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 |
|---|---|---|---|---|---|---|---|---|---|
aufvdf | how do ice cream shops adjust their business models to survive the winter months? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aufvdf/eli5_how_do_ice_cream_shops_adjust_their_business/ | {
"a_id": [
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"score": [
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"text": [
"Sometimes you have to save money from the busy season to cover the slow season. Just like a farm only makes money at harvest the rest of the week year it's off of savings from the sale of the harvest. \n\nCut down on inventory, reduce labor are o... | [] | [] | [
[]
] | |
b5n68s | is a heavier vehicle (truck) or a lighter vehicle (empty truck) able to stop quicker? (momentum/weight = more traction?) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b5n68s/eli5_is_a_heavier_vehicle_truck_or_a_lighter/ | {
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"text": [
"Two identical trucks, each weighing 10,000 lbs empty, and one loaded with an additional 10,000 lbs of cargo - the empty truck will stop quicker. There is simply a lot less mass to decelerate. Force is... | [] | [] | [
[],
[],
[]
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f4kyz | Does living in the city have an effect on the immune system? | I have to admit that my knowledge about our immune system and how it can change is close to zero.
Does living in the city have an effect on the immune system? Positive or negative?
I'm thinking mainly of living in the inner parts of a city in the Western world, say, a European capital, with a fair amount of car traff... | askscience | http://www.reddit.com/r/askscience/comments/f4kyz/does_living_in_the_city_have_an_effect_on_the/ | {
"a_id": [
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"text": [
"There are a lot of factors influencing this. You're thinking about car traffic and pollution, but there are other things such as close proximity to many different people that affects your immune system as well.\n\nWith regards to pollution, you'd... | [] | [] | [
[]
] | |
4bf869 | how does the flu virus adapt every year so that our body can never fully prevent it from happening? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4bf869/eli5_how_does_the_flu_virus_adapt_every_year_so/ | {
"a_id": [
"d18p0a6"
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"text": [
"Think of it like a plant, there can be multiple strains of the same plant, but they arent the exact same, but in their base, they are the same, hence being the same species. It is very similar in the flu. There are different strains of it, which ... | [] | [] | [
[]
] | ||
7mfdjo | why can we not just drain the energy/radiation from uranium rods so that they are not as deadly when we dispose of them/store them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7mfdjo/eli5_why_can_we_not_just_drain_the/ | {
"a_id": [
"drth3bf",
"drthib7"
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"score": [
3,
4
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"text": [
"Because the rate at which the energy is released is not under our controlled. It is rooted in fundamental constants of the universe and we have no way of changing it.",
"So you need to have some basic concept of what thi... | [] | [] | [
[],
[]
] | ||
y6t1x | What causes a filled water bottle to 'recoil' when it is being emptied? | By being emptied, I mean turned so the neck is facing the ground.
What are the physics behind the 'recoil'? | askscience | http://www.reddit.com/r/askscience/comments/y6t1x/what_causes_a_filled_water_bottle_to_recoil_when/ | {
"a_id": [
"c5sv23o"
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"score": [
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"text": [
"Can you expand on what you mean by recoil?\n\nIs it when you turn a full bottle upside down, how it empties in bursts and when a burst finishes, the bottle raises slightly?"
]
} | [] | [] | [
[]
] | |
uliik | - why does 9 * 1/9 not equal 1? | So 1/9 = .1 repeating. Times that by nine gives .9 repeating. But 9/9 equals 1.
Please, ELI5. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/uliik/eli5_why_does_9_19_not_equal_1/ | {
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"text": [
"It does. .9 repeating equals 1.\n\nIf you don't believe me, consider this. Any numbers that aren't equal must have some nonzero difference, right? So if 1 an... | [] | [] | [
[],
[],
[],
[],
[]
] | |
1493ky | why does overvolting make overclocking more stable? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1493ky/why_does_overvolting_make_overclocking_more_stable/ | {
"a_id": [
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"score": [
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2,
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"text": [
"This subject is way too complex to ELI5. But here's a source that actually explains how the innards of a processor work.\n\n_URL_0_\n\nEssentially the increase in clock speed requires a higher threshold... | [] | [] | [
[
"http://www.pctechguide.com/cpu-architecture/principles-of-cpu-architecture-logic-gates-mosfets-and-voltage"
],
[],
[]
] | ||
lcpjn | oxytocin and its role in pair-bonding in human sexual relationships | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/lcpjn/eli5_oxytocin_and_its_role_in_pairbonding_in/ | {
"a_id": [
"c2rlnie",
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"score": [
3,
3
],
"text": [
"Happy to explain this one but I'll need you to be a bit more specific about what you want to understand. Are you asking the how or why?",
"Happy to explain this one but I'll need you to be a bit more specific about what ... | [] | [] | [
[],
[]
] | ||
1nv5wr | How accurate were maps at the start of the 19th century? How much did the accuracy of maps improve after spy satellites could see exactly what the world looked like? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1nv5wr/how_accurate_were_maps_at_the_start_of_the_19th/ | {
"a_id": [
"ccmcwgv"
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"score": [
11
],
"text": [
"Map historian (among other hats) here. We need to define \"accuracy\" before we can really talk about relative terms; all maps are representations, so the accuracy is a subjective thing connected to the use of the map. It's already a spheroida... | [] | [] | [
[
"http://www.lib.utexas.edu/maps/historical/world_cyclopedia_1820.jpg",
"http://www.lib.utexas.edu/maps/"
]
] | ||
ev4j8j | Did Pre-Columbian Native Americans Have Cauldrons? | This is going to sound a bit weird, so please bear with me. I was reading up on [Irish stew](_URL_0_) and noted the idea that cauldrons as a cooking technology weren't introduced to Europe until relatively late.
So this makes me curious about pre-European contact Native Americans. I know metalwork was limited on the ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ev4j8j/did_precolumbian_native_americans_have_cauldrons/ | {
"a_id": [
"ffti7dw"
],
"score": [
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"text": [
"So, are you asking whether Natives made soups and stews, or whether natives used metal cookware for them specifically?\n\nThe first answer is quite easy to answer. In both the Triple Alliance and Inca Empire, soups and stews were cooked, seemingl... | [] | [
"https://en.wikipedia.org/wiki/Irish_stew"
] | [
[]
] | |
thwot | what causes tattoo ink to stay in skin, when we are constantly shedding skin flakes? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/thwot/what_causes_tattoo_ink_to_stay_in_skin_when_we/ | {
"a_id": [
"c4mqynm",
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"score": [
24,
2,
2
],
"text": [
"The ink is injected much deeper in the skin. You usually lose the first few layers of skin, the ink is injected into the deepest layers of skin.",
"There are a few layers of skin on your body, the... | [] | [] | [
[],
[],
[]
] | ||
1wu5cr | Cats were originally domesticated because they kill vermin, and dogs were useful as guards and for hunting. They helped take care of us. In modern times, we completely take care of our pets. They're our family instead of our tools. When did this change? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1wu5cr/cats_were_originally_domesticated_because_they/ | {
"a_id": [
"cf5hlm0"
],
"score": [
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"text": [
"I wouldn't say they aren't useful tools to the family. Put a couple cats in a warehouse and see all the vermin disappear. Likewise, let your cat in the garage and see that annoying mouse disappear forever. And of course, tons of people own dogs t... | [] | [] | [
[]
] | ||
28cemx | Why does air blow in the back windows of a car and out the front? | If you open the driver side window and the diagonally opposite window equal amounts, the air will flow in the back window and out the front window regardless of how much your open them or the order you open them in. I imagine it has to do with the turbulence around the car, but I'm not really sure. | askscience | http://www.reddit.com/r/askscience/comments/28cemx/why_does_air_blow_in_the_back_windows_of_a_car/ | {
"a_id": [
"cia13k5"
],
"score": [
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"text": [
"Air will flow from high pressure regions to low pressure regions. If what you say occurs, then it must be because the air pressure outside your rear window is higherr than the air pressure outside your front window.\n\nAir flow around a car is t... | [] | [] | [
[]
] | |
2fcuru | trading gold and silver commodities | I am trying to get into the commodities market and I need more knowledge. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2fcuru/eli5trading_gold_and_silver_commodities/ | {
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"score": [
3,
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2
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"text": [
"If you are putting money on the line, I wouldn't bother with ELI5. Go ask this question in an investing community (maybe [r/PersonalFinance](_URL_0_) would help you?).",
"If y... | [] | [] | [
[
"http://www.reddit.com/r/personalfinance/"
],
[],
[],
[]
] | |
dir5k6 | What's the difference between relativistic quantum mechanics and quantum field theory? | askscience | https://www.reddit.com/r/askscience/comments/dir5k6/whats_the_difference_between_relativistic_quantum/ | {
"a_id": [
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"text": [
"To put it simply, a quantum field theory is a quantum theory that is both:\n\n1. Relativistic, and\n\n2. Allows for creation and destruction of particles.\n\nThere also exists relativistic quantum mechanics without particle... | [] | [] | [
[],
[]
] | ||
1u14bn | How would a guaranteed income affect inflation? | There has been a lot of talk recently -- especially in /r/futurology -- about the prospect of implementing guaranteed income in the US. Many people have called for it, and other countries seem to be having success with similar programs (See: _URL_0_)
I agree with the basic premise of the guaranteed income, but to me i... | askscience | http://www.reddit.com/r/askscience/comments/1u14bn/how_would_a_guaranteed_income_affect_inflation/ | {
"a_id": [
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"score": [
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"text": [
"Hey I read your links and read through the answers here. I don't think any answers here are satisfactory.\n\nSo there are a few things to address here. First I want to clarify what inflation is. Second I'll address methods of wage redistributi... | [] | [
"http://www.theglobeandmail.com/news/world/what-would-robin-hood-do-how-cash-handouts-are-remaking-lives-in-brazil/article16113695/"
] | [
[
"http://en.wikipedia.org/wiki/New_Keynesian_economics#Policy_implications",
"http://en.wikipedia.org/wiki/Welfare_economics",
"http://en.wikipedia.org/wiki/Quantitative_easing",
"http://en.wikipedia.org/wiki/Money_creation"
]
] | |
5odami | Why did the Nazis attempt to remove any evidence of the camps existing? | Were the Nazis aware of the atrocities they were committing and were attempting to avoid being charged for war crimes?
| AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5odami/why_did_the_nazis_attempt_to_remove_any_evidence/ | {
"a_id": [
"dcjze7m"
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"text": [
"The destruction of the extermination camps, the cremation of bodies, and the excavation and cremation of shooting victims over the course of 1942-43/44 was constellation of different factors that aligned that pushed the Germans towards this aspec... | [] | [] | [
[
"http://avalon.law.yale.edu/wwii/moscow.asp"
]
] | |
1cfbyr | How was sliced bread first received by the general public? Was it really considered one of the "greatest inventions?" | I'm of course asking about packaged pre-sliced bread. Was it immediately accepted as a great invention (per the phrase "the greatest thing since sliced bread"), or were people skeptical about it at first? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1cfbyr/how_was_sliced_bread_first_received_by_the/ | {
"a_id": [
"c9fyrgu",
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"score": [
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"text": [
"Automatic sliced bread was introduced to Chillicothe, Missouri in 1928 via a machine by Otto Rohwedder in Frank Bench's Chillicothe Bakery. The power driven multi blade slicer dated back to 1917, but had no takers until Be... | [] | [] | [
[],
[]
] | |
5ik8t2 | why are car model years not displayed on the car itself? | So I've always wondered why the make, model, and trim package of a car is displayed on the back of it, but nowhere to be found is the model year. I feel like for a lot of people (like myself) it's hard to distinguish the specific year of a car just by looking at it. I know you can determine this from the VIN, but tha... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ik8t2/eli5_why_are_car_model_years_not_displayed_on_the/ | {
"a_id": [
"db8sfjd",
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"score": [
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"text": [
"You can look at the owner's manual in the glovebox. \n\nPutting dates on things is essentially an expiration date. People don't want you to know their nice looking car is 8 years old.",
"Because pe... | [] | [] | [
[],
[],
[]
] | |
6u5zdy | why are things that are hot to the touch, not so hot to the mouth i.e. coffee? | I've always wondered why I can drink a really hot cup of coffee and the cup is really hot to the touch, to the point where I have to put it down if I'm not holding by the handle, but when I sip it, it doesn't burn my mouth. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6u5zdy/eli5_why_are_things_that_are_hot_to_the_touch_not/ | {
"a_id": [
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"score": [
2,
10,
2,
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"text": [
"Because you're sipping that coffee very very lightly. You can easily splash a few drops of the same coffee on your hand and not feel a thing. If you took coffee that was 190 degre... | [] | [] | [
[],
[],
[],
[]
] | |
39458f | how do particles 'know' when they've been observed? | And what counts towards 'observing' them? Bacteria? Animal life? What? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/39458f/eli5_how_do_particles_know_when_theyve_been/ | {
"a_id": [
"cs07jrb",
"cs08mor"
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"score": [
12,
2
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"text": [
"The whole \"particles act differently when they are observed\" is misleading. A more accurate description is \"particles act differently when they are measured.\" This is because every method we have (or can imagine) of o... | [] | [] | [
[],
[]
] | |
4s0tzc | Looking for some recommendations for these specific topics... | I am currently reading *Training for Policy Makers* (Dror, 2006), in which the author accentuates the importance of history for future leaders:
> [...] one or two books providing a vista of long-term history, a text or two on the dynamics of history, and another book or two in philosophy of history and historiograph... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4s0tzc/looking_for_some_recommendations_for_these/ | {
"a_id": [
"d55nc81"
],
"score": [
3
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"text": [
"Can you clarify what type of policymaking you're wanting to get into? While I can give you some suggestions for, say, foreign policy, I won't be of much help if you're interested in, for example, urban redevelopment.\n\nI wouldn't suggest you rea... | [] | [] | [
[]
] | |
5iji0n | How do those little winter birds, like chickadees, not freeze to death, and, if they are just little well-insulated furnaces, where does all their energy come from, just seeds? | askscience | https://www.reddit.com/r/askscience/comments/5iji0n/how_do_those_little_winter_birds_like_chickadees/ | {
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"score": [
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"text": [
"1. They insulate themselves from air by floofing their feather... | [] | [] | [
[
"http://birdnote.org/show/why-birds-feet-dont-freeze"
],
[
"http://scholars.wlu.ca/cgi/viewcontent.cgi?article=1035&context=biol_faculty&sei-redir=1&referer=http%3A%2F%2Fwww.google.ca%2Fsearch%3Fclient%3Dsafari%26rls%3Den%26q%3Dwinter%2Bsurvival%2Brate%2Bof%2Bblack%2Bcapped%2Bchickadee%2BC... | ||
7rjdhu | si definition of a second | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7rjdhu/eli5si_definition_of_a_second/ | {
"a_id": [
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"score": [
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"text": [
"Basically, they took what they knew as a second, and because everyone has slightly different biological clocks, they needed a standard definition.\n\nThere were 3 ways to compute this.\n\n1. 1/60th of a minute, which was 1/... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Caesium"
]
] | |
1mkwfo | Costa Concordia Salvage: Was there any new technology developed or had never been tested that was required for this operation? | [Here's a BBC news link about the operation.](_URL_0_) | askscience | http://www.reddit.com/r/askscience/comments/1mkwfo/costa_concordia_salvage_was_there_any_new/ | {
"a_id": [
"cca7fpm"
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"score": [
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"text": [
"The main techniques used in the Costa Concordia's salvage were hot-tapping to safely remove fuel from within the ship, a process which has existed for at least over a decade and involves the pumping water into the ship to maintain equal pressur... | [] | [
"http://www.bbc.co.uk/news/world-europe-24121480"
] | [
[]
] | |
rfa7v | what is it about how birds fly that humans haven't been able to replicate for human flight? | I'm talking about human-powered or human-assisted wings. Flying machines are still very expensive, too large, and not very portable. Gliders have some of the same problems. What does it take to get a human being airborne from a standing position like a bird? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/rfa7v/eli5_what_is_it_about_how_birds_fly_that_humans/ | {
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2,
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"text": [
"Hollow bones, and a whole lot of other things that make flying animals lightweight and aerodynamic. ",
"Light, hollow bones. Humans are simply too damn heavy.",
"birds hav... | [] | [] | [
[],
[],
[],
[
"http://en.wikipedia.org/wiki/Argentavis",
"http://en.wikipedia.org/wiki/Wandering_Albatross",
"http://www.politedissent.com/archives/987",
"http://www.baenebooks.com/chapters/0743498747/0743498747___2.htm"
]
] | |
5trz7k | do car headlights move faster than the speed of light? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5trz7k/eli5_do_car_headlights_move_faster_than_the_speed/ | {
"a_id": [
"ddokm51",
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"score": [
2,
2
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"text": [
"No, the headlights will always travel at speed of light because speed of light is constant. So, in order to compensate, the moving object will experience time dilation.",
"Nope, photons travel at the speed of light for w... | [] | [] | [
[],
[]
] | ||
s1hri | Why do animals (including humans) lick their wounds? | askscience | http://www.reddit.com/r/askscience/comments/s1hri/why_do_animals_including_humans_lick_their_wounds/ | {
"a_id": [
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"text": [
"Saliva has natural antiseptic in it, which helps keep the wound uninfected. Also it can remove bits (like gravel from a graze) which could harbour infection.... | [] | [] | [
[],
[
"http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(05)63429-0/fulltext"
],
[
"http://en.wikipedia.org/wiki/Wound_licking"
],
[],
[]
] | ||
3s2i3o | why do people abandon houses? | For example, I grew up in a very rural area in western Wisconsin and the ridges and valleys are peppered with abandoned homes, which have clearly been vacant for decades. Any idea why? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3s2i3o/eli5_why_do_people_abandon_houses/ | {
"a_id": [
"cwtgv71",
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"score": [
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2
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"text": [
"There's a variety of things that happen. Sometimes a person moves away, or the house is inherited by a faraway relative. If these people can't or don't want to be landlords, and are unable to sell the house, they're stuck wi... | [] | [] | [
[],
[]
] | |
66xif0 | why does machine-made ice cubes have holes in them? | When I make ice cubes at home (in a tray) the cubes are perfectly square, but at restaurants the ice cubes have a hollow part on one of the sides... why? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/66xif0/eli5_why_does_machinemade_ice_cubes_have_holes_in/ | {
"a_id": [
"dgm070z",
"dgm0ltu"
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"score": [
3,
9
],
"text": [
"Because that machine makes ice by taking a metal rod, chilling it to below freezing, and then spraying water onto it, where the water freezes. When the ice is thick enough, the machine briefly heats the rod- the inner layer ... | [] | [] | [
[],
[
"http://cdn.newair.com/kb/wp-content/uploads/2013/07/ice-1-300x200.jpg"
]
] | |
32kt5m | what is the difference, if any, between extra strength tylenol over the counter vs. prescription? | I have a whole bottle at home, why would I spend the money on the prescription version? Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32kt5m/eli5_what_is_the_difference_if_any_between_extra/ | {
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2,
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"text": [
"Prescription gives you a higher dosage, so for example instead of two pills, you only have to take one. And, at least in the U.S., it's ... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
6zo38q | why does agitating (rotating/stirring) concrete prevent it from setting? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6zo38q/eli5_why_does_agitating_rotatingstirring_concrete/ | {
"a_id": [
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"The process of concrete curing is essentially the binding of molecules/polymers chaining together. The higher the concentration of bound molecules the harder the concrete gets. Stirring a polymer or a solution that is in t... | [] | [] | [
[],
[]
] | ||
q5wi8 | What were the most important socio-political effects of the Little Ice Age? | Been doing some reading on the influence of climate on civilization, and I'd love to hear a historian's take. Thanks! :) | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/q5wi8/what_were_the_most_important_sociopolitical/ | {
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"text": [
"You gotta be more specific. The Little Ice Age lasted from the Middle Ages to the Victorian Era and you'd expect that for such a long period of time, with specific dips in temperature, great changes hav... | [] | [] | [
[],
[],
[]
] | |
36zym4 | Did ancient Egyptians travel to the United States? | Just watched a show, seemed pretty questionable, that stated that there is a cave in the Grand Canyon with ancient Egyptian relics, because they had traveled there. Apparently, some guy made a boat out of papaya to test to see if it was possible, and I guess it was.
Is there any indication this actually happened? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/36zym4/did_ancient_egyptians_travel_to_the_united_states/ | {
"a_id": [
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"text": [
"There have been no ancient Egyptian artifacts found *in situ* anywhere in the New World. [Thor Heyerdahls](_URL_0_) expedition from South America across the Pacific in 1947 merely showed that long distance sea travel in the distant past was possi... | [] | [] | [
[
"http://en.m.wikipedia.org/wiki/Thor_Heyerdahl"
]
] | |
8xo7ko | this may be a dumb question but how does a car/truck tire handle the weight from the vehicle and not pop? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8xo7ko/eli5_this_may_be_a_dumb_question_but_how_does_a/ | {
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"text": [
"They're simply really big. The larger the area you have touching the ground, the more weight you can have.\n\nLet's say you put three tons balancing on a needle. You're taking all those three tons, and concentrating them on ... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Stress_(mechanics\\)"
]
] | ||
62755n | as an overweight male, why it's better for me to gain muscle via weights to lose weight than to do just cardio & reducing calorie intake | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/62755n/eli5_as_an_overweight_male_why_its_better_for_me/ | {
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"It isn't. You should do weights and cardio and reduce caloric intake. Better yet do some intermittent fasting, cut out all sugar, drop carbs to around 100-15... | [] | [] | [
[],
[],
[],
[
"https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=caloric+need+calculator&*"
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[]
] | ||
9z42vk | What was the experience of the indigenous peoples of the Americas to lose so many of their members to colonialism, slavery, and diseases? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9z42vk/what_was_the_experience_of_the_indigenous_peoples/ | {
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"text": [
"*part 1*\n\nThis is a huge area and topic, where experiences would vary accordingly - I'll focus mostly on central Mexico as per usual, although there are many parallels with other parts of Spanish America. Overall, the easy answer would be that... | [] | [] | [
[]
] | ||
2z6m70 | What is your personal recommendation for an audiobook on the history of the United States? | I'll be driving a bunch. I'd rather not pay more than $50. I looked at the book list in the sidebar but it seemed mostly geared toward specific subjects.
Bonus points if the author/reader is engaging and/or funny. My favourite popular history author so far has been the Swedish _URL_0_ - who is apparently no stranger t... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2z6m70/what_is_your_personal_recommendation_for_an/ | {
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"score": [
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"text": [
"Have you considered any of the Great Courses series of lectures on Audible?"
]
} | [] | [
"https://sv.wikipedia.org/wiki/Herman_Lindqvist"
] | [
[]
] | |
1yix79 | Is there a way to measure the amount of matter\mass in the universe? Is it a finite amount? | askscience | http://www.reddit.com/r/askscience/comments/1yix79/is_there_a_way_to_measure_the_amount_of/ | {
"a_id": [
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"text": [
"We can't measure anything outside of the observable universe per definition, so we don't know if it's finite. Our observable universe should have about [1.45×10^53 kg](_URL_0_) of ordinary mass (excluding dark matter).",
... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Observable_universe#Estimates_based_on_steady-state_universe"
],
[]
] | ||
1i6yyy | When I close my eyes, am I flexing or relaxing my eyelid? | askscience | http://www.reddit.com/r/askscience/comments/1i6yyy/when_i_close_my_eyes_am_i_flexing_or_relaxing_my/ | {
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"cb1pegr",
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"text": [
"You are contracting the [orbicularis oculi muscles](_URL_0_) when you forcibly close your eyes.",
"You're not doing anything to the eyelid; what you are doing are flexing/relaxing muscles connected... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Orbicularis_oculi_muscle"
],
[
"http://en.wikipedia.org/wiki/Orbicularis_oculi_muscle",
"http://en.wikipedia.org/wiki/Levator_palpebrae_superioris_muscle"
],
[]
] | ||
9syky2 | Why do mitochondrial diseases affect different parts of the body? | Our mitochondria is the same all over our bodies , and as far as i know its genes are not regulated (they all are expressed everywhere) so why do some disorders affect only some parts of your body ? | askscience | https://www.reddit.com/r/askscience/comments/9syky2/why_do_mitochondrial_diseases_affect_different/ | {
"a_id": [
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"text": [
"The mitochondria plays an important role in a lot of cellular processes, some of which only occur in a specific type of cell. The least cell specific process is metabolisn; however, different cells specialize in different types of metabolic proc... | [] | [] | [
[]
] | |
15lu40 | How can radio waves be SO well spread? | I have signal everywhere I go, the gym, the mall, my three story indoor school. It's ridiculous. How does it seep in so well? And it's not just one thing, it's T-Mobile, AT & T, Sprint, Verizon, MetroPCS, U.S. Cellular, and so on. Not just a phone service either, its phone and access to the vast internet. HOW?!?! Yes, ... | askscience | http://www.reddit.com/r/askscience/comments/15lu40/how_can_radio_waves_be_so_well_spread/ | {
"a_id": [
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"text": [
"[Lots of base stations](_URL_3_). Here's a site that will [show them for your area](_URL_1_). [Here's another one that takes a while to process](_URL_2_), but it has more detailed information. In a 4 mile radius of my zip co... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Cellular_repeater",
"http://www.cellreception.com/",
"http://www.antennasearch.com/sitestart.asp?sourcepagename=reportviewer2&prevsessionidnum=397996696&prevordernum=1&previtemnum=1&sectionname=towerreview&pagename=towerreview&pagenum=1&cmdrequ... | |
1rlnwj | when i charge a phone, unplug it, then turn the phone off, how is the energy being stored within the phone? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rlnwj/eli5_when_i_charge_a_phone_unplug_it_then_turn/ | {
"a_id": [
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"text": [
"Chemically.\n\nWhen you charge your battery, the stuff inside it undergoes a chemical reaction. This reaction can be reversed, yielding a current from one pole of your battery to the other when you conn... | [] | [] | [
[],
[],
[]
] | ||
6fj4w1 | Arthurian legends aside, were there any historical quests for the holy grail? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6fj4w1/arthurian_legends_aside_were_there_any_historical/ | {
"a_id": [
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"text": [
"This might not be what you had in mind exactly but meet Otto Rahn, German medievalist, SS-Obersturmführer, and Grail Hunter for the Nazis. Rahn himself is a rather marginal figure even within Nazi occultism and while commonly held that in the ea... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/49rn50/how_did_catharism_start_develop_and_become_so/",
"https://www.reddit.com/r/AskHistorians/comments/1hione/did_any_cathars_survive_the_albignesian_crusade/"
]
] | ||
3gs46l | how is tesla doing so well while losing $4,000 per car? is that loss misleading? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3gs46l/eli5_how_is_tesla_doing_so_well_while_losing_4000/ | {
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"i would also like to know how they are selling cars, when they arent allowed to in most states because they arent a dealership, and apparently people cant buy cars straight from the wholesaler because ... | [] | [] | [
[],
[],
[
"http://watson-ne.ws/#/f3840e2f118a25c34b4e49bbe51ffbb9"
]
] | ||
ev7xs | GMO sequences? | Hey guys, I am doing a project involving genetically modified organisms for school and I am having trouble finding the actual sequences for the 35s promoter from cauliflower mosaic virus and the nos terminator from agrobacterium. I know these are the most commonly used promoter and terminator sequences for GMOs, but I'... | askscience | http://www.reddit.com/r/askscience/comments/ev7xs/gmo_sequences/ | {
"a_id": [
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"text": [
"Nice try terrorists. Just kidding let's see what I can do.\n\nI have the full sequence of the [Cauliflower Mosiac Virus](_URL_3_). Look in the article it has a full sequence. Also I googled 35S promoter and [This](_URL_1_) was the first result. I... | [] | [] | [
[
"http://www.ncbi.nlm.nih.gov/nuccore/HI650218.1",
"http://www.patentlens.net/daisy/promoters/242/g1/250.html",
"http://www.ncbi.nlm.nih.gov/sites/entrez",
"http://www.cell.com/abstract/0092-8674\\(80\\)90136-1"
]
] | |
1klm7z | When will we be able to industrialize graphene and when will the consumer likely see graphene in household products such as computers? | askscience | http://www.reddit.com/r/askscience/comments/1klm7z/when_will_we_be_able_to_industrialize_graphene/ | {
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"http://www.nist.gov/pml/div683/conference/upload/Diebold_final.pdf"
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[],
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aupioy | if we can't get under 7nm with silicon why are intel/amd not building bigger dies with more transistor instead of always shrinking? | If a regular CPU consume 95W today in 14nm, why aren't they building HUGE cpu that consume 3-400 watts? all we would have to do is having a bigger PSU and more efficient cooling. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aupioy/eli5_if_we_cant_get_under_7nm_with_silicon_why/ | {
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"text": [
"Because heat is a never ending enemy, and you'd have to find a way to dissipate all that heat.\n\nPlus you only need a certain number of transistors to do each instruction. More ... | [] | [] | [
[],
[],
[],
[]
] | |
qn6mj | At what point in evolution on earth did cells or their earlier counterparts begin to have a drive for survival, and want themselves and their descendants to become more numerous? How did this evolve? | I was wondering at what point did cells suddenly think that "Me and my descendants deserve to be here more than everyone else on earth", and start evolving to outcompete other cells. Has this competetion always been there?
I was wondering because without this drive for survival, evolution by natural selection would n... | askscience | http://www.reddit.com/r/askscience/comments/qn6mj/at_what_point_in_evolution_on_earth_did_cells_or/ | {
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"text": [
"Err, cells can't actually think. They don't 'want' anything or have a 'drive' for anything. They don't 'decide' to evolve. Evolution isn't something an individual does, it's something that happens over... | [] | [] | [
[],
[],
[]
] | |
3e4rzi | why do conservative supporters always say "the problem with socialism is you eventually run put of other people's money." when socialism is brought up | Especially when evidence shows that socialism works in various European countries
Run out* | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3e4rzi/eli5_why_do_conservative_supporters_always_say/ | {
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"text": [
"Exactly which European countries does socialism work in? It's a matter of degree. No EU country is as socialist as Marx would have des... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
510xup | how to mathematicians make a living? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/510xup/eli5_how_to_mathematicians_make_a_living/ | {
"a_id": [
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"text": [
"Most mathematics research is done by professors or graduate students at universities.\n\nProfessors get paid a salary in exchange for doing teaching and research. Solving famous mathematics problems gives their university p... | [] | [] | [
[],
[]
] | ||
29xla9 | what determines if someone is "hot-blooded" who loves the cold or "cold-blooded"who loves the heat? | If there is such a thing (which I believe there is), what determines this? My whole family is "hot - blooded"where we love the cold and despise the heat. While some of my friends are the exact opposite. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29xla9/eli5_what_determines_if_someone_is_hotblooded_who/ | {
"a_id": [
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"text": [
"It has to do with our ability to adapt. I currently live in Oklahoma and every year we go through the summers with unbearable heat and then winter rolls around and it's ridiculously cold. But by the time the seasons begin to change from one extre... | [] | [] | [
[]
] | |
3gwriz | the missile knows where it is because it knows where it isn't. | [For reference](_URL_0_). I saw this again today for the first time in several years, and if I understand correctly, it's not a gag. So: ELI5? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3gwriz/eli5_the_missile_knows_where_it_is_because_it/ | {
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"text": [
"The principle of inertial navigation is to track relative motion and accumulate (or integrate) towards a goal value (the target). The video is the sort of explanation we try to av... | [] | [
"https://www.youtube.com/watch?v=bZe5J8SVCYQ"
] | [
[],
[],
[],
[]
] | |
6qyhcn | how exactly does a us president "push legislation through congress?" | I always hear people say things like "Johnson was able to push the Medicare program through Congress," but what exactly does that mean? Is it just a matter of the President verbally pressuring representatives, or are there certain concessions that are made? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6qyhcn/eli5_how_exactly_does_a_us_president_push/ | {
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"text": [
"Both. They can tell members of Congress that future favors are coming if they agree, and that if they don't agree the President will not support their own pet ideas.",
"The president has a lot of so... | [] | [] | [
[],
[],
[]
] | |
p6cc0 | When you wake up late and don't remember turning off your alarms, what actually occurred? | Regardless of the number of alarms I put up, many times I wake up late and find that all my alarms have been turned off, though I have no memory of it.
Which situation is actually happening. Did I wake up, consciously turn them off, go to bed, then forget about it? Or was the whole process unconscious as part of the ... | askscience | http://www.reddit.com/r/askscience/comments/p6cc0/when_you_wake_up_late_and_dont_remember_turning/ | {
"a_id": [
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"text": [
"Something horrible happened here. I'll just leave this link directing you to a [past post](_URL_0_) that may be helpful."
]
} | [] | [] | [
[
"http://www.reddit.com/r/askscience/comments/lr8vs/why_cant_you_remember_the_exact_point_before_you/"
]
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5kruau | Are there any books that specifically deal with how medieval cavalry was used? | By this I mean, are there any books that look at the role of cavalry in warfare and how they were used in scouting, how charges were made and what their tactical role was? I know that there are a few books out there which deal with horses, their equipment and their social role/value, but I don't know of any that detail... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5kruau/are_there_any_books_that_specifically_deal_with/ | {
"a_id": [
"dbqnoqv"
],
"score": [
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"text": [
"For Norman and Anglo-Norman cavalry warfare, I would look at R. Allen Brown's \"The Status of the Norman Knight\" and \"The Battle of Hastings\", both located within Strickland's *Anglo-Norman Warfare: Studies in Late Anglo-Saxon and Anglo-Norman... | [] | [] | [
[]
] | |
4djk6g | What is happening in a light bulb on a quantum scale? Is it really just turning electrons into photons following The Conservation of Energy? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/4djk6g/what_is_happening_in_a_light_bulb_on_a_quantum/ | {
"a_id": [
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"score": [
2,
2
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"text": [
"Electrons are not turning into photons. What's happening is that a current of electrons is running through a wire similarly to water running through a pipe. However, this heats up the wire, since the wire has some resistance... | [] | [] | [
[],
[]
] | |
117ukm | How long can we expect the Mars Rover (and other manmade objects) to remain on Mars? | Would they still remain mostly intact after millions of years barring any meteor strikes? There is only a trace amount of oxygen, so I wouldn't think corrosion would be much of an issue. | askscience | http://www.reddit.com/r/askscience/comments/117ukm/how_long_can_we_expect_the_mars_rover_and_other/ | {
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"text": [
"They'll be there at least for tens of thousands of years, we have evidence of early metal tools from here on Earth that have survived that long relatively in tact with, as you pointed out, more corrosive conditions. It's har... | [] | [] | [
[],
[]
] | |
a4qath | Does the geometry of an atomic nucleus affect its stability? | I recently learned that some highly-stable elemental isotopes, such as Calcium-48, have highly-spherical nuclei. The source I heard this from seemed to imply that these characteristics are related, so I'm wondering if that is truly the case, and if so, why is that so? From my rudimentary understanding of nuclear physic... | askscience | https://www.reddit.com/r/askscience/comments/a4qath/does_the_geometry_of_an_atomic_nucleus_affect_its/ | {
"a_id": [
"ebgr5ls"
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"text": [
"Yes, the shape of a nucleus does generally affect its stability. From the liquid-drop model, you can see that there are volume and surface terms that both contribute to the binding energy.\n\nIn an extreme case of something very deformed and wit... | [] | [] | [
[]
] | |
68anu4 | why can't we fly a plane as high as it can go and launch a rocket off the back of it, using less fuel and weight, plus using the momentum it already has with the plane? kinda like a giant missile to space. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/68anu4/eli5_why_cant_we_fly_a_plane_as_high_as_it_can_go/ | {
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"You would still need s... | [] | [] | [
[],
[
"https://www.youtube.com/watch?v=GMyC2urCl_4"
],
[],
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"https://www.youtube.com/watch?v=Bla3RsVia9A",
"http://www.orbitalatk.com/news-room/feature-stories/Pegasus-25th/default.aspx"
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[
"https://en.m.wikipedia.org/wiki/SpaceShipOne?wprov=sfla1"
],
[],
[],
[],
[],
[],
... | ||
63kv0c | why have 'google' and 'photoshop' become verbs, but 'amazon' or 'wikipedia' haven't? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/63kv0c/eli5_why_have_google_and_photoshop_become_verbs/ | {
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27,
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"text": [
"Not sure the reasoning, but I've definitely heard/used \"wiki\" as a verb. \"I'm gonna wiki that to see if it's true\"",
"Necessity of a symbol. Language folows the need to express ideas efficient... | [] | [] | [
[],
[],
[]
] | ||
b7fxlc | why do criticality accidents never result in a nuclear explosion? | Accidents like the Tokimura nuclear accident make sense because the fissile materials are in an aqueous solution, and the solution boils off when too much heat is introduced, creating void space and preventing it from remaining at supercriticality.
But the demon core was a plutonium core meant to be in an atomic bomb?... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b7fxlc/eli5_why_do_criticality_accidents_never_result_in/ | {
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"text": [
"Nuclear reactors keep the fuel too spread out, with too much neutron-absorbing material in between, to become an atomic bomb.",
"The criticality accidents with the Demon Core ... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Fat_Man"
],
[],
[]
] | |
p7pz9 | What are some common causes of static electricity outside of the widely known factors (i.e., wool sweaters, etc) | askscience | http://www.reddit.com/r/askscience/comments/p7pz9/what_are_some_common_causes_of_static_electricity/ | {
"a_id": [
"c3n6jk6",
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"score": [
2,
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"text": [
"What are the widely known factors? This [link](_URL_0_) describes the action by which static charge builds up on people. I wasn't aware how it worked when I was told about it in a lecture a few years ago.",
"static elect... | [] | [] | [
[
"http://www.static-sol.com/articles/static_build_up_on_people.htm"
],
[]
] | ||
1x0ilz | When a Phase Change Occurs Because of Pressure Change (e.g. flashing of water), Does The Temp. Remain the Same? | I was reading about the effects on the human body when exposed to near vacuum conditions (such as in space). When NASA testing this, their test subject reported the last thing he remembered before he began to lose consciousness was the water on his tongue beginning to boil.
I assume this is because of the pressure of... | askscience | http://www.reddit.com/r/askscience/comments/1x0ilz/when_a_phase_change_occurs_because_of_pressure/ | {
"a_id": [
"cf7frtd"
],
"score": [
2
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"text": [
"You are correct, the water on his tongue boiled because the pressure was so low. The [phase diagram](_URL_0_) of water shows the thermodynamically preferred state of water for a given combination of pressure and temperature. Assuming the test s... | [] | [] | [
[
"http://en.wikipedia.org/wiki/File:Phase_diagram_of_water.svg",
"http://www.youtube.com/watch?v=9FudzqfpLLs"
]
] | |
1w3xmp | Why is Los Angeles so far from the coast? | LA is near the coast but why isn't downtown built directly on a port or navigable river like most big coastal cities? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1w3xmp/why_is_los_angeles_so_far_from_the_coast/ | {
"a_id": [
"ceyhbov"
],
"score": [
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"text": [
"There are no navigable rivers in southern California, so that was not an option. The area of downtown was inhabited by the Tongva people when Europeans arrived in the early 16th century. About 90% of the Tongva diet came from the acorns of the Ca... | [] | [] | [
[]
] | |
28d9mi | If a large astroid is on path to hit earth, would we be able to do anything about it? | askscience | http://www.reddit.com/r/askscience/comments/28d9mi/if_a_large_astroid_is_on_path_to_hit_earth_would/ | {
"a_id": [
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"text": [
"The answer to this depends on a great number of factors, such as how much advanced notice do we have, what is the mass and velocity of the asteroid, what wha... | [] | [] | [
[
"http://www.nasa.gov/mission_pages/asteroids/initiative/#.U6BNVvlSY5Q"
],
[],
[],
[
"http://longnow.org/seminars/02013/jun/18/anthropocene-astronomy-thwarting-dangerous-asteroids-begins-finding-them/",
"https://b612foundation.org/"
],
[]
] | ||
4thoih | what sense is most 'awake' when asleep? | I find that light wakes me up the most, but some people say they wake up to sounds/touch much faster. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4thoih/eli5_what_sense_is_most_awake_when_asleep/ | {
"a_id": [
"d5hgu4f"
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"score": [
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"text": [
"with sound, I think it depends on if you have background noise on. Like I used to sleep with a radio on growing up, wasn't very loud but because of that, I wouldn't really wake up to other outside noises. Now I sleep with nothing on and I feel li... | [] | [] | [
[]
] | |
3m4feh | how the time scale of minutes, hours, 12 hour half days, and 24 hours in a day were chosen. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3m4feh/eli5how_the_time_scale_of_minutes_hours_12_hour/ | {
"a_id": [
"cvbw7hy",
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"text": [
"Our system of time is based on 12. 12 can be divided by 2,3,4,6, and 60 can be divided by 2,3,4,5,6,10,12, ect. For normal every day use its extremely useful to be able to break time into those segments, and there are lots... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Sexagesimal"
]
] | ||
a0qk81 | What is the black-body radiation of a negative-temperature body? | That is to say, an emitting medium in a population inversion? Are higher frequencies more common than low? | askscience | https://www.reddit.com/r/askscience/comments/a0qk81/what_is_the_blackbody_radiation_of_a/ | {
"a_id": [
"eajqv66"
],
"score": [
10
],
"text": [
"Population inversion can't exist at thermal equilibrium, so you can't really expect the system to radiate according to the Planck distribution, which describes the radiation emitted by a system at thermal equilibrium.\n\nPopulation inversion is ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Population_inversion"
]
] | |
327k7f | what's the difference between simulator and emulator? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/327k7f/eli5_whats_the_difference_between_simulator_and/ | {
"a_id": [
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"text": [
"A simulation is a system that behaves similar to something else, but is implemented in an entirely different way. It provides the basic behavior of a system but may not necessarily abide by all of the ... | [] | [] | [
[
"http://programmers.stackexchange.com/questions/134746/whats-the-difference-between-simulation-and-emulation"
],
[],
[]
] | ||
3od6q5 | If you are in space and objects accelerate past you, will you feel force? | askscience | https://www.reddit.com/r/askscience/comments/3od6q5/if_you_are_in_space_and_objects_accelerate_past/ | {
"a_id": [
"cvxwpd4"
],
"score": [
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"text": [
"Ok, so I'm not any sort of scienceologist, but I'm pretty confident that the answer is \"no\". There is no shared medium in space that would transfer any compression wave to you. The only way you would experience a force would be if you ended up ... | [] | [] | [
[]
] | ||
3xhedc | why do people say an atheist can't be a republican? | I'm a republican on most political issues, I lean to the right on almost everything. Except that I lean to the left on things like gay rights, religion, and social issues. When I tell people that I am an atheist and identify as a republican they tell me that I can't be both. Am I just using the wrong terminology? Shoul... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3xhedc/eli5_why_do_people_say_an_atheist_cant_be_a/ | {
"a_id": [
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"cy4nv7n",
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"score": [
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13,
3,
8,
2,
2
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"text": [
"I like to call that a 'sensible republican'... \n\nMy girlfriend is like that... fiscally conservative and socially liberal.",
"The... | [] | [] | [
[],
[],
[],
[
"https://reason.com/poll/2014/07/10/53-of-millennials-would-vote-for-a-socia"
],
[],
[]
] | |
1ynro9 | Has anyone here read Wendy Doniger's "The Hindus: An Alternative History" and can tell me why it's controversial enough to be censored? What do academic historians think of the book's contents (regardless of their thoughts on censorship)? | So I heard that this book was banned (or ceased publication due to pressure) in India.
I assume most historians would be for free speech and discourse, so I'm not asking about the ban itself. Is the history presented in the book legit? What exactly in the book pissed people off? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ynro9/has_anyone_here_read_wendy_donigers_the_hindus_an/ | {
"a_id": [
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"text": [
"Hindusim, as it's practiced today–as with much we think of \"traditional\" in India—was heavily influenced by British colonialism, both in terms of what the British thought it was and should be, and as a reaction of Indian intellectuals to what t... | [] | [] | [
[]
] | |
2m8tfl | What happens if an earth-like planet crashes into a star? Or at least fall out of orbit and start approaching it? | Inspired by this post: _URL_0_ | askscience | http://www.reddit.com/r/askscience/comments/2m8tfl/what_happens_if_an_earthlike_planet_crashes_into/ | {
"a_id": [
"cm2569j"
],
"score": [
8
],
"text": [
"An Earth-like planet crashing into its star is less like a crash than it is like a gnat flying into a campfire. The planet would vaporize as it falls into the deeper layers of star."
]
} | [] | [
"http://www.universetoday.com/113488/how-do-gravitational-slingshots-work/"
] | [
[]
] | |
yb635 | how do i choose a credit card? | Every advertisement I'm sent always make their information sound great, but I have no idea how to read the fine print, nor do I really know what they're bragging about.
How can I tell what's a good deal?
What do all the terms mean?
What are average numbers for those terms?
What benefits would I have from getting a ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/yb635/eli5_how_do_i_choose_a_credit_card/ | {
"a_id": [
"c5u1lae"
],
"score": [
4
],
"text": [
"It depends - the credit card issuers put different features on different cards so that they'll appeal to different people.\n\n - Some credit cards are low fee. Get one of these if you want to be frugal.\n\n - Some cards are low interest. Get one ... | [] | [] | [
[]
] | |
1ethv8 | if the majority of the world's human and plant population was wiped out suddenly, how would the survivors access the seed banks? | In particular, the Svalbard Global Seed Vault in Norway. It seems to be under a lot of physical protection that an average person would not be able to get through. How would the survivors get access to the important seeds in order to restore essential plant life? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ethv8/eli5_if_the_majority_of_the_worlds_human_and/ | {
"a_id": [
"ca3n11s"
],
"score": [
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"text": [
"You're assuming that the staff that tend to the seed bank are also wiped out suddenly, and the seed bank survive intact.\n\nI'd find it hard to imagine a scenario where that would be true.. I'd imagine that it's manned 24/7.. If the seed bank sur... | [] | [] | [
[]
] | |
1l3ply | If a multilingual person suffers from aphasia could they loose comprehension of one language while retaining the ability to understand another? | I was curious seeing how certain types of aphasia can be selective. | askscience | http://www.reddit.com/r/askscience/comments/1l3ply/if_a_multilingual_person_suffers_from_aphasia/ | {
"a_id": [
"cbvk8dd",
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"score": [
2,
2
],
"text": [
"what kind of aphasia?",
"Interestingly, this is very important for epilepsy surgery and brain mapping. Often when planning a resection for a neurosurgical procedure, [stimulation mapping](_URL_0_) will be used to identif... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Cortical_stimulation_mapping",
"http://www.sciencedirect.com/science/article/pii/S0093934X83710023"
]
] | |
4o1isu | why is our writing voice often so different from our way of speaking? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4o1isu/eli5why_is_our_writing_voice_often_so_different/ | {
"a_id": [
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"text": [
"Basically, it's much easier to go over your writing and make changes until you like the way it sounds than it is just think about your words and get them all out in one try.",
"Your observation is n... | [] | [] | [
[],
[],
[]
] | |
2sfk0e | how come my vitamin c tablets have 1250% of the recommended daily allowance of vitamin c? | Seems like overkill... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2sfk0e/eli5_how_come_my_vitamin_c_tablets_have_1250_of/ | {
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"score": [
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3,
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"text": [
"Some people require more vitamin C than others because the have a condition or was previously deprived of it. \n\... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | |
92ajgz | why a lot of email scams actually look like scams? i have noticed many of the junk mails i receive, utilize random capital letters, bold writing, excessive exclamation marks and poor grammar. what do they hope to achieve from this any why do they not put more effort into their scam advertising? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/92ajgz/eli5_why_a_lot_of_email_scams_actually_look_like/ | {
"a_id": [
"e349xa9",
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"score": [
44,
17
],
"text": [
"Scammers will commonly use poor grammar, awkward phrasing and spelling on purpose as a sort of filter. Anyone responding to those emails must not be aware of the scam and or must not be smart enough to realize it is before... | [] | [] | [
[],
[]
] | ||
23h0td | Movies and Television series often portray certain swordsmen as "heroes" or "experts." People whose skill in battle far exceeded all of their opponents. Were there actually such swordsmen or warriors in the middle ages who had such unmatched skill or prowess? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/23h0td/movies_and_television_series_often_portray/ | {
"a_id": [
"cgwyhz8",
"cgx292t"
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"score": [
3,
6
],
"text": [
"The only one who comes to mind right now is *Miyamoto Musashi*, a Japanese swordsman who lived in the late 1500s and the first half of the 1600s. He was a soldier at the Battle of Sekigahara among others, but he also fought ... | [] | [] | [
[],
[]
] | ||
3ptke2 | How do U.S. servicemen who married Asian women between 1942-1967 get around anti-miscegenation laws when they returned to the states with their brides? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3ptke2/how_do_us_servicemen_who_married_asian_women/ | {
"a_id": [
"cw9cgbp"
],
"score": [
3
],
"text": [
"The law on the books for Virginia for instance, did not speak at all too the Asian population, but ONLY to marriage between black and white. \n\nThat was actually appoint during the Supreme Court's hearing of Loving v. Virginia, where because the... | [] | [] | [
[]
] | |
k5yyh | Is it possible to make an entirely frictionless surface? | And if that's impossible what's the closest we can get? | askscience | http://www.reddit.com/r/askscience/comments/k5yyh/is_it_possible_to_make_an_entirely_frictionless/ | {
"a_id": [
"c2hs48d",
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"score": [
4,
4
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"text": [
"As far as I know, it is impossible to create a truly frictionless surface, but we can come very close. See: [Superlubricity](_URL_0_)",
"As far as I know, it is impossible to create a truly frictionless surface, but we c... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Superlubricity"
],
[
"http://en.wikipedia.org/wiki/Superlubricity"
]
] | |
7mnbp1 | Are modern day cinematic representation of WWII infantry helmets accurate in terms of durability? | For example, in movies and shows like saving private Ryan and band of brothers, sodlers are quite often shown taking a bullet to the helmet and the bullet going through with little to no trouble. It almost seems like helmets were basically pointless when it came to a direct hit. Was that accurate from back then? Whethe... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7mnbp1/are_modern_day_cinematic_representation_of_wwii/ | {
"a_id": [
"drv87ca"
],
"score": [
4
],
"text": [
"There are enough leftover WWII helmets still around (as the design and materials didn't significantly change for decades) that the ones in the films are quite likely vintage. They were designed to deflect shrapnel and debris, and deflect rounds t... | [] | [] | [
[]
] | |
4q3794 | What effects does a pear-shaped nucleus actually have on an atom? And what causes it? | I just saw [this post](_URL_0_) in /r/science which talks about a pear-shaped nucleus. There was an article linked, but it was a bit above my understanding.
So given that I was always told that an atom's nucleus is spherical, what do different shapes mean? | askscience | https://www.reddit.com/r/askscience/comments/4q3794/what_effects_does_a_pearshaped_nucleus_actually/ | {
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"d4pthyi",
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"score": [
6,
457,
22
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"text": [
"Just going to add that the paper can be found on arxiv: [Direct Evidence of Octupole Deformation in Neutron-Rich ^(144)Ba](_URL_0_)",
"I'll try and make this as simple as possible.\n\nNuclear str... | [] | [
"https://www.reddit.com/r/science/comments/4q2j6z/experiments_confirm_that_the_barium144_nucleus_is/"
] | [
[
"http://arxiv.org/pdf/1602.01485v1.pdf"
],
[],
[]
] | |
1z3ofw | why can i roll my eyes toward the top of my head but not the bottom? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1z3ofw/eli5_why_can_i_roll_my_eyes_toward_the_top_of_my/ | {
"a_id": [
"cfq7var",
"cfq8x12"
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"score": [
2,
16
],
"text": [
"I can't understand the question fully, care to elaborate OP?",
"Your optical nerve attaches to the back of your eyeball at an upward angle just below your eyes midpoint. As you look down, it causes more tension as it tr... | [] | [] | [
[],
[]
] | ||
9zng8p | how is it physically possible, across all species, for hummingbirds to flap their wings anywhere from 10-30 or in the extreme up to 70-80 times "per second", or is that unit misinterpreted? | I can't seem to find a specific answer for this in regards to *how*. It just seems so odd. My lack of understanding is taking this unit as basically saying time is slowed down for Hummingbirds. I cannot wrap my head around how this makes any sense. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9zng8p/eli5_how_is_it_physically_possible_across_all/ | {
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"eaaktou",
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"score": [
28,
18,
11,
2
],
"text": [
"Hummingbirds have tiny little wings and relatively strong muscles to move those tiny little wings.",
"The balance between weight and power. Dragonflies and other insects als... | [] | [] | [
[],
[
"https://www.adirondackcouncil.org/page/blog-139/news/10-facts-about-hummingbirds--and-other-interesting-tidbits-1101.html"
],
[],
[]
] | |
348z9v | "Hitler lost the war the moment it began"; Is there any truth to this? | I remember hearing this somewhere when i was in high school, but can only recall them saying it was because of the training of massive numbers of paratroopers somewhere (im assuming Soviet), and how they had many more weapons being made every day. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/348z9v/hitler_lost_the_war_the_moment_it_began_is_there/ | {
"a_id": [
"cqsg5bh",
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11,
33,
23
],
"text": [
"This is most likely a reference to the economic realities of Nazi Germany and their inability to fight a long, sustained war against the Allies. There are several older threads discussing the economi... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1eck8t/what_was_nazi_germanys_economy_like_before_ww2/",
"http://www.reddit.com/r/AskHistorians/comments/1b66lm/wherehow_did_nazi_germany_get_access_to_enough/",
"http://www.reddit.com/r/AskHistorians/comments/1t2n6m/how_did_germany_fund_their_rise_out_o... | |
6o2f0h | why/how did venezuela develop a coin shortage a few years ago? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6o2f0h/eli5_whyhow_did_venezuela_develop_a_coin_shortage/ | {
"a_id": [
"dke9fea"
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"score": [
2
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"text": [
"At one point the value of the metal in the coins was worth more than the coins themselves due to inflation. When this happened any coins people had were melted down and paper money had to be used."
]
} | [] | [] | [
[]
] | ||
3f7gni | Is there a limit to how fast a substance can go through a pipe/tube? | The pipe or tube is indestructible and does not get wider with an increase in pressure. I'm not sure if the substance matters, but if it does lets say either water or oxygen is being forced through.
Is there a theoretical limit at which you cant force a substance to travel faster through a fixed pipe? | askscience | http://www.reddit.com/r/askscience/comments/3f7gni/is_there_a_limit_to_how_fast_a_substance_can_go/ | {
"a_id": [
"ctn9x93"
],
"score": [
2
],
"text": [
"Is the pipe frictionless,and does the fluid/gas have viscosity?\n\nMost real pipes have a boundary layer close to the edges.\n\nOther than those two issues,the limits would be how hard you can push (it's going to require more force the faster you... | [] | [] | [
[]
] | |
65q3qi | how close can we get a bomb to be as strong as a nuclear bomb without having it being nuclear? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/65q3qi/eli5_how_close_can_we_get_a_bomb_to_be_as_strong/ | {
"a_id": [
"dgca6n3"
],
"score": [
2
],
"text": [
"There's an upper limit on the energy density of explosives, particularly on a mass basis. An airplane has to be able to lift, carry, and drop the thing.\n\nFor comparison, the Little Boy bomb that the US dropped on Hiroshima in WW2 was well over ... | [] | [] | [
[]
] | ||
6p47v1 | Did Tolkien use a lot of his experiences in WW1 to inspire certain parts of Lord of the Rings? | After learning a lot about WW1 and watching Lord of the Rings I can't help but feel he based a lot of parts in his book on his experiences in the war. ie. The idea of adventure and the unknown of Sam and Frodo heading out of The Shire, Saroman's age of industry trying to conquer all, a war to end all wars and shower th... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6p47v1/did_tolkien_use_a_lot_of_his_experiences_in_ww1/ | {
"a_id": [
"dkn0ucg"
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"score": [
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"text": [
"Tolkien was annoyed by analysts who claimed his work was an allegory of WW2, and responded that firstly he did not like historical allegory in fiction, and secondly that he began world-building long before WW2. He stated it was a lot more plausib... | [] | [] | [
[]
] | |
8iojov | why are there no underwater cities? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8iojov/eli5_why_are_there_no_underwater_cities/ | {
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"text": [
"Because it would be ridiculously expensive to build a city underwate... | [] | [] | [
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[]
] | ||
280umz | Did the Mali Kingdom Reach America before Columbus? | I remember in high school world history class reading a poem about Mansa Musa's father Abubakr II. the poem said that his father set sail West with a very big fleet of ships and never returned to Mali. My world history teacher tried to imply that they could've reached the American continent because apparently there was... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/280umz/did_the_mali_kingdom_reach_america_before_columbus/ | {
"a_id": [
"ci6ewsa"
],
"score": [
38
],
"text": [
"Was it possible that someone from West Africa crossed the Atlantic before the late 15th century? Sure it was, just like it was theoretically possible that Chinese ships crossed the Pacific. It is however extremely unlikely, first of all becaus... | [] | [] | [
[]
] | |
3mf48h | why are perpetual magnetic generators not a viable source of power? | Example video of what I am talking about: _URL_0_
| explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mf48h/eli5_why_are_perpetual_magnetic_generators_not_a/ | {
"a_id": [
"cveh5na",
"cveitws",
"cvelv36",
"cvelw22",
"cvelzu5",
"cveme62"
],
"score": [
19,
8,
2,
4,
2,
11
],
"text": [
"short and sweet answer: because there is no such thing as a truly perpetual magnetic generator. It is a physically impossible thing. a... | [] | [
"https://www.youtube.com/watch?v=uTtq3ALAtDE"
] | [
[],
[],
[
"http://youtu.be/yMlp-8h4KZs"
],
[],
[],
[]
] | |
1eukqv | How long did it take for feral horses to become ubiquitous in the great plains? Did they begin to populate right after the columbian exchange or did it take the centuries to reach 19th century levels? | I would like to expand the question: What Indian tribes best utilized horses? what societies dominated? how did the reintroduction of the horse alter the lives of plains people? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1eukqv/how_long_did_it_take_for_feral_horses_to_become/ | {
"a_id": [
"ca415gx"
],
"score": [
46
],
"text": [
"I'm sure somebody will be able to come along and expand. But I'll pull some information from the Native American history class I took. \n \nFor several centuries, the Spanish tried really hard to keep horses out of the hands of Native American... | [] | [] | [
[]
] | |
2pa62s | Do black-holes retain the properties of the matter they absorb? | For example, if a black hole was comprised mostly of material that was highly magnetic...would the black hole be magnetic?
If so, could such forces be used to contain/move smaller ones? | askscience | http://www.reddit.com/r/askscience/comments/2pa62s/do_blackholes_retain_the_properties_of_the_matter/ | {
"a_id": [
"cmvhwvi"
],
"score": [
2
],
"text": [
"As far as I understand it, the current understanding is that of all the matter that falls into a black hole, only the quantities which are strictly conserved in all physical interactions, i.e. mass, electric charge, linear momentum and angular mo... | [] | [] | [
[]
] | |
3pvd8i | why is necrophilia so much more taboo than murder? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3pvd8i/eli5_why_is_necrophilia_so_much_more_taboo_than/ | {
"a_id": [
"cw9rvzf",
"cw9sspp"
],
"score": [
4,
4
],
"text": [
"Victorian dogma about fear and revilement of death/respect for the dead that has lingered on. If we lived in a purely rational society, it would probably be possible to donate your body to necrophilia, because you are correc... | [] | [] | [
[],
[]
] | ||
22y8l3 | can you think of anyone from before 1970 who predicted that something like the internet would exist? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/22y8l3/can_you_think_of_anyone_from_before_1970_who/ | {
"a_id": [
"cgrldov",
"cgrmskh",
"cgrmtdh"
],
"score": [
14,
5,
4
],
"text": [
"Vannevar Bush, who conceptualized information technology in the 1940s (as opposed to mere _computing_: computers then were just meant to perform calculations). Douglas Engelbart, who invented the graph... | [] | [] | [
[
"http://en.wikipedia.org/wiki/The_Mother_of_All_Demos",
"https://www.youtube.com/watch?v=yJDv-zdhzMY"
],
[],
[
"http://www.damninteresting.com/teslas-tower-of-power/",
"http://www.huffingtonpost.com/w-bernard-carlson/did-al-gore-invent-the-internet_b_3581391.html",
"http://en.wikipedia.o... |
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