q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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|---|---|---|---|---|---|---|---|---|---|
56anyo | protons and neutrons | Why does losing neutrons make an atom unstable when the overall charge stays the same?
Thanks in advance for the answers :) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/56anyo/eli5_protons_and_neutrons/ | {
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"Neutrons act as a buffer/glue between the positive charges in the nucleus. When you group two or more protons in a tight space (like the nucleus) they will repel each other due to the fact that they are both positive. This repulsion, along with t... | [] | [] | [
[]
] | |
5y7dtu | will we be able to visualize 4d objects using augmented reality? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5y7dtu/eli5_will_we_be_able_to_visualize_4d_objects/ | {
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"score": [
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"text": [
"Not in a better way than we already can.\n\n3D visualizations on 2D screen are just a projection, they do not \"fully\" visualize the 3D object, but since we are used to living in 3D world, our brain can reconstruct the 3D structure from the 2D p... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Hypercube"
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g06roo | why does pain get worse at night? | As the title says, why does physical pain get worse at night? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/g06roo/eli5_why_does_pain_get_worse_at_night/ | {
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"Because you notice it more. You are no longer distracted by your daily activity, and are trying to reduce sensation so you can get some sleep. The pain makes this harder so you n... | [] | [] | [
[],
[],
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2w89pg | How would the rest of Lincoln's presidency played out had he not been assassinated? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2w89pg/how_would_the_rest_of_lincolns_presidency_played/ | {
"a_id": [
"coofx4a"
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"score": [
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"text": [
"We simply do not know. Alternative history is left to imaginative authors, not historians. :) /r/HistoryWhatIf is a good place for that."
]
} | [] | [] | [
[]
] | ||
3fbkwj | reddit told me ebola was so severe it would wipe out most of africa. where did the ebola go? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3fbkwj/eli5_reddit_told_me_ebola_was_so_severe_it_would/ | {
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"text": [
"Reddit says a lot of shit, maybe you shouldn't believe all of it and do your own research. ",
"Effective procedures damped the current outbreak. Just yesterday a [paper was published in the Lancet](_URL_0_ ) showing a 1... | [] | [] | [
[],
[
"http://www.thelancet.com/pb/assets/raw/Lancet/pdfs/S0140673615611175.pdf"
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12noaf | Question about lights being turned on at light speed. | I was talking to my roommate and she mentioned that if one were travelling in a vehicle at the speed of light that turning on a light (lets say head lights) would cause the flights to shoot forward into spcae because light is the fastest "thing" in the universe.
I was under the impression that, since C is a constant... | askscience | http://www.reddit.com/r/askscience/comments/12noaf/question_about_lights_being_turned_on_at_light/ | {
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"It is moot to discuss this since nothing massive can ever travel at the speed of light.\n\nTo propose a hypothetical situation where mass could travel at the speed of light means creating a universe with fundamentally different laws of physics, ... | [] | [] | [
[]
] | |
261byu | multivitamins, how can they fit hundreds of compounds stably into one pill | Without having them degrade one another | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/261byu/eli5_multivitamins_how_can_they_fit_hundreds_of/ | {
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"text": [
"thousands of pounds of pressure and stabilizing agents? That's pretty much the only ingriedents in most multivitamins. In vitamins, cellulose serves the important role of helping to combine vitamins -- some of which would otherwise be liquids -... | [] | [] | [
[
"http://www.livestrong.com/article/464910-uses-side-effects-of-cellulose-in-vitamins/"
]
] | |
2xcya9 | how does classification of national secrets work? is there one person "who knows everything"? | In light of all the revelations about America's vast intelligence industry/community...the "deep state" and so on...I would really like to know all that's publicly knowable about how keeping secrets actually works.
For example, if a document or program is classified "top secret" -- does anyone with a top secret clear... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xcya9/eli5_how_does_classification_of_national_secrets/ | {
"a_id": [
"coyzdwu"
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"score": [
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"text": [
"No. Information is \"need to know\". If you dont have the need, you dont have access to it. "
]
} | [] | [] | [
[]
] | |
1huhd6 | How do astronomers identify different wavelengths of light from such far objects? Don't they dissipate too much long before reaching us? | askscience | http://www.reddit.com/r/askscience/comments/1huhd6/how_do_astronomers_identify_different_wavelengths/ | {
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"text": [
"the light dissipates in the sense that you get less of them per area because it is so spread out, but the actual frequencies do not change. so, its the exact same thing as taking a picture or using a diffraction grate on som... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Spectrometer"
]
] | ||
1jni57 | Why are the Central Powers popularly regarded as the "bad guys" of World War I? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1jni57/why_are_the_central_powers_popularly_regarded_as/ | {
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"text": [
"Because they (chiefly Austro-Hungary and Germany) were perceived as the aggressors. [The Austro-Hungarian Empire invaded Serbia](_URL_1_) and the Germans invaded Luxembourg and Belgium, allowing the Allies to claim 'they sta... | [] | [] | [
[
"https://en.wikisource.org/wiki/Treaty_of_Versailles/Preamble",
"https://en.wikipedia.org/wiki/Serbian_Campaign_(World_War_I)"
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"http://www.reddit.com/r/defaultgems/comments/1ilx35/usatrell_gets_gold_for_a_historically_inaccurate/cb5rogo",
"http://www.reddit.com/r/politics/comments/elx71/b... | ||
dc30e9 | how do logic gates calculate their output? | Do transistors calculate the output? If so, wouldn't transistors be the most fundamental logic of computers?
Thanks. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dc30e9/eli5_how_do_logic_gates_calculate_their_output/ | {
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2yi5l2 | If the heat death occurs, how can time itself stop? | Since space and time is the same thing, how can time stop if the heat death occurs? The low energy particles evenly distributed in the universe would still be distributed in space, with space between them. Right? | askscience | http://www.reddit.com/r/askscience/comments/2yi5l2/if_the_heat_death_occurs_how_can_time_itself_stop/ | {
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"text": [
"Love this question!\n\nThis is where metaphysics and philosophy blend. Also, a classic question becomes metaphysically/philosophically beautiful!\n\nIf a tree falls in the forest, does it make a sound?\n\nMost people answer... | [] | [] | [
[],
[]
] | |
45shto | how does hd/4k work and why does your tv need to have special capability to support it? | I was told HD/4K is basically just having smaller pixels, and more of them, to produce sharper images. Is this true? If not, how does it actually work? Also, if it is true, why does your TV need to support the definition - can't it just automatically make pixels smaller without needing special technology.
Nerds/remote... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/45shto/eli5_how_does_hd4k_work_and_why_does_your_tv_need/ | {
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"Yes, it's basically just having smaller pixels and more of them. Your TV can't just make the pixels smaller because they're a physical f... | [] | [] | [
[],
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[],
[],
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"http://c8.alamy.com/comp/BN9NWT/monitor-screen-pixels-closeup-BN9NWT.jpg"
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3zfxar | cheap low voltage plasma balls. | In the late 80's I so very badly wanted a plasma ball - but they cost the same as an Amiga 500 and from what I understand used almost the same amount of energy.
This Christmas I bought a little one as a gift - it cost me £3.50 and is powered via a USB port. What's changed - how is this possible? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3zfxar/eli5_cheap_low_voltage_plasma_balls/ | {
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"There really was no good reason in the 80's for a \"plasma ball\" to cost as much as it did...at least from an electrical components point of view. It's essentially a Tesla Coil and a lightbulb...but the bulb filled with a more interesting gas t... | [] | [] | [
[
"http://www.personal.psu.edu/sdb229/plasma%20schematic.gif"
]
] | |
7d7px9 | how do crt displays have the ability to display video below the maximum resolution without the use of interpolation? | I hear that the old CRT displays can operate at different resolutions without the use of any upscaling methods. The flat panel displays can only operate at the maximum resolution format. That means digital video upscaling is required to match the maximum resolution of the display. It is hard to find a good explanation ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7d7px9/eli5_how_do_crt_displays_have_the_ability_to/ | {
"a_id": [
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"text": [
"Digital displays have a fixed number of pixels, which is what is called the \"native\" resolution of the display. Because of this fixed number, any resolution that tries to display less pixels than what are physically present requires interpolati... | [] | [] | [
[]
] | |
8ogxs0 | What are some ways greek and roman mythology varied regionally and over time? | Greek mythology wasn't the full pantheon from the get go, right? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8ogxs0/what_are_some_ways_greek_and_roman_mythology/ | {
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"text": [
"I can certainly answer how it changed over time. Namely, very intriguing details from the 2nd century onwards have shown evidence of growing Monotheism in the Roman world via Jupiter/Zeus or Heracles, bereft of very little if any intervention fro... | [] | [] | [
[]
] | |
1ekrdg | why monsanto is lobbying so hard against having gmos labeled on food. | This may be a naive question with the simple answer that because the public associates GMOs with danger it will loose business, but in [this article](_URL_0_) it says GMA estimates "70% of non-organic grocery store processed foods contain GMOs." If they are that prevalent, please explain why this is such a big deal. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ekrdg/eli5_why_monsanto_is_lobbying_so_hard_against/ | {
"a_id": [
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22,
4,
12
],
"text": [
"Because labeling invites demonization. If you put \"no pesticides\" on one box and not on another, people buy the \"no pesticides\" one despite the fact that neither one has pesticides and no food wit... | [] | [
"http://www.commondreams.org/view/2013/05/17-4"
] | [
[],
[],
[
"http://xkcd.com/641/"
]
] | |
638azf | why is it when you cook food at 20% higher heat it cooks the food disproportionately faster? | If I am cooking this particular brand of chips at 180C it will take 40+ minutes, however if I cook at 220C it will cook in 20 minutes. Worth noting that is how long it takes for them both to be cooked all the way through to a good standard. So a 20% increase in heat decreases cooking time by > 50%. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/638azf/eli5_why_is_it_when_you_cook_food_at_20_higher/ | {
"a_id": [
"dfsp3iz"
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"text": [
"Well... what is heat? Is an increase from 180C to 220C a 20% increase in the amount of heat an object gets? If I start at 20C and I increase the temperature to 60C, am I getting a 300% increase in heat? Both are increases in temperature by 40C. W... | [] | [] | [
[]
] | |
ny6nd | why some actors get famous for one role and then are never in anything else, while other extremely famous actors keep getting large roles. | Thanks :) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ny6nd/eli5_why_some_actors_get_famous_for_one_role_and/ | {
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"- Their agent hasn't sold them enough to other producers for films\n- They're not that talented, or only skilled ... | [] | [] | [
[],
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"http://imgur.com/U0wUM"
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60crpf | How were POW treated and sent back to their country of origin after hostilities ended in the late middle ages/renaissance? | I've always wondered how such a seemingly logistical nightmare would be accomplished in these times.
The reason I ask for the late middle ages/renaissance has to do with me wanting to create a mod simulating POW returns in a video game I play.
Thanks in advance. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/60crpf/how_were_pow_treated_and_sent_back_to_their/ | {
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"Well, the main thing is that they generally didn't. \n\nThe only prisoners taken were typically of high birth, nobles and aristocrats. If you were a dirty mercenary with a spear you were likely to be slaughtered or just sent on your way if the ... | [] | [] | [
[]
] | |
3jj7ea | Why do seemingly all modern military organizations use the Western model? | I was looking up alternate ways to organize military units for a world building exercise, but I started to notice that every military I looked up had the same organization type as the "standard" European model, with some slight differences in nomenclature or the exact composition of each level.
Why is this one militar... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3jj7ea/why_do_seemingly_all_modern_military/ | {
"a_id": [
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2
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"text": [
"Would you be willing no elaborate on what you mean by \"standard European model\"? In the past century or so, there have been quite a few significant changes in how states and governments around the world, organized and equ... | [] | [] | [
[],
[]
] | |
11iwot | Could we use a balloon similar to the stratos/redbull one to ferry people/cargo into orbit? | Could we lift things high enough that only a small rocket boost would take them into a geostationary orbit? | askscience | http://www.reddit.com/r/askscience/comments/11iwot/could_we_use_a_balloon_similar_to_the/ | {
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"text": [
"No. Most of a rocket's energy is spent getting it into orbital velocity, not getting it up. Geostationary orbit requires a speed of 11,160 km/h. You wouldn't save much energy raising the rocket with a balloon, and the rocket... | [] | [] | [
[],
[]
] | |
2uh8y9 | Why doesn't your metabolism speed up when eating a lot of calories? | I know that when you're fasting, your metabolism consumes less calories to conserve energy, so if you're eating to many calories, why doesn't your body burn calories faster? | askscience | http://www.reddit.com/r/askscience/comments/2uh8y9/why_doesnt_your_metabolism_speed_up_when_eating_a/ | {
"a_id": [
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"text": [
"We do. Just not enough for some peoples' intake...\nPost-prandially (after a meal) we speed up our basal metabolic rate via 5-HT, insulin, secretin and a plethora of other hormones that respond to increases in blood sugar levels, satiety and even... | [] | [] | [
[]
] | |
3k8552 | Do we have the technology to alter our star's fusion reaction? | askscience | https://www.reddit.com/r/askscience/comments/3k8552/do_we_have_the_technology_to_alter_our_stars/ | {
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"text": [
"I'm not entirely sure what you mean by alter our star's fusion reaction, but the answer in any case is most likely to be a resounding no.\n\nWe barely have the technology to get close to the sun, and our own fusion technology is still in it's inf... | [] | [] | [
[]
] | ||
14b1h0 | If HIV virus dies within a certain amount of time after leaving the body, Can some modified form of dialysis be used to lower viral counts? | askscience | http://www.reddit.com/r/askscience/comments/14b1h0/if_hiv_virus_dies_within_a_certain_amount_of_time/ | {
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"text": [
"No, because HIV is in the bone marrow. There has, however, been some limited success in the form of a few individuals who have been cured by means of a bone marrow transplant. Which by the way is a super-dangerous procedure and at this point wo... | [] | [] | [
[
"http://www.npr.org/blogs/health/2012/07/26/157444649/two-more-nearing-aids-cure-after-bone-marrow-transplants-doctors-say"
]
] | ||
9mvdkn | why does hot water feel hotter when moving your submerged hand through it, rather than holding it still? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9mvdkn/eli5_why_does_hot_water_feel_hotter_when_moving/ | {
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"Because there are tiny hairs and imperfections on your skin that trap air. This helps insulate your hand ever so slightly. When you move your hand it helps dislodge that air and now the water is touch... | [] | [] | [
[],
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am8gni | Need Help Identifying Items Found With Great Grandfather's Purple Heart from WW2 | Hello,
My grandfather passed recently and as my mother was going through his things we found my great grandfather's Purple Heart from WW2. In the case we found a few other items that we cannot identify and I would love if someone could assist us in figuring these out.
[What we found](_URL_0_)
Obviously there are the ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/am8gni/need_help_identifying_items_found_with_great/ | {
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"To the left of the Purple Heart is an iron cross marksman badge. It’s upside down in the picture and would have had another piece attached to it that has the name of the weapon the badge was earned with. (Rifle, pistol, etc.)\n\nBottom left is h... | [] | [
"http://imgur.com/gallery/Bic20XV"
] | [
[]
] | |
2qj0zr | What was the British Reaction to the American Great White Fleet? | Did the British react to it at all? I understand that they built HMS Dreadnought the year before, but I'd have thought they'd have reacted to anything that threatened Naval superiority | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2qj0zr/what_was_the_british_reaction_to_the_american/ | {
"a_id": [
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"text": [
"Not to be too enthusiastic but the British loved the Great White Fleet. Americas entry into the world of Naval superiority was the best thing before sliced bread to the British who were stretched thin. Consolidating power against Germany at hom... | [] | [] | [
[
"http://www.navy.mil/gwf/auckland.htm"
]
] | |
mr4ys | advantages of arm vs x86 instruction set architectures | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mr4ys/eli5_advantages_of_arm_vs_x86_instruction_set/ | {
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"The x86 instruction set is large and may of its instructions are complicated to build into a chip. By comparison, the ARM instruction set has fewer, simpler instructions. Fewer i... | [] | [] | [
[],
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53aqfg | what is a blind and a double blind experiment in science? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/53aqfg/eli5_what_is_a_blind_and_a_double_blind/ | {
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2
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"text": [
"Blind: The participants in the study don't know whether or not they're receiving the treatment being tested.\n\nDouble-blind: Neither the participants nor the researchers know which participants received the treatment being... | [] | [] | [
[],
[]
] | ||
8mp995 | what creates different textures on the molecular level? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8mp995/eli5_what_creates_different_textures_on_the/ | {
"a_id": [
"dzpctkx"
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"score": [
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"text": [
"It is all about imperfections. Most every day objects, like clothes, are made from smaller parts, like cotton fibers, and the spaces between them give them a texture. Wool sweaters have a rough texture partly do to these \"macro-imperfactions\". ... | [] | [] | [
[]
] | ||
b2mo7u | how doesn't my cars remote work on other cars? like how isn't there another car with the same frequency if its even based on that? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b2mo7u/eli5_how_doesnt_my_cars_remote_work_on_other_cars/ | {
"a_id": [
"eitmbtv"
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"score": [
4
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"text": [
"they use the same frequency sure. but there are unique identifiers in the transmitter and receiver. only if the transmitter sends the correct code the receiver is expecting does it unlock. for cheap systems, these are hardcoded so anyone that ... | [] | [] | [
[]
] | ||
1lrmud | how can i suddenly remember bits of dreams from years ago? is my brain riffing on the spot and confusing it with recalling a vivid dream? | This happened to me today, as it will from time to time. The second part of the question is just pedantic Philip K. Dickish pondering on what constitutes a memory. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1lrmud/eli5how_can_i_suddenly_remember_bits_of_dreams/ | {
"a_id": [
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"score": [
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"text": [
"Goddamit this happens to me all the time, excellent question."
]
} | [] | [] | [
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2d2l89 | Historiography of the infamous Maya "collapse"? | Forgive me if this question isn't appropriate, I wasn't sure where else to ask.
Obviously countless books and articles have been written about the Terminal Maya "collapse" in the 8th and 9th centuries, but I was more curious if anyone knew of anything academic that looked at the historiography of the event. That is t... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2d2l89/historiography_of_the_infamous_maya_collapse/ | {
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"text": [
"I should be able to add more to this subject but at the moment all I got is a recommendation to check out Michael D. Coe's *Maya* if you haven't. It's a general introductory textbook on the Maya so it's not explicitly focus... | [] | [
"http://publishingarchaeology.blogspot.com/2009/05/maya-collapse-when-theoretical.html"
] | [
[],
[]
] | |
1132y8 | If Earth is moving, the Sun is moving, and our galaxy is moving.. are we not closer to the speed of light than we think? | So I did the research, and it's actually not as much as I thought when I came up with the idea. The speed of light is 299,792,458 m/s. If you want to travel that speed, you'd consider yourself to be starting at 0 m/s, but then you realise that the earth is moving at 30,000 m/s, the sun is moving at 220,000 m/s and the ... | askscience | http://www.reddit.com/r/askscience/comments/1132y8/if_earth_is_moving_the_sun_is_moving_and_our/ | {
"a_id": [
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"text": [
"Relative to what? There's no such thing as absolute speed. To high-energy cosmic particles we are moving very close to the speed of light indeed.",
"Relative to the CMB, we're moving about 600 km s^-1 or about .2% the s... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Cosmic_microwave_background_radiation#CMBR_dipole_anisotropy"
]
] | |
9jb6ay | why we have to grind our teeth when we are angry or when getting into a fight | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9jb6ay/eli5_why_we_have_to_grind_our_teeth_when_we_are/ | {
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"text": [
"I'm not an expert here but I don't think we \"have to\" grind teeth when angry or prepping for a fight. \n\nI've been in plenty of fights and been plenty mad at times and never \"ground\" my teeth. Clinched my teeth, sure. Y... | [] | [] | [
[],
[]
] | ||
3bo1bs | Why did the French ships stationed at Mers-el-Kebir in 1940 refuse to join up with the British ships in order the prevent them falling into Axis hands? | I am watching WWII in Color and I am wondering why the french ships refuse to join the British or sail to a neutral port? Wouldn't that be the smarter option? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3bo1bs/why_did_the_french_ships_stationed_at_merselkebir/ | {
"a_id": [
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"text": [
"Basically because there was very little chance that the ships would fall into Axis hands in the near term. After the French surrender the fleet was one of the few chips the French still held and they were not about to simply hand it to the German... | [] | [] | [
[]
] | |
181f2o | What remains intact on Venus of the USSR's Venera landers? What's the biggest challenge to build for: extreme heat, pressure or the atmospheric makeup? | What exactly remains on the Venusian surface? We know that the Soviet probes sent there functioned for no more than a couple hours, but what is left behind, if anything? What can be expected as remnants... just a bunch of molten liquid? Or what? | askscience | http://www.reddit.com/r/askscience/comments/181f2o/what_remains_intact_on_venus_of_the_ussrs_venera/ | {
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"As the surface temperature of Venus is around 480°C, and the melting point of titanium (of which the Soviet Venera 9 and Venera 10 landers were primarily composed) is 1668°C, the landers certainly are not in any sort of a \"molten\" state. Contr... | [] | [] | [
[
"http://www.mentallandscape.com/V_Lavochkin2.htm"
]
] | |
39hvm0 | if it's bad for a phones battery to overcharge, why is the charger not made to stop charging when the phone is fully loaded? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/39hvm0/eli5if_its_bad_for_a_phones_battery_to_overcharge/ | {
"a_id": [
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"It does stop.\n\nOnce it reaches 100% it will stop charging. If your battery slowly drains to a certain level (95-99%), it will top up back to 100% and then process repeats itself.",
"Generally, they are (well, not usual... | [] | [] | [
[],
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] | ||
60sns8 | how to humans perceive a three dimensional soundscape with just two ears? | I understand the time discrepancy between the arrival of a sound wave between the two ears helps, but how can you distinguish between something that is immediately above you as opposed to behind you as the sound should be the same in both ears? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/60sns8/eli5_how_to_humans_perceive_a_three_dimensional/ | {
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"It sounds more muffled than \"normal\" when heard from behind, since our ears are aimed more forward for picking up sounds. We aren't hearing a single lone unique sound out of nowhere (and if we are, we... | [] | [] | [
[],
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3xzvs0 | obama and no child left behind | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3xzvs0/eli5_obama_and_no_child_left_behind/ | {
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"text": [
"No Child Left Behind was a law passed in 2001, signed into law by George W. Bush. In broad strokes it required states to deliver standardized tests to all students in the state as a condition for receiving federal funding.\n\nIt has been replaced... | [] | [] | [
[]
] | ||
ppavr | Does speciation happen spontaneously from one generation to the next or does it take place over many generations? | I want to find out if the process of creating a new species happens from one generation to the next, or if it's something that happens over many generations. Is there a scientific way to measure that a new species was created? Have any predictions/experiments been made on the subject of speciation?
Thanks | askscience | http://www.reddit.com/r/askscience/comments/ppavr/does_speciation_happen_spontaneously_from_one/ | {
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"text": [
"The classical view of speciation is one of taking many generations. In this view, two populations of a given species become reproductively isolated by some mechanism (it can be a physical barrier such as a mountain range or migration of one popul... | [] | [] | [
[
"http://onlinelibrary.wiley.com/doi/10.1111/j.0014-3820.2001.tb00628.x/abstract"
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] | |
d6rtgd | Is it valid to separate the Medieval Era from the Classical Era outside of Europe? | I know my question is a little vague and is based on Eurocentric/Marxist education I got. In its context, it makes sense to talk about vague periods of time. Prehistoric times with no complex economic relationships, Slavery times in classical era, Feudal relationships in Medieval times, Capitalism afterward. It makes s... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/d6rtgd/is_it_valid_to_separate_the_medieval_era_from_the/ | {
"a_id": [
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"text": [
"You can check some answers in this similar question thread: _URL_0_"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/ajsfw6/is_it_proper_to_use_the_terms_medieval_or_middle/"
]
] | |
1p014a | What proportion of the mass of the universe is star, rock/planet, gas? | Are there any other large amounts of mass the type of which I have not listed?
Just realised I had no idea, and it seems important. I have no handle on the distribution whatsoever. | askscience | http://www.reddit.com/r/askscience/comments/1p014a/what_proportion_of_the_mass_of_the_universe_is/ | {
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"If we talk strictly about matter itself, visible/ordinary matter like what you're talking about comprises only 31% of the known mass in the universe. The rest of it is cold dark matter, which we cannot observe directly but... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Universe#Size.2C_age.2C_contents.2C_structure.2C_and_laws"
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] | |
2bz9yz | why does a 20x30 rectangle have less area than a 25x25 square, when the perimeter of each is the same? | I can do the math and understand that this is the case, but I simply cannot wrap my head around this. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2bz9yz/eli5_why_does_a_20x30_rectangle_have_less_area/ | {
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" > I can do the math and understand that this is the case, but I simply cannot wrap my head around this.\n\nThe shape with the smallest perimeter-to-area ratio is the circle. It'... | [] | [] | [
[],
[],
[
"http://eatst.foodnetwork.ca/blog/wp-content/uploads/2013/03/Red_Cross.png"
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[]
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9b0bfp | corporate tax cuts | When people say they reinvest this money into themselves, what do they mean? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9b0bfp/eli5_corporate_tax_cuts/ | {
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"text": [
"Walmart earned 127 million USD gross profit last year. They held on to some of that but also paid each shareholder a dividend of 2.04 USD for each common stock they held. You can see their dividend history [here](_URL_0_).... | [] | [] | [
[
"http://stock.walmart.com/investors/stock-information/dividend-history/default.aspx"
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3fx8m3 | If I took two different ant colonies and put them in the same ant farm, what would happen? Would the two colonies go to war, or would they combine to make a bigger colony? | askscience | http://www.reddit.com/r/askscience/comments/3fx8m3/if_i_took_two_different_ant_colonies_and_put_them/ | {
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"For the most part, assuming there were equal numbers of ants from each colony and that they were conspecific, you would have almost total carnage. It would be the kind of battle that may only have one survivor and she may not make it very long af... | [] | [] | [
[]
] | ||
7kf5xf | if a big rig is considered a "semi" what is a full truck? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7kf5xf/eli5_if_a_big_rig_is_considered_a_semi_what_is_a/ | {
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"text": [
"The word is an abbreviation for [semi-trailer truck.](_URL_0_)\n\nIt's not half a truck. Rather, the trailer is only half behind the tractor -- and half on top of it."
]
} | [] | [] | [
[
"https://en.wikipedia.org/wiki/Semi-trailer_truck"
]
] | ||
206bnl | What are the origins and justification for compulsory military service (conscription/the draft)? | This question is inspired by a thread in /r/badhistory, where a lot of people were trying to argue that the draft was a form of "slavery" or "slave labor."
Can someone explain the history of the notion that citizens have an "obligation" to fight for the state? When did this notion first become broadly accepted, and w... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/206bnl/what_are_the_origins_and_justification_for/ | {
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"Oh! This is a *great* question! First off, you're right to make a distinction between \"the draft\" and conscription. They're two **very** different things! \n\n- **A Draft** is when the Army needs a specific number of men to sustain it's forces... | [] | [] | [
[]
] | |
7f8obr | Why did the Ottoman Empire, already knowing the value of oil, never take control of the vast desert of Arabia? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7f8obr/why_did_the_ottoman_empire_already_knowing_the/ | {
"a_id": [
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"Well, a few things.\n\nFirst, it's important to know where the oil is: _URL_0_\n\nMost of the Arabian peninsula doesn't have oil; it's concentrated almost entirely along the Persian Gulf coast in modern states like the UAE, Kuwait, Bahrain and in... | [] | [] | [
[
"http://gulf2000.columbia.edu/images/maps/Oil_Persian_Gulf_Caspian_Sea_lg.png"
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1jet8q | How does Jadeite form and how is it brought to the surface? | I'd like to know about Jadeite in some detail.
- How does it form?
- Are there more ways than one to form Jadeite?
- How does it outcrop on the surface when it forms in subduction zones (blueschist facies) or deeper (eclogite facies)?
- At what point in a subduction zone complex would it form (in the down going... | askscience | http://www.reddit.com/r/askscience/comments/1jet8q/how_does_jadeite_form_and_how_is_it_brought_to/ | {
"a_id": [
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"text": [
"This question (or more aptly, *research project*) would be more appropriately directed to /r/geology, [Wikipedia](_URL_0_), [Google](_URL_1_) or all of the above. Good luck with your research."
]
} | [] | [] | [
[
"https://en.wikipedia.org/wiki/Jadeite",
"https://www.google.com/?q=jadeite+geology"
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eamds6 | how did we humans learn how to communicate with each other? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eamds6/eli5_how_did_we_humans_learn_how_to_communicate/ | {
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"At the earliest level, we only knew how to grunt and screech, like any other ape. But we had the intelligence to try and communicate, and so when we needed something from someone, we developed specific grunts and screeches ... | [] | [] | [
[],
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1947we | Quality of life in the Byzantine Empire | How was the quality of life in the Byzantine Empire compared with that in Early Medieval Europe?
Since the Byzantine Empire lasted forever lets set our time period for roughly in the Age of Justinian.
EDIT: Changed the time period to whittle down the enormous amount of time I had earlier. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1947we/quality_of_life_in_the_byzantine_empire/ | {
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"Large permanent structures (including middle class housing), coinage, mass-produced high quality pottery, and lower-class literacy all ... | [] | [] | [
[],
[],
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"http://books.google.ca/books?id=hs3iEyVRHKsC&pg=PA79&vq=%22as+squalid+and+fetid+and+in+many+places+harmed+by+permanent+darkness,+for+the+wealthy+overshadow+the+streets+with+buildings%22&source=gbs_quotes_r&cad=5#v=onepage&q=%22as%20squalid%20and%20fetid%20and%20in%20many%20pla... | |
1crs2y | Just how far did cultures whiten their skin? | In various cultures in the past(though i'm mainly talking about the European nobility who stayed inside to become pale and "blue blooded") fairer skin was prized, but how far did they whiten their skin?
In media it's usually shows the nobility as having chalk white skin due to make up,is that accurate or did they ad... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1crs2y/just_how_far_did_cultures_whiten_their_skin/ | {
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"text": [
"[Venetian Ceruse](_URL_0_) was widely used through the late middle ages, as one example. It was extremely toxic, and I believe Queen Elizabeth I is known to have suffered from extreme skin pitting because she used it so heavily.\n\nThat's going p... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Venetian_ceruse"
]
] | |
17k1av | how has srs not been banned for sub invasion and deliberate downvoting? | Just a thought that pooped into my head.
Edit: I meant popped into my head | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/17k1av/how_has_srs_not_been_banned_for_sub_invasion_and/ | {
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"Because SRS does not officially support those things. It wouldn't be fair to ban a subreddit because of something... | [] | [] | [
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8gjzog | What is the most destructive animal on the planet; other than humans? | It can be a school, flock, pack, etc; or it can be an animal that works alone (breeding partners included). | askscience | https://www.reddit.com/r/askscience/comments/8gjzog/what_is_the_most_destructive_animal_on_the_planet/ | {
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"text": [
"It's hard to quantify destructiveness in ecological relationships. Something like locusts may cause a lot of disruption to plant life, but that provides opportunities for new plants to grow, and the locusts themselves become... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Paleoproterozoic",
"https://en.wikipedia.org/wiki/Huronian_glaciation"
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] | |
1r1lun | what kind of circulatory system do spiders have? | It's almost 2am and I suddenly have a pressing need to know the answer to this. I tried googling it but my tired brain just got more confused. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1r1lun/eli5_what_kind_of_circulatory_system_do_spiders/ | {
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"It's called an \"open circulatory system.\"\n\nIt basically means that all the goop in them sloshes around freely inside of them. They're so small that a single heart valve runs from one end to the other, and the blood moves through the body cavi... | [] | [] | [
[
"http://science.howstuffworks.com/zoology/insects-arachnids/spider1.htm"
]
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al0iyg | what is 99.9% "empty space" in an atom, exactly? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/al0iyg/eli5_what_is_999_empty_space_in_an_atom_exactly/ | {
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" > I read that an atom consists of 99.9% empty space (and the nucleus inside, too) - so what exactly is there? \n\nNothing. It's empty. If something was there, it wouldn't be cal... | [] | [] | [
[],
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2htapl | How can a speaker replicate two sounds at once if it only has one diaphragm? | For example two violins makes two separate waves when bowed which translates to air waves. our ear is literally hears waves originating from two different points but with a speaker you have one diaphragm producing two three ten twenty or more notes and frequencies simultaneously. how is this possible when there is only... | askscience | http://www.reddit.com/r/askscience/comments/2htapl/how_can_a_speaker_replicate_two_sounds_at_once_if/ | {
"a_id": [
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"score": [
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"text": [
"A violin string is vibrating in a relatively simple manner - a standing wave and maybe some harmonics.\n\nA speaker is vibrating in a more complex manner - each of the waves for each of the sounds in question is essentially ... | [] | [] | [
[],
[]
] | |
131q6c | How accurate is the movie 'Mississippi Burning'? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/131q6c/how_accurate_is_the_movie_mississippi_burning/ | {
"a_id": [
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"text": [
"Hi there - it's been a little while but I did actually write some coursework on this film a while back. \n\nThe first thing to remember about any film or novel as a historical source is that the events ... | [] | [] | [
[],
[],
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] | ||
2vrk7f | what causes an spinning image to look like it is rotating one direction, stop, then appear to rotate the other direction? | This [video](_URL_0_) of a tire shows the effect at 2:00.
| explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vrk7f/eli5_what_causes_an_spinning_image_to_look_like/ | {
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"text": [
"This is called the [wagon wheel effect](_URL_0_). You perceive this because of the interaction between the timing of the spokes on t... | [] | [
"http://youtu.be/v8T8Xcmyz88?t=2m"
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[
"http://en.wikipedia.org/wiki/Wagon-wheel_effect"
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[],
[],
[],
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"http://en.wikipedia.org/wiki/Aliasing"
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b91s9t | During the westward expansion in the United States, how were the terrains of the Rocky Mountains and the desert areas (such as the Mojave) safely navigated and crossed by people with horses and carts who were attempting to reach the west? | Between the high altitudes of the Rockies and the scarce water in the desert, I’m sure this was no easy feat during the westward expansion. How did families and individuals with horses and carts navigate and cross these regions? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/b91s9t/during_the_westward_expansion_in_the_united/ | {
"a_id": [
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"text": [
"First of all, the American West had been fairly well explored by people from the East before emigrants started the westward treks., so they could rely on maps and guidebooks - as well as fairly well-defined trails to direct their passage. These ... | [] | [] | [
[
"https://www.aoc.gov/art/other-paintings-and-murals/westward-course-empire-takes-its-way"
]
] | |
2503q5 | without sequestering, how do courts ensure that the jury has not had any outside influence about the case? | Like in a case that might be big in the state, but not nationwide, how does the court keep the jury from looking at the news or learning about the case outside the courts? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2503q5/eli5_without_sequestering_how_do_courts_ensure/ | {
"a_id": [
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"text": [
"They use sequestering. Sorry if it sounds like a smart-ass answer, but the fact is that if they want to remove outside influence, that's how they do it. It's like asking, \"How do cops catch criminals without arresting them?\" Well, they don't, t... | [] | [] | [
[]
] | |
2q8qy4 | Why is it that good cheese is mainly a Western thing? | I always see/know of European cheeses, but I've never heard of good Chinese or Eastern cheese...but they had cattle and milk. So why is it I've heard of fancy French cheese but not fancy Thai cheese? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2q8qy4/why_is_it_that_good_cheese_is_mainly_a_western/ | {
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"text": [
"In Korea, the particular breed/s of cattle they had produced very little milk. Cows were kept for work, nothing else. \n\nAccording to the annals of Chosun (조선왕조실록), when a king ... | [] | [] | [
[],
[],
[
"http://www.amazon.com/Milk-Surprising-Story-Through-Ages-ebook/dp/B00C4BA48Q/ref=sr_1_5?s=books&ie=UTF8&qid=1419447866&sr=1-5&keywords=milk"
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[]
] | |
ek94ar | how do planes not become covered in ice when flying in -70f temperatures? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ek94ar/eli5_how_do_planes_not_become_covered_in_ice_when/ | {
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"score": [
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"text": [
"Ice requires two things to form. It needs to be cold, which we have, and there needs to... | [] | [] | [
[],
[],
[],
[],
[],
[
"https://en.wikipedia.org/wiki/British_Airways_Flight_38",
"https://en.wikipedia.org/wiki/British\\_Airways\\_Flight\\_38"
],
[
"https://en.m.wikipedia.org/wiki/British_Airways_Flight_38"
],
[
"http://www.aerospaceweb.org/question/planes/q0199a.shtml"
]
] | ||
659cxh | why are some smells harder to wash out of your skin than others? e.g.; perfume vs. bleach | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/659cxh/eli5_why_are_some_smells_harder_to_wash_out_of/ | {
"a_id": [
"dg8hnx2"
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"score": [
3
],
"text": [
"Some asorb in. Perfume is menthol based so evaporates. Where as bleach is acid based and will burn in to your pores"
]
} | [] | [] | [
[]
] | ||
a6em81 | why do rooms look darker after spending time in the sun? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a6em81/eli5_why_do_rooms_look_darker_after_spending_time/ | {
"a_id": [
"ebu570w",
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"score": [
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3
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"text": [
"Your pupils constrict in the presence of bright light. After spending time outside, your pupils are constricted, so when you enter a darker room, less light is entering your eyes. Thus the room looks darker till your pupils ... | [] | [] | [
[],
[]
] | ||
mp3d4 | Can anyone explain how a mimosa plant can sense touch? | I decided to check out my university's greenhouse the other day and found myself amazed by the ability for mimosa leaves to close upon touch. My knowledge of biology is limited to one intro course (However, I've been more and more interested and I'm considering minoring in bio).
TL,DR - Mimosa leaves blow my mind, how... | askscience | http://www.reddit.com/r/askscience/comments/mp3d4/can_anyone_explain_how_a_mimosa_plant_can_sense/ | {
"a_id": [
"c32sqq2",
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"text": [
"First of all, it is important to know that you are looking at a compound leaf. Each little \"leaf\" is actually a leaflet, and the leaf itself is the larger structure that they make up.\n\nAt the base of each leaflet, there... | [] | [] | [
[
"http://en.wikipedia.org/wiki/File:Pulvinus.png"
],
[
"http://en.wikipedia.org/wiki/File:Pulvinus.png"
]
] | |
34h1c0 | How were people born with physical or mental handicaps treated by various Native American tribes? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/34h1c0/how_were_people_born_with_physical_or_mental/ | {
"a_id": [
"cquw24b"
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"text": [
"In the case of some Mesoamerica peoples such as the Maya physical deformity was seen as a sign of favor from the gods. A good example of this can be found in the ancient city of Dziblichaltun (in the Yucatan) where excavations in a ceremonial te... | [] | [] | [
[
"http://media-cdn.tripadvisor.com/media/photo-s/01/1f/6e/8d/seven-dolls.jpg",
"http://imgur.com/rRUEsdn",
"http://maya.nmai.si.edu/sites/default/files/resources/The%20Legend%20of%20the%20Dwarf%20and%20the%20Governor%20of%20Uxmal.pdf"
]
] | ||
lv4qp | what is the acta and what will change in the eu if it's passed? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/lv4qp/eli5_what_is_the_acta_and_what_will_change_in_the/ | {
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"text": [
"[The EFF has written this](_URL_0_), which is a little above 5 year old level, and is a good, short explanation which I think is a good place to start.",
"It makes the people w... | [] | [] | [
[
"https://www.eff.org/issues/acta"
],
[],
[
"https://www.eff.org/issues/acta"
],
[]
] | ||
p4495 | Do stars appear and disappear from our vision of the sky? | I'm aware that what we see of stars are just the light they give off, but in our short history of the earth have we observed the light the stars give off appear or disappear from the night sky? And if so how often does this happen? | askscience | http://www.reddit.com/r/askscience/comments/p4495/do_stars_appear_and_disappear_from_our_vision_of/ | {
"a_id": [
"c3mch4i"
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"score": [
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"text": [
"We have observed supernovae over history, and these have in the past been huge events. Past civilizations were very focused on the heavens and the skies, and when suddenly a close enough supernova happened, which would appear as a very bright sta... | [] | [] | [
[]
] | |
w22mz | what's stopping us from building a real-life lightsaber? | Title. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/w22mz/eli5_whats_stopping_us_from_building_a_reallife/ | {
"a_id": [
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"score": [
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2,
2
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"text": [
"[Searched](_URL_2_)\n\nRelevant [discussion](_URL_0_)\n\nOriginal question by [PhoneySoprano](_URL_3_)\n\n > Theoretically, are they or would they ever be possible?\n\nRelevant comment courtesy [deains]... | [] | [] | [
[
"http://www.reddit.com/r/explainlikeimfive/comments/s0ju8/eli5_lightsaber/",
"http://www.reddit.com/user/http://www.reddit.com/user/deains",
"http://www.reddit.com/r/explainlikeimfive/search?q=lightsaber&restrict_sr=on&sort=relevance",
"http://www.reddit.com/user/PhoneySoprano"
],
[],
... | |
2onklr | Did any ancient civilizations write or tell post apocalyptic stories? | As the title asks, did other civilizations write/tell post apocalyptic stories, or is it more of a modern creation? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2onklr/did_any_ancient_civilizations_write_or_tell_post/ | {
"a_id": [
"cmoujqn"
],
"score": [
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"text": [
"Define ancient. Most apocalyptic stories of the past revolve around religion. Such as nordic mythology and ragnarok or the 3 abrahamic religions which all have an apocalyptic scenario. Do you mean for Ancient Greece and Rome? In Greek mythology ... | [] | [] | [
[
"http://www.billstifler.org/HUM2130/files/2D-003-00-apocalypse.htm"
]
] | |
1iltoz | Have most civilizations throughout history recognized 4 primary seasons, or were alternate seasons defined? What about areas with limited climate or areas with consistently diverse/unpredictable climate? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1iltoz/have_most_civilizations_throughout_history/ | {
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6,
3,
3,
5
],
"text": [
"I'm not a historian. Just here to point out that even today \"most civilizations recognize 4 seasons\" is wrong. Near the equator there are two seasons rainy... | [] | [] | [
[],
[],
[],
[
"http://en.wikipedia.org/wiki/Ritu_%28Indian_season%29"
],
[
"http://www.reddit.com/r/AskHistorians/wiki/rules#wiki_no_.22in_your_era.22_or_.22throughout_history.22_questions"
]
] | ||
874tkf | Do children of same-sex marriages have more emotional problems than heterosexual marriages? | Hi! I'm not entirely sure what to make of the issue. I was pretty convinced by other studies, until someone presented me with [this article](_URL_0_).
I'm skeptical, on account of the source, but I'm not too understanding of how these studies work. Are the findings in this article solid or not? | askscience | https://www.reddit.com/r/askscience/comments/874tkf/do_children_of_samesex_marriages_have_more/ | {
"a_id": [
"dwasogm"
],
"score": [
22
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"text": [
"With a quick look on this, it seems as if whoever wrote the paper went out of their way to look for negative studies. Article on a website against gay marriage is also a basic indicator not to trust it.\n\nAlso, with any field, you get studies t... | [] | [
"https://thembeforeus.com/study-studies-same-sex-parenting/"
] | [
[
"http://whatweknow.law.columbia.edu/topics/lgbt-equality/what-does-the-scholarly-research-say-about-the-wellbeing-of-children-with-gay-or-lesbian-parents/"
]
] | |
7tfg0k | Have Jewish people of non-binary genders been documented before the modern era? | I know this is a broad, possibly example-seeking question, but I can't think of a way to word it that isn't restrictively narrow. [This Reform Judaism blog post](_URL_0_) talks simply about gender identities beyond male and female, including what we today would call transgender people.
My question is, have existing pe... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7tfg0k/have_jewish_people_of_nonbinary_genders_been/ | {
"a_id": [
"dtcbn4x"
],
"score": [
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"text": [
"Most of these four categories here are not of transgender people but rather intersex people. Unlike some traditions where self-understanding is crucial (i.e. South Asian and Native North American “[third genders](_URL_8_)”), [Chazal](_URL_6_) ar... | [] | [
"https://reformjudaism.org/jewish-lifesocial-justice-advocacy/jewish-views-on%E2%80%A6/health-wellnesscivil-rights/gender-diversity"
] | [
[
"https://en.wikipedia.org/wiki/Genesis_Rabbah",
"http://www.jewishencyclopedia.com/articles/5904-eunuch",
"https://www.sefaria.org/Yevamot.64b?lang=bi",
"http://www.sojourngsd.org/blog/sixgenders",
"http://www.sojourngsd.org/blog/aylonit",
"https://jwa.org/encyclopedia/article/gender-ident... | |
em554e | "The rise and fall of the third reich" as a source for the war in the east? | I am reading William Shirer's rise and fall of the third reich. Over all the book has been tremendously informitive. The majority of the sources in it are derived from the nazi archives seized after the war. And while that may give great insight into the internal workings amd history of the Nazi regime, I don't know if... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/em554e/the_rise_and_fall_of_the_third_reich_as_a_source/ | {
"a_id": [
"fdnd5zz"
],
"score": [
3
],
"text": [
"[You'll likely find this older answer to be of use to you](_URL_0_)."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/bytjch/how_much_history_is_the_english_speaking_world/eqmsxb2/"
]
] | |
390z83 | if it takes ~1000 gallons of water to produce a pound of beef, why is beef so cheap? | The NYT has this interesting page, which claims a pound of beef requires 786 gallons of water to produce. A Stanford water conservation site claims 1800 gallons.
_URL_0_
_URL_1_
My cheapest tier of water costs $3.49/'unit', which is $4.66 for 1000 gallons of water. This suggests that _just the water cost_ of a pou... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/390z83/eli5if_it_takes_1000_gallons_of_water_to_produce/ | {
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"crzlaq3",
"crzlcyk",
"crzldkx",
"crzlu4x",
"crzn3w7",
"c... | [] | [
"http://www.nytimes.com/interactive/2015/05/21/us/your-contribution-to-the-california-drought.html",
"https://sustainable.stanford.edu/water-wise"
] | [
[],
[],
[],
[],
[],
[],
[],
[],
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"http://www.pcrm.org/good-medicine/2007/autumn/health-vs-pork-congress-debates-the-farm-bill",
"http://www.publiclandsranching.org/book.htm"
],
[],
[],
[],
[],
[],
[
"http://www.care2.com/causes/the-true-cost-of-meat-demystifying-agri... | |
5nh0g1 | what happens when our lips are chapped? | More specifically, what causes that and why does licking them make your lips worse?
EDIT: Thanks so much for so many responses. This place is always helpful. :) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5nh0g1/eli5_what_happens_when_our_lips_are_chapped/ | {
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"dcbs9xf",
"dcbxj41",
"dcbxkh2",
"dcc0qub",
"dcc1fu6",
"d... | [] | [] | [
[],
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"http://www.today.com/style/put-down-lip-balm-doctor-approved-list-chapped-lips-do-t69466"
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dlphhv | Could anyone help me identify the language/perior or possibly even the manuscript? | Hello!
I've been researching some film graphic props for some time now (I'm a production design student), and I encountered a prop from one of the Potter films that uses a type that doesn't realy seem all that legible to me, nor does it match any scripts I've ever seen. I've set my goal to find the original manuscript... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/dlphhv/could_anyone_help_me_identify_the_languageperior/ | {
"a_id": [
"f4tnfst"
],
"score": [
4
],
"text": [
"The Triwizard one looks like medieval Latin, but it’s got too much stuff on to of it to see clearly, unfortunately. It could be nonsense though, just made to look medieval…\n\nThe stuff under Weasley’s Self-Writing Quills is from a 16th century I... | [] | [
"https://imgur.com/a/rprBN49",
"Archive.org",
"https://Archive.org"
] | [
[
"https://www.persee.fr/doc/galim\\_0753-5015\\_2012\\_num\\_59\\_2\\_2012",
"https://www.persee.fr/doc/galim_0753-5015_2012_num_59_2_2012"
]
] | |
3lawc7 | how condensed milk turns into caramel? | I was watching a cooking video and he boiled some condensed milk and it turned into caramel. Anyone know why it turns into caramel? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3lawc7/eli5_how_condensed_milk_turns_into_caramel/ | {
"a_id": [
"cv4ol31"
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"score": [
2
],
"text": [
"Milk naturally has sugar in it, lactose. When sugars are heated, sugars breaks apart and form all sorts of new compounds, flavors and aromas and colors we call caramel."
]
} | [] | [] | [
[]
] | |
2aw3dm | Is the zero gravity of open space ever truly zero gravity? | A front page post sparked the question. I would assume that a small amount of gravity is constantly playing it's part. I would think that the gravity created by distant stars and planets would have at least a small (however, virtually unnoticeable) effect. | askscience | http://www.reddit.com/r/askscience/comments/2aw3dm/is_the_zero_gravity_of_open_space_ever_truly_zero/ | {
"a_id": [
"cizhnq9"
],
"score": [
3
],
"text": [
"Going by Newtonian gravitation, all physical bodies are always exerting forces on each other--you on me, me on you, both of us on the Sun, the Sun on both of us. The magnitude of the force decreases with the square of the distance between the cen... | [] | [] | [
[]
] | |
179xkt | Is there any evidence of Indian Philosophy altering Greek Philosophy during the Hellenistic Period following Alexander's attempt to conquest the known world? | In reading Collingwood's analysis of Greek "history," he mentions the shift in Greek philosophy during the late Hellenistic period by the Stoics and Epicureans as moving from thinking in a manner of attempting to control the outside world, to preserving the integrity of the mind despite the outer chaos. (p. 35-36, *Th... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/179xkt/is_there_any_evidence_of_indian_philosophy/ | {
"a_id": [
"c83k42k",
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"score": [
3,
3,
7,
3,
2
],
"text": [
"I really should have looked over my question, as now I am stuck with that horrendous abuse of the English language now out on the web.",
"So many of the b... | [] | [] | [
[],
[],
[],
[
"http://books.google.com.ar/books/about/El_c%C3%ADrculo_de_la_sabidur%C3%ADa.html?id=GHCtboCpzTkC&redir_esc=y"
],
[
"http://en.wikisource.org/wiki/Autobiography_of_a_Yogi/Chapter_41",
"http://www.amazon.com/Invasion-Alexander-Described-Diodorus-Plutarch/dp/0766189201/",
"... | |
azgix3 | Where and how can boron be obtained other than by refining on Earth? | I'm working on a fairly hard science fiction story in which proton-boron fusion is the main source of power. I've been looking all over the 'net for extraplanetary sources of boron, but I haven't found anything useful.
Is there boron that could be mined from asteroids? Could it be manufactured in particle accelerato... | askscience | https://www.reddit.com/r/askscience/comments/azgix3/where_and_how_can_boron_be_obtained_other_than_by/ | {
"a_id": [
"ei7pmkt"
],
"score": [
5
],
"text": [
"Boron is produce when cosmic rays hit each other, and in supernovas, so for you to manufacture it with particle acceleration you would need more than a gas giant worth of energy to fuse together the nessesary atoms. And yes boron can be found in... | [] | [] | [
[]
] | |
1a1hr0 | Pluto's orbit and the plane of the ecliptic i.e. the nasty details of orbital mechanics | Something from the Wikipedia entry on [Pluto](_URL_0_) (second paragraph of that link) has me confused. To paraphrase, it says that Pluto is furthest from the plane of the ecliptic when at perihelion; that is, it is further away from the average plane of the main planetary bodies when it itself is at the closest point ... | askscience | http://www.reddit.com/r/askscience/comments/1a1hr0/plutos_orbit_and_the_plane_of_the_ecliptic_ie_the/ | {
"a_id": [
"c8t8loh"
],
"score": [
3
],
"text": [
" > This means that when Pluto is nearest the Sun, it is at its farthest **above** the plane of the Solar System\n\nI'm pretty sure what you're thinking is correct. As far as I can tell, by above they mean 'in the direction the Sun's rotational an... | [] | [
"http://en.wikipedia.org/wiki/Pluto#Other_factors",
"http://www.mathopenref.com/anglesvertical.html"
] | [
[]
] | |
3hva8z | why do formula one look like super technological advanced driving vehicles, while nascars just look like cars? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3hva8z/eli5_why_do_formula_one_look_like_super/ | {
"a_id": [
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3,
2
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"text": [
"Nascar and stock car racing evolved out of redneck bootleggers with a carload of moonshine trying (and usually succeeding) to outrun law enforcement back during prohibition. They did this using every... | [] | [] | [
[],
[],
[]
] | ||
fzh67i | Hi I have a question about horses. | Hello, I just wanted to ask if horses were bread differently back during olden times when a horse needed to be strong rather than fast and graceful. I remover a professor telling me that horse were bread for strength and stamina rather than speed and grace. If this is true are there places you can see what older horse... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/fzh67i/hi_i_have_a_question_about_horses/ | {
"a_id": [
"fn4v9vz",
"fn4fth1"
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"score": [
2,
5
],
"text": [
"Ok thank you!!",
"Insofar as comparing modern breeding with historical...this is AskHistorians and there is a 20-year rule for the sub so I will not make any statements about modern breeding (save the one I make at the e... | [] | [] | [
[],
[
"https://research.britishmuseum.org/research/collection_online/search.aspx",
"http://imh.org/exhibits/online/"
]
] | |
2pm7l1 | How is the Battle of Thermopylae recorded in Persian records? | Wikipedia makes references to Herodatus, Diodorus, and Pausanias, all of whom were Greek (not to mention not all were even alive in that era), with Herodatus being the main source on the battle. But what kind of sources survive from the Persian perspective, if anything? And if nothing survives, does that say anything i... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2pm7l1/how_is_the_battle_of_thermopylae_recorded_in/ | {
"a_id": [
"cmy228k"
],
"score": [
5
],
"text": [
"No Persian accounts survive, unfortunately, though I suspect that Xerxes would not have publicly commemorated a war that resulted in his own retreat. Some scholars actually doubt whether the Persians produced any historiography at all--the closes... | [] | [] | [
[
"http://www.livius.org/be-bm/behistun/behistun01.html"
]
] | |
a3k62k | How long did it take for Roosevelt to learn of the bombings at Pearl Harbor? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a3k62k/how_long_did_it_take_for_roosevelt_to_learn_of/ | {
"a_id": [
"ebb6w64"
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"score": [
5
],
"text": [
"Only about an hour actually.\n\nFDR had begged off from a lunch engagement with Elanor and guests and was in the Yellow Oval Room in the residence that afternoon(DC is 5hrs ahead of Hawaii). He used the room as his personal study, kept his numero... | [] | [] | [
[]
] | ||
2101vy | laser printers | I've always wondered how these magical beasts work. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2101vy/eli5_laser_printers/ | {
"a_id": [
"cg8b886"
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"score": [
6
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"text": [
"There is a drum in the printer which is statically charged, but covered in a material which causes the charge to dissapate when exposed to light.\n\nThe laser is used to draw a negative image of the print on the drum, the drum then passes over to... | [] | [] | [
[]
] | |
8q6asw | how is it more profitable to produce new porn instead of recycling overabundant available supply? | At this point it feels like porn is everywhere and in limitless supply. From a purely economic perspective how is it still profitable to produce new videos when producers could simply rerun or recycle what they already have and never run out? The sheer quantity available is already enough to guarantee that someone coul... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8q6asw/eli5_how_is_it_more_profitable_to_produce_new/ | {
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"text": [
"For the same reason why we keep creating new kinds of food instead of just making more o... | [] | [] | [
[],
[],
[],
[],
[],
[],
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[
"Audible.com"
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8mc9tf | how does a metal detector not detect itself? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8mc9tf/eli5_how_does_a_metal_detector_not_detect_itself/ | {
"a_id": [
"dzmegl1",
"dzmehaf",
"dzmg6xx",
"dzmiqqt",
"dzmjzwt",
"dzmrv3s",
"dzmudeh"
],
"score": [
52,
508,
62,
9,
8,
2,
2
],
"text": [
"A metal detector puts out a magnetic field and looks for disturbances in it caused by the presence of other me... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | ||
caogrh | How did the Dutch and the British build such huge navies, given the few forests remaining on their territory ? | I'm reading a book where it says in 1664 the British had 4000 high seas ships and the Dutch had 16000 (!), whereas France only had 400.
There are a lot of forests in France, some of which were planted just for that, but I know there wasn't much in England or Netherlands.
Did they build ships with timber from the coloni... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/caogrh/how_did_the_dutch_and_the_british_build_such_huge/ | {
"a_id": [
"eta0nup"
],
"score": [
24
],
"text": [
"The relatively short answer to this is that Britain at least (I can't speak to the Dutch) used to be much more forested than it is, and that it was deforested in part because of the need to build a large fleet for defense. \n\nBut Britain (and o... | [] | [] | [
[
"http://www.academia.edu/3258279/A_Plague_of_Ships_Spanish_Ships_and_Shipbuilding_in_the_Atlantic_Colonies_Sixteenth_and_Seventeenth_Centuries",
"http://books.google.com/books/about/The_Bombay_Dockyard_and_the_Wadia_Master.html?id=75DWAAAAMAAJ",
"https://www.reddit.com/r/AskHistorians/comments/44sivx/... | |
b6fdl6 | what is bankrupcy? where does the debt go? | I was reading a post that bankrupcy protects assets (car house etc) within limits. So if i by a house and declare bankruptcy it won't get taken away? Why wouldn't more people do that?
What's the difference in chapters?
I realize it ruins your credit for 7 years but wouldn't it be worth it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b6fdl6/eli5_what_is_bankrupcy_where_does_the_debt_go/ | {
"a_id": [
"ejk1kt2",
"ejk4zgl",
"ejk62ee",
"ejkot77",
"ejlbks4"
],
"score": [
2,
5,
42,
52,
2
],
"text": [
"You’d likely lose your house. The assets you keep are decided by the court based on what you need to keep your job. It will also decide what gets sold to g... | [] | [] | [
[],
[],
[],
[
"SummitFe.org"
],
[]
] | |
8lnyo5 | how do some companies hold so much cash? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8lnyo5/eli5_how_do_some_companies_hold_so_much_cash/ | {
"a_id": [
"dzh2aw6"
],
"score": [
5
],
"text": [
"The term \"cash\" is used to refer to the liquid assets a company holds, almost none of which is literal *cash*, and often very little of which is just money in bank accounts. For companies such as Apple, their \"cash\" is primarily treasury note... | [] | [] | [
[]
] | ||
4qejse | I've heard reading temporarily boosts your short-term memory, how true is this? And does reading impact long term memory at all? | Sorry in advance, not sure if this would should be categorized as Psychology, Neurology, or Biology. | askscience | https://www.reddit.com/r/askscience/comments/4qejse/ive_heard_reading_temporarily_boosts_your/ | {
"a_id": [
"d4t96xn"
],
"score": [
2
],
"text": [
"This should be under neurology. \n\nI can't remember where I read this, but reading does improve short-term memory to an extent, as all cramming college students can attest to. As far as long-term memory, reading can't do anything significant by... | [] | [] | [
[]
] | |
6c1ekt | how do big transactions (weapon sales to states) between large entities work? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6c1ekt/eli5_how_do_big_transactions_weapon_sales_to/ | {
"a_id": [
"dhr6mg8"
],
"score": [
6
],
"text": [
"If we're talking specifically about weapons sales outbound from the US, they are a lot of the sales are brokered by the Department of Defense, through the [Foreign Military Sales](_URL_0_) program. \n\nBasically, defense contractor sells to the f... | [] | [] | [
[
"http://www.dsca.mil/programs/foreign-military-sales-fms"
]
] | |
cpl3na | why are vineyards always in hilly regions? | I've been driving around northern Michigan recently, and got too thinking why winery's/vineyards are all on hills. Does elevation change have something to do with it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cpl3na/eli5_why_are_vineyards_always_in_hilly_regions/ | {
"a_id": [
"ewq7xz6",
"ewqjvv4"
],
"score": [
4,
2
],
"text": [
"They aren't always. In California, they're in fields like normal crops. But the tendency may be because hilly land is harder to build on and farm with conventional crops. The land is cheaper and doesn't make vineyards that m... | [] | [] | [
[],
[]
] | |
3qz29x | how is it that smoking makes a person 2,500% more likely to develop cancer of some sort but it's not 100% guaranteed that you will | I read an article on r/fitness and it said a person is 2,500% more likely to develop cancer if they smoke. How is this not guaranteed that you will? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3qz29x/eli5_how_is_it_that_smoking_makes_a_person_2500/ | {
"a_id": [
"cwji8l7",
"cwji99g",
"cwjl9hl"
],
"score": [
29,
10,
6
],
"text": [
"2500% means 25 times more likely. 2500% of 3 is 75. So if, say, the non smoking population have a three percent chance of developing lung cancer this would mean smokers have a 75% chance.\n",
"250... | [] | [] | [
[],
[],
[]
] | |
20fqvo | how do we know when a car accident occurs whether the offender was texting while driving or not? | Do they get out of their car and say, "Sorry, I was texting!"? I'm sure that in some instances people confess to texting while driving, but are there instances of people checking the offenders phone to see what times they sent texts or anything like that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/20fqvo/eli5_how_do_we_know_when_a_car_accident_occurs/ | {
"a_id": [
"cg2smqs"
],
"score": [
2
],
"text": [
"The police will ask the driver if they have a cellphone and search the phone and/or subpoena the phone records."
]
} | [] | [] | [
[]
] |
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