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 |
|---|---|---|---|---|---|---|---|---|---|
eno3pg | why does a car not move when you leave it in gear. | When you have the ignition turned off and leave it in gear the car doesn't move, even when the handbrake us off. Why is this? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eno3pg/eli5_why_does_a_car_not_move_when_you_leave_it_in/ | {
"a_id": [
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"text": [
"When it's in gear, the driving wheels are connected to the engine. An engine's crankshaft, when it's not running, is extremely hard to turn. Trying to push the car, or leaving it on a hill, won't be enough to make the wheels... | [] | [] | [
[],
[]
] | |
2z7kho | Can you cross breed sharks? | Could we ever see a great white hammerhead shark? | askscience | http://www.reddit.com/r/askscience/comments/2z7kho/can_you_cross_breed_sharks/ | {
"a_id": [
"cphbqbj"
],
"score": [
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"text": [
"Can it be possible to hybridize sharks? Yes. That particular combination, no. In order to cross breed, the two species must be closely related. Even then, the offspring usually are sterile. Sharks are unlikely to breed outside their species, so i... | [] | [] | [
[]
] | |
21yrkg | -how do ear candles work? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/21yrkg/eli5how_do_ear_candles_work/ | {
"a_id": [
"cghpj2k",
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"score": [
5,
4
],
"text": [
"By good feelings and well wishes.",
"They don't work at all, and are potentially dangerous. Here in Canada, they are actually illegal to sell, as they have no medical utility but have been shown to cause serious injuries... | [] | [] | [
[],
[]
] | ||
2h9yej | why do most forms say "caucasian" as an option for white if most white people aren't even from the caucus region? | i see it everywhere all the time and i don't understand.
or am i wrong and caucasian is a correct term?
*caucasus | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2h9yej/eli5_why_do_most_forms_say_caucasian_as_an_option/ | {
"a_id": [
"ckqqj3r"
],
"score": [
8
],
"text": [
"Because a German man named [Christoph Meiners](_URL_0_) decided there were two races: Caucasians, who had the people of the southern Caucuses as their archetype, and Mongoloids, who were... everyone else. Christoph was something of a racist, so t... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Christoph_Meiners"
]
] | |
9fvcob | what are extras in movies actually talking about in the background? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9fvcob/eli5_what_are_extras_in_movies_actually_talking/ | {
"a_id": [
"e5zh7by",
"e5zr16k"
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"score": [
2,
2
],
"text": [
"I had a friend who did that kind of work in NYC. She said they would sit there trying to make the other person laugh. Check out a cafe scene next chance you get and see how many people are trying not to laugh. ",
"Usuall... | [] | [] | [
[],
[]
] | ||
tfj6t | Are there any good books or documentaries about Japan's Sengoku Jidai period? | I've admittedly been playing quite a bit of Total War: Shogun 2 and I ended up spending an hour just reading the game's encyclopedia. I'm looking for any kind of introductory material on the subject, preferably documentaries. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/tfj6t/are_there_any_good_books_or_documentaries_about/ | {
"a_id": [
"c4m9zjq"
],
"score": [
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],
"text": [
"If you've been playing Shogun, I imagine you're looking for a military history. Sadly, I'm not aware of any authoritative military histories of the sengoku era. \n\nIf you're interested in the time period in general, Berry's [*The Culture of Ci... | [] | [] | [
[
"http://books.google.com/books/about/The_Culture_of_Civil_War_in_Kyoto.html?id=z6wudj2tvwUC"
]
] | |
3eobwv | what exactly happens when you trade in your phone to get credit/upgrades with your cellphone company? | I've always been a little sketched out by trading in my phone to my cell phone company for credits/earlier upgrades, so I'm hoping someone can explain exactly what they do with traded in phones, especially older models that they maybe don't sell in stores anymore. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3eobwv/eli5_what_exactly_happens_when_you_trade_in_your/ | {
"a_id": [
"ctgtt4e"
],
"score": [
3
],
"text": [
"They aren't stealing your personal information if thats what you're worried about. One of the first things they do is wipe it. If you're really concerned about it you can wipe it yourself beforehand. They get them repaired/cleaned up to sale cond... | [] | [] | [
[]
] | |
4pp8hv | how does lightning "repair" the ozone? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4pp8hv/eli5_how_does_lightning_repair_the_ozone/ | {
"a_id": [
"d4mrlji",
"d4mrmrq"
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"score": [
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2
],
"text": [
"The high Voltage Discharge of the lightning has enough energy to Ionize some oxygen molecules which then reacts to O3 (ozone).\nSo O2 + Energy = 2 O• - > O• + O2 = O3 \n Look at it as if you had magnets 2 stick together and... | [] | [] | [
[],
[]
] | ||
agoq9c | why does old electronics produce a high ptched noice when turned on? | Plenty of old, and new electronics produce high pitched noices when turned on, is it the electrons somehow doing it, or are there small sparks in the circuits? Best example of this is probably old TVs. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/agoq9c/eli5_why_does_old_electronics_produce_a_high/ | {
"a_id": [
"ee7rf9j"
],
"score": [
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],
"text": [
"The specific component is called the \"flyback transformer\". The whine is mentioned in this section:\n\n[_URL_1_](_URL_0_)\n\nMore specifically, the high frequency alternating magnetic field makes the transformer core vibrate at whatever freque... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Flyback_transformer#Operation_and_usage",
"http://en.wikipedia.org/wiki/Flyback\\_transformer#Operation\\_and\\_usage"
]
] | |
ftndrh | If coronavirus is spread by people coughing and sneezing how are asymptomatic people spreading it when they don't do either? | I've heard a lot about asymptomatic people spreading it without realising they even have it - but the news says coronavirus is spread by people coughing and sneezing. So how are they spreading it when by definition asymptomatic people don't cough or sneeze? | askscience | https://www.reddit.com/r/askscience/comments/ftndrh/if_coronavirus_is_spread_by_people_coughing_and/ | {
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34,
24,
4,
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"text": [
"People that are asymptomatic don’t cough or sneeze due to the virus. They are still very much infected though, and coughs/sneezes hap... | [] | [] | [
[],
[],
[],
[],
[],
[
"https://www.who.int/news-room/q-a-detail/q-a-similarities-and-differences-covid-19-and-influenza"
]
] | |
5skv4z | does alcohol tolerance come from your body learning to metabolise it more efficiently, or your brain learning to function better whilst under the influence, or both? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5skv4z/eli5_does_alcohol_tolerance_come_from_your_body/ | {
"a_id": [
"ddft0re",
"ddfvv4o",
"ddfwo1n",
"ddfxlu1"
],
"score": [
215,
20,
3,
2
],
"text": [
"Both. Alcohol is metabolized into its non-toxic (less toxic?) form by enzymes in the liver. Once your liver realizes that it is frequently encountering this thing, it starts pro... | [] | [] | [
[],
[],
[],
[]
] | ||
66fcet | the venezuelan protests right now. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/66fcet/eli5_the_venezuelan_protests_right_now/ | {
"a_id": [
"dgi2u6k"
],
"score": [
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],
"text": [
"Power vacuum after the death of chavez. people don't have money for food, and their money isn't worth much globally anyway. intense violence in the streets over the past year (i.e. robbery and murder). a nation raised under a nationalist/socialis... | [] | [] | [
[]
] | ||
28a64c | Are there any languages that a parrot CANNOT learn to properly mimic? | askscience | http://www.reddit.com/r/askscience/comments/28a64c/are_there_any_languages_that_a_parrot_cannot/ | {
"a_id": [
"ci8yh4l",
"ci8yngx"
],
"score": [
7,
23
],
"text": [
"I'll try and find a non-paywall soucre for this: _URL_0_\n\nIt touches a lot on African Grey vocal abilities. \n\nParrots can mimic a wide range of noises that humans make, but not all of them.\n\nSome sounds, like \"em\" o... | [] | [] | [
[
"http://link.springer.com/article/10.1007%2Fs10211-011-0106-9"
],
[
"http://en.wikipedia.org/wiki/Co-articulated_consonant",
"http://en.wikipedia.org/wiki/Click_consonant"
]
] | ||
2azqxj | how would it feel like to be a spider's prey? how long would you stay alive, and would you feel pain? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2azqxj/eli5_how_would_it_feel_like_to_be_a_spiders_prey/ | {
"a_id": [
"cj0d2o8"
],
"score": [
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],
"text": [
"You wouldn't live for all that long. First you would be caught, and wrapped up in the web. Then the spider would bite you and inject you with their venom. It would work its way through your body, melting your internal organs. You would survive un... | [] | [] | [
[]
] | ||
2c5ogx | how can a corporation be considered a person in the usa (and therefore a usa citizen...?) if they move their company to a different country and do not pay taxes in the usa. | Thanks for the answers. This popped into my head at like 3 AM this morning so I wasn't really think I about the persons v citizens aspect. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2c5ogx/eli5_how_can_a_corporation_be_considered_a_person/ | {
"a_id": [
"cjc7gl9"
],
"score": [
2
],
"text": [
"An important distinction: corporations are not considered U.S. citizens. Never before in American history has that ever even been considered.\n\nFor the purpose of applications of common law and protection under the Constitution, there is a conce... | [] | [] | [
[]
] | |
2enkju | why do certain foods make me gassy? what the heck is going on inside me? | Seriously, I roasted and ate 3 garlic heads last night and I haven't stopped farting since 8am CST.
EDIT: Clarification: Why do certain foods make me ***MORE*** gassy than others? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2enkju/eli5_why_do_certain_foods_make_me_gassy_what_the/ | {
"a_id": [
"ck15mha",
"ck1829x",
"ck19y3m"
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"score": [
2,
2,
2
],
"text": [
"Bacteria that lives in your stomach feeds on the food you eat and produces gas byproducts. ",
"OMG I had oatmeal this morning and yep... still tooting! ",
"Everyone has unique bacteria in their... | [] | [] | [
[],
[],
[]
] | |
aiqmwv | When you drink caffeine, does it act like glucose and simply give your cells more energy, or is there something more going on? | I was drinking my morning cup and wondering what the hell it was actually doing to me. I understand that adenosine binds with its receptors to make you feel tired, but I can't seem to figure out how that would correlate to drinking an "energy supplement" like caffeine. That's why I assume that it has something to do wi... | askscience | https://www.reddit.com/r/askscience/comments/aiqmwv/when_you_drink_caffeine_does_it_act_like_glucose/ | {
"a_id": [
"eeq560t"
],
"score": [
10
],
"text": [
"What you've read is close to the truth. Your idea about glucose is not.\n\nVery simply put the action of caffeine is supposed to feel like you have more energy, that is to say, less tired. It does not provide any meaningful calories.\n\nSo how d... | [] | [] | [
[]
] | |
1xfnlq | why/how is the housing sector so important to nations economy? | The housing market seems to be mentioned far more than any other market when talking about the state of a nation's economy. Why is this?
EDIT: Wow, just realized that glaring grammatical error in the title. I guess that'll make it easier to treat me like a 5 year old, if anything. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1xfnlq/eli5_whyhow_is_the_housing_sector_so_important_to/ | {
"a_id": [
"cfawpbf",
"cfaxn84",
"cfaz26m",
"cfaz299",
"cfazbrr"
],
"score": [
10,
2,
17,
2,
2
],
"text": [
"a House is a big purchase. it's probably the Biggest purchase for most people.\n\n* people are more likely to buy a house when they're confident about thei... | [] | [] | [
[],
[
"http://www.calculatedriskblog.com/2010/02/housing-best-leading-indicator-for.html"
],
[
"http://www.federalreserve.gov/releases/z1/Current/z1r-7.pdf"
],
[],
[
"npr.org/money"
]
] | |
1w9o71 | how that dog from two floors down can continuously bark for two hours and not lose his voice | Also, what is wrong with that creature? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1w9o71/eli5_how_that_dog_from_two_floors_down_can/ | {
"a_id": [
"cf00dk4"
],
"score": [
3
],
"text": [
"he has seperation anxiety. i assume that he mainly does that when his owners are not at home? seperation anxiety builds up tension, so everytime he sees his owners leave the house he starts to get desperate and all the build up tension has to com... | [] | [] | [
[]
] | |
c9pxp6 | how do bullets fired into the air come down fast enough to do damage? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/c9pxp6/eli5_how_do_bullets_fired_into_the_air_come_down/ | {
"a_id": [
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8,
6,
5,
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"text": [
"Bullets are propelled by gases from a gunpowder charge. Once it leaves the barrel traveling up, eventually the round reaches an apex, a... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
dp30lh | My mother and grandmother keep saying that living in the Soviet Union was way better than it is now because during then there was alot of food with cheap prices and i hardly believe that,was it actually true or am I getting brainwashed? | I'm from Georgia btw so that can help you answer my question | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/dp30lh/my_mother_and_grandmother_keep_saying_that_living/ | {
"a_id": [
"f5sjdu4"
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"score": [
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],
"text": [
"Adapted from an earlier [answer](_URL_0_):\n\n You can poke around the internet and easily find graphs that claim that the average Soviet citizen had a higher caloric intake than the average American until the Soviet intake plummeted in 1991.\... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/akd6is/were_soviet_citizens_really_better_fed_than/",
"https://nintil.com/the-soviet-union-food/"
]
] | |
bck6ju | how does flavored seltzer have 0 calories per serving but 10 calories per bottle? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bck6ju/eli5_how_does_flavored_seltzer_have_0_calories/ | {
"a_id": [
"ekrbvvf",
"ekrbwmd",
"ekrc4nc"
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"score": [
2,
2,
2
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"text": [
"You're not required to disclose under 5 calories per serving per the FDA in the US - it can be rounded down to 0. As each serving is only 3.333... calories, it can be listed as no calorie.\n\n_URL_0_",... | [] | [] | [
[
"https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=101.60"
],
[],
[]
] | ||
37ws11 | Why does the United States not have a parliament like the United Kingdom? | Almost every former British colony currently possess a parliament similar to that of the United Kingdom. How come the US didn't have its own parliament like the UK does? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37ws11/why_does_the_united_states_not_have_a_parliament/ | {
"a_id": [
"crqxiu4"
],
"score": [
3
],
"text": [
"It was Parliament that had tried to tax them, in their view unjustly. The Declaratory Act had declared that Parliament could pass any Act it saw fit in regards to America. This idea of unlimited parliamentary sovereignty was anathema to Americans... | [] | [] | [
[
"http://www.constitution.org/fed/federa63.htm"
]
] | |
6ckesq | why is it difficult for us to recognize how annoying the annoying things we do are, when we're so quick to identify the annoying things other people do? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ckesq/eli5_why_is_it_difficult_for_us_to_recognize_how/ | {
"a_id": [
"dhvcfgi",
"dhvdttw"
],
"score": [
4,
2
],
"text": [
"It is one of those things in life. We are all born with a million small bottles, each with a label. One is greed, one is lust, one for ambition, one for honesty. Every single trait has its own jar. Love, empathy, distrust, l... | [] | [] | [
[],
[]
] | ||
17iv6f | can a programmer explain what a "delegate" is and why you should use it? | Language: c# | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/17iv6f/eli5_can_a_programmer_explain_what_a_delegate_is/ | {
"a_id": [
"c85woe1"
],
"score": [
2
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"text": [
"_URL_1_\n\ngives a good explanation.\n\nbasic answer: it's like a secure, typesafe version of C's function pointers. More simply put, it's an object which references a method. \n\nHere's a good example:\n_URL_0_\n\nIt's an easy way to pass a meth... | [] | [] | [
[
"http://www.codeproject.com/Articles/71154/C-Delegates-101-A-Practical-Example",
"http://msdn.microsoft.com/en-us/library/aa288459(v=vs.71).aspx"
]
] | |
8dgwhb | why does a phone without a battery break when dropped in water? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8dgwhb/eli5_why_does_a_phone_without_a_battery_break/ | {
"a_id": [
"dxn1e3e",
"dxn1l8l",
"dxn1poe"
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"score": [
9,
3,
2
],
"text": [
"Electronics guy here.\n\nIt happens because it isn't the water that breaks the phone - *minerals* ***left behind by the water*** cause short circuits which cause parts of the phone to fry the next time ... | [] | [] | [
[],
[],
[]
] | ||
48cd4h | From Facebook: "Pineapples were a status symbol in 18th century England. They were so expensive that you could rent them by the night and take them to parties with you". Can I get more insight on this? | Why the pineapple representing a symbol of status? Why not something like a banana or a strawberry?
How expensive were they in 18th century English currency (Euros they used, was it?) and what's the equivalency to the modern English coin (or Canadian, since I'm Canadian). | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/48cd4h/from_facebook_pineapples_were_a_status_symbol_in/ | {
"a_id": [
"d0it9xf",
"d0j1jar",
"d0j6ugt"
],
"score": [
123,
26,
12
],
"text": [
"Collecting exotic plants of all kinds was quite a popular pastime for the landed gentry and aristocracy of 18th century England. By this I mean that people were devoting a great deal of time and ene... | [] | [] | [
[
"https://upload.wikimedia.org/wikipedia/commons/3/37/Dunmore_pineapple.jpg"
],
[],
[]
] | |
14346o | What were the popular games during your period of expertise? | Was it Chess? Poker? Yahtzee? Maybe some other game that we don't play in modern times? If so, could you tell us more about the game?
Was your game popular during that time just because it was fun, or was there some cultural significance?
Was it more popular with any particular age group or profession?
Were there to... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/14346o/what_were_the_popular_games_during_your_period_of/ | {
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5,
16,
8,
8
],
"text": [
"[Crambo](_URL_0_) and [Whist](_URL_1_) were common upper class entertainments that aren't very well known today. ",
"Marie-Antoinette and Louis XVI wer... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Crambo",
"http://en.wikipedia.org/wiki/Whist"
],
[],
[],
[
"http://onlyagame.wbur.org/2012/05/26/monrovian-baseball"
],
[
"http://boardgamegeek.com/boardgame/1602/the-royal-game-of-ur",
"http://en.wikipedia.org/wiki/File:Bm-royalgame.jpg",
"http://... | |
1y0b3d | how are tangle-free headphones created? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1y0b3d/eli5_how_are_tanglefree_headphones_created/ | {
"a_id": [
"cfgegvf"
],
"score": [
13
],
"text": [
"They use wide flat cable that does not really flex much along the width. "
]
} | [] | [] | [
[]
] | ||
3bpwiu | What is the gold-colored wrapping on spacecraft and rover wiring? | [See Image](_URL_0_)
What is the gold wrapping on the wiring on Curiosity? Is it different from other, similarly colored coverings used on other spacecraft and rovers? | askscience | http://www.reddit.com/r/askscience/comments/3bpwiu/what_is_the_goldcolored_wrapping_on_spacecraft/ | {
"a_id": [
"csp4987",
"csp5db1"
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2
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"text": [
"_URL_0_\n\nIt's a lightweight insulator that keeps it's properties over large temperature ranges and doesn't have problems with outgassing in vacuums.\n\nHere's some on Amazon\n\n_URL_1_",
"They have a similar function a... | [] | [
"http://i.imgur.com/kvmXRXv.jpg"
] | [
[
"https://en.wikipedia.org/wiki/Kapton",
"http://www.amazon.com/Gold-Kapton-Tape-Polyimide-36yds/dp/B0049KTIAU"
],
[
"http://www.dunmore.com/products/multi-layer-films.html"
]
] | |
bfk3do | used oil? why is it considered bad for environment? | It comes from the ground anyway, why can't it be just dumped out on the ground? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bfk3do/eli5_used_oil_why_is_it_considered_bad_for/ | {
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3,
5,
5,
3
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"text": [
" > It comes from the ground anyway, why can't it be just dumped out on the ground?\n\nBecause it would seep into groundwater or other environmentally sensitiv... | [] | [] | [
[],
[],
[],
[],
[]
] | |
gbuj3 | Are the animals living in the city of Pripyat (the city that was devistated by the Cherynobil disaster) deformed from radiation? | askscience | http://www.reddit.com/r/askscience/comments/gbuj3/are_the_animals_living_in_the_city_of_pripyat_the/ | {
"a_id": [
"c1mekcy",
"c1meodo",
"c1meqyt"
],
"score": [
6,
5,
19
],
"text": [
"Also why do the pictures of abandoned interiors show peeling paint and what not - It seems as if the buildings have aged faster than I would have thought, even without humans there to maintain them",
... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Chernobyl_Nuclear_Power_Plant_Exclusion_Zone#Flora_and_fauna"
],
[
"http://cricket.biol.sc.edu/mousseau/mousseau.html"
]
] | ||
29b7v0 | how do tilt shift filters work? | How does a filter make something look like a toy model
Example: _URL_0_ | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29b7v0/eli5_how_do_tilt_shift_filters_work/ | {
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"Tilt-shift lenses are often used in architectural photography. Parallel lines that appear to converge due to perspective distortion can be realigned to appear parallel. Sometimes the terms 'perspective ... | [] | [
"http://b4silio.deviantart.com/art/Tilt-Shift-I-St-Saphorin-62699186"
] | [
[],
[],
[]
] | |
jst5n | Is our sense of time affected by the rate of chemical reactions? | So if our biological chemical reactions occurred as quickly as nitroglycerin breaks down into gases, would our perception of time be different? | askscience | http://www.reddit.com/r/askscience/comments/jst5n/is_our_sense_of_time_affected_by_the_rate_of/ | {
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"text": [
"It is much more complicated than that, and is a very active area of research.\n\nA professor at my school, David Eagleman, studies this stuff. He's a complete badass, check him o... | [] | [] | [
[
"http://en.wikipedia.org/wiki/David_Eagleman"
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[],
[
"http://en.wikipedia.org/wiki/David_Eagleman"
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3vfq8o | why is a man participating in rape culture if both the man and woman were drunk and not able to give consent | I am not talking about when a woman is passed out and the man is drunk, but as if they are on the same level of intoxication | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3vfq8o/eli5_why_is_a_man_participating_in_rape_culture/ | {
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"I'm not sure you know what \"rape culture\" means... It refers more to society's treatmen... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | |
6alvw6 | Do gravitational waves add up or cancel each other out in amplitude like sound waves do when two run into each other? | askscience | https://www.reddit.com/r/askscience/comments/6alvw6/do_gravitational_waves_add_up_or_cancel_each/ | {
"a_id": [
"dhfv94s",
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"text": [
"Asked and [answered](_URL_0_).",
"_URL_0_\n\n > Of course they can. Gravitational waves carry energy and energy curves space in a non - linear fashion.\nOne example would be to make a spherical 1000 km in diameter shell ... | [] | [] | [
[
"https://www.reddit.com/r/askscience/comments/2361h3/do_gravitational_waves_exhibit_constructive_and/"
],
[
"https://www.reddit.com/r/Physics/comments/47tgd3/can_gravity_waves_interfere_with_each_other/"
]
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ygh2d | a catch-22 situation? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ygh2d/eli5_a_catch22_situation/ | {
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"text": [
"In order to get your drivers license you have to present a copy of your birth certificate.\n\n\nIn order to get a copy of your birth c... | [] | [] | [
[],
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[],
[],
[],
[]
] | ||
14cg77 | I heard that orbiting objects are really just constantly falling, but they are moving so fast that when they fall they never hit the earth... How true is this? | Does that mean the spacestation, and anything else orbitting, is falling at a rate of 9.8 m/s2? | askscience | http://www.reddit.com/r/askscience/comments/14cg77/i_heard_that_orbiting_objects_are_really_just/ | {
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"text": [
"This is exactly correct. For any object moving in a circle, it must be experiencing a force called centripetal force pulling it inward toward the middle of the circle. This is ne... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Law_of_gravitation"
],
[]
] | |
3rv9f2 | how there can all the gold ever mined only add up to three swimming pools worth | Maybe I'm underestimating the size of an olympic swimming pool but in this [TED Ed video](_URL_0_) they say that all the gold we've ever mined in all of history would fit into three olympic size pools. How is this possible?
I understand that a lot of the jewelery and things we see aren't made completely of pure gold, ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3rv9f2/eli5_how_there_can_all_the_gold_ever_mined_only/ | {
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"cwrmx12",
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"score": [
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"text": [
"You probably greatly underestimate the size of an Olympic swimming pool. Such a pool is a minimum of 2500 m^(3), which is about a hundred million pounds of gold. At current gold prices of ~$1100 per tr... | [] | [
"https://www.youtube.com/watch?v=jf_4z4AKwJg"
] | [
[],
[],
[]
] | |
6cqwv4 | is body language cultural, genetic, inherited and/or something else? | 1. The way we move as we communicate, as we laugh, as we socialize - where does it come from?
2. Additional question which was what inspired me to ask this - why do we look down when we laugh? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6cqwv4/eli5_is_body_language_cultural_genetic_inherited/ | {
"a_id": [
"dhwtsxf",
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"text": [
"I would say 50/50. Laugh and clap seems to ve innate actions, while some gestures (Like the \"yes\" movement up and down with the head VS the \"no movement) are cultural.\n\n For example the military salute isn't something i... | [] | [] | [
[],
[
"https://www.kairos.com/blog/the-universally-recognized-facial-expressions-of-emotion"
]
] | |
3h786q | why are the blades on modern energy windmills so narrow? | It seems to me that you would want a thicker blade to capture more wind and turn faster.
Kind of what you think Holland's windmills were like.
Why are they so thin? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3h786q/eli5_why_are_the_blades_on_modern_energy/ | {
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"text": [
"You want it to be as light and efficient as possible. If it could be three feet tall weigh 50 lbs and deliver 1500 megawats/hour would't that be preferrable to a massive wooden wi... | [] | [] | [
[],
[],
[],
[
"http://www.doylesails.com/images/j70_spin.JPG",
"http://aviationweek.com/site-files/aviationweek.com/files/archive/www.aviationweek.com/Portals/AWeek/TWW/GrahamW/kd_AGA-33_highres%20crop.jpg",
"https://solarconduit.com/shop/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8... | |
29jisl | driving a fwd car in the snow | I live in the northern US, and we see a couple feet of snow every winter. From what I understand, FWD is better than RWD for the snow, but I have also heard that you are supposed to drive differently in slippery conditions. I googled it but there are a lot of terms I am not familiar with. Help!
Edit: Thanks for all t... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29jisl/eli5_driving_a_fwd_car_in_the_snow/ | {
"a_id": [
"cilkzx6"
],
"score": [
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"text": [
"Hey buddy, sounds like what you're getting at is understeer and oversteer. FWD cars are more prone to understeer, and RWD cars are more prone to oversteer. \n\n[This](_URL_0_) is the best image i can find to explain it simply.\n\nYou usually lose... | [] | [] | [
[
"http://autoweek.com/storyimage/CW/20070126/FREE/70122004/V3/0/V3-70122004.jpg&maxW=630"
]
] | |
6k6hbr | when we type up an email and hit "send", how does the internet know where to correctly deliver our email? what does this process look like between two computers/email accounts? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6k6hbr/eli5_when_we_type_up_an_email_and_hit_send_how/ | {
"a_id": [
"djjoz00",
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"score": [
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"text": [
"It works kind of like the post office. Think of it like this. The stuff after the @ symbol is the city. The stuff before the @ is the street address.\n\nWhen you hit send the email gets given to the post office of the \"city... | [] | [] | [
[],
[]
] | ||
2ykfb6 | why are snowden documents still being released, nearly two years later? | With the new revelations about hacking attempts on iPads and iPhones, I don't understand how or why are Snowden documents still being released.
Is he getting new documents? Or are these all part of the trove of documents he originally took?
Does it take two years to go through all the original documents?
Or are they... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ykfb6/eli5_why_are_snowden_documents_still_being/ | {
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"text": [
" > Or are they being deliberately released slowly, because releasing them all at once would be too much to process?\n\nSort of this. If he dumped them all at once, a lot of the controversial-but-not-r... | [] | [] | [
[],
[
"https://www.reddit.com/r/IAmA/comments/2wwdep/we_are_edward_snowden_laura_poitras_and_glenn/couqemk"
],
[]
] | |
2xhmb5 | I found this symbol in Palma, Mallorca just outside the Seu Cathedral. What does it mean? | Thank you in advance! [SOLVED] | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2xhmb5/i_found_this_symbol_in_palma_mallorca_just/ | {
"a_id": [
"cp05ozn",
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"text": [
"Here is some pics\n_URL_0_\n_URL_1_",
"You might have more luck in /r/whatisthisthing. That sub is dedicated to answering these kinds of questions. Still, please report back here if you get an answer. :)"
]
} | [] | [] | [
[
"http://i.imgur.com/3oVZPlH.jpg",
"http://i.imgur.com/XWXBTKm.jpg"
],
[]
] | |
2qpjn2 | Were the Romans Really as Brutal and Cruel as we Think? | Lately I've been thinking about how brutal the romans are depicted, were they really that cruel? I don't just mean slavery and the other things they did im talking about mass infanticide, genocide, war rape, Massacres and other horrible things. Were they really THAT barbaric? if so why? What caused them to become so br... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2qpjn2/were_the_romans_really_as_brutal_and_cruel_as_we/ | {
"a_id": [
"cn8aqyp",
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8
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"text": [
"I've never heard anything about genocide by Romans, do you have a source for that because it sounds interesting.",
"They certainly had a mentality of ''might is right'' that led to brutally cruel things. I forget the exa... | [] | [] | [
[],
[]
] | |
exgr7e | how does music royalty work? how do the music companies keep track of how many times a song is played? | Pun unintended | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/exgr7e/eli5_how_does_music_royalty_work_how_do_the_music/ | {
"a_id": [
"fg84d3q"
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"score": [
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"text": [
"Absolute speculation and close approaches, but with Spotify and YouTube (or any streaming platform) things change because you have more tracking. \n\nWhen it comes to tv/radios they send a list of the songs they've played and then, whoever pays t... | [] | [] | [
[]
] | |
5iei6y | why is censoring on facebook, twitter, reddit, or even banning products on amazon, or ebay considered an assault on "freedom of speech"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5iei6y/eli5_why_is_censoring_on_facebook_twitter_reddit/ | {
"a_id": [
"db7jhl1"
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"score": [
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"text": [
"The idea of free speech is often abused and misinterpreted. You can't say whatever you want on any social media site just like you can't walk into a store and start screaming obscenities. Facebook and Reddit and every other site owned by any co... | [] | [] | [
[]
] | ||
63p9gi | Did people in ancient and medieval times have anything comparable to hobbies? | Obviously the living standard of most humans has reached a point where we are able to spend vast amounts of time on recreational activities. I am wondering however if people in the medieval era ever had the money or time to peruse interests other than their profession and taking care of necccesities such as feeding one... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/63p9gi/did_people_in_ancient_and_medieval_times_have/ | {
"a_id": [
"dg40d4h"
],
"score": [
2
],
"text": [
"Stitching patterns into fabric (embroidery) was something that both lower and higher class members of society participated in. this was considered more of a women's activity, however, and I don't recall any accounts of men (outside of tailors) do... | [] | [] | [
[]
] | |
ce7s7t | why are laptop and tablet batteries often split into several smaller cells instead of having only one large cell? | Looking at teardowns of laptops and tablets, their batteries are usually comprised of several identical lithium ion cells placed right next to each other. Examples include the [iPad](_URL_0_) and the [Surface Pro](_URL_1_). To me, it seems it would be more cost efficient and more space efficient to have as few cells as... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ce7s7t/eli5_why_are_laptop_and_tablet_batteries_often/ | {
"a_id": [
"etzuokl"
],
"score": [
6
],
"text": [
"If you hook multiple cells together in series where you put positive to negative that increases the voltage but keeps the amperage the same. Three 1.5 volt AAA cells connected in series become a 4.5 volt battery with 1000 mAh. \n\nHooking them in... | [] | [
"https://d3nevzfk7ii3be.cloudfront.net/igi/ykGo1KW6mqKGDHRh.full",
"https://d3nevzfk7ii3be.cloudfront.net/igi/kuXc5emf23tWYCnE.full"
] | [
[]
] | |
7md9x0 | why do people pull their windshield wipers up during a snow storm? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7md9x0/eli5_why_do_people_pull_their_windshield_wipers/ | {
"a_id": [
"drt3v1s"
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"score": [
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],
"text": [
"To prevent the wipers from becoming frozen onto the windshield glass, if ice forms due to snow melting and refreezing."
]
} | [] | [] | [
[]
] | ||
u305c | Why didn't Asians build castles like the Europeans? | By Asian, I'm specifically talking about China, Korea and Japan.
In times of conflict, a castle seems like a pretty great thing to have and they're everywhere in Europe. However when I look at Asian castles, they look like palaces to my layman eyes and not as well suited for defence as their European counterparts. It ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/u305c/why_didnt_asians_build_castles_like_the_europeans/ | {
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"score": [
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"text": [
"Not a Far East expert, but I know at least the Japanese did build and use military castles. Look at the famou... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Osaka_Castle",
"http://en.wikipedia.org/wiki/Siege_warfare#Chinese_and_Mongols"
],
[],
[],
[
"http://en.wikipedia.org/wiki/Summer_palace",
"http://en.wikipedia.org/wiki/Jiayuguan_(pass\\)"
],
[],
[
"http://www.samuelhawley.com/imjinarticle2.html",
... | |
400afv | What is the dominant strain of historiography in the People's Republic of China? | In particular, how are primary and secondary school students educated in history? I would imagine Marxist historiography has some currency, but like socialism, it has acquired some peculiarly Chinese characteristics. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/400afv/what_is_the_dominant_strain_of_historiography_in/ | {
"a_id": [
"cyqg55o"
],
"score": [
2
],
"text": [
"Primary and middle-school students have Chinese history and World history classes.\nUntil recently, high-school students chose either an Arts or Science-based curriculum, with the Arts students continuing studying history, but I believe this has ... | [] | [] | [
[]
] | |
3d1pvz | As historians, do you ever feel burdened by your lack of knowledge certain histories? | To put it another way, as someone who is excessively aware of your particular field, do you feel very stupid/ignorant of everything else?
Seeing as history is so vast, and there is no way to understand *all* of it completely, how do you cope with that? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3d1pvz/as_historians_do_you_ever_feel_burdened_by_your/ | {
"a_id": [
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"score": [
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5,
7,
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"text": [
"Personally? Absolutely! When you realise the sheer, absurd depth of your field, and then r... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | |
1054h4 | what does economic freedom mean? | What is economic freedom? What determines which country has more economic freedom than another country? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1054h4/what_does_economic_freedom_mean/ | {
"a_id": [
"c6ah8eh"
],
"score": [
2
],
"text": [
"This question was [asked yesterday](_URL_0_). The short answer is that it doesn't mean anything, but a particular group uses the term in a particular way. They define it in their report."
]
} | [] | [] | [
[
"http://www.reddit.com/r/explainlikeimfive/comments/103ir7/eli5_what_is_economic_freedom/c6a53of"
]
] | |
dh01rt | Were Romans broadly aware of the First or Second Triumvirates at the time they were active, or would they have sounded like conspiracy theories? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/dh01rt/were_romans_broadly_aware_of_the_first_or_second/ | {
"a_id": [
"f3hqovb"
],
"score": [
516
],
"text": [
"There's a great deal of misinformation that keeps appearing and disappearing on this thread.\n\nYes, the Romans were aware of the Triumvirate, and of the agreement between Pompey, Caesar, and Crassus popularly called the \"first\" Triumvirate. ... | [] | [] | [
[]
] | ||
ttv9w | A way to test the "frame rate" aka flicker rate of the human eye | askscience | http://www.reddit.com/r/askscience/comments/ttv9w/a_way_to_test_the_frame_rate_aka_flicker_rate_of/ | {
"a_id": [
"c4pos0v"
],
"score": [
2
],
"text": [
"If you have a strobe that you can tune very finely... I have seen a few science projects that utilize that part of your brain, to make water look like stunt is going up. "
]
} | [] | [] | [
[]
] | ||
21a869 | How close were the Allies (specifically US) to losing WWII in Europe in terms of resources? | American History has always seemed to give me the impression (maybe I'm alone here) that after D-day the allies were always winning in a march toward Berlin. At the macro level, were there no setbacks? How much longer could the US economy have sustained all of the New Troops, Tanks, Bombers, Food, Ammo etc etc, had the... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/21a869/how_close_were_the_allies_specifically_us_to/ | {
"a_id": [
"cgb4y37"
],
"score": [
2
],
"text": [
"The allies suffered major supply problems after the invasion of Normandy and after breaking through into France and the low countries. This wasn't necessarily a problem with production so much as getting it to the necessary places. The rapid brea... | [] | [] | [
[]
] | |
1vrbv1 | if windows xp is still so popular, why is microsoft abandoning it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vrbv1/eli5_if_windows_xp_is_still_so_popular_why_is/ | {
"a_id": [
"cev0w4r",
"cev39c7"
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"score": [
4,
2
],
"text": [
"Because they don't make money supporting outdated software. They want people to buy the new versions. ",
"If by \"popular\", you mean that lots of people have it, then yes, it is popular. At schools and businesses where ... | [] | [] | [
[],
[]
] | ||
3sqy4e | If i was in a boat and dropped a one pound stone over the deepest part of the ocean (Mariana Trench?) What would happen to the stone as it decends? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/3sqy4e/if_i_was_in_a_boat_and_dropped_a_one_pound_stone/ | {
"a_id": [
"cwzvhik"
],
"score": [
2
],
"text": [
"Whether or not it would be crushed depends on the chemical makeup of the stone. The Mariana Trench is nearly 11 kilometers deep at its deepest point. That's a lot of pressure. The weight of all of the water above it would be pushing down on the s... | [] | [] | [
[]
] | |
2rq65b | why is it ok to draw muhammad because of a few radicals. but, it's not ok to put a cross upside down, burn the us flag, and so on? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rq65b/eli5why_is_it_ok_to_draw_muhammad_because_of_a/ | {
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"score": [
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3,
5,
2,
2,
2,
6
],
"text": [
"It isn't illegal to burn a US flag. Not aware of any laws against drawing crosses upside down.",
"We like to... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | ||
7ysggb | why when someone gets the all clear that they are cancer free they still have a high chance to get it back? | Why when someone gets rid of cancer their body doesn’t just to completely back to normal? Instead they have higher chances to get cancer back. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7ysggb/eli5_why_when_someone_gets_the_all_clear_that/ | {
"a_id": [
"duityl0",
"duiu5km",
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"score": [
3,
3,
2
],
"text": [
"Because we're never totally sure that every cancerous cell is out of your body and that another tumor won't form.",
"It's almost never 100% cancer free.\n\nDoctors generally call it \"in remission\"... | [] | [] | [
[],
[],
[]
] | |
86ft18 | Is it possible Elizabeth Bathory was innocent? | Elizabeth Bathory was accused of murdering up to 600 girls. However, there is suspicion that the evidence against her was exaggerated or outright faked. Does anyone know anything about that theory?
It would be really great if you wouldn't mind me quoting you in a paper I'm writing. I need to conduct an interview with ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/86ft18/is_it_possible_elizabeth_bathory_was_innocent/ | {
"a_id": [
"dw58zk5"
],
"score": [
10
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"text": [
"Hopefully someone will see and be able to respond to your question shortly, but in the meantime, you may find this earlier discussion helpful:\n\n[Was Elizabeth Báthory framed?](_URL_0_)"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/54qebz/was_elizabeth_b%C3%A1thory_framed/"
]
] | |
51j5ea | Have all the Earth's crusts recycled to the mantle at some point? | *Has all the Earth's crust [8] | askscience | https://www.reddit.com/r/askscience/comments/51j5ea/have_all_the_earths_crusts_recycled_to_the_mantle/ | {
"a_id": [
"d7cj4al"
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"text": [
"It all started as molten because of the massive amount of energy released by coalescing from a gas cloud, but after that no. That's why we can find rocks as old as from when the earth first solidified in places like Australia. [Jack Hills](_URL... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Jack_Hills"
]
] | |
5wbhyw | Can a black hole exert an electrical force? | If you say bombarded a black hole with an electron gun, and gave it a large negative charge, would the black hole then exert an electrical field on the surroundings, or would the electrical field somehow be negated by the immense gravity? | askscience | https://www.reddit.com/r/askscience/comments/5wbhyw/can_a_black_hole_exert_an_electrical_force/ | {
"a_id": [
"de8y6xp"
],
"score": [
8
],
"text": [
"Yes you can have [charged black holes](_URL_0_)."
]
} | [] | [] | [
[
"https://en.wikipedia.org/wiki/Reissner%E2%80%93Nordstr%C3%B6m_metric"
]
] | |
365w3p | How many planets have we surveyed for signs of a Technological civilization? | askscience | http://www.reddit.com/r/askscience/comments/365w3p/how_many_planets_have_we_surveyed_for_signs_of_a/ | {
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"text": [
"We dont really have the ability to do that to any great degree at this point. The only thing i can think that we can actively do is do a spectral analysis of a planets atmosphere ... | [] | [] | [
[],
[
"http://arxiv.org/pdf/0705.0993.pdf"
],
[
"https://en.wikipedia.org/wiki/James_Webb_Space_Telescope",
"http://arxiv.org/abs/1504.03418",
"http://phys.org/news/2015-04-advanced-civilizations-earth-obvious-galaxies.html"
],
[]
] | ||
2868y1 | Can we harvest energy from black holes? | askscience | http://www.reddit.com/r/askscience/comments/2868y1/can_we_harvest_energy_from_black_holes/ | {
"a_id": [
"ci7u031",
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"text": [
"There's the [Penrose process.](_URL_0_)",
"Somebody recently wrote a paper on this very topic: _URL_0_",
"Well you can't directly extract energy from a black hole, as nothing comes out of one (e... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Penrose_process"
],
[
"http://arxiv.org/pdf/1207.3342.pdf"
],
[
"http://en.wikipedia.org/wiki/Kardashev_scale"
]
] | ||
nh5ym | Why do I see a staticy grid when I close my eyes? | askscience | http://www.reddit.com/r/askscience/comments/nh5ym/why_do_i_see_a_staticy_grid_when_i_close_my_eyes/ | {
"a_id": [
"c393xjk",
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"score": [
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"text": [
"I have some moderate expertise about the visual system, but I'm not an authority, so this is just my best guess based on what I know.\n\nThe short answer is that, to my knowledge, we don't know *precisely* why this happens, ... | [] | [] | [
[
"http://www.artellmedia.com/afterimage.html",
"http://www.mitpressjournals.org/doi/abs/10.1162/089976602317250861"
],
[
"http://www.artellmedia.com/afterimage.html",
"http://www.mitpressjournals.org/doi/abs/10.1162/089976602317250861"
]
] | ||
31z6n2 | Why does samurai armour seem so badly designed compared to medieval european armour? | Every depiction of historical Japanese armour I've seen looks terribly impractical; it usually has huge gaps under the arms and lots of awkward looking panels sticking out all over the place. By comparison, European armour from around the same time fits snugly over the wearer's body and leaves very few gaps. The Japane... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/31z6n2/why_does_samurai_armour_seem_so_badly_designed/ | {
"a_id": [
"cq6ddja",
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"score": [
2,
2
],
"text": [
"It's a question of resource availability. Japan had less natural sources of iron and other suitable metals, meaning that what they had was used to make weapons. It's a contributing reason that swords were so tied to nobility... | [] | [] | [
[],
[
"https://upload.wikimedia.org/wikipedia/commons/7/76/Lamellar_lacing.gif"
]
] | |
1onmpv | What happened to the idea of invading another country to expand a current one? Details inside. | I mean we saw countries try to expand through invasion, WW1 WW2 then it took a break and then Korea and another break to Iraq 92'. It just seems like the idea to invade other countries to expand your borders either went out of style or into hiding. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1onmpv/what_happened_to_the_idea_of_invading_another/ | {
"a_id": [
"cctw59p"
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"score": [
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"text": [
"Wars of aggressions are internationally outlawed. From the charter of the United Nations, Article 2, §4:\n\n > All Members shall refrain (…) from the threat or use of force against the territorial integrity or political independence of any state... | [] | [] | [
[]
] | |
zzvqg | I need help with the relationship between feudal lords and their warriors in medieval times. | I need to create a comic book page displaying this relationship. The project is for English so we really didn't cover the life of a feudal lord and his warriors and I am having issues finding some sources. The warrior's dialogue should reflect his feelings about his life and about his lord. Then the lord should respond... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/zzvqg/i_need_help_with_the_relationship_between_feudal/ | {
"a_id": [
"c696yub"
],
"score": [
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"text": [
"Ok first things first we need to define our field a bit. The Anglo-Saxons were not by any strict definition 'feudal'. \"Feudalism' as an economic/political system only properly appears in England under the Normans after the conquest in 1066. S... | [] | [] | [
[
"http://www.fordham.edu/Halsall/sbook1n.asp",
"http://www.amazon.com/England-Norman-Angevin-1075-1225-History/dp/0199251010/ref=sr_1_1?s=books&ie=UTF8&qid=1347846138&sr=1-1&keywords=england+under+the+norman+and+angevin+kings",
"http://www.amazon.com/Feudalism-Anvil-Series-The/dp/088275... | |
11h6n8 | Is there a reason why Evangelical Christians sometimes have seizures during "prayer"? | I'm an atheist and just finished watching Jesus Camp and it's safe to say I'm shocked at what's going on. I saw kids having "seizures" during high intensity prayer and I was just wondering if it was something physiological or just psychological. What causes them to act that way? | askscience | http://www.reddit.com/r/askscience/comments/11h6n8/is_there_a_reason_why_evangelical_christians/ | {
"a_id": [
"c6mgj1g"
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"text": [
"Dr. Walter Cannon ([Study here](_URL_0_)) in 1942 studied cases of \"black magic deaths\". Cannon noticed that in cases of victims being \"cursed\" they had an exceptionally strong belief that they were doomed to die. He speculated that the victi... | [] | [] | [
[
"http://sinapsis.usach.cl/moodle/file.php/1/Papers/Original_Voodoo_Death.pdf"
]
] | |
2hrf2e | Ohio Native Americans. Looking for resources. | Best mound builders/Shawnee/Miami resources. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2hrf2e/ohio_native_americans_looking_for_resources/ | {
"a_id": [
"ckvegqu"
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"score": [
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"text": [
"**Moundbuilders**\n\n* [The Moundbuilders: Ancient Peoples of Eastern North America](_URL_12_)\n* [Gathering Hopewell: Society, Ritual, and Ritual Interaction](_URL_7_)\n* [The Scioto Hopewell and Their Neighbors: Bioarchaeological Documentation ... | [] | [] | [
[
"http://books.google.com/books?id=zOKgGQeETn4C",
"http://books.google.com/books?id=7DNLDlbQXaYC",
"http://books.google.com/books?id=qJY0AAAAMAAJ",
"http://books.google.com/books?id=PHXIeG6JyKEC",
"http://books.google.com/books?id=OrLuQQAACAAJ",
"http://books.google.com/books?id=dvOTo_bwmEU... | |
9eitx6 | how can straight talk use the same towers as verizon and other top tier providers? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9eitx6/eli5_how_can_straight_talk_use_the_same_towers_as/ | {
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"text": [
"Mobile phone companies own a lot of spectrum and towers, generally more than they can use (for now, things are growing). They sell ... | [] | [] | [
[],
[],
[],
[
"https://imgur.com/a/XE2blAn"
],
[],
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1ri9j9 | why would the israelis and saudis lobby *against* an interim nuclear deal between the us and iran? | It seems to me Israel and Saudi Arabia would benefit from such a deal, especially if it's seen through to a long term deal. No? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ri9j9/eli5_why_would_the_israelis_and_saudis_lobby/ | {
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"text": [
"A similar deal was given to North Korea in the 1990s with regard to their nuclear program. Now they have multiple nuclear weapons and have spread the technology to other countries like Pakistan, which have since built some nuclear weapons of the... | [] | [] | [
[]
] | |
yi0hl | How close can stars get? | I was wondering if there is a theoretical limit on how close two star systems can be and still host planets. For example, could two star systems be close enough that one could travel between them in a "reasonable" amount of time, say 5 years, at a "reasonably attainable" speed, say 0.25C. | askscience | http://www.reddit.com/r/askscience/comments/yi0hl/how_close_can_stars_get/ | {
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"score": [
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"text": [
"You have binary star systems in which each member can retain its own planets in their respective ecospheres.\n",
"Nasa found the first planet ever discovered in a binary star system about a year ago... | [] | [] | [
[],
[
"http://www.nasa.gov/mission_pages/kepler/news/kepler-16b.html"
],
[]
] | |
2edsah | Was it always a rude thing to ask about salaries? For example, would somebody in 19th century London be offended if I asked how much they made? | I've heard that this social taboo on disclosing salaries is merely successful brain washing by the anti union movements of the early 20th century. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2edsah/was_it_always_a_rude_thing_to_ask_about_salaries/ | {
"a_id": [
"cjypma7"
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"score": [
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"text": [
"A lot of 18th century literature talks about money and how much a person had \"settled\" on them per year. Jane Austen and similar writers focused on this a lot. Jane's characters always knew how much every person made and how much they could ... | [] | [] | [
[]
] | |
2g0mw1 | Which events led to enforcing speed limits on vehicles? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2g0mw1/which_events_led_to_enforcing_speed_limits_on/ | {
"a_id": [
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"text": [
"Speed limits are older than the \"horseless carriage\" itself; the Locomotive Act of 1861 in the UK limited steam-powered \"road locomotives\" (train engines designed to travel on roads instead of tracks) to a maximum speed of 10 mph. In 1865 the... | [] | [] | [
[
"http://www.nytimes.com/1998/12/25/us/montana-s-speed-limit-of-mph-is-overturned-as-too-vague.html"
]
] | ||
ly4kr | django and other web frameworks | What is a Web Framework. I've just started learnpythonthehardway, and i've encountered a few references to Django. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ly4kr/eli5_django_and_other_web_frameworks/ | {
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"text": [
"An ELI5 would require an entire chapter to cover the basics. I'm going to assume you understand certain concepts. If the explanation is still confusing, ask, and I'll post a more detailed response.\n\n**ELI20:** A framework ... | [] | [] | [
[
"http://docs.wxwidgets.org/stable/wx_odbcoverview.html#odbcoverview",
"https://www.djangoproject.com/",
"https://docs.djangoproject.com/en/1.3/ref/contrib/sitemaps/",
"http://www.wxpython.org/",
"http://docs.wxwidgets.org/stable/wx_wxsound.html#wxsound",
"https://docs.djangoproject.com/en/... | |
3f9sz8 | the chinese market crashes | What are the factors to the declining Chinese economy. How will this affect things in U.S. Europe etc. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3f9sz8/eli5_the_chinese_market_crashes/ | {
"a_id": [
"ctmry9l"
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"score": [
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"text": [
"This crisis comes along with the GDP growth of China slowing down. Chinese people started to invest in the stocks because of China's central bank decision to lower rate (the idea was to keep the growth going).\n\nThis created a bubble as many bus... | [] | [] | [
[]
] | |
17q60u | Prior to the Industrial Revolution, was England (or the United Kingdom) ever a similarly significant internationally? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17q60u/prior_to_the_industrial_revolution_was_england_or/ | {
"a_id": [
"c87uzt9"
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"score": [
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],
"text": [
"Just drawing off the top of my own head here before a proper answer comes in, England always had a strong navy after the middle ages, henry viii leaving the catholic church made England pretty significant and then holding off the Spanish armada w... | [] | [] | [
[]
] | ||
2kvl9x | Relation b/w speed of light and gravity? | My friend started debating (and arguing) with me recently, stating gravity has an influence on the speed of light and how speed of light depends on gravity.
His idea gave me a hint that he somehow maybe thinks gravity across all planetary bodies are same regardless their mass differences, but that's me guessing what's... | askscience | http://www.reddit.com/r/askscience/comments/2kvl9x/relation_bw_speed_of_light_and_gravity/ | {
"a_id": [
"clpfksh"
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"score": [
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"text": [
"This is actually a pretty complicated question. In special relativity, for inertial frames, the speed of light is a pure global constant. In general relativity, the issue becomes more muddled, here's what Einstein said about it: \n\n > \"... ac... | [] | [] | [
[
"http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html",
"http://physics.stackexchange.com/questions/133482/speed-of-light-in-general-relativity"
]
] | |
ay0a5e | When and why did militaries stop updating 'ceremonial' uniforms? | I'm speaking specifically about things such as the Guards at Buckingham Palace, and the uniforms used specifically on Parades, such as [this example of a French Republican Guard Cavalryman in 2007.](_URL_0_)
It's my understanding that these were, previously, merely just... The uniforms, and at some point the 'field' a... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ay0a5e/when_and_why_did_militaries_stop_updating/ | {
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"ehyormw",
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"score": [
287,
7,
31,
142
],
"text": [
"as a side question, are they pieces of dress uniforms that actually do tend to be updated from this diversion point or are they pretty much unchanged?",
"Many countries be... | [] | [
"https://i.redd.it/h3wf19k5rfk21.jpg"
] | [
[],
[
"https://imgur.com/a/GckprdA",
"https://imgur.com/gallery/b0Go8",
"https://www.youtube.com/watch?v=pzf9aHZmCAM&list=PL9-2UnSOnlzX6oQ7IK9e9s1N-zZ_V-Ole"
],
[
"https://www.reddit.com/r/AskHistorians/comments/axks54/why_do_the_uniforms_worn_by_the_army_and_navy/ehvt7m2/"
],
[
"h... | |
3wig0u | How romanticised is the 50s USA in comparison to how it actually was? | Except from the obvious downfalls- lack of women's rights, racist issues and all of that- was it actually a good time to live overall as a white straight man? Or was it a lot worse than we think? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3wig0u/how_romanticised_is_the_50s_usa_in_comparison_to/ | {
"a_id": [
"cxwkdbq",
"cxwmkg4",
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"score": [
46,
795,
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],
"text": [
"Could you be a little more specific with your question? Its not clear to me where, how, and why the 50's are being romanticized. There's a lot of dystopian views of the 50's in media - for exampl... | [] | [] | [
[],
[
"http://www.openculture.com/2014/11/the-red-menace-a-striking-gallery-of-anti-communist-propaganda.html",
"https://en.wikipedia.org/wiki/The_Organization_Man",
"https://en.wikipedia.org/wiki/McCarthyism",
"https://en.wikipedia.org/wiki/The_Communist_Party_USA_and_African_Americans",
"htt... | |
1onfp1 | can somebody explain ram for me? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1onfp1/eli5_can_somebody_explain_ram_for_me/ | {
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"http://downloadmoreram.com/"
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4zwnbo | At what point in history did the average person have access to clocks? | I know that ends up being more vague than it seems, but like, a fairly "modern" clock with two 'hands' and all (or similar, if there are other historically used methods of telling time I'm not aware of).
And by "Have access to" I mean that the average person could reach a clock within 5 minutes or so of where they wer... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4zwnbo/at_what_point_in_history_did_the_average_person/ | {
"a_id": [
"d700ie3"
],
"score": [
11
],
"text": [
"There are a couple ways to talk about this topic. One is a straightforward survey, such that is is possible, of what I guess I'd call clock density. I'm not sure such a precise study exists, but we do know that in the 14th and 15th centuries mec... | [] | [] | [
[]
] | |
f5iclc | why does bacteria in our mouth become harmful to our teeth, while bacteria inside our body is usually kept in check and co-exists within us? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f5iclc/eli5_why_does_bacteria_in_our_mouth_become/ | {
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"text": [
"When bacteria in the mouth eat food they poop acid. That acid mixes with food and saliva to make 'plaque'. The plaque sticks to your teeth. The acid in the... | [] | [] | [
[],
[],
[],
[],
[]
] | |
2mubez | why are juggalos so hated on reddit (and in general), when female prostitution is viewed as for the most part completely acceptable? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2mubez/eli5_why_are_juggalos_so_hated_on_reddit_and_in/ | {
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"c... | [] | [] | [
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"http://2.images.tosh.comedycentral.com/blog/2013/11/JuggaloMom.jpg",
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"http://www.metalinjection.net/wp-content/uploads/2012/06/juggalos.jpg"
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[
"http://v... | ||
2oj3nk | in golf/baseball/hockey, why does a follow through matter? since the ball has already made contact with the club/bat, why does it matter if the swing is continued or not? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2oj3nk/eli5_in_golfbaseballhockey_why_does_a_follow/ | {
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"text": [
"The advice is not given out as a way of influencing the ball after it's lost contact with the bat/stick/etc.\n\nThe advice is a way of mentally and physiologically improving the motion of the swing whi... | [] | [] | [
[],
[
"https://www.youtube.com/watch?v=y9CEuJ5e2cM"
],
[]
] | ||
4hbm4t | when did female breasts become a body part of sexual nature and why? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4hbm4t/eli5_when_did_female_breasts_become_a_body_part/ | {
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... | [] | [] | [
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"https://i.ytimg.com/vi/_nBstVBcTkU/maxresdefault.jpg",
"http://blog.kozzi.com/wp-content/uploads/2015/06/kozzi-Baby_profile-3167x2207.jpg",
"https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSr6DO6LchEOeMOBMLY-I8DrGYkDOcg-w3BQSvaR4HFMI5s... | ||
3ezr6a | Was the War of the World's broadcast the first instance of an entire nation being trolled? Have there been other similar events? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3ezr6a/was_the_war_of_the_worlds_broadcast_the_first/ | {
"a_id": [
"ctk3o15",
"ctk5551",
"ctk9lue",
"ctkkx69"
],
"score": [
9,
4,
5,
3
],
"text": [
"Here are some precedents you may find interesting:\n\nIn the 12th century, legends began to promulgate throughout Christian Europe of a figure named \"Prestor John\", rumored to be... | [] | [] | [
[
"https://books.google.com.ph/books?id=I57PTFyjyqgC&pg=PA110&dq=great+wall+of+china+hoax+1899&hl=en&sa=X&ei=h639UrnhEs2TkQWKsYGgBQ#v=onepage&q=great%20wall%20of%20china%20hoax%201899&f=false"
],
[],
[],
[]
] | ||
ar3yji | why can't you get an electrical shock from the neutral | You can get a shock from the hot wire (obviously) but even if there's a load on the circuit, I was told that you won't get shocked by the neutral because it's basically the same as the ground. The purpose of the neutral is to complete the circuit, but I don't understand what happens to the electricity after it passes t... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ar3yji/eli5_why_cant_you_get_an_electrical_shock_from/ | {
"a_id": [
"egkmlrm",
"egkmx2j",
"egksrlu",
"egl870k",
"egld4j8"
],
"score": [
7,
4,
2,
2,
2
],
"text": [
"In a balanced 3 phase system, neutral should carry little to no current. Ground is actually fail safe. Ground is there in case the equipment becomes electric... | [] | [] | [
[],
[],
[],
[],
[]
] | |
cp2ry3 | how do passwords work. specifically passwords to unlock devices such as smartphones or laptops | Just to make it simpler to explain how do iPhones(if this isn’t publicly known then any computing device is fine the iPhone is just an example) know which password is correct and unencrypt your data for access without having what your password is stored to be checked against. If your smart device does have a stored cop... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cp2ry3/eli5_how_do_passwords_work_specifically_passwords/ | {
"a_id": [
"ewmtiud",
"ewmtxxv",
"ewmu75j",
"ewmv1dh"
],
"score": [
2,
6,
2,
4
],
"text": [
"A iphone have a [Secure\\_Enclave](_URL_0_) that is a dedicated hardware for the password/fingerprint. It is not accessible to the general CPU except for calls that send it the pas... | [] | [] | [
[
"https://www.theiphonewiki.com/wiki/Secure_Enclave"
],
[],
[],
[]
] | |
1gv517 | how sports venues paid for with tax payer money maintain a monopoly on crappy, overpriced food when there are obvious alternatives? | I'm not sure of the contract structure of privately funded parks, MLB rules, or all that, but it seems stupid to continue to have people pay $6 for a budweiser and $8 for a crappy hamburger! I understand they wouldn't and haven't if they don't have to, but why don't they have to? And I think they should! Local restaur... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1gv517/eli5_how_sports_venues_paid_for_with_tax_payer/ | {
"a_id": [
"cao4e4s",
"cao89ty"
],
"score": [
5,
2
],
"text": [
"It's not a monopoly, it's more of a convenience issue. A restaurant can charge whatever they want, and if people don't want to pay, they can leave and find another restaurant.\n\nSports venues charge so much for food simply ... | [] | [] | [
[],
[]
] | |
61vy9e | Are reading and writing learned at the same time? | How uncommon would it be, if possible, for a person to learn to read, but not write, or to write, but not read?
That is to say, is it essentially the same set of mental skills / muscles? | askscience | https://www.reddit.com/r/askscience/comments/61vy9e/are_reading_and_writing_learned_at_the_same_time/ | {
"a_id": [
"dfi1jdh",
"dfi64y4"
],
"score": [
2,
2
],
"text": [
"As to whether it is possible to learn to read or write without learning the opposite, I would certainly think that both are possible. I don't have attested examples to cite, but I don't see why someone born without arms woul... | [] | [] | [
[
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC490731/pdf/jnnpsyc00083-0074.pdf",
"https://en.wikipedia.org/wiki/Dyslexia",
"https://en.wikipedia.org/wiki/Agraphia",
"https://en.wikipedia.org/wiki/Pure_alexia"
],
[]
] | |
3ch6lr | why is 300 parts per million for particulate matter in the atmosphere significant enough to cause health issues? | I live in Fairbanks and we're dealing with wild fire smoke in the city. Today the particulate count reached the 300 mark and everyone is advised to stay indoors as the smoke is so bad. With that kind of count, though, it doesn't sound like very much. Why does so little have such a huge affect? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3ch6lr/eli5_why_is_300_parts_per_million_for_particulate/ | {
"a_id": [
"csvhiv9"
],
"score": [
3
],
"text": [
"A couple of nanograms (10^-9 grams) of botulinum (the toxin that causes botulism) can be deadly. Everything can be lethal if you have enough of it, and some things are just really, really good at disrupting your body and preventing it from doing ... | [] | [] | [
[]
] | |
2skig0 | why does the us order the day and month of a date differently to other countries? i.e. today to me (in europe) it is the 15/01/15 not the 01/15/15. how did this slight, but significant, difference come about? | 9/11 should be 11/9 in Europe etc.... Why the reversal? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2skig0/eli5_why_does_the_us_order_the_day_and_month_of_a/ | {
"a_id": [
"cnqbb1c",
"cnqbm4b",
"cnqbyid",
"cnqccv0"
],
"score": [
7,
2,
4,
2
],
"text": [
"IIRC in the UK we do **day - > month - > year** as its the smallest in time to largest.\n\nThe US does **month - > day - > year** as there are fewer months than there are days... | [] | [] | [
[],
[],
[
"http://www.reddit.com/r/AskHistorians/comments/1t02dv/why_does_america_write_the_date_as_monthdayyear/ce35fub"
],
[
"https://books.google.com/ngrams/graph?content=November+11%2C11+November&year_start=1800&year_end=2000&corpus=18&smoothing=3&share=&direct_url=t1%3B%... | |
2dw3jc | when i sometimes go to sleep with my eyes closed and not moving, i know i'm not asleep. do i get any good quality rest compared if i'm sleeping? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2dw3jc/eli5when_i_sometimes_go_to_sleep_with_my_eyes/ | {
"a_id": [
"cjtn8k9",
"cjtp7h6",
"cjtqhj5",
"cjtwpd5"
],
"score": [
5,
2,
2,
2
],
"text": [
"If you're not asleep, then you're not getting the same quality rest as if you were sleeping. Your brain may appreciate the decrease in stimulation, and your muscles the rest, but i... | [] | [] | [
[],
[],
[],
[]
] | ||
5p3j4i | some jobs are unpleasant but fundamental to society (eg: janitor, bus driver). why aren't these the best paid jobs? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5p3j4i/eli5_some_jobs_are_unpleasant_but_fundamental_to/ | {
"a_id": [
"dco38rk",
"dco3ag0",
"dco58pf",
"dco7bge",
"dcoqf6s",
"dcoqnz2",
"dcp5xhi"
],
"score": [
86,
16,
14,
44,
3,
3,
3
],
"text": [
"Because anyone can do them. They are low skill and lots of people can fill that role.\n\nSometimes they do ge... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | ||
6iyx3e | if you have good credit, and pay your bills off every month, how do credit card companies make money off you? wouldn't they prefer customers with bad credit? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6iyx3e/eli5_if_you_have_good_credit_and_pay_your_bills/ | {
"a_id": [
"dja7ega",
"dja8h3t",
"dja8rzy",
"dja8wei",
"djaitxs"
],
"score": [
2,
17,
10,
7,
2
],
"text": [
"You almost hit the nail on the head. It's not that credit card companies prefer customers with bad credit, but they do prefer customers that carry a balance... | [] | [] | [
[],
[],
[],
[],
[]
] |
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