q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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1df20m | why did certain countries like the usa and china experience an immense population boom in the 21st century, while countries like the united kingdom, france and germany barely saw any population increase at all? | edit: 20th century, not the 21st! Sorry. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1df20m/eli5_why_did_certain_countries_like_the_usa_and/ | {
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"You accidentally THE MOST CRUCIAL KEYSTROKE IN THE ENTIRE TITLE.\n\nThat being said, without immigration the US' population would be ... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Total_fertility_rate"
],
[
"http://www.eupedia.com/forum/threads/25061-Historical-populations-of-Europe-changing-proportions"
],
[
"http://en.wikipedia.org/wiki/Battle_of_the_Somme"
],
[
"http://en.wikipedia.org/wiki/Post%E2%80%93World_War_II_baby_bo... | |
7htw7x | How did the Portugese empire go from once spanning the whole world to it's current state as not even being a G20 country? How did such a drop off from prominence occur? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7htw7x/how_did_the_portugese_empire_go_from_once/ | {
"a_id": [
"dqud5nr"
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"text": [
"I covered a lot of reasons of early decline in power in [this post](_URL_1_).\n\n\nYou can also read this very nice and concise [thread](_URL_0_) by /u/nathanial_jones "
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/63quua/once_a_european_power_in_the_age_of_exploration/",
"https://www.reddit.com/r/AskHistorians/comments/6z8rq1/16th_century_portugal_was_a_powerhouse_what/dmtryho/"
]
] | ||
30karu | Czechs in the Austro-Hungarian Army | When researching World War One I often end up reading about the Czechoslovak Legion, and that lead me to an interest in Czechs in the Austrian Army. However I can't seem to find any information on them. Ergo, how many were there? Where did they fight? Did they have any great successes? And of course, were can I find mo... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/30karu/czechs_in_the_austrohungarian_army/ | {
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"Since no one answered I'll tell you what I know and give you a few things you can look up.\n\nSo, from a cemetery in Prague I know that they fought (and died) in Italy, places like Slovenia and Croatia, anywhere the Austrians fought.\n\nMany also... | [] | [] | [
[
"http://bohemican.com"
]
] | |
2sroli | if photons are mass-less and travel forever without friction, if i point my flashlight at the sky, do they travel forever? | friction with the atmosphere, bends the light?
My flashlight in space would be like a mini sun?
why does my flashlight with weak batteries on only produce a dim beam of light that does not extend far, what is exactly happening to the photons then? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2sroli/eli5_if_photons_are_massless_and_travel_forever/ | {
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"text": [
"Within the atmosphere, the photons are being absorbed by the molecules in the air. Those that are not absorbed are scattered, which is why in dusty air you can see the dust dancing in the air - it's the light bouncing off the dust particles and f... | [] | [] | [
[]
] | |
duvpa4 | what's the difference between veteran's day and memorial day? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/duvpa4/eli5_whats_the_difference_between_veterans_day/ | {
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"text": [
"My understanding is that Veteran's Day is meant to focus on the living veterans of the armed service, while Memorial Day is meant to focus on the _deceased_ members of the armed service who gave their lives in defense of the country.\n\nPractical... | [] | [] | [
[]
] | ||
63quua | Once a European power in the age of exploration, Portugal isn't seen as a mighty or influential nation in the world today. What caused this? | I know this question covers a long period of history. They often are covered in world history in the US during the 1400s but largely disappear from the history books into the 1500s and 1600s.
What events led to their general disappearance as other European powers rose and spread across the Western Hemisphere? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/63quua/once_a_european_power_in_the_age_of_exploration/ | {
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"text": [
"Not to discourage other answers, but while you're waiting, you might want to check out [The Decline of the Spanish Empire](_URL_1_) section of the wiki,... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/22dk9w/why_did_portugal_and_spain_fall_so_far_behind_the/cgmcfwt/",
"https://www.reddit.com/r/AskHistorians/wiki/faq/europe#wiki_the_decline_of_the_spanish_empire"
],
[],
[],
[],
[
"https://www.wook.pt/livro/historia-economica-de-portugal-pedr... | |
nyvkb | how computers turn 0's and 1's into text, video, and other programs/applications. | I'm having difficulty conceptualizing how computers "read" binary code, and translate into useful and understandable information. ELI5? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/nyvkb/eli5_how_computers_turn_0s_and_1s_into_text_video/ | {
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... | [] | [] | [
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"http://www.roubaixinteractive.com/PlayGround/Binary_Conversion/Binary_To_Text.asp"
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[],
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"http://gucky.uni-muenster.de/cgi-bin/rgbtab-en",
"http://www.asciitable.com/",
"ASCIItable.com"
... | |
yvjy3 | If I had a stationary slinky hanging from a mile up, and let go. Would the bottom stay in place until the top falls down to it? | A really scaled up version of THIS phenomenon for instance. Would it work?
_URL_0_ | askscience | http://www.reddit.com/r/askscience/comments/yvjy3/if_i_had_a_stationary_slinky_hanging_from_a_mile/ | {
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"text": [
"[Explanation](_URL_1_)\n\n[Longer slinky](_URL_0_)"
]
} | [] | [
"http://www.youtube.com/watch?v=rCw5JXD18y4&feature=g-all-u"
] | [
[
"http://www.youtube.com/watch?v=JsytnJ_pSf8",
"http://www.youtube.com/watch?v=eCMmmEEyOO0"
]
] | |
17ms7w | How important are genetics in sports? | askscience | http://www.reddit.com/r/askscience/comments/17ms7w/how_important_are_genetics_in_sports/ | {
"a_id": [
"c86x335"
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"score": [
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"text": [
"Approximately 17% of people are born without the ability to create fast-twitch muscle fibers. They have nonsense genes in place of the gene that allows the creation of fast twitch muscles. [One study](_URL_0_) showed that elite sprinters and powe... | [] | [] | [
[
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1180686/",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2668151/"
]
] | ||
1ku23q | If you stacked an infinite line of standard dominoes .5 inches apart and pushed one end knocking them over. Would the whole line fall, or would the energy eventually run out? | I was in bed last night wondering if the whole line would fall over, but I do not not think it would. If they do eventually lose the energy and teh dominoes stop falling, how many would fall before it stopped? | askscience | http://www.reddit.com/r/askscience/comments/1ku23q/if_you_stacked_an_infinite_line_of_standard/ | {
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"Have you seen the gifs or youtube videos about smaller dominos knocking over bigger and bigger dominos until the biggest ones are so... | [] | [] | [
[],
[],
[
"http://www.youtube.com/watch?v=5JCm5FY-dEY",
"http://en.wikipedia.org/wiki/Potential_energy"
],
[
"http://www.youtube.com/watch?v=y97rBdSYbkg"
],
[],
[]
] | |
29p9bj | what is it i'm actually smelling as a thunderstorm approaches? | Just today I walked outside to overcast skies, and I could smell the storm coming. What did I smell? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29p9bj/eli5what_is_it_im_actually_smelling_as_a/ | {
"a_id": [
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"score": [
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"text": [
"An electrical charge—from lightning or a man-made source such as an electrical generator—splits atmospheric nitrogen and oxygen molecules into separate atoms. Some of these recombine into nitric oxide, and this in turn reac... | [] | [] | [
[],
[]
] | |
a1kppx | After light slows traveling through a medium, does it accelerate back to c upon reentering a vacuum or does it remain the same velocity as it was the moment it exited the medium? | askscience | https://www.reddit.com/r/askscience/comments/a1kppx/after_light_slows_traveling_through_a_medium_does/ | {
"a_id": [
"earnckq"
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"text": [
"The idea of \"the speed of light in a medium\" is really just a helpful trick for simplifying a more complex phenomenon.\n\nWhat's really going on is that the incident wave, as it propagates through a material, causes charges in the material to ... | [] | [] | [
[]
] | ||
d7oc58 | why is mitochondria called "the powerhouse of the cell" and what is its relationship with atp? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d7oc58/eli5_why_is_mitochondria_called_the_powerhouse_of/ | {
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"text": [
"Your mum makes you meal so that you can get energy from food to play; mitochondria makes ATP so that cells have the energy to do what they need to do.",
"It's literally the org... | [] | [] | [
[],
[],
[],
[]
] | ||
5nlxk1 | Did Henry Ford say this quote, and what did he mean by it? | After a few google searches, I haven't been able to locate anything that points to him actually saying this. Most of the links that appear seem to be conspiracy-esque sites.
The quote in question:
"It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5nlxk1/did_henry_ford_say_this_quote_and_what_did_he/ | {
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"text": [
"That particular quote first appeared in *The American Mercury* in 1957 in an article [How Internationalists Gain Power](_URL_2_), and it is important to remember that the entire passage is prefaced with \"It was Henry Ford, Sr. who said *in subst... | [] | [] | [
[
"http://www.worldcat.org/title/my-life-and-work/oclc/123787342",
"http://www.worldcat.org/title/federal-reserve-hoax-formerly-the-federal-reserve-corporation-the-age-of-deception/oclc/3291128",
"http://www.unz.org/Pub/AmMercury-1957oct-00079?View=PDF"
]
] | |
fze530 | how are some munitions designed to detonate before they hit the ground/target? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fze530/eli5_how_are_some_munitions_designed_to_detonate/ | {
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"text": [
"In short, computers. Computers paired with some other instrument like an altimeter or simple radar that are programmed to detonate when a certain height/distance from the target is returned by the scann... | [] | [] | [
[],
[],
[]
] | ||
5lttzi | Before Loving v Virginia how common were non white mixed race marriages? | Loving V Virginia was a Supreme Court case in 1967 deciding that there can be no law against mixed race marriages. The Virginia law had language specifying a person classified as "white" could not marry a person classified as "colored". Does this mean that marriages where neither party was white were legal. Were non wh... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5lttzi/before_loving_v_virginia_how_common_were_non/ | {
"a_id": [
"dbymdt1"
],
"score": [
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"text": [
"I know that the Siamese twins Chang and Eng Bunker had problems when they moved to North Carolina with attempts to classify their race. Eventually, they must have been considered white as they were married to white people and owned slaves. Their ... | [] | [] | [
[]
] | |
pdfyt | How does this gyroscope hand exerciser work? | I have a Dynaflex Gyro Exerciser. This is a wrist and forearm exerciser that claims to be powered by gyroscopes.
Here is a link to the product on Amazon: _URL_0_
How does this thing work? Once you get it going, it does take quite a bit of effort and coordination to keep it spinning. But what is the actual mechanism ... | askscience | http://www.reddit.com/r/askscience/comments/pdfyt/how_does_this_gyroscope_hand_exerciser_work/ | {
"a_id": [
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"text": [
"gyroscopes work by angular momentum, basically it creates a force that keeps the spinning disc inside it straight (or at a constant angle) and it 'forces' it's self back to this position, gyroscope are used to keep some large ship upright in heav... | [] | [
"http://www.amazon.com/Dynaflex-Sports-Gyro-Wrist-Exerciser/dp/B000LPG5US/"
] | [
[]
] | |
mtrez | Could there, theoretically, be particles that don't interact with ANYTHING? If so, in what sense would they 'exist'? | askscience | http://www.reddit.com/r/askscience/comments/mtrez/could_there_theoretically_be_particles_that_dont/ | {
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"text": [
" > If so, in what sense would they 'exist'?\n\nThat's the key question there. If there is something out there, the existence of which won't change _anything_ observable in the w... | [] | [] | [
[],
[],
[],
[]
] | ||
c1p4e1 | Who are the indigenous people of Europe? | I know this answer must vary with geography but is there such a thing?
If I remember my history lesson correctly europes history is littered with people coming from somewhere else and the only people I can think of not coming from outside Europe is the celts (the Basque?) and the Sapmi peoples.
Is european people from... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/c1p4e1/who_are_the_indigenous_people_of_europe/ | {
"a_id": [
"erjau24"
],
"score": [
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"text": [
"Who are the indigenous people of Europe? It depends how far you want to go back.\n\n & #x200B;\n\nIf you go back longer than 40,000 years ago the indigenous people of Europe were Neanderthals who had interbred with Homo Sapiens. About then t... | [] | [] | [
[
"https://www.theguardian.com/science/2018/feb/07/first-modern-britons-dark-black-skin-cheddar-man-dna-analysis-reveals",
"https://www.ancient-origins.net/history/9000-year-old-cheddar-man-has-living-descendant-still-living-same-area-006961"
]
] | |
1kga5h | How powerful a magnet would I need to levitate a drop of water due to it's diamagnetic properties? | askscience | http://www.reddit.com/r/askscience/comments/1kga5h/how_powerful_a_magnet_would_i_need_to_levitate_a/ | {
"a_id": [
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"text": [
"According to Wikipedia,\n\"**A substance that is diamagnetic repels a magnetic field**. All materials have diamagnetic properties, but the effect is very weak, and is usually overcome by the object's paramagnetic or ferromag... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Permeability_of_free_space"
],
[
"http://www.youtube.com/watch?v=EByiuOdnO-A"
]
] | ||
b35yud | Why are there no tides in non ocean connected waters? | Why is it only bodies of water that are connected with the oceans/sea have tides? If it is a uniform lunar gravitational effect upon the earth that creates the tides,why is it only rivers,streams and so forth that are connected to the ocean that are effected? The great lakes are massive bodies of water, but have no ob... | askscience | https://www.reddit.com/r/askscience/comments/b35yud/why_are_there_no_tides_in_non_ocean_connected/ | {
"a_id": [
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"text": [
"The moon does have a tidal effect on all bodies of water, but it's only the oceans that are big enough that we can see it easily. The Great Lakes do have measurable tides, but they're fairly small and not as important of a ... | [] | [] | [
[],
[
"https://www.quantumdiaries.org/2012/06/07/is-the-moon-full-just-ask-the-lhc-operators/"
]
] | |
4oc4jl | How much text do we have from different ancient languages? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4oc4jl/how_much_text_do_we_have_from_different_ancient/ | {
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"text": [
"This is going to be a very difficult question to answer, though I've often, as a Classicist, wondered something similar myself. The only way to really quantify in a way you are wanting would be by \"word count,\" which is itself problematic (Gre... | [] | [] | [
[
"http://www.perseus.tufts.edu/hopper/collection?collection=perseus:collection:greco-roman"
]
] | |
zqqwf | If I were dropped into Jupiter's atmosphere with a spacesuit, would I be pulled in until I reached the core, or would I eventually come into contact with a surface that stops me? | I understand that Jupiter is a gas giant, so is there any surface to speak of within the planet? The wikipedia page says there is a substantial layer of "liquid metallic hydrogen," so would that halt my fall like splashing into the ocean? | askscience | http://www.reddit.com/r/askscience/comments/zqqwf/if_i_were_dropped_into_jupiters_atmosphere_with_a/ | {
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"text": [
"Assuming that your suit is pressurized/rigid, you will eventually reach a point where you're too buoyant to sink any further through the planet since it gets denser and denser as you get closer to the center. We don't really... | [] | [] | [
[],
[]
] | |
a7mw5v | "Hollywood" is so synonymous with the motion picture industry that the word itself has become shorthand for it; how did this come to be the case? How were they able to establish and maintain (for nearly 100 years) such a dominant hold over the industry? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a7mw5v/hollywood_is_so_synonymous_with_the_motion/ | {
"a_id": [
"ec4hgd2"
],
"score": [
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],
"text": [
"A very similar question was answered by /u/Strabbo in [this post](_URL_0_). /u/kirbyderwood also provides an answer lower in the thread explaining the Hollywood - Los Angeles dynamic."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3ky337/how_did_the_us_film_industry_come_to_be_centered/"
]
] | ||
1qpjuw | if trans fats are truly as dangerous as people say, then why is it still legal to put them in food? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1qpjuw/eli5_if_trans_fats_are_truly_as_dangerous_as/ | {
"a_id": [
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"text": [
"not legal anymore...\n\n_URL_0_\n",
"It's quickly become more and more illegal, because trans fats literally stick to the sides of your arteries and slowly block them until you have a heart attack and require a bypass. "... | [] | [] | [
[
"http://www.reuters.com/article/2013/11/11/idUS243461124420131111"
],
[]
] | ||
73i8rm | how does exercise benefit the body so greatly if it increases oxidative stress, the basis for all known disease? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/73i8rm/eli5_how_does_exercise_benefit_the_body_so/ | {
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"text": [
"The oxidative negative effects are negligible compared to the PREVENTION of the negatives of not exercising. Basically, having amazing, \"non-oxidated\" heart arteries arent worth much if they are clogg... | [] | [] | [
[],
[],
[]
] | ||
6c11bk | how do companies sell away so many stocks to public, still totally owned and controlled by the same people, if stock are a form of ownership? | For example, Apple has stock. But if me and a million more people buy Apple stock, the company would still have the same owner and people in charge. So how are the rest of us owners? In most cases we don't even get a cut of the net profit.
This confuses me. What exactly is a stock? What is a share?
I buy 1 stock or s... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6c11bk/eli5_how_do_companies_sell_away_so_many_stocks_to/ | {
"a_id": [
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"text": [
"Stock and shares are the same thing. One share is a fraction of ownership in the company.\n\nApple has approximately 5 billion shares out there, so if you own one share, you get one vote, but practically speaking, that vote ... | [] | [] | [
[],
[]
] | |
27sczr | why jupiter, saturn, uranus and neptune are considered giant planets and not small planets with big atmospheres? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27sczr/eli5_why_jupiter_saturn_uranus_and_neptune_are/ | {
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3,
3
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"text": [
"Even if you ignored their crushing atmospheres as \"just atmosphere\", you rapidly get down into the quasi-liquid, or maybe solid who knows? cores, which are still many times larger than any of the terrestrial planets.\n\nSe... | [] | [] | [
[],
[]
] | ||
1g0a2f | would google fiber's phenomenal download/upload speed be useful for people who don't torrent movies or software like your average redditor? why are cable companies wrong in saying that fiber's speed is unnecessary and overkill? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1g0a2f/eli5_would_google_fibers_phenomenal/ | {
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"text": [
"More speed is desirable because, while we cannot predict exactly *what* customers will be doing with that bandwidth, we can predict that they will want and need it. We all use m... | [] | [] | [
[],
[],
[],
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fw509 | What does science have to say about Free will Vs Determinism? | askscience | http://www.reddit.com/r/askscience/comments/fw509/what_does_science_have_to_say_about_free_will_vs/ | {
"a_id": [
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"text": [
"It doesn't say much about free will, but determinism is pretty much out.\n\nAt least, on the quantum level, there's no such thing as determinism.",
"*disclaimer* This is all personal philosophy mind... | [] | [] | [
[],
[],
[]
] | ||
23d7rk | why did video games require memory cards when past games used to be able to save within the game itself? | **Example:** The Legend of Zelda and literally all Nintendo 64 games | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23d7rk/eli5_why_did_video_games_require_memory_cards/ | {
"a_id": [
"cgvttkf",
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"score": [
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"text": [
"When games where on cartridges they had a memory card built in. When they moved to CD's and later DVD's they required external memory because it'd be bad to be constantly writing and erasing data on the... | [] | [] | [
[],
[],
[]
] | |
lxkh9 | Would it be possible for a human being to actually walk on water? [Please, bear with me] | During a discussion about magicians last night, someone made the argument that they feel that if a human being can float on water whilst on their back without any aides, it might be possible for a human being to train themselves to 'float walk' on water.
Instinctively, I said this wasn't possible but the idea behind i... | askscience | http://www.reddit.com/r/askscience/comments/lxkh9/would_it_be_possible_for_a_human_being_to/ | {
"a_id": [
"c2wdydb",
"c2wdz8q",
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"c2wdydb",
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"c2wfrn0"
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"score": [
2,
3,
2,
3,
2,
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2,
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"text": [
"This is the trick that [kick-started the conversation](_URL_0_).\n\n",
"Only if it's fro... | [] | [] | [
[
"http://www.youtube.com/watch?v=kne6YnjcruQ&feature=related"
],
[],
[],
[],
[
"http://www.youtube.com/watch?v=kne6YnjcruQ&feature=related"
],
[],
[],
[]
] | |
5a9k99 | why is hayfever so massively common compared to other allergies? | If this isn't actually true and it's just confirmation bias, let me know. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5a9k99/eli5_why_is_hayfever_so_massively_common_compared/ | {
"a_id": [
"d9eqr42",
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"score": [
2,
3
],
"text": [
"Hayfever is not a specific allergy. It is a broad category applied to all allergies to airborne pollen regardless of what plant is producing it. It is so massively common because there are so many different species of plants... | [] | [] | [
[],
[]
] | |
6amhqe | memory leaking | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6amhqe/eli5_memory_leaking/ | {
"a_id": [
"dhfohrv"
],
"score": [
8
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"text": [
"\"Leaking\" is a metaphor. It actually refers to a situation where a program tells the computer \"I need to use some memory\" and then forgets to say \"I'm done using that memory.\" Over time, the computer allocates more and more of its memory to... | [] | [] | [
[]
] | ||
efd771 | If I drink a pint of water, how much of it is absorbed into my body becoming part of my organs and blood versus being excreted as urine or sweat? | askscience | https://www.reddit.com/r/askscience/comments/efd771/if_i_drink_a_pint_of_water_how_much_of_it_is/ | {
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2,
2,
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2
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"text": [
"A bit hard to know how to answer this, because the body doesn't consume water - it creates it. Burning sugars to power the body results in carbon dioxide and ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
1vf0ze | difference between 2-stroke and 4-stroke motorcycles (specifically dirt bikes) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vf0ze/eli5difference_between_2stroke_and_4stroke/ | {
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"cerlphp",
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],
"text": [
"[2 strokes](_URL_1_) have a power stroke every rotation. [4 strokes](_URL_0_) have a power stroke every second rotation.\n\nMost 2 strokes use ports that ar... | [] | [] | [
[
"http://www.zoopedup.com/blogs/uploads/Piston0.gif",
"http://elearning.vtu.ac.in/P7/enotes/AU51/Animated%20Engines%20Two%20Stroke%20Cycle_files/twostroke.gif"
],
[],
[],
[],
[]
] | ||
97pgqh | if you feed a cow with its own milk, will that cow be able to live out its life with no additional food source? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/97pgqh/eli5if_you_feed_a_cow_with_its_own_milk_will_that/ | {
"a_id": [
"e49zywd",
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],
"score": [
2,
2
],
"text": [
"Like, feeding the cow milk taken from that same exact cow? That won't work because cows don't turn 100% of their food into milk. Some of it is lost.\n\nBut just feeding cows with cow milk - sure. Milk has all the nutrients n... | [] | [] | [
[],
[]
] | |
6nqlr2 | what black light is and how it works to highlight many fluids and make certain colors glow | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6nqlr2/eli5_what_black_light_is_and_how_it_works_to/ | {
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"dkbi05x",
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"score": [
15,
8,
4,
3
],
"text": [
"Black light is ultraviolet light. Ultravolet means it is a wavelength too short for the eyes to see. However, some chemical compound can absorb certain wavelenghts, and emit light... | [] | [] | [
[],
[],
[],
[]
] | ||
flpss | How can there be "a" human genome? [continued] | How can current genetic science distinguish what is part of "the" "baseline" human genome and what is an individual trait? Is there even such a thing as a "baseline" genome, or, does it even make sense to ask this question?
As far as current genetic science goes (I'm pretty much a noob in that field but..) I assume th... | askscience | http://www.reddit.com/r/askscience/comments/flpss/how_can_there_be_a_human_genome_continued/ | {
"a_id": [
"c1guuo6",
"c1gvexo"
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"score": [
6,
4
],
"text": [
"Humans are about 99.9% genetically homogenous as determined by studies where groups of people were compared for differences individual base pairs, know as single nucleotide polymorphisms.\n\nA gene codes for a trait like hai... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Reference_genome"
]
] | |
2vhg8w | why do halogen headlights look white at some angles but blue at others? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vhg8w/eli5_why_do_halogen_headlights_look_white_at_some/ | {
"a_id": [
"cohoeo2"
],
"score": [
2
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"text": [
"HIDs, which I think you're talking about, AKA Xenon, is an electric arc.\n\nThey're often used behind a projector lens, which gives a sharp cutoff of the beam, to prevent glare. At the edge of this cutoff, is a [varied color area](_URL_0_) \n\nWh... | [] | [] | [
[
"http://blog.onexhid.com/wp-content/uploads/2011/01/onex-hid-cutoff-line-step-1.jpg"
]
] | ||
my5a2 | how radiation stays inside the nuclear plants but radiation can go through almost anything? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/my5a2/eli5_how_radiation_stays_inside_the_nuclear/ | {
"a_id": [
"c34sdj1",
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"score": [
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6
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"text": [
"Well, there are different types of radiation, and they all have different properties, but I'm going to give you a general answer.\n\nThere are specific materials that have a high tendency to interact with the radiation comin... | [] | [] | [
[],
[]
] | ||
28qshq | Why does my sweat crystallize into salt when I sweat during exercise? | Whenever I run I get covered in salt crystals. I'm interested to know why this happens. | askscience | http://www.reddit.com/r/askscience/comments/28qshq/why_does_my_sweat_crystallize_into_salt_when_i/ | {
"a_id": [
"cidkese"
],
"score": [
8
],
"text": [
"Your [sweat is salty](_URL_2_). The water evaporates and the salt precipitates out, depositing on you. Some people resorb more than others. This is the basis for the [sweat test](_URL_1_) for [cystic fibrosis](_URL_0_). Don't worry, just because ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Cystic_fibrosis",
"https://en.wikipedia.org/wiki/Sweat_test",
"https://en.wikipedia.org/wiki/Eccrine_gland"
]
] | |
3oiqi4 | What was the Roman tax system like? | I tried to research this on my own but got kind of confused. My big question is did it involve any form of income tax at all? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3oiqi4/what_was_the_roman_tax_system_like/ | {
"a_id": [
"cvxws0h",
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"score": [
42,
6,
13
],
"text": [
"usually tax rate would be between 1-3% on your wealth, but higher in wartime. sometimes there would be an income tax in Urban areas.\n\nin Rural areas where organised tax collection was either impossi... | [] | [] | [
[
"http://www.unrv.com/economy/roman-taxes.php",
"http://www.jstor.org/stable/299558"
],
[],
[]
] | |
dnavrr | what does a "reset signal" to a cpu do? (computer science) | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dnavrr/eli5_what_does_a_reset_signal_to_a_cpu_do/ | {
"a_id": [
"f59b8uf"
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"score": [
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"text": [
"Well that's depends on what it's designed to do and what architecture. There's a really good book (_URL_0_) that goes through what happens when a computer boots up, this article explains in brief depth.\n\n_URL_1_\n\nThe ELI5 version is that ther... | [] | [] | [
[
"https://github.com/cfenollosa/os-tutorial",
"https://0xax.gitbooks.io/linux-insides/Booting/linux-bootstrap-1.html"
]
] | |
51wuuw | what causes sponges to be as absorbent as they are compared to others? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/51wuuw/eli5_what_causes_sponges_to_be_as_absorbent_as/ | {
"a_id": [
"d7fis49",
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"score": [
2,
2
],
"text": [
"Assuming by 'others' you mean other materials, it's because they are full of tiny holes and chambers. Liquid is drawn into the chambers by capillary action.",
"Water sticks to materials that are hydrophilic. You'll notic... | [] | [] | [
[],
[]
] | ||
2l0doc | Is it possible for a falling object's terminal velocity in a given atmosphere to exceed the speed of sound within that atmosphere? | It's my understanding that, as the fluid the object is falling through increases in density, the terminal velocity of the object will decrease while the speed of sound through that fluid increases, and vice versa as the fluid decreases in density. Is there a set of conditions under which the object's terminal velocity... | askscience | http://www.reddit.com/r/askscience/comments/2l0doc/is_it_possible_for_a_falling_objects_terminal/ | {
"a_id": [
"clqbjmi",
"clqcj1d"
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"score": [
15,
2
],
"text": [
"Sure. [This guy](_URL_1_) broke the speed of sound in freefall about a week ago. All you need is a large, non-lifting, not too draggy body.\n\nFYI, speed of sound for air at the conditions found anywhere in the atmosphere i... | [] | [] | [
[
"https://www.google.com/search?num=100&client=firefox-a&hs=V03&rls=org.mozilla%3Aen-US%3Aofficial&channel=sb&q=8000kg%2Fm^3+*+%284%2F3%29*pi*%281m%29^3&oq=8000kg%2Fm^3+*+%284%2F3%29*pi*%281m%29^3&gs_l=serp.3..30i10.4548.24821.0.25883.29.29.0.0.0.0.143.2455.25j4.29.0.ecynfh...0...1.... | |
236k29 | Has there ever been a movement to 'unite' the various Caribbean countries like Antigua and Barbuda, or Trinidad and Tobago? | Seems like a logical course of action | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/236k29/has_there_ever_been_a_movement_to_unite_the/ | {
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"cgu91fk",
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"score": [
3,
2,
2,
3
],
"text": [
"Are you asking why Islands of the Lesser Antilles haven't all banded together in a political union? Because I have no idea about that, sorry :/\n\nBut the way I read it, it looks l... | [] | [] | [
[
"http://en.m.wikipedia.org/wiki/Antigua_and_Barbuda",
"http://en.m.wikipedia.org/wiki/Trinidad_and_Tobago"
],
[],
[
"http://en.wikipedia.org/wiki/West_Indies_Federation",
"http://en.wikipedia.org/wiki/CARICOM_Single_Market_and_Economy",
"http://en.wikipedia.org/wiki/Caribbean_Community",... | |
2r001m | Why does the U.S. have so many aircraft carriers in comparison to the world? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2r001m/why_does_the_us_have_so_many_aircraft_carriers_in/ | {
"a_id": [
"cnb5vsz"
],
"score": [
2
],
"text": [
"Hello, as you've stated the question, it essentially is violating our 20 Year Rule. You would have better luck with /r/CredibleDefense. But if you are looking for a more general answer about the development of US carrier policy through the Cold W... | [] | [] | [
[]
] | ||
i8te1 | Does mold automatically indicate spoilage? | i have a block of cheddar cheese in my fridge with the stereotypical green spots of mold on it. theoretically can't i just cut off the surface and still have a perfectly good block of cheese? same with bread. can't i just tear off the molded bits and have otherwise perfectly 'sanitary' bread to eat? if so where does th... | askscience | http://www.reddit.com/r/askscience/comments/i8te1/does_mold_automatically_indicate_spoilage/ | {
"a_id": [
"c21t6ua",
"c21u9u3"
],
"score": [
5,
5
],
"text": [
"Mold *is* (one form of) spoilage. Visible mold in one place usually indicates non-visible trace amounts threaded through the food nearby. Cutting out only the visible bits will leaves these traces, and you don't know how m... | [] | [] | [
[],
[]
] | |
fdgmlj | what causes tornadoes to form and why are they so often along the same historical paths? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fdgmlj/eli5_what_causes_tornadoes_to_form_and_why_are/ | {
"a_id": [
"fjhaena",
"fjhchkh"
],
"score": [
5,
3
],
"text": [
"When warm, moist air mixes with cold air. When they meet the work around each other creating the cyclone. Most tornadoes form during thunderstorms, but that is not a requirement for there to be one. \n\nSame paths have to do... | [] | [] | [
[],
[]
] | ||
31w5c6 | Why did the Beer Hall Putsch fail despite the Nazis superior numbers? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/31w5c6/why_did_the_beer_hall_putsch_fail_despite_the/ | {
"a_id": [
"cq5liou"
],
"score": [
6
],
"text": [
"Hitler and the Nazis made a few key mistakes in their handling of the Putsch that led to it being easily defeated (Hitler wouldn't have succeeded in installing himself as leader of Germany even if the initial Putsch had succeeded, but more on tha... | [] | [] | [
[]
] | ||
yj2oa | Were past cultures attracted to fatter women? | I'm reading the Beauty Myth by Naomi Wolf and in it she claims that modern society has fetishized being underweight. When I read that, I thought back to classical depictions of women and realized that I did think they all looked plump. So was the "ideal" women larger in the past? Or did each culture have its own partic... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/yj2oa/were_past_cultures_attracted_to_fatter_women/ | {
"a_id": [
"c5w1s6x",
"c5w319r",
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"c5w5e2z",
"c5wa6mh",
"c5wf4lz"
],
"score": [
32,
3,
11,
10,
2,
5,
3
],
"text": [
"Each culture had an ideal body weight.\n\nIn Renaissance & Romantic Era paintings, you'll notice the women ar... | [] | [] | [
[],
[],
[
"http://www.dl.ket.org/humanities/gallery/images/roman_wall_.jpg",
"http://admissions.gallaudet.edu/bloggers/robyn/archives/IMG_0350.JPG",
"http://1.bp.blogspot.com/-gPlIIqfMqAE/TXUpkF1l8GI/AAAAAAAAFwo/7y3sGeIkTA4/s1600/10.jpg",
"http://jssgallery.org/Other_Artists/Roman/pompei3graces.... | |
1jys7q | what are exactly elementary particles? | Rather: Can you explain everything around and about the elementary particles in not too technical terms? Wikipedia is not the best place to learn about our yet smallest found particles. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jys7q/eli5_what_are_exactly_elementary_particles/ | {
"a_id": [
"cbjliff"
],
"score": [
6
],
"text": [
"Elementary particles are, simply put, particles that make up, and regulate the behaviour of, all of the matter around us. That is to say that they are discrete particles that cannot be broken down into other parts or particles. These include the ... | [] | [] | [
[]
] | |
2gndho | How was Mark Antony's relationship with Cleopatra viewed by the roman and egyptian general public? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2gndho/how_was_mark_antonys_relationship_with_cleopatra/ | {
"a_id": [
"ckkxc4u"
],
"score": [
16
],
"text": [
"Terribly, at least by Romans--we don't really know what the Egyptians thought (and it's also difficult to figure out what the different social elements within Egyptian society would've thought). But we know that the Romans despised Antony's rela... | [] | [] | [
[]
] | ||
1oj2hn | what do the letter classifications (kroq, wfan, kmox etc.) for radio stations mean and/or how are they assigned? | It is something I have always wondered about. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1oj2hn/eli5_what_do_the_letter_classifications_kroq_wfan/ | {
"a_id": [
"ccsejv1"
],
"score": [
4
],
"text": [
"K and W denote the assignment area, general east (w) and west (k) of the Mississippi, the other 3 letters are either requested by the registering party or randomly by the FCC."
]
} | [] | [] | [
[]
] | |
2b79ew | why does everyone in the us seem to have an ac system? | Even in areas with very mild climates? I know, weird question but I'm not from the US. I travel a lot and I've been to the US a few times. It seems to be the only country where at least 9 out of 10 people have an AC system, even in small cheap apartments in mild climate states. Most places only have them in like big su... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2b79ew/eli5_why_does_everyone_in_the_us_seem_to_have_an/ | {
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"cj2hahw",
"cj2hcs7",
"cj2hfrk",
"cj2hgns",
"cj2hh2b",
"cj2hjf0",
"cj2hku6",
"cj2hmyw",
"cj2hnis",
"cj2hnm8",
"cj2hqoz",
"c... | [] | [
"http://www.reddit.com/r/explainlikeimfive/comments/2b79ew/eli5_why_does_everyone_in_the_us_seem_to_have_an/cj2tn4l"
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[]... | |
2bz25c | What percent of our dinosaur fossils come from the Cretaceous–Paleogene extinction event? | I was wondering if the Cretaceous–Paleogene extinction event killed so many dinosaurs that it has led to a disproportionate amount of fossils being from that time, or if the extinction event was so severe that very few of the fossils are from that time. I understand that it isn't just a dinosaur dieing that creates a ... | askscience | http://www.reddit.com/r/askscience/comments/2bz25c/what_percent_of_our_dinosaur_fossils_come_from/ | {
"a_id": [
"cjaqfoz"
],
"score": [
4
],
"text": [
" > What percent of our dinosaur fossils come from the Cretaceous–Paleogene extinction event?\n\nFrom the event itself? I don't think that I've ever heard of even one fossil being identified as being from the event itself. "
]
} | [] | [] | [
[]
] | |
193ixo | Question about the movie Kingdom of Heaven | I know the movie is full of historical inaccuracy, but there's one scene in particular I don't understand. After Reynald kills Saladin's sister, the messengers come to Jerusalem, and Guy kills him. After that, the various factions in the court point there spears at each other. There are Templars, Hospitallers, and the ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/193ixo/question_about_the_movie_kingdom_of_heaven/ | {
"a_id": [
"c8khhm3"
],
"score": [
24
],
"text": [
"While these organizations may have been nominally part of the same court within the kingdom of Jerusalem they all had their own objectives and motivations, which often put these groups at odds with one another.\n\nFor example shortly before the ... | [] | [] | [
[]
] | |
3d8633 | during a commercial break, what happens to live-audience shows that are not broadcast live? | Do the hosts just jump into the next segment after a few seconds of clapping from the last segment?
Or does the audience actually wait around a little for the start of the next part?
| explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3d8633/eli5during_a_commercial_break_what_happens_to/ | {
"a_id": [
"ct2ojfa"
],
"score": [
2
],
"text": [
"It's called an intermission. They go for a break to get drinks or food or stuff like that. "
]
} | [] | [] | [
[]
] | |
3w6097 | odor eliminators | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3w6097/eli5_odor_eliminators/ | {
"a_id": [
"cxto8ig"
],
"score": [
2
],
"text": [
"It is kind of like bubbles. You are spraying a kind of chemical which is ring shaped and it traps the odor chemicals inside that ring which stops the odor. This happens at the molecular level. \n\n_URL_0_"
]
} | [] | [] | [
[
"https://en.wikipedia.org/wiki/Febreze#Ingredients"
]
] | ||
4229s5 | the procedures taken if mid surgery there is an emergency (active shooter, tornado, fire) | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4229s5/eli5the_procedures_taken_if_mid_surgery_there_is/ | {
"a_id": [
"cz725vk"
],
"score": [
3
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"text": [
"It depends, each hospital is different... it wouldn't really affect anything.\n\nActive shooter, you remain in place, stay away from windows. Based on how OR rooms are situated, it's never off a hallway... there's prep rooms, etc. Only certain pe... | [] | [] | [
[]
] | |
h7jm7 | When it's stated that "In the year [XXXX], the average lifespan was only [XX] years," is this figure very skewed by infant/child mortality? | i.e., if you cut out young deaths, were many people living to what we would consider old age, or was this very unusual? | askscience | http://www.reddit.com/r/askscience/comments/h7jm7/when_its_stated_that_in_the_year_xxxx_the_average/ | {
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"Once you cut out infant and childhood mortality figures, people were living what we'd consider to be normal lives, if slightly shorter. \n\nLancaster's *Expectations of Life* took data from nobility (because it's what we ha... | [] | [] | [
[],
[]
] | |
7vdouf | Why does Kosovo have so many more people than Montenegro? | When you look at Kosovo and Montenegro on a map, they seem really similar in size (Montenegro is actually a bit larger, at 14,000 km2 to Kosovo's 11,000 km2). Yet Kosovo has about three times as many people (1.8 million compared to 600,000). Kosovo is almost as populous as neighbouring Macedonia, which is much larger i... | askscience | https://www.reddit.com/r/askscience/comments/7vdouf/why_does_kosovo_have_so_many_more_people_than/ | {
"a_id": [
"dtrk9hf"
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"text": [
"Having been to both I would say that Kosovo has larger urban centres and much more agricultural land available. Standing by themselves the geography of Kosovo is more conducive to a larger agrarian and urban population than Montenegro who's land... | [] | [] | [
[]
] | |
b58x6c | Did Roman legionaries' families receive compensation if they died in battle? | I've been reading about Caesar and how he managed to keep his legions fighting even after they'd technically completed their service, where they would have got their 3,000 denarii and a piece of farmland. He did so with a promise of more gold at the end.
And it got me thinking - it would be an absolute pain, and unfai... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/b58x6c/did_roman_legionaries_families_receive/ | {
"a_id": [
"ejc4y3n"
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"score": [
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"text": [
"There are a few previous question you can cobble together to answer most of this. Someone may come in and give you a comprehensive answer, but in the meantime...\n\n[How did the wives of roman soldiers learn of their husbands deaths?](_URL_0_) i... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/1riwc2/how_did_the_wives_of_roman_soldiers_learn_of/",
"https://www.reddit.com/r/AskHistorians/comments/3rmm9j/roman_legionaries_enlisted_for_a_service_of_25/",
"https://www.reddit.com/r/AskHistorians/comments/363rhp/i_have_just_joined_the_roman_army_wh... | |
27dbv0 | how does the brain decide what is funny and what is not? | For some people, everything is hilarious, even things that morally or ethically shouldn't be. For others, their humor is lighter.
Is it their experiences that dictate what is funny and what is not? Are the people who enjoy darker humor different in any way than those who do not?
ALSO: What exactly is laughter, anyway... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27dbv0/eli5_how_does_the_brain_decide_what_is_funny_and/ | {
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"text": [
"Humour is a tough one to nail down. Generally the funniest jokes are the ones where people end up looking like assholes or idiots. Laughter is suspected to be an aggressive reaction to things, as other... | [] | [] | [
[],
[],
[]
] | |
kj7om | How did pouch evolve on marsupials? | Edit: And by "how" I mean "how", not "why" (yes it's for babies, everybody knows that :D). How did it evolve? What/how did it used to be before they have pouch like the one they have in present time? I tried Googling but all of the results appear to be creationism sites. Help! | askscience | http://www.reddit.com/r/askscience/comments/kj7om/how_did_pouch_evolve_on_marsupials/ | {
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"I don't know the answer, but I have been led to believe that placental mammals evolved fro... | [] | [] | [
[],
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96iybk | what is that clicking sound that nuclear radiation detectors make? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/96iybk/eli5_what_is_that_clicking_sound_that_nuclear/ | {
"a_id": [
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"text": [
"The noise is because of how [Geiger Counters](_URL_0_) function.\n\nThe Geiger counter has a chamber filled with an inert gas, like helium, and a high voltage applied to it. If high energy radiation hits the helium gas, it... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Geiger_counter"
],
[]
] | ||
3tyev6 | Could quantum entanglement be used for communication if the two ends were synchronized? | Say both sides had synchronized atomic clocks and arrays of entangled particles that represent single use binary bits. Each side knows which arrays are for receiving vs sending and what time the other side is sending a particular array so that they don't check the message until after it's sent. They could have lots of ... | askscience | https://www.reddit.com/r/askscience/comments/3tyev6/could_quantum_entanglement_be_used_for/ | {
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"score": [
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12,
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"text": [
"One of the absolute truths about quantum entanglement is that it can't be used for communication. If you ever... | [] | [] | [
[],
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"https://en.m.wikipedia.org/wiki/Quantum_dense_coding"
],
[],
[],
[],
[],
[
"https://www.youtube.com/watch?v=YycAzdtUIko"
]
] | |
14mg7n | When and why did nations start "declaring war"? | When did war declarations become commonplace? Do countries still declare war? Why did countries start declaring war in first place, if it gives your enemy time to prepare? Is/was it regulated somehow? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/14mg7n/when_and_why_did_nations_start_declaring_war/ | {
"a_id": [
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"text": [
"The official international protocol for declaring war was defined in the Hague Convention of 1907 on the Opening of Hostilities.",
"Prior to the above, the 1648 treaty of Westphalia brought a much a... | [] | [] | [
[],
[],
[]
] | |
2ekz6j | how do tires on the landing gears of heavy airplanes withstand the speed and weight of the airplane when landing? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ekz6j/eli5how_do_tires_on_the_landing_gears_of_heavy/ | {
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"text": [
"They're big tires, so the force is spread out over a larger area, and they use quite a few tires—a Boeing 747 has 18 tires on it—further distributing the load. \n\nThey use thick rubber, so they're stronger than your average... | [] | [] | [
[
"http://www.reddit.com/r/askscience/comments/1u8m3g/how_quickly_to_airline_jumbo_jet_tires_wear_out/cefmk0d"
],
[]
] | ||
rz5ip | Healthier: high caloric intake + exercise, vs lower caloric intake | askscience | http://www.reddit.com/r/askscience/comments/rz5ip/healthier_high_caloric_intake_exercise_vs_lower/ | {
"a_id": [
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"score": [
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"text": [
"Caloric intake isn't specific enough. High saturated fat intake? High cholesterol intake? High carb intake?\nYou got my point. "
]
} | [] | [] | [
[]
] | ||
1z5mhx | Do runaway stars get shot out of the Galaxy? | These things are flying through the Milky Way at up to 10 times the velocity of most stars' orbits:
[A Monster Star Plows Through the Galaxy? Shocking.](_URL_0_)
[A Corkscrew Unwinds From a Galactic Cannonball](_URL_1_)
So, do they end up cruising intergalactic space, or in parabolic trajectories into the outer halo... | askscience | http://www.reddit.com/r/askscience/comments/1z5mhx/do_runaway_stars_get_shot_out_of_the_galaxy/ | {
"a_id": [
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"text": [
"It takes a lot of time and energy for matter to be ejected completely out of the Galaxy. Most runaway stars that are flung around thanks to close interactions with other objects remain close to the galaxy, but the probability of this actually oc... | [] | [
"http://www.slate.com/blogs/bad_astronomy/2014/02/27/kappa_cas_runaway_star_plows_a_bow_shock_in_the_sky.html",
"http://www.slate.com/blogs/bad_astronomy/2014/02/19/neutron_star_jet_an_exploded_star_creates_a_truly_bizzare_scene.html"
] | [
[]
] | |
2isa3d | what would happen if the richest people on earth asked their banks to pay them out their fortune in cash? | Lets say the 5000 Richest People on earth all call their banks, telling them they want all their money in cash as soon as possible. Is there even enough money in cash stored at banks for them to pay out?
Or lets make the scale smaller, say Bill Gates calls his bank and tells them he wants 20 billion in cash as soon as... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2isa3d/eli5_what_would_happen_if_the_richest_people_on/ | {
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"score": [
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"text": [
"Bill Gate's bank would tell him to shove off, since he doesn't have $20 billion in cash. He probably has tens of millions in cash, so the bank would probably just ask him to wait a couple weeks so they ... | [] | [] | [
[],
[],
[]
] | |
2uzwby | why do couples that are having trouble getting pregnant want a biological child so much when there are many children in need of adoption? | I have watched a few people spend years dealing with In Vitro fertilization and going through emotional turmoil when the process doesn't work and they have to start over again.
My question is: If they really just want to have a child and family, why do they not adopt? Is there some other driving factor making them ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2uzwby/eli5_why_do_couples_that_are_having_trouble/ | {
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"score": [
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"text": [
"Not a parent are you? The feeling you get from the birth of a child that YOU helped make is beyond words.",
"It is the innate human drive to carry on the individuals own geneti... | [] | [] | [
[],
[],
[],
[]
] | |
wu7b9 | bullet penetration | This video _URL_0_ was on the front page today. Why do the watermelons explode like that? Why doesn't the bullet just leave a clean hole behind? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/wu7b9/eli5_bullet_penetration/ | {
"a_id": [
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"There are different kinds of bullets. Some bullets (called [full metal jacket bullets](_URL_0_)) are surrounded in a hard metal like steel and have rounded or pointed tips. They usually leave a clean hole.\n\nOther bullets, ... | [] | [
"http://www.youtube.com/watch?v=O1d7i3i0LLI"
] | [
[
"http://en.wikipedia.org/wiki/Full_metal_jacket_bullet",
"http://en.wikipedia.org/wiki/JHP"
],
[]
] | |
1bn3ow | why do songs become popular on the radio months after they were released? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1bn3ow/eli5_why_do_songs_become_popular_on_the_radio/ | {
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"text": [
"There are a few reasons:\n\n1) The song was not expected to be popular. The album comes out and after a little while the internet discovers how cool track 7 is - marketing people pick up on it and jam it on the radio to sell more albums.\n\n2) I... | [] | [] | [
[]
] | ||
258ty3 | proton cancer treatment | I have a family member who has cancer in multiple locations (Brain and lungs so far) - recently diagnosed.
They are suggesting Proton Therapy and I looked it up, but I don't really understand. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/258ty3/eli5_proton_cancer_treatment/ | {
"a_id": [
"cheu7cy"
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"text": [
"It's very simple once you understand some basic biological concepts.\n\nCancer is the uncontrolled growth and reproduction of cells.\n\nCells require DNA to reproduce themselves and when DNA is damaged tremendously cell reproduction will usually ... | [] | [] | [
[]
] | |
4fhdwc | why are so many countries aiming for 2% inflation? | Why is it good for things to get more expensive, why is there no parallel or greater wage growth target, and what makes 2% the gold standard?
Edit: thanks guys for covering this, much appreciated. I'd mark it explained but I'm new to this and don't know how | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4fhdwc/eli5_why_are_so_many_countries_aiming_for_2/ | {
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"text": [
"Inflation is a side effect of growth. As more people have more money, they can demand more goods/services which cause prices to rise since demand (generally) outstrips supply over... | [] | [] | [
[],
[],
[],
[]
] | |
3da95g | Treaty of Versailles--Trying to recall where I read a discussion on the severity of the treaty. Was the treaty too lenient? | Within the last six months I was reading a thread *somewhere* on reddit about historical misconceptions. There was an incredibly compelling comment about the Treaty of Versailles, talking about France's posturing post Franco-Prussian war and how much of the "reparations" were a political facade (which I've read several... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3da95g/treaty_of_versaillestrying_to_recall_where_i_read/ | {
"a_id": [
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"text": [
" > Was the Treaty of Versailles justified in the form it took?\n\nExpecting the Germans to pay reparations for the Damages they had done; reducing their military (in theory) to ensure that they could not seriously threaten the borders of their ... | [] | [] | [
[]
] | |
196m5i | Are suicide fighters a modern development? If not, how long have they been around and where/what regime? | EDIT: Answered!! | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/196m5i/are_suicide_fighters_a_modern_development_if_not/ | {
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"text": [
"Suicide tactics are not a modern concept but it really comes down to your definition of suicide fighters. Soldiers have, at times, committed to attacks in which they would have kn... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Liberation_Tigers_of_Tamil_Eelam#Suicide_bombings",
"http://en.wikipedia.org/wiki/Liberation_Tigers_of_Tamil_Eelam",
"http://en.wikipedia.org/wiki/International_Institute_for_Strategic_Studies"
],
[
"http://en.wikipedia.org/wiki/Gaius_Mucius_Scaevola",
"... | |
56ug4s | how does new information still get uncovered from classified state archives after decades of research and analysis? | For example, new information that emerges from the archives of the USSR and the KGB. I have no clear example right now though.
Or, something that happens in my country, new information on Ceaușescu / the Romanian communist regime.
Former communist archives have been studied since the '90s, how come there is still new i... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/56ug4s/eli5_how_does_new_information_still_get_uncovered/ | {
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"text": [
"There are several reasons. \n\n1. First and most obvious, it's **a huge amount** of information to go through. The people digging through it all are usually academic researchers looking for some specific thing for their research. Nobody is just ... | [] | [] | [
[]
] | |
5spy9s | Did Japanese-Americans have any warning that FDR was going to intern them during WWII? How did so many of them lose their savings and their houses? | I'm asking whether Japanese-Americans had any warning that internment was about to happen. Did they have time to prepare for a long internment, or was it a surprise?
I've read that many interned Japanese-Americans ended up losing their savings and their property. How did this occur?
Did the US government freeze all a... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5spy9s/did_japaneseamericans_have_any_warning_that_fdr/ | {
"a_id": [
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"score": [
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"text": [
"Expanded from [an earlier answer of mine](_URL_0_)\n\nIn terms of notice, FDR signed Executive Order 9066 in 19 February 1942 which authorized exclusion of enemy aliens in what were termed \"Military Areas\", on 2 March Lieutenant General John L... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/5ds2po/what_propertyfinancial_loss_did_japaneseamericans/"
]
] | |
sujnb | Why can we NOT drink seawater to survive? | I know we can drink small amounts of seawater but why is it we cannot drink it to survive. We require trace metals, minerals, ions etc. that can be readily found in seawater and yet when we drink it we instinctively spit it out and feel a stomachache afterwards. We also cannot survive solely on DI water, since it has... | askscience | http://www.reddit.com/r/askscience/comments/sujnb/why_can_we_not_drink_seawater_to_survive/ | {
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"text": [
"The problem with seawater is not trace minerals and metals, but rather the > 3% salt content. Your body needs to maintain a certain percentage of electrolytes, and doesn't have a good way to absorb onl... | [] | [] | [
[],
[
"http://globetrooper.com/notes/why-cant-we-drink-sea-salt-water/"
],
[]
] | |
hgnqz | Mass of falling objects | Two spheres of the same size are placed held in position above the moon, to remove air resistance. One sphere has 5 times the mass of the other. In all practical ways they would fall at the same rate. But would the additional mass of the one sphere increase the gravitational field it creates there by increasing is acce... | askscience | http://www.reddit.com/r/askscience/comments/hgnqz/mass_of_falling_objects/ | {
"a_id": [
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"score": [
9
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"text": [
"Yes, technically speaking, the more massive ball does cause the moon to accelerate towards the ball faster, which means that it hits the moon quicker.\n\nHowever, this effect is so laughably small that's it's completely unmeasurable."
]
} | [] | [] | [
[]
] | |
26av3a | I recently learned that scientiists use zircon crystals to date rocks and, with them, the Earth. How do we know that the zircons weren't created elsewhere in material that then combined to form the Earth? | Here's a link to one example: _URL_0_ | askscience | http://www.reddit.com/r/askscience/comments/26av3a/i_recently_learned_that_scientiists_use_zircon/ | {
"a_id": [
"chpd6cs"
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"text": [
"Well - sometimes they are, and in some instances that fact is the main story the rock can tell. All Zircon-based geochronology studies must begin with a morphological assessment of the material: how many populations are there, do they look fresh,... | [] | [
"http://www.csmonitor.com/Science/2014/0224/What-can-a-4.4-billion-year-old-bit-of-Earth-s-crust-tell-us-about-the-origins-of-life"
] | [
[
"http://gemoc.mq.edu.au/Annualreport/annrep2003/Webphotos/page37b.jpg",
"http://ppegeo.igc.usp.br/img/revistas/guspsc/v8n1/05f8.jpg"
]
] | |
3bv9hu | How does the universe decide where an electron is when you observe it? | Hi!
So I remembered this Futurama scene where the professor is betting on a horse or something and there were two horses who were neck and neck. In order to see who won the race the people at the racecourse use a microscope to observe where the electrons were when they crossed the finishing line and hence find who won... | askscience | http://www.reddit.com/r/askscience/comments/3bv9hu/how_does_the_universe_decide_where_an_electron_is/ | {
"a_id": [
"cspym1g"
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"text": [
"It is different for cards. The cards are predetermined, we just don't know where they are. The electrons are everywhere and nowhere until measured.\n\nThe truth is, we don't know how some electrons get measured over here and some get measured ov... | [] | [
"http://imgur.com/z1DWvNj"
] | [
[
"https://www.youtube.com/watch?v=ZuvK-od647c",
"https://en.wikipedia.org/wiki/Bell's_theorem"
]
] | |
2g4023 | Say I had a beaker of water at room temperature and threw in one salt molecule (NaCl). The Salt would separate into Na and Cl ions. What if I was able to separate the water containing the Na ion from the water containing the Cl ion and evaporated them, what would happen to the ions? | Would they still exist in an ionic state? | askscience | http://www.reddit.com/r/askscience/comments/2g4023/say_i_had_a_beaker_of_water_at_room_temperature/ | {
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"First, salts such as NaCl are not molecul... | [] | [] | [
[],
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[
"http://en.wikipedia.org/wiki/Aqueous_solution",
"http://en.wikipedia.org/wiki/Mass_spectrometry"
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[],
[],
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60zqbv | why do employers ask you to resign instead of just firing you? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/60zqbv/eli5_why_do_employers_ask_you_to_resign_instead/ | {
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23,
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"Depends on the place. A lot of places do it so you can't later sue for wrongful termination. Others still do it ... | [] | [] | [
[],
[],
[],
[],
[
"https://www.finra.org/sites/default/files/AppSupportDoc/p015111.pdf"
],
[],
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ma4fs | What accounts for the French paradox? (Why are French people not as fat as we'd expect, given their diet) | The fact that they eat so many carbohydrates from baked goods like baguettes (with saturated fat from cheeses and pork) seems like it would flood their blood vessels with blood glucose and thus insulin, which facilitates fat storage as far as I've researched. By what mechanism is this fat storage reduced? | askscience | http://www.reddit.com/r/askscience/comments/ma4fs/what_accounts_for_the_french_paradox_why_are/ | {
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"score": [
16,
7,
6,
16,
7,
6
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"text": [
"As a chef I can say for two reasons. First are the portion sizes, a lot smaller than American plates. Secondly, a more natural diet.... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
2o956z | Sword vs spear combat | What is the view on historical developments in combat when using swords vs spears? The Romans famously used swords and defeated spear- (or pike-) using Greeks, but that to me seems to be the exception rather than the norm; is that correct? Are there cultures (La Tene?) that switched from primarily using swords to spear... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2o956z/sword_vs_spear_combat/ | {
"a_id": [
"cml7159"
],
"score": [
4
],
"text": [
"The spear, pike, halberd, when not used in a phalanx are typically best suited against cavalry/horse based combatants. The typical Roman foot soldier (legionnaire) would be using either gladius or spatha, in conjunction with a scutum, which was a... | [] | [] | [
[
"http://www.ancientmilitary.com/roman-weapons.htm",
"Amazon.com",
"http://www.cambridge.org/ca/academic/subjects/classical-studies/ancient-history/cambridge-history-greek-and-roman-warfare-volume-1",
"http://en.wikipedia.org/wiki/Peter_Connolly",
"http://www.amazon.com/Warfare-Classical-World-... | |
yzyoa | Is there any evidence about why "mood lighting" (dimmer lighting) makes people feel sexy or "in the mood"? | I am looking more for the reasons as to why it has that affect on people. Is it a learned behavior in that you learn to associate dim lights with romantic moods, such as in a nice fancy restaurant with dim lighting? If so, what started it?
The best thing I can think of is that the dimmer lights also has the effect on ... | askscience | http://www.reddit.com/r/askscience/comments/yzyoa/is_there_any_evidence_about_why_mood_lighting/ | {
"a_id": [
"c60g5gp"
],
"score": [
2
],
"text": [
"It's all about the dilated pupils.\n\nYour pupils dilate when you are interested in something or someone. This results in us subconsciously interpreting someone else's dilated pupils to indicate interest in us.\n\nYou lower the light, the pupils... | [] | [] | [
[]
] | |
1udhuv | what's the difference between the labour party and the liberal democrats in the uk? | I'm an American, and I was wondering what the difference was between the two parties. From a wikipedia standpoint, they seem similar - both being more progressive than the Conservatives. Also, in votes, do the two parties usually vote together? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1udhuv/eli5_whats_the_difference_between_the_labour/ | {
"a_id": [
"cegyt8n"
],
"score": [
6
],
"text": [
"The Labour Party's ideological tradition is democratic socialism, i.e. the establishment of state ownership of the means of production and the abolition of capitalism by democratic means, but they have moderated that stand somewhat with \"New Lab... | [] | [] | [
[]
] | |
6hdwev | Are poor people more susceptible to religious conversion? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6hdwev/are_poor_people_more_susceptible_to_religious/ | {
"a_id": [
"dixl7w8"
],
"score": [
2
],
"text": [
"Hi there - you may have more luck asking this question, as phrased, in /r/asksocialscience - the present tense in the question suggests you are interested in this in general rather than through history, and so that might be a question for sociolo... | [] | [] | [
[]
] | ||
mmoyi | Could you kill somebody by injecting a large pocket of air into their blood stream? | askscience | http://www.reddit.com/r/askscience/comments/mmoyi/could_you_kill_somebody_by_injecting_a_large/ | {
"a_id": [
"c325m3h",
"c325m3h"
],
"score": [
6,
6
],
"text": [
"Yes, though the amount of air required is somewhat questionable. When air gets into the blood stream it's known as a gas embolism, and it's not uncommon for it to happen during surgery. Most of the time it's harmless, howe... | [] | [] | [
[],
[]
] | ||
sosof | Why is the body unable to regulate the growth of all cancer cells? | I know that cancerous cells are fairly common throughout the body and that the body is typically able to regulate them without things getting out of hand. So why, then, are we sometimes unable to regulate cancer cells within our bodies? | askscience | http://www.reddit.com/r/askscience/comments/sosof/why_is_the_body_unable_to_regulate_the_growth_of/ | {
"a_id": [
"c4fptnc"
],
"score": [
2
],
"text": [
"When the body is unable to regulate cancerous cells, that's when cancer occurs. There are several fail-safe cellular devices that are meant to kill/nullify cancerous cells before they go hay-wire. For example, there are a few well known devices i... | [] | [] | [
[]
] | |
53q0rb | how does bell's experiment disprove local hidden variable theory | I have no academic relationship with physics so this might be a really stupid question. I apologize.
As far as I understand, randomness of polarization is a vital point of Bell's experiment. But if local hidden variable theory held, then the universe would (or could?) be completely deterministic, so polarization woul... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/53q0rb/eli5how_does_bells_experiment_disprove_local/ | {
"a_id": [
"d7vb11s"
],
"score": [
2
],
"text": [
"Indeed, to deal with one particular loophole these tests you need to be able to choose which measurements you're going to do on your particles (for example, what directions you'll be measuring polarization relative to), and you need to do it such... | [] | [] | [
[
"http://www.nature.com/nature/journal/v526/n7575/full/nature15759.html"
]
] | |
1d1t4x | how do facebook "meme" pages get revenue from 'likes' and 'shares'? | I understand how businesses get revenue from their Facebook pages (since it is more or less advertising), but for pages that only post memes or are for a 'cause' (such as the recent "R.I.P. For Boston Massacre Victims" page being for sale for $1000), how do they get worth? How does thousands of people liking and sharin... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1d1t4x/eli5_how_do_facebook_meme_pages_get_revenue_from/ | {
"a_id": [
"c9m24vx"
],
"score": [
3
],
"text": [
"They don't, but if someone buys the page they can then post a status and get something in front of all of those people who liked it, and thats valuable to some people. "
]
} | [] | [] | [
[]
] | |
1y662t | What do we know about the Natives of South Western Pennsylvania pre European settlement? | I know the people after Europeans arrived consisted of the Lenape, Shawnee, Iroquois and that the people that were hear prior are typically referred to as the Monogahela people.
My understanding is that when settlers arrive these people were gone and no one really knows why, some speculate disease arrived before set... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1y662t/what_do_we_know_about_the_natives_of_south/ | {
"a_id": [
"cfi1hjq",
"cfiffdk"
],
"score": [
5,
3
],
"text": [
"\"Circular Villages of the Monongahela Tradition\" by Bernard Means is a 2007 is a good overview of this poorly understood culture. Bernard Means also publishes extensively in specialized archaeolo... | [] | [] | [
[
"http://www.academia.edu/409895/Protohistoric_Monongahela_trade_relations_evidence_from_the_Foley_farm_phase_glass_beads"
],
[
"http://www.jstor.org/discover/10.2307/40914458?uid=3739256&uid=2&uid=4&sid=21103472793397",
"http://upload.wikimedia.org/wikipedia/commons/5/5e/Capt_John_Smit... | |
hq2kf | Why are jokes less funny when you've already heard them?
| askscience | http://www.reddit.com/r/askscience/comments/hq2kf/why_are_jokes_less_funny_when_youve_already_heard/ | {
"a_id": [
"c1xepm1",
"c1xfsbr"
],
"score": [
12,
3
],
"text": [
"Part of what makes jokes funny is the element of the unexpected, usually in the punchline. Once you've heard it, it's no longer surprising. /opinion",
"Jokes are a puzzle to be solved or an idea to be completed.\n\n\"Tw... | [] | [] | [
[],
[]
] | ||
71sgaz | Why does the spin of a Black Hole affect how it looks? | I was reading another post on here about black holes and Interstellar, and stumbled on [this](
_URL_0_) article. There is a difference between how a non-spinning black hole looks and how a spinning black hole looks. No matter whether it's spinning, the black hole still has the same density and gravity right? If so, ... | askscience | https://www.reddit.com/r/askscience/comments/71sgaz/why_does_the_spin_of_a_black_hole_affect_how_it/ | {
"a_id": [
"dnegq9b"
],
"score": [
8
],
"text": [
"It is not really appropriate to say density since it is a singularity but yes they should both have the same mass. However I think it has to do with the fact that spinning black holes twist spacetime with it's rotation. In short it creates an are... | [] | [
"http://iopscience.iop.org/article/10.1088/0264-9381/32/6/065001/pdf"
] | [
[]
] |
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