consoles like the DS or Gameboy having intermittent issues (needing to be re-inserted) as well. On the other hand, I still have USB devices... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/45uyjv/eli5why_does_usb_have_fewer_reliability_issues/ | {
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4,
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"text": [
"Not an engineer or anything, but i'm pretty sure that NES and other cartridges used many like 20+ connections. the more connections there are the more likely one or more of them ... | [] | [] | [
[],
[],
[],
[]
] | |
7apbrs | why every storm we get the radar shows it moving one way but the wind blows the opposite? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7apbrs/eli5_why_every_storm_we_get_the_radar_shows_it/ | {
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"You’re probably feeling the inflow feeding into the storm. Inflow winds will blow toward the storm system and be fairly warm. Outflow winds will be colder (rain cooled) and blow away from the storm. ... | [] | [] | [
[],
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18vrg9 | in islamic countries, how are women who wear a face veil identified for official purposes? | There's a lot I don't understand here, not least how they identify each other in everyday situations. But what about getting a passport, visiting a prison, getting a library card, getting a driver's license (not relevant in ~~Iran~~ Saudia Arabia (thanks to buried_treasure) I know), passing through airport security or ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/18vrg9/in_islamic_countries_how_are_women_who_wear_a/ | {
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"c... | [] | [
"http://i.telegraph.co.uk/multimedia/archive/01428/Burqa_1428680c.jpg",
"http://en.wikipedia.org/wiki/Islam_and_clothing",
"http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Woman_in_burqa%2C_Aleppo.jpg/496px-Woman_in_burqa%2C_Aleppo.jpg",
"http://mythousandtrinkets.weebly.com/uploads/7/1/2/6/7126647/7... | [
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2lfujj | how does net neutrality continue to be threatened through legislation? haven't we already shot this down? | In reference to a [recent guardian article](_URL_0_). I feel like every few weeks net neutrality is being threatened. Don't courts say "yeah, we've already been through this" and put it down automatically? Something, something, legal precedent. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2lfujj/eli5_how_does_net_neutrality_continue_to_be/ | {
"a_id": [
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"text": [
"Unfortunately, there's no \"double jeopardy\" on bad legislation. They can try and try and try to pass it as long as they want.",
"It's not enforceable I don't think. Plus, the big companies that push for these bills to... | [] | [
"http://www.theguardian.com/technology/2014/nov/05/net-neutrality-protest-hybrid-fcc-solution"
] | [
[],
[]
] | |
11uohv | Why would someone be listed as a "Slave" in a 1910 US census? | We've been doing some genealogy research and it turns out in 1910 our family had a lodger who lists his occupation as "Slave". This is in New Jersey long after slavery had been abolished. We do know that our family owned a farm and commonly employed migrant workers and they would have often lived with them for a few w... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/11uohv/why_would_someone_be_listed_as_a_slave_in_a_1910/ | {
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"Here is my thought: the constitution bans slavery except as punishment. It is possibl... | [] | [] | [
[],
[],
[],
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"http://www.germanroots.com/census.html",
"http://americanhistory.about.com/od/civilwardocument/ig/Civil-War-African-Americans/African-American-Contrabands.htm"
],
[],
[],
[],
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] | |
8mstu1 | how does fat in the body create more flesh? | And when you lose weight how does the extra flesh vanish? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8mstu1/eli5_how_does_fat_in_the_body_create_more_flesh/ | {
"a_id": [
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"text": [
"You have dedicate fat cells that are specialized in storing energy as fat. To if you eat more food that you need you can stor it as fat in those cells.\n\nIf you eat food with less calories then you need you start to remove the fat from the cells... | [] | [] | [
[]
] | |
2fb011 | Is there a substance that burns with a flame cold enough to touch? | askscience | http://www.reddit.com/r/askscience/comments/2fb011/is_there_a_substance_that_burns_with_a_flame_cold/ | {
"a_id": [
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"text": [
"The only reason that fire is fire, is because the chemical reaction is powerful enough to emit light(via electrons moving up and down specific orbits.) If you were to suppose a similar reaction, like oxidation of iron in the... | [] | [] | [
[],
[
"http://www.reddit.com/r/askscience/search?q=cold+flame&restrict_sr=on&sort=relevance&t=all"
]
] | ||
4azd1j | what the scientific meme is? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4azd1j/eli5_what_the_scientific_meme_is/ | {
"a_id": [
"d14rjnr"
],
"score": [
2
],
"text": [
"Are you talking about the Sociological concept of a meme? Well essentially it's a thought virus, a concept that quickly spreads from person to person. Most cultural norms would be considered memetic in nature."
]
} | [] | [] | [
[]
] | ||
v6n5q | "The [Ku Klux] Klan in some areas of the country tried to be a means of reform, fighting the decline in morality and using the symbol of the cross... In some communities it achieved a certain respectability as it worked with politicians." How accurate is this statement from a history textbook? | Obviously the KKK is best known nowadays for lynchings and cross-burnings in silly white robes, led by officials with funny titles, but it seems like it would have had to do some sort of public service on the side in order to get as much visibility and influence as it had. What would your friendly local Klansmen actual... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/v6n5q/the_ku_klux_klan_in_some_areas_of_the_country/ | {
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],
"text": [
"It depends on the context. What else does the text say on the Klan? Because they undoubtedly did have a measure of respectability (if having local politicians as members is a sign of respectability), they did use the symbol ... | [] | [
"http://www.talk2action.org/story/2012/6/17/9311/48633"
] | [
[],
[]
] | |
6ky2jn | Worth your salt? From my understanding salt was worth more then gold at one point in time. If that's the case then how come people used to "salt the Feild's" of there enemy's wouldn't that be a cost prohibitive measure? Also couldn't they just boil down sea water to produce salt? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6ky2jn/worth_your_salt_from_my_understanding_salt_was/ | {
"a_id": [
"djppbtk"
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"score": [
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"text": [
"Hi, not discouraging further answers here, but meanwhile, you may be interested in a few previous posts on salt\n\nSalt vs gold\n\n* [Why was salt so important in trade? Was it ever \"worth its weight in gold\"?](_URL_0_)\n\n* [Why was salt so ex... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3pnjcq/why_was_salt_so_important_in_trade_was_it_ever/",
"https://www.reddit.com/r/AskHistorians/comments/3hd4rw/how_effective_was_literal_salting_of_the_earth/",
"https://www.reddit.com/r/AskHistorians/comments/5opntw/why_was_salt_so_scarce_and_valuabl... | ||
7l9uro | Why do LEDs sometimes appear to "bounce" (e.g. if you chatter your teeth)? | I realize this may not happen for everyone, but I have noticed for years that, when looking at LEDs (such as an old clock radio or LED holiday lights), if I chatter my teeth the lights appear to "bounce" in my vision. This does not occur for other sources of light as far as I have noticed, or at least certainly not to... | askscience | https://www.reddit.com/r/askscience/comments/7l9uro/why_do_leds_sometimes_appear_to_bounce_eg_if_you/ | {
"a_id": [
"drkuxkn",
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"score": [
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],
"text": [
"I suspect that the main effect is due to changes in processing at low-light levels (e.g. holiday lights in the dark) and the relative brightness of the lights. In low-light, there is more blurring (i.e. spatial pooling) of l... | [] | [] | [
[],
[]
] | |
co7azr | what happens in the brain when you decide to move a hand or leg? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/co7azr/eli5_what_happens_in_the_brain_when_you_decide_to/ | {
"a_id": [
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"score": [
13,
3
],
"text": [
"It is a VERY long answer in reality, but I'll try to make it short. Your brain sends signals from the zones that are responsible for initiating movement to the muscles needed. It generates this signal based on various infor... | [] | [] | [
[],
[]
] | ||
4as22c | the situation in brazil right now. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4as22c/eli5_the_situation_in_brazil_right_now/ | {
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"d131poe",
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"text": [
"Okay.\n\nBrazil's economy is really bad right now. The public are blaming corruption at the federal level. President Dilma Rousseff is being accused of altering the countries financial records to make Brazil look less in eco... | [] | [] | [
[],
[]
] | ||
3itapo | why are some people so smart without even trying? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3itapo/eli5why_are_some_people_so_smart_without_even/ | {
"a_id": [
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21,
4,
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"text": [
"I think there was some study about this saying that the brains in smarter individuals actually process information at a faster rate th... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
4p6wzq | Are plant cells significantly more or less succeptible to radiation damage than animal cells? Also, how does damage typically manifest - do plants get cancer? | askscience | https://www.reddit.com/r/askscience/comments/4p6wzq/are_plant_cells_significantly_more_or_less/ | {
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"text": [
"I don't know about the radiation part, but the pathogenic bacterium Agrobacterium tumefaciens causes something like cancer in trees. Crown gall disease. One big difference between plant and animal cance... | [] | [] | [
[],
[
"http://pubs.acs.org/doi/abs/10.1021/pr900034u",
"http://www.ncbi.nlm.nih.gov/pubmed/11567888"
],
[]
] | ||
5nkeit | How can I read history on Wikipedia in a responsible way, knowing what is useful information and what to be skeptical of? | I suppose this would apply to reading any tertiary source as well. Put another way, what are the challenges of critical thinking and reading that are unique to history, as opposed to, say, sociology or economics, if any? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5nkeit/how_can_i_read_history_on_wikipedia_in_a/ | {
"a_id": [
"dcceu71"
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"text": [
"As far as wikipedia goes, and I am thinking mostly of my subject area, one of the pitfalls is the extremely dated nature of many of the tertiary sourced used- or sometimes their inappropriate usage: miscitations, misuses, or misappropriations- ge... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Franco-Tahitian_War"
]
] | |
1k3g1h | how is the universe constantly expanding when there is no edge? | I have heard explanations before but still never really got my head fully around it. How can there be no edge (it be infinite) and still be expanding? how can it expand on infinity? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1k3g1h/eli5_how_is_the_universe_constantly_expanding/ | {
"a_id": [
"cbkyx5t"
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],
"text": [
"The space between two points grows. Literally the space between them. It's not expanding *into* anything, and therefore the edge of space never becomes an issue.\n\nThe space between the Milky Way and the next Galaxy (in this case, Andromeda) li... | [] | [] | [
[]
] | |
mixtb | how do escort ads still exist and how are they not all set ups? | I heard something on NPR not too long ago about backpage still having an escort section and I'm confused how they could even operate one. Would law enforcement just bait and hook all ads and how is that even legal to have those ads in the first place? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mixtb/how_do_escort_ads_still_exist_and_how_are_they/ | {
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2,
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"text": [
"A fo... | [] | [] | [
[],
[],
[],
[],
[],
[
"http://www.yellowpages.com.au/search/listings?region=australia&showAllLocations=false&headingCode=18058&includeSurroundingSuburbs=false&referredBy=www.yellowpages.com.au&selectedViewMode=list&surroundingSuburbsModifiedByUser=false&sortBy=mostInfo&... | |
24zw90 | why isn't there a list of ingredients on a pack of cigarettes, when it seems like anything else you buy has that information on their products? | I mean there is sugar in some cigarettes. Shouldn't there be a nutrition label on it as well? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/24zw90/why_isnt_there_a_list_of_ingredients_on_a_pack_of/ | {
"a_id": [
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"text": [
"There are labels in Canada...",
"Same reason there isn't an ingredients list on beer (assuming you're asking about the US). Food is regulated by the Food and Drug Administration, under the Departme... | [] | [] | [
[],
[],
[]
] | |
u1yi3 | If humans evolved different colored skin from living in different climates, will skin colors change to some equilibrium now that people of all races live in the same areas? | askscience | http://www.reddit.com/r/askscience/comments/u1yi3/if_humans_evolved_different_colored_skin_from/ | {
"a_id": [
"c4roymt",
"c4rp1zc",
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"score": [
8,
38,
8
],
"text": [
"The previous Answers are incorrect. Look up Hardy-Weinberg equilibrium. Without pressure to remove the variation allelic frequencies remain stable. \n\n[Wikipedia Link](_URL_0_)\n",
"We're not one ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Hardy-Weinberg"
],
[],
[]
] | ||
bdmzgc | how is it that your veins/arteries don't simply cut off whenever you sit or compress the body in normal circumstances? | When you sit, what makes it so that our veins/arteries don't just immediately close under the pressure of your weight? Like a hose being cut off by someone standing on it. I understand that there is blood pressure, but is the heart really that powerful to create pressure that can suspend the veins/arteries enough for b... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bdmzgc/eli5_how_is_it_that_your_veinsarteries_dont/ | {
"a_id": [
"ekzd04p",
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"score": [
4,
3
],
"text": [
"For the most part veins and arteries are not on the surface so simply sitting won't compress them enough to \"cut off\" flow, but it can be significant enough to reduce flow to the point your leg \"goes to sleep\" , also why... | [] | [] | [
[],
[]
] | |
1ox1qu | How was the food on columbus' ship and other jouneys that span over several months? | I imagine the food would get rotten after a while.
Did they have living animals onboard? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ox1qu/how_was_the_food_on_columbus_ship_and_other/ | {
"a_id": [
"ccwhc82"
],
"score": [
3
],
"text": [
"The food carried aboard ship varied a bit between nations and years. I don't have my books handy right now to find out exactly what the Spanish would have provisioned their ships with, but the recurring elements across the board are salt meat(oft... | [] | [] | [
[]
] | |
24m6mu | When and why did commissioning art die as a cultural concept? (ie. if I go to a museum it feels like 80% of art older than one century was a commission and only 1% of art made within the last 50 years was a commission) | I have looked into the concept quite a lot as I have a company in the area and have my own "theories" as to what killed it but I would rather know why it actually went away then stick with the made up reasons I came up with.
Even just pointing me to something I could read on the topic would be incredibly helpful. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/24m6mu/when_and_why_did_commissioning_art_die_as_a/ | {
"a_id": [
"ch8kjm2"
],
"score": [
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"text": [
"In NYC, 1% of commercial real estate budgets above some threshold must be allocated for the commission of art projects. I know nothing of the rest of the world but this is how it works here......_URL_0_ \n"
]
} | [] | [] | [
[
"http://www.nyc.gov/html/dcla/html/panyc/faq.shtml"
]
] | |
55nfvu | p-hacking and how to detect it? | _URL_0_
> look for “p-hacking” by examining the distribution of p-values in the included studies
How does that work?
What is p-hacking? How and why do researchers do it? How can authors of meta-analyses detect it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/55nfvu/eli5_phacking_and_how_to_detect_it/ | {
"a_id": [
"d8c17u3",
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"score": [
2,
3,
2
],
"text": [
"The [paper that coined the term p-hacking](_URL_0_ ) is online, and an interesting read.\n\nTL;DR: P-hacking is the use of data mining to find patterns in data that can be presented as statistically sig... | [] | [
"http://slatestarcodex.com/2014/04/28/the-control-group-is-out-of-control/"
] | [
[
"http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1002106"
],
[
"https://xkcd.com/882/"
],
[
"https://en.wikipedia.org/wiki/Statistical_hypothesis_testing"
]
] | |
3i3upw | Is there any evidence of a slave trade in Eastern European and Asian countries? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3i3upw/is_there_any_evidence_of_a_slave_trade_in_eastern/ | {
"a_id": [
"cudhoey"
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"score": [
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"text": [
"Sure, there’s plenty of evidence.\n\nLet’s just look at the history of Tartar slave raids amongst the Russians, only in the period after the Russians began gaining independence from the Mongol and Tartar steppe hordes. (There was plenty of slavi... | [] | [] | [
[
"http://www.xenophon-mil.org/rusarmy/streltzi.htm",
"http://www.historyatlas.narod.ru/russia_eng/east_eur1462en.gif",
"http://mapwalk2013.clevelandhistory.org/great-stand-on-the-ugra-river/",
"http://www.prlib.ru/en-us/History/Pages/Item.aspx?itemid=315",
"http://www.pravoslavie.ru/english/474... | ||
2xrqsk | why is honey and lemon good for singers when it never gets near the vocal cords? | or any fluid for that matter. if it bypasses our throat (and it does) how is lemon and honey going to have any effect whatsoever?
Water I understand as it hydrates from inside. But honey and lemon? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xrqsk/eli5_why_is_honey_and_lemon_good_for_singers_when/ | {
"a_id": [
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"score": [
15,
4,
14
],
"text": [
"Not sure what the honey does, but lemon water helps cut the phlegm in my throat. Makes it so I can sing without rattling or hitching.",
"Lemon is an astringent, in small amounts it will help clea... | [] | [] | [
[],
[],
[]
] | |
5mrffe | Why are certain planes used in specific areas during WW2 | What was the purpose of using different planes in different areas during wars? An example would be Corsairs being used on the Pacific front, while Mustangs and Thunderbolts were used in Europe. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5mrffe/why_are_certain_planes_used_in_specific_areas/ | {
"a_id": [
"dc69he3"
],
"score": [
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"text": [
"Note, this answer largely deals with the Americans. Of the major warring powers, the US had the most extensive and far-flung aerial operations. And for clarity's sake Pacific Theater (PTO) and European Theater (ETO) speaks for these theaters in t... | [] | [] | [
[
"http://www.ozatwar.com/swpa.jpg",
"http://www.ladybegood.net/",
"http://bathead.com/noseart5.html"
]
] | |
14logq | I just bought a re-usable toy hand warmer for my son that works by "clicking" a small metal clip inside the sachet of clear liquid. The liquid turns opaque in an instant and the sachet becomes warm. How does it work? | .. or to be more precise - the sachet is "recharged" by placing it in hot water. Eventually the white crystals dissolve and the liquid returns to it's clear state so the process can be triggered again (up to around 10 times apparently). Is the energy from the hot water somehow being stored in the liquid and then releas... | askscience | http://www.reddit.com/r/askscience/comments/14logq/i_just_bought_a_reusable_toy_hand_warmer_for_my/ | {
"a_id": [
"c7e81pg",
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"score": [
75,
3
],
"text": [
"The sachet is filled with a supersaturated solution of [sodium acetate](_URL_0_). By clicking the metal clip, you're providing a nucleation site for crystals to form. Since the crystallization of sodium acetate is quite exo... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Sodium_acetate"
],
[]
] | |
2cs7uz | Universal expansion: movement in space or movement of space? | I've been reading about fundamental forces, vacuum pressure, dark energy and the slowing, then acceleration of the expanding universe and my head is done in.
According to Wikipedia, the big bang set all matter on an inertial trajectory consistent with the equivalence principle. This implies movement through space (... | askscience | http://www.reddit.com/r/askscience/comments/2cs7uz/universal_expansion_movement_in_space_or_movement/ | {
"a_id": [
"cjignkw",
"cjijsnc"
],
"score": [
37,
3
],
"text": [
"Not movement at all. Space is *added* between objects. (what you'd call movement of space, I guess).\n\nWhen we talk about accelerated expansion or gravitational collapse, what we mean is that the rate at which space is *ad... | [] | [] | [
[],
[]
] | |
il3cc | How *exactly* did the dinosaurs die out? Why did the mass extinction target some types of animals (dinos) but not others (mammals, fish)? | I understand that the asteroid hypothesis is the most accepted one. But what exactly about the asteroid killed all of them? Did the dust block out the sun, kill out all the plants, and the dinosaurs that depended on them therefore die out? If that's so, why do we still have plants...and mammals, fish, insects, etc? ... | askscience | http://www.reddit.com/r/askscience/comments/il3cc/how_exactly_did_the_dinosaurs_die_out_why_did_the/ | {
"a_id": [
"c24m8e2",
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"score": [
7,
7,
6,
2,
2
],
"text": [
"I think there's still a lot of debate about many of these questions you raise. And some of them might be impossible to answer - 65 million years ago was a lo... | [] | [] | [
[],
[
"http://www.lpi.usra.edu/science/kring/epo_web/impact_cratering/Chicxulub/Chicx_title.html",
"http://www.ucmp.berkeley.edu/education/events/cowen1b.html",
"http://dinosaurs.about.com/od/dinosaurextinction/a/meteorite.htm",
"http://en.wikipedia.org/wiki/Cretaceous–Tertiary_extinction_event",
... | |
coxf6d | what’s hpv and how does it differentiate from herpes | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/coxf6d/eli5_whats_hpv_and_how_does_it_differentiate_from/ | {
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"ewls3mk",
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"score": [
6,
5,
6
],
"text": [
"Hpv is a skin virus that typically causes warts. Most people have hpv at various places on their body occasionally throughout their life. One type causes genital warts which is an std. herpes is a disea... | [] | [] | [
[],
[
"https://en.m.wikipedia.org/wiki/Herpes_simplex",
"https://en.wikipedia.org/wiki/Human_papillomavirus_infection#Vaccines"
],
[]
] | ||
6c7tfi | is there a highest temputare the human body can feel? | can the human body tell the difference between a 1000 degree flame and a 1001 degree flame, and than a 1002 degree flame? Also is there a max temperature in total where after that you won't feel any more pain no matter how hot the fire is? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6c7tfi/eli5_is_there_a_highest_temputare_the_human_body/ | {
"a_id": [
"dhsl7lb",
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"score": [
3,
3,
2
],
"text": [
"Well first, I don't think someone would notice the slight change of temperature. It's like feeling the difference between 73 degrees and 74 degrees but hotter. Also the heat would start to burn your ski... | [] | [] | [
[],
[
"http://www.cis.rit.edu/people/faculty/montag/vandplite/pages/chap_3/ch3p1.html"
],
[]
] | |
2t18qe | how can lg and samsung produce amoled or oled screens for phones with great resolutions for relatively low price but can't do the same for tvs? | Basically, phone screens cost around 200-300 USD. Considering TV resolutions and panel technologies, TV's should have been cheaper with the same resolutions but they are not. Why is that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2t18qe/eli5how_can_lg_and_samsung_produce_amoled_or_oled/ | {
"a_id": [
"cnuun83"
],
"score": [
2
],
"text": [
"The manufacturing process doesnt scale up easily, is the short of it"
]
} | [] | [] | [
[]
] | |
e5cc5m | why is it so much more difficult to chug cold water vs room temperature? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/e5cc5m/eli5_why_is_it_so_much_more_difficult_to_chug/ | {
"a_id": [
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"text": [
"Ik for me the cold water can make my teeth hurt and kinda gives my mouth and throat a sort of \"brain freeze\".",
"Because it will make your mouth and throat cold and the human body doesn’t like that?"
]
} | [] | [] | [
[],
[]
] | |
6j4ztd | What makes electronic money officially money? Why can't people forge electronic money? | askscience | https://www.reddit.com/r/askscience/comments/6j4ztd/what_makes_electronic_money_officially_money_why/ | {
"a_id": [
"djbmuge",
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"score": [
45,
51,
6
],
"text": [
"If by electronic money you mean cryptocurrencies I will try to answer. The Bitcoin paper solves an important problem in computer science called \"the Byzantine generals problem\", which aims to achiev... | [] | [] | [
[],
[],
[]
] | ||
12o417 | Monday Mish-Mash | The Human Body | Previously:
- [Ships and Sea Travel](_URL_0_)
- [Historic Firsts and Lasts](_URL_2_)
- [History on Film](_URL_9_)
- [Historians](_URL_11_)
- [Naval Warfare](_URL_3_)
- [Fakes, Frauds and Hoaxes](_URL_6_)
- [Weaponry](_URL_4_)
- [Historical Fiction](_URL_1_)
- [World War II](_URL_8_)
- [Crime and Criminals](_U... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/12o417/monday_mishmash_the_human_body/ | {
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"I was mentioning to a friend earlier today how everyone has heard of... | [] | [
"http://www.reddit.com/r/AskHistorians/comments/129x3e/monday_mishmash_ships_and_sea_travel/",
"http://www.reddit.com/r/AskHistorians/comments/z2vaz/thursday_focus_historical_fiction/",
"http://www.reddit.com/r/AskHistorians/comments/11wbeu/monday_mishmash_historic_firsts/",
"http://www.reddit.com/r/AskHistor... | [
[
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[],
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"http://claygrl.files.wordpress.com/2009/02/treadle.jpg?w=500&h=413"
],
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"http://books.google.com/books?id=6YEuz3t8i6EC&printsec=frontcover&source=gbs_ge_summary_r&cad=... | |
4a57v9 | When they simulate neural networks in Google deep-mind and other similar AI systems are they writing code that simulates neural networks or are they litterally building hardware that simulates neural networks? | askscience | https://www.reddit.com/r/askscience/comments/4a57v9/when_they_simulate_neural_networks_in_google/ | {
"a_id": [
"d0xu2ax"
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"score": [
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"text": [
"Depends on the word \"similar\". Most neural networks are based of a very simple code... infact... I'll go grab one from when I wrote a neural network to recognize hand written digits:\n\n function g = sigmoid(z)\n g = 1.0 ./ (1.0 + exp... | [] | [] | [
[]
] | ||
5szdv4 | how do we know/guess how many died in historic plagues? | Hello all,
I've done a bit of hunting on the web, but don't seem to be able to clear this up- how do historians arrive at a number for epidemic- related death tolls?
Wikipedia lists epidemics going back centuries, and some of the numbers dead for the Antonine Plague/Black Death are truly astronomical- but it got me t... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5szdv4/eli5_how_do_we_knowguess_how_many_died_in/ | {
"a_id": [
"ddj0424"
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"score": [
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"text": [
" > but it got me thinking- how do they know?\n\nPeople wrote stuff down. Even back then it was important if people died, and keeping track of population was important for things like taxation. Researchers can look at a period of time and see how... | [] | [] | [
[]
] | |
qi569 | Is it possible to predict where and how a glass will break? | My curiosity was sparked when i saw a gif of a wine glass falling and breaking in slow motion. I am wondering if it would be possible to predict where and how a glass, such as a wine glass or even just a window or panel, would initially break. Certain factors would have to be known, such as initial velocity, spin, all ... | askscience | http://www.reddit.com/r/askscience/comments/qi569/is_it_possible_to_predict_where_and_how_a_glass/ | {
"a_id": [
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"text": [
"It depends.\n\nWith structural analysis finding the general areas and different modes of fracture is more or less straightforward. However, the specific fracture crack pattern and exact positions are very difficult or impossible to calculate beca... | [] | [] | [
[]
] | |
7oeo0r | Pictures used to load from the top down, now they load blurry and clear up as more data is received. Why? | askscience | https://www.reddit.com/r/askscience/comments/7oeo0r/pictures_used_to_load_from_the_top_down_now_they/ | {
"a_id": [
"ds97p1f",
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8,
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"text": [
"Basically it's all about the file format and bitmap encoding.\n\nCertain file formats (as an example, JPEGs) can be saved in a interlaced encoded bitmap^^1 . This encoding works by sending a \"rough draft\" of sorts for what... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Interlacing_(bitmaps)",
"https://upload.wikimedia.org/wikipedia/commons/2/27/Adam7_passes.gif"
],
[
"https://en.wikipedia.org/wiki/Adam7_algorithm"
]
] | ||
ao0lnx | what's the appeal of 4chan? every time i try to read it doesn't make sense | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ao0lnx/eli5_whats_the_appeal_of_4chan_every_time_i_try/ | {
"a_id": [
"efxea5l",
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"score": [
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8,
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"text": [
"Much of what happens on 4Chan is what's called shitposting. I.e intentionally posting drivel (either harmless or inflammatory drivel). There are also lots of inside jokes and bits of jargon that origin... | [] | [] | [
[],
[],
[]
] | ||
6azgqp | how can we feel tense / bad atmospheres in certain places? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6azgqp/eli5_how_can_we_feel_tense_bad_atmospheres_in/ | {
"a_id": [
"dhiolkm"
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"score": [
3
],
"text": [
"It's a purely psychological effect. The \"atmosphere\" isn't real, but lots of symptoms are -- these can include an odd smell, an unusual quiet, the presence of nervous-acting people, or objects arranged in a manner that's unusually messed up or ... | [] | [] | [
[]
] | ||
2xrpd1 | why do arcades use coins instead of quarters? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xrpd1/eli5_why_do_arcades_use_coins_instead_of_quarters/ | {
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"text": [
"I've always thought that people were more likely to spend \"coins\" as they don't see them as money in the same way. Plus coins lock a person into spending a certain amount of mone... | [] | [] | [
[],
[],
[],
[]
] | ||
3iyph4 | how does solid state memory work with no moving parts? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3iyph4/eli5_how_does_solid_state_memory_work_with_no/ | {
"a_id": [
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"text": [
"Essentially, Solid State memory functions by creating \"cells\" that can be written on to, and require no energy to maintain.\n\nTo be more specific, like with the interior of a CPU, we encase super-tiny mechanisms called Fl... | [] | [] | [
[
"http://www.amazon.com/Kingston-DataTraveler-Predator-1TB-DTHXP30/dp/B00E65QM8O"
],
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"https://en.wikipedia.org/wiki/Floating-gate_MOSFET",
"https://en.wikipedia.org/wiki/Quantum_tunnelling",
"https://en.wikipedia.org/wiki/Flip-flop_%28electronics%29"
]
] | ||
dd5zza | Where does the flap-flap sound of a helicopter come from? Do all helicopters sound the same? | Sometimes helicopters have a rhythmic sound sometimes a swooshing.
Where does the rhythm come from?
It seems to be way slower than the rotation speed.
What causes the sounds? Are there more silent helicopters? | askscience | https://www.reddit.com/r/askscience/comments/dd5zza/where_does_the_flapflap_sound_of_a_helicopter/ | {
"a_id": [
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"text": [
"The \"thup thup\" sound comes from the disturbance in air caused by the interaction between the main rotor and the tail rotor. They are both moving a lot of air, and the way those airflows interact cause a bunch of noise. ... | [] | [] | [
[],
[]
] | |
a3eata | Why did we cultivate onions even though we couldn’t eat them the same way as apples or oranges? | askscience | https://www.reddit.com/r/askscience/comments/a3eata/why_did_we_cultivate_onions_even_though_we/ | {
"a_id": [
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"text": [
"Its more of an historical questions then biology. As you can very well eat an onion just like an apple - > if you use one that is not as strong in flavor like red onions. You can also eat it raw and make pickles...Onions where used hundreds of y... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Persia",
"https://en.wikipedia.org/wiki/Lumbago",
"https://en.wikipedia.org/wiki/Onion#cite_note-21",
"https://en.wikipedia.org/wiki/Pliny_the_Elder",
"https://en.wikipedia.org/wiki/Onion#cite_note-20",
"https://en.wikipedia.org/wiki/Ancient_Egypt",
"http... | ||
5pb8p0 | why is heart cancer so rare? | The heart's an organ just like the brain, right? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5pb8p0/eli5_why_is_heart_cancer_so_rare/ | {
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cgvb94 | What was life like for a Canadian infantry soldier in NW Europe during WW2? | I am researching my grandfather's military service during WW2. He was a member of the Stormont, Dundas and Glengarry Highlanders, one of the three regiments constituting the 9th Canadian Infantry Brigade, which was part of the 3rd Canadian Infantry Division (the Water Rats).
My grandfather didn't see active com... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cgvb94/what_was_life_like_for_a_canadian_infantry/ | {
"a_id": [
"euol8uz"
],
"score": [
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],
"text": [
"If you haven't read Tim Cook's work, start there. His novels are incredibly easy to read and he does an excellent job capturing WWI and WW2 (The Necessary War, Fight to the Finish) in his two volume sets. That would be a good starting point anywa... | [] | [] | [
[]
] | |
7ns9io | when your body is submerged in cold water, it feels freezing at first, then starts to feel warmer and warmer. when your body is exposed to cold air, it feels okay at first, then gets colder and colder. what causes this phenomenon? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7ns9io/eli5_when_your_body_is_submerged_in_cold_water_it/ | {
"a_id": [
"ds45ygs",
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26,
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"text": [
"I'm no expert, but I think it has to do with body heat. In the water, your body heat and the temperature of the water find an equilibrium where both are at the same temperature, whereas in the air, it... | [] | [] | [
[],
[],
[]
] | ||
2uet83 | Do quantum computers, if developed to the same scale as regular PC's, have any use to a regular person? | It seems that, if I understand correctly, quantum computers would be mostly restricted to solving very complex problems that would simply take too long to solve on a standard computer.
If they were developed enough so that they could be shrunk down to the size of a regular PC, would the average user have any use of o... | askscience | http://www.reddit.com/r/askscience/comments/2uet83/do_quantum_computers_if_developed_to_the_same/ | {
"a_id": [
"co8qnsa"
],
"score": [
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"text": [
"you can do everything you can do with a normal computer with a quantum computer. Because of how quantum computers work, every step needs to be reversible.\n\nyou can add 1+3 on a normal computer, and in the end you have 4, without knowing if the ... | [] | [] | [
[
"http://www.vad1.com/lab/full-eavesdropping-2011/"
]
] | |
1ufsvt | Are there any records, from ancient civilizations, of stars (or other celestial objects) that cannot be seen or found in the sky today? | I'm assuming that thousands of stars that were visible during ancient times have supernova'd, or have some sort of other unfortunate fate befall them, and are not visible today. Did ancient astronomers document celestial bodies that cannot be found today?
*edit for grammar | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ufsvt/are_there_any_records_from_ancient_civilizations/ | {
"a_id": [
"cehrfjm"
],
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" > I'm assuming that thousands of stars that were visible during ancient times have supernova'd\n---\n\nAnswer is **yes**. \n\nBut let me intrude a bit into r/askscience :\n\nThere are just ~5,600 stars visible by [naked eye](_URL_7_). \n\nStric... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Nova",
"http://www.icq.eps.harvard.edu/MagScale.html",
"http://csep10.phys.utk.edu/astr162/lect/binaries/algol.html",
"http://messier.seds.org/more/mw_sn.html",
"http://en.wikipedia.org/wiki/Mira",
"http://en.wikipedia.org/wiki/Apparent_magnitude",
"http:/... | |
2eq3a0 | if the airline industry is struggling, wouldn't it be better for them to sell unbooked seats for less at the last minute than operate at a loss? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2eq3a0/eli5_if_the_airline_industry_is_struggling/ | {
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"To a point, but remember that planes take fuel. It takes a certain amount of fuel to get your weight from A to B. If you want to fly... | [] | [] | [
[],
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[],
[],
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2kww30 | What are some ancient Roman spooky tales? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2kww30/what_are_some_ancient_roman_spooky_tales/ | {
"a_id": [
"clpfo0h",
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"text": [
"My first article, which appeared in Arv: The Scandinavian Yearbook of Folklore in 1979, dealt with two legends from the 1st-century primary source, The Satyricon. One legend dealt with a soldier who changed himself into a wo... | [] | [] | [
[],
[
"http://www.reddit.com/r/AskHistorians/comments/2kvuyv/friday_freeforall_october_31_2014/clpauoo"
]
] | ||
eg3gwb | how can a government block targeted internet access once starlink is available vs traditional isp? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eg3gwb/eli5_how_can_a_government_block_targeted_internet/ | {
"a_id": [
"fc45ivk",
"fc45whz"
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"score": [
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2
],
"text": [
"The first and simplest way would be to demand that SpaceX stop providing service when the government demands. Almost certainly they are going to agree to do so.\n\nOtherwise the government doesn’t give them a business licens... | [] | [] | [
[],
[]
] | ||
fmzyo5 | how do the graphics card, ram, and processor all work together to determine performance of a pc? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fmzyo5/eli5_how_do_the_graphics_card_ram_and_processor/ | {
"a_id": [
"fl6w1tg",
"fl6y4ak"
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"score": [
20,
8
],
"text": [
"CPU is its ability to do math. Everything a computer does is dictated by math, so this makes things faster. However you can't get faster than almost instant (dictated by speed of electrons wizzing around inside) so if the... | [] | [] | [
[],
[]
] | ||
69vk5l | why is the tip of the human nose made of cartilage? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/69vk5l/eli5_why_is_the_tip_of_the_human_nose_made_of/ | {
"a_id": [
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"score": [
4,
3
],
"text": [
"The actual reason, although rather vague, is that natural selection leads to traits that are more advantageous for survival to be selected for and thereby become more prevalent in a population. So having a cartilaginous tip... | [] | [] | [
[],
[]
] | ||
2bg72t | what exactly makes cheap beer taste much worse than something more expensive? | What in the process of brewing beer can be "cheapened" thus making a cheaper beer taste like crap? Is it just more watered down or is there more to it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2bg72t/eli5_what_exactly_makes_cheap_beer_taste_much/ | {
"a_id": [
"cj50qfo",
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"score": [
4,
4
],
"text": [
"Some of the big boys use rice in their beers. And their light beers are just overfermented then watered down. You can really taste poor quality ingredients.",
"Without going into too much detail the flavor of a beer is d... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Mashing",
"http://en.wikipedia.org/wiki/Wort"
]
] | |
2634p2 | why can my ipad play videos for hours straight without even having a fan, while my laptop reaches 85deg c and higher after streaming netflix for only 2 minutes? | I would think the technology in my Macbrook Pro surpasses that inside of my iPad, so why does video seem to be so much more taxing when played on the laptop?
I can watch hours and hours of Netflix and _URL_0_ without any heat coming from my iPad, but my laptop gets hot as hell after less than 5 minutes. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2634p2/eli5_why_can_my_ipad_play_videos_for_hours/ | {
"a_id": [
"chn76iw",
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6,
8,
3
],
"text": [
"Well your laptop has a full blown processor it running a full blown OS. That requires a lot of processing power to handle all the background processes and other elements that come with it. The ipad on t... | [] | [
"Twitch.tv"
] | [
[],
[],
[]
] | |
1vvr08 | How did technology evolve from analog to digital? | How did technology evolve this way and why? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1vvr08/how_did_technology_evolve_from_analog_to_digital/ | {
"a_id": [
"cex5bwx"
],
"score": [
3
],
"text": [
"The first step in digital electronics was the [flip-flop](_URL_1_), at around 1919. A flip-flop is a circuit with two stable states (which can be thought of as 0 or 1).\n\nWhy is digital a good thing? \n\nLet's start with what analog is. Analog m... | [] | [] | [
[
"http://www.worldcat.org/title/universal-history-of-computing-from-the-abacus-to-the-quantum-computer/oclc/45129307&referer=brief_results",
"https://en.wikipedia.org/wiki/Flip-flop_(electronics\\)"
]
] | |
1i785c | how do protesters have time to protest for days on end? | Don't these people have jobs or other responsibilities that require their attention? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1i785c/eli5_how_do_protesters_have_time_to_protest_for/ | {
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14yg02 | What were the reasons behind the rise of the Caliphate? | This topic is scarcely covered in the Western literature, especially in the schools' curricula so I would like to ask you what were the reasons behind the relatively fast rise of the Islamic Caliphate and later Islamic kingdoms? The relatively unknown, semi-nomadic people conquered vast tracts of land in quite short am... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/14yg02/what_were_the_reasons_behind_the_rise_of_the/ | {
"a_id": [
"c7hng3i",
"c7hrqnf",
"c7ht3r6"
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"score": [
2,
2,
8
],
"text": [
"I always suggest this because its my favorite book, but \"Destiny Disrupted: A History of the World Through Islamic Eyes\" by Tanim Ansary goes into great detail about the rise of the Caliphate, why it ... | [] | [] | [
[],
[],
[
"http://www.amazon.com/Islamic-Conquests-History-Project-Reprints/dp/1597404586/ref=sr_1_1?ie=UTF8&qid=1355720318&sr=8-1&keywords=Early+Islamic+Conquests"
]
] | |
8w6f6x | why do bugs when outside fly around the same area with a bunch of other bugs instead of being spread apart? typically gnat like bugs. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8w6f6x/eli5_why_do_bugs_when_outside_fly_around_the_same/ | {
"a_id": [
"e1t2mnc"
],
"score": [
4
],
"text": [
"They are making more bugs via the usual route. That requires them to be in close proximity. Think of it like you are walking through a bug night club."
]
} | [] | [] | [
[]
] | ||
4gxoyt | Why are spinal discs so prone to hernias? | I'm a 1st year med student, studying the lumbar region in anatomy, we barely brush on the subject and the professor wasn't able to give me the answer I was looking for.
So, throughout the millions of years of evolution, how come the spinal discs are STILL so prone to hernias and bulges? I mean, it was enough for me to... | askscience | https://www.reddit.com/r/askscience/comments/4gxoyt/why_are_spinal_discs_so_prone_to_hernias/ | {
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"text": [
"People are pretty out of shape compared to the fitness level we evolved with, so I would think less supporting musculature? Maybe we sporadically lift heavier objects than we were... | [] | [] | [
[],
[],
[],
[]
] | |
a02ivq | How do particles turn to follow the circular path of the Large Hadron Collider? | askscience | https://www.reddit.com/r/askscience/comments/a02ivq/how_do_particles_turn_to_follow_the_circular_path/ | {
"a_id": [
"eae1eta",
"eae27tf"
],
"score": [
13,
6
],
"text": [
"The trajectories of the particles in the beam are curved using magnetic fields. Particularly, superconducting dipole magnets. You can read more about them [here](_URL_0_).",
"A charged particle moving through a magnetic... | [] | [] | [
[
"https://www.lhc-closer.es/taking_a_closer_look_at_lhc/0.magnetic_dipoles"
],
[]
] | ||
1dhx0f | music in dreams | Why is it that music in some dreams (I've heard multiple people say the same thing) are usually beautiful and songs that have never been heard before? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1dhx0f/eli5_music_in_dreams/ | {
"a_id": [
"c9qi4rk",
"c9qipoo",
"c9qj33m",
"c9qkyre",
"c9quzc5"
],
"score": [
9,
7,
2,
2,
2
],
"text": [
"Because your mind is beautiful and capable of an incomprehensible amount of creativity. ",
"This has happened to me before. I heard a beat while I was dre... | [] | [] | [
[],
[],
[],
[
"http://www.amazon.com/Musicophilia-Tales-Music-Revised-Expanded/dp/1400033535/ref=sr_1_5?s=books&ie=UTF8&qid=1367444787&sr=1-5&keywords=oliver+sacks"
],
[]
] | |
3dudww | How did 'tribes' or 'tribal federations' work? E.g the Saxons or the Angles | Basically I am wondering what made a person a 'saxon' rather than a person from XXXX tribe or clan? What level of difference is needed between a Saxon or an Angle? Is it similar to differentiating between Germanic peoples and other tribes? Thanks | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3dudww/how_did_tribes_or_tribal_federations_work_eg_the/ | {
"a_id": [
"ct95f1t"
],
"score": [
6
],
"text": [
"I want to direct your attention to [this quite excellent post](_URL_0_) by /u/Aerandir. The context he wrote that was for a discussion about what the definition of tribe is/should be. \n\nI don't believe the concept of 'tribal federation' is real... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/31o2nt/monday_methods_definitions_of_tribe/cq3jg6z"
]
] | |
1vkq8q | why ice molecules are closer together than water molecules, yet ice of the same mass as water takes up more space. | I've been mind blown about this for quite a while. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vkq8q/eli5why_ice_molecules_are_closer_together_than/ | {
"a_id": [
"cet7d5d"
],
"score": [
2
],
"text": [
"They're not closer together, I forget what it's called and why they do it but at the very moment of freezing the particles basically jump away from each other. \n\nIt's because of this that ice evaporates faster than water, the molecules are alre... | [] | [] | [
[]
] | |
2usx94 | How do scientists refer to specific points in space without an up or down or polar directions (E,S,N,W)? | Sorry for the awkward wording. | askscience | http://www.reddit.com/r/askscience/comments/2usx94/how_do_scientists_refer_to_specific_points_in/ | {
"a_id": [
"cobyaot"
],
"score": [
3
],
"text": [
"I actually don't know for sure, but I assume an X,Y,Z system using a common central point. \n \nI actually want to find this out now. To the Google! \n \nFound this site : _URL_0_\n\nIs that what you are after?"
]
} | [] | [] | [
[
"http://www.skyandtelescope.com/astronomy-resources/what-are-celestial-coordinates/"
]
] | |
ee8i0q | movie trailers show "festival award winner". how do movies win awards before they are released? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ee8i0q/eli5_movie_trailers_show_festival_award_winner/ | {
"a_id": [
"fbram8v"
],
"score": [
2
],
"text": [
"Most movies are finished long before they're released. They're shown at certain film festivals or given limited releases in a few major cities before they get into theatres everywhere."
]
} | [] | [] | [
[]
] | ||
axuv3z | if you are alone with a tire in an empty space, if you spin the tire, will it go forever? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/axuv3z/eli5_if_you_are_alone_with_a_tire_in_an_empty/ | {
"a_id": [
"ehwarqd",
"ehwaxhz"
],
"score": [
2,
2
],
"text": [
"Is the tire on the ground or floating in a vacuum?",
"If you are in the vacuum of empty space, no air, no light, and no other objects, (no gravity) then yes it will spin forever, assuming there's no air in the tire.\n\... | [] | [] | [
[],
[]
] | ||
1xmpm1 | how did that consitition accommodate both federalist and anti-federalist viewpoints | thanks!
edit: its Constitution not consitition. TYPO | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1xmpm1/eli5_how_did_that_consitition_accommodate_both/ | {
"a_id": [
"cfcpudn",
"cfcsevm"
],
"score": [
2,
2
],
"text": [
"United States 1.0, the Articles of Confederation, was a strongly federalist system. The central government in US1.0 could only act when the States were in consensus - which means each state had a veto on the actions of the ... | [] | [] | [
[],
[
"http://www.reddit.com/r/Ask_Politics/comments/1xmrss/how_did_that_constitution_accommodate_both/"
]
] | |
3vl5hm | how did u.s. colleges not only get into football in the first place, but also become so extremely invested in their stadiums, teams etc. over time? | College football is really cool, but when it comes right down to it, football seemingly has nothing to do with education. How did they become so intertwined? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3vl5hm/eli5_how_did_us_colleges_not_only_get_into/ | {
"a_id": [
"cxofk5p",
"cxoh8mf"
],
"score": [
5,
8
],
"text": [
"Long story short sports are big money. Over the years they have gotten bigger and bigger by everyone wanting to one up everyone else. Football and emerged as the biggest sport over the years in America. Football being big mo... | [] | [] | [
[],
[]
] | |
362zzv | Dorian invasion, sea peoples, and Phoenicia. Any relations? | What we do know.
Collapse of Bronze Age, to include Mycenae Greece. According to Return of the Heracleidae, Heracles and/or his ancestors invaded the Peloponnese.
According to Ramses a sea peoples attacked Egypt and brought nations northeast of Egypt down.
I'm wondering if they're related. To my understanding the P... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/362zzv/dorian_invasion_sea_peoples_and_phoenicia_any/ | {
"a_id": [
"cra9btt"
],
"score": [
8
],
"text": [
"You may be interested in [this recent AMA](_URL_0_) with Eric H. Cline, author of *1177 BC: The Year Civilization Collapsed*."
]
} | [] | [
"http://en.m.wikipedia.org/wiki/Heracleidae"
] | [
[
"https://www.reddit.com/r/AskHistorians/comments/2zde5t/ama_bronze_age_archaeology_and_history/"
]
] | |
25sxlm | what are the results of the indian elections, and what does it mean? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/25sxlm/eli5_what_are_the_results_of_the_indian_elections/ | {
"a_id": [
"chklbhq",
"chkm49w",
"chknozv",
"chkpa7h"
],
"score": [
15,
77,
11,
6
],
"text": [
"People are giving out pros and cons, but this means there is a bias.\n\nWithout bias, the elections have no meaning. A party has been elected democratically in India, and it is ... | [] | [] | [
[],
[],
[],
[]
] | ||
1lopv4 | why do whiskey/bourbon have more carbs than vodka? | I keep hearing that Whiskey and Bourbon have more carbs than Vodka but this doesn't make sense to me. All are distilled spirits and from what I understand Whiskey and Bourbon don't take on that amber color until they sit in barrels for many, many months or years.
Is it a myth or fact and why? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1lopv4/eli5_why_do_whiskeybourbon_have_more_carbs_than/ | {
"a_id": [
"cc1a19x"
],
"score": [
2
],
"text": [
"_URL_0_\n\nThey don't have any carbs"
]
} | [] | [] | [
[
"http://www.carbs-information.com/carbs-in-alcohol.htm"
]
] | |
fbgffu | what actually make the teeth grow and push through the gum? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fbgffu/eli5_what_actually_make_the_teeth_grow_and_push/ | {
"a_id": [
"fj491wb"
],
"score": [
2
],
"text": [
"Root resorption - simply put when the tooth is developed (which is an entire process) the adult teeth begin to push on the baby teeth which causes the roots of the baby teeth to shrink, become loose, and fall out."
]
} | [] | [] | [
[]
] | ||
65hkvo | if vaping is just inhaling water vapor and some ingredients, why does the room get foggy with still smoke, instead of it just dissipating? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/65hkvo/eli5_if_vaping_is_just_inhaling_water_vapor_and/ | {
"a_id": [
"dgacuq0",
"dgacy3x"
],
"score": [
2,
2
],
"text": [
"It's vapor of polyprolene glycol and glycerine. That stuff is a liquid at normal room temps. so when mechanically vaporized, it sticks around in vapor droplet form",
"It's not water vapour. The vaping fluid contains ve... | [] | [] | [
[],
[]
] |
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