q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
value | subreddit stringclasses 3
values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
|---|---|---|---|---|---|---|---|---|---|
9o1yp5 | why hematocrit (ht) is usually three times the hemoglobin (hb)? | Hey there! Can someone ELI5 the "practical rule" the Ht is three times the Hb? How is this mathematically proven true?
Thanks a lot for the help! : ) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9o1yp5/eli5_why_hematocrit_ht_is_usually_three_times_the/ | {
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"Hi there - there’s no mathematical formula behind this, it’s more of an incidental observation.\n\nHaematocrit is the *percentage by volume* of red blood cells in total blood. \n\nBlood can be simply thought to be made up of plasma, which is flui... | [] | [] | [
[]
] | |
14bds2 | If the Earth became subject to another catastrophic event that left nearly everything extinct... | If the Earth became subject to another catastrophic event that left nearly everything extinct, would there be enough time for the world to populate itself (not necessarily humans, etc) or is it a little too late in the game for that? Recently I have read a lot of articles talking about the potential end of our sun, amo... | askscience | http://www.reddit.com/r/askscience/comments/14bds2/if_the_earth_became_subject_to_another/ | {
"a_id": [
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"Our sun isn't due to go red giant for another [5 billion years or so](_URL_0_). That's as long as Earth has been around already.\n\nWhen a mass extinction event occurs what happens is that lots of environmental niches open up - theres lots of foo... | [] | [] | [
[
"http://www.sciencelearn.org.nz/Contexts/Space-Revealed/Sci-Media/Images/Lifecycle-of-the-Sun",
"http://rspb.royalsocietypublishing.org/content/275/1636/759.abstract"
]
] | |
21huje | How did warfare change with the introduction of the flintlock musket? | Hello :)
I am currently working on research for a historical-fantasy novel, set in what would be our equivalent year of 1691 A.D. I have done a lot of research on customs, cultures, and politics of the period surrounding this date, but one large question that has yet to be answered clearly is on tactics and warfare. A... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/21huje/how_did_warfare_change_with_the_introduction_of/ | {
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"A bit of clarification is needed here - is your question about the impact of;\n\nA) The introduction of the *musket* - a gunpowder-based smoothbore projectile weapon that could be handled and operated by a single soldier\n\n... | [] | [] | [
[],
[]
] | |
slpvy | When measuring astronomical distances do we take into account the distance the object has traveled during the time it took the light to reach us? | For example, if we observe a galaxy that is a billion light years away, do we take into account how far that galaxy has moved in the billion years it took the light to reach us? And as a corollary, since the photons are caught up within the expansion of the universe, would the object have actually been closer than the ... | askscience | http://www.reddit.com/r/askscience/comments/slpvy/when_measuring_astronomical_distances_do_we_take/ | {
"a_id": [
"c4f08r0",
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"score": [
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"text": [
"Not usually, no. Most astronomical distances are rounded. Typically the numbers are so large that people just say things like \"millions of light years.\"",
"When you measure distances on cosmological scales there are ... | [] | [] | [
[],
[]
] | |
32el1f | What happens to a ship that sinks? | This is a based off a random thought in my head but I feel that it's pretty interesting to think about.
If a massive cargo ship sank, such as the CSCL Globe (look it up, it’s incredible), what would happen to it if it sank to the bottom of the ocean? I imagine that it would be crushed/flattened completely but that just... | askscience | http://www.reddit.com/r/askscience/comments/32el1f/what_happens_to_a_ship_that_sinks/ | {
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"Why would it be flattened? I think you misunderstand how water pressure works. Water pressure presses in on all sides rather than pressing down like a giant anvil. The structural stresses induced in a large ship as it sinks will break it into pie... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Wreck_of_the_RMS_Titanic"
]
] | |
dfcrch | Can we create ball lightning artificially? | askscience | https://www.reddit.com/r/askscience/comments/dfcrch/can_we_create_ball_lightning_artificially/ | {
"a_id": [
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"text": [
"Not a scientist at all.\n\nIt’s not well understood and it looks like it’s not even completely accepted as a naturally occurring phenomenon. Therefore there’s no way to recreate “natural” ball lightning because no one knows exactly how it happen... | [] | [] | [
[
"https://ui.adsabs.harvard.edu/abs/2010JETPL..92..630M/abstract",
"https://www.newscientist.com/article/dn24886-natural-ball-lightning-probed-for-the-first-time/",
"https://www.livescience.com/61946-ball-lightning-quantum-particle.html"
]
] | ||
8heocc | Does a simple fire emit ultraviolet light? lf no, then how does our sun do so? Ks it a matter of thermonuclear fusion, or something else? | askscience | https://www.reddit.com/r/askscience/comments/8heocc/does_a_simple_fire_emit_ultraviolet_light_lf_no/ | {
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"text": [
"The light radiated by a hot object has a central maximum at a wavelength determined by its absolute temperature and intensity falls off on both sides with a characteristic shape. In principle UV will be present at any tempe... | [] | [] | [
[],
[
"https://www.reddit.com/r/askscience/comments/8fz14e/can_you_get_vitamid_d_from_a_large_enough_fire/dy7jxal/?utm_content=permalink&utm_medium=front&utm_source=reddit&utm_name=askscience"
]
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3hhs4j | Question re: First Battle of the Marne (WW 1) | I'm listening to Dan Carlin's Hardcore History podcast about World War 1, and have just gotten to the point where the Grand Retreat halted and reversed the German advance at the Battle of the Marne.
Why did the German generals swerve from taking Paris? Did Moltke issue orders to pursue the French forces instead of ta... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3hhs4j/question_re_first_battle_of_the_marne_ww_1/ | {
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"The major thing is that taking Paris was not going to be some cake walk. Liege was hopelessly outnumbered and double pincered and it still took the Germans something of over a week to neutralize them fully. Paris was Liege on steroids. Shit Paris... | [] | [] | [
[]
] | |
wiqwl | What was Eastern warfare like? | We've read lots of posts about Western warfare, from the Ancient Greeks fighting the Persians to the Battle of Agincourt, but what about the East? Any books/website suggestions for an overview? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/wiqwl/what_was_eastern_warfare_like/ | {
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"text": [
"The Art of War by Sun Tzu, The Mongol Art of War by Timothy May, and Southeast Asian Warfare, 1300-1900 by Michael W. Charney.\n\nEdit: Mongols used psychological warfare, such as committing genocide after defeating a nation... | [] | [] | [
[],
[]
] | |
1s1x6p | what causes those moments of slight lightheadedness that feel out-of-body/surreal | My roommate and I were discussing these moments that we have both experienced recently. She described her thought process during these experiences as, "I feel like I *could* pass out sometime in the near future, but I know I'm not going to."
Does anybody else know what I'm talking about? Do these moments have a name? W... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s1x6p/eli5_what_causes_those_moments_of_slight/ | {
"a_id": [
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"text": [
"This may or may not be what you're talking about, but as someone stated below it sounds like switching from a sitting or prone position to standing really fast. This can cause a lightheaded feeling known as orthostatic hypotesnion or temporary lo... | [] | [] | [
[]
] | |
9ujb0c | what is the reasoning behind the texas law that says it’s illegal for a person serving (jail) time or out on probation to vote l in a political election ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9ujb0c/eli5_what_is_the_reasoning_behind_the_texas_law/ | {
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"text": [
"I imagine they want to keep people who break laws from influencing the law itself. \n\nBut the end result is just a method to disenfranchise whatever population you want to persecute."
]
} | [] | [] | [
[]
] | ||
6vtybg | why do so many people catch lobsters out of the ocean. isn't it easier and cheaper to raise them in a farm? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6vtybg/eli5_why_do_so_many_people_catch_lobsters_out_of/ | {
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"text": [
"It would be a massive time investment. If I remember correctly, it takes 5 to 7 years for a lobster to grow to only one pound. ",
"As I understand it, lobster larvae take a long time to mature, as w... | [] | [] | [
[],
[],
[]
] | ||
kr4em | how a newton's cradle knows how many balls you have pulled from one side to replicate the motion on the other side? | Specifically, why, when two balls are pulled back and released, doesn't one ball fly out the other side but instead twice as far? I mean that would satisfy conservation of momentum too wouldn't it? [Example here.](_URL_0_)
EDIT: Ok if I were five, I'd just be giving you a blank stare right about now. I'm still not co... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/kr4em/eli5_how_a_newtons_cradle_knows_how_many_balls/ | {
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"text": [
"A single ball moving twice as fast would satisfy conservation of momentum but not conservation of energy.\n\nEach ball has mass 1kg, and the two balls pulled back and released have... | [] | [
"http://www.school-for-champions.com/science/newtons_cradle.htm"
] | [
[],
[],
[],
[]
] | |
5rcq73 | when planets are visible from earth, why do they appear as stars to us on the surface of earth? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5rcq73/eli5_when_planets_are_visible_from_earth_why_do/ | {
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"Well, they do appear a *bit* different. For example, planets don't twinkle. Other than that, there's not much else which you can discern with your plain eye, so it makes sense for planets to look the sa... | [] | [] | [
[],
[],
[]
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9mwuw3 | what is with americans and the importance of not impeding the mail? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9mwuw3/eli5_what_is_with_americans_and_the_importance_of/ | {
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"And yet, someone broke into my mailbox and busted the lock, which impeded my ability to get mail for a nearly two months before th USPS got around to fixing it, because it's technically the Postal Service's responsibility. \... | [] | [] | [
[],
[]
] | ||
a72r32 | How does artificial food dye not dye your stool/urine? | From my understanding is that our body rids of waste through excretion, as I would imagine, artificial dyes would be "wasteful" to our bodies and would be excreted. If this is the case how does it not affect the color of our stool/urine? | askscience | https://www.reddit.com/r/askscience/comments/a72r32/how_does_artificial_food_dye_not_dye_your/ | {
"a_id": [
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" to answer your question: it doesnt get into the urine or stool because its broken down into non-coloured chemicals during digestion. \n\n & #x200B;\n\nbut 'artificial' doesnt really mean much in this context. for example, s... | [] | [] | [
[
"https://www.healthline.com/health/beeturia#causes"
],
[]
] | |
516p1u | [Computing] When a hacker gains access to a site's database (with the intent to crack passwords), do they also gain access to the hashing function? | If someone wants to do an offline attack on a database containing hashed passwords (using a brute force or dictionary attack), then I would assume that they also need access to the hashing function. Where do they get this? | askscience | https://www.reddit.com/r/askscience/comments/516p1u/computing_when_a_hacker_gains_access_to_a_sites/ | {
"a_id": [
"d7a25vz"
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"text": [
"The code of the website will contain references to the hashing function used. After all, the website will have to execute this function whenever someone tries to log in. In addition, the size of the hash can give some indication as to the hashin... | [] | [] | [
[]
] | |
2xq8s0 | If you put a speaker in a gas with high or low density, would it sound different? | askscience | http://www.reddit.com/r/askscience/comments/2xq8s0/if_you_put_a_speaker_in_a_gas_with_high_or_low/ | {
"a_id": [
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"text": [
"Higher density means higher speed of sound. So the wave will travel farther during each periodic cycle, meaning a longer wavelength. This might make it seem like the sound would be lower pitched. But even though the wavelen... | [] | [] | [
[],
[]
] | ||
3kwheb | how does australia now have a new prime minister without an election? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3kwheb/eli5_how_does_australia_now_have_a_new_prime/ | {
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"You vote for a representative for your local area. They may or may not belong to a party. The party or coalition with the most support i... | [] | [] | [
[],
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[],
[],
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] | |
ovgm7 | If I put on a coat to stay warm, will that make the room colder for everyone else? | askscience | http://www.reddit.com/r/askscience/comments/ovgm7/if_i_put_on_a_coat_to_stay_warm_will_that_make/ | {
"a_id": [
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"text": [
"Technically, yes. (But by a very, very tiny amount.) Here's the science:\n\nAssuming that the room is surrounded by an area that is colder (i.e. it has an external wall, and the temperature outside is lower than the temperature inside.) I am also... | [] | [] | [
[
"http://www.ugrad.math.ubc.ca/coursedoc/math100/notes/diffeqs/cool.html"
]
] | ||
djycs0 | why do things taste good or bad? why and how do our brains associate certain tastes with being pleasant or nasty? | If sugar is so bad for you, why did god make it taste so good? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/djycs0/eli5_why_do_things_taste_good_or_bad_why_and_how/ | {
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"Sugar tastes good because our sensation of taste comes from adaptations that came about when not getting enough food was the bigger concern. \n\nWe have receptors on our tongues that detect certain chemicals. Sugars, sodium, protein, fat, etc. Ou... | [] | [] | [
[]
] | |
2crljk | What was the first true "Role playing game" | Was there anything like dungeons and dragons earlier than the 20th century? What about LARPs or strategy games? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2crljk/what_was_the_first_true_role_playing_game/ | {
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"Ive been into strategy gaming since the mid 70s, both using miniatures and board based. I'd be curious if there were any actual 'gaming' historians around, but until one turns up I'll put my 2 cents worth in.\n\nPrior to th... | [] | [] | [
[],
[
"http://www.gutenberg.org/ebooks/3691"
]
] | |
103osa | What happens if you drink a two liter of coke and swallow a mentos whole? | askscience | http://www.reddit.com/r/askscience/comments/103osa/what_happens_if_you_drink_a_two_liter_of_coke_and/ | {
"a_id": [
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"score": [
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"text": [
"[Not very much](_URL_0_)"
]
} | [] | [] | [
[
"http://videos.howstuffworks.com/discovery/41458-mythbusters-exploding-stomach-minimyth-video.htm"
]
] | ||
3s4pue | Is it possible a powerful supernova could wipe out the earth with no way to detect its approach? | Similar to how we can not see light coming from a distant star before it reaches us could some destructive high energy rays traveling at the speed of light destroy our planet unexpectedly? | askscience | https://www.reddit.com/r/askscience/comments/3s4pue/is_it_possible_a_powerful_supernova_could_wipe/ | {
"a_id": [
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"text": [
"Not really. The nearest stars are all several light years away, so even if one of the stars that's close enough to be visible to the naked eye went supernova it would only be about as bright as the sun in the sky. The ensui... | [] | [] | [
[],
[]
] | |
2hrs6n | how do animals separate living objects from non living objects? | How does an animal perceive machines such as cars, for example. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2hrs6n/eli5_how_do_animals_separate_living_objects_from/ | {
"a_id": [
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"text": [
"It's probably quite a hard one to say for sure since we don't know what goes on in animals heads and they are quite different from dolphins to ants ect.\n\nBut I think it's safe to assume they for the most part may not have ... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Biological_motion"
]
] | |
1oejuy | when monkeys learn sign language do they just repeat things or do they sign for themselves | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1oejuy/eli5when_monkeys_learn_sign_language_do_they_just/ | {
"a_id": [
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"text": [
"Read about Koko the signing gorilla: _URL_0_",
"Koko, the most famous of the gorillas that learned sign language, did a [live chat](_URL_0_) with people over the internet back in 1998. If you read through it you can tel... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Koko_(gorilla)"
],
[
"http://www.koko.org/world/talk_aol.html"
]
] | ||
ackz2f | Askscience special thread - Panelists, what are you working on? | Some the older members of r/askscience might remember [this thread from a few years ago](_URL_0_) where we asked panelists of r/askscience to describe their research.
The idea to get our flaired users to post a brief description of one of their current projects. Hopefully this serves to foster some more detailed discu... | askscience | https://www.reddit.com/r/askscience/comments/ackz2f/askscience_special_thread_panelists_what_are_you/ | {
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"https://imgur.com/a/66gC3PF",
"http://web.mit.edu/aklotz/www/supernova.gif",
"https://www.physicsforums.com/insights/new-research-on-untying-knots-in-polymers/",
"https://en.wikipedia.org/wiki/Kinetoplast",
"http://web.mit.edu/aklotz/www/rotate.gif",
"http://web.mit.edu/aklotz/www/confoca... | |
opmdo | how scripting works and the differences between the different types, i.e.: c, c+, c++, c#, etc... | I am a total n00b when it comes to programming, but I would like to learn. A basic understanding of scripting would be a good starting point, IMHO. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/opmdo/eli5_how_scripting_works_and_the_differences/ | {
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"text": [
"'Scripting' often refers to quick and dirty programming tasks, which are often written in so called 'scripting languages'. These include fully functional languages like python and perl, which are much slower than a lower lev... | [] | [] | [
[
"http://python.org/"
],
[]
] | |
3c0hh2 | Why do tightrope walkers carry a long beam? | askscience | http://www.reddit.com/r/askscience/comments/3c0hh2/why_do_tightrope_walkers_carry_a_long_beam/ | {
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"text": [
"It works the same way as when you stick your leg out when you lose balance, to move your center of mass closer to directly above whatever you're walking on. A beam does so with much more effect than y... | [] | [] | [
[],
[],
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] | ||
abekbf | How the hell do siphonophores work? | In Siphonophores the organism is said to be composed of several distinct zooids.
How are these zooids differentiated from a single genetically uniform zygote?
How are they organised into distinct parts of the organism, do cells migrate or are all the zooids in different parts of the organism with no hybrid tissue?
... | askscience | https://www.reddit.com/r/askscience/comments/abekbf/how_the_hell_do_siphonophores_work/ | {
"a_id": [
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"text": [
"Siphonophores are a type of hydrozoan. Probably the best known hydrozoan is a [hydra](_URL_2_), a small freshwater animal that's similar to a sea anemone. I'm going to start off talking about hydras to explain the basics,... | [] | [
"https://en.m.wikipedia.org/wiki/Glaucus_marginatus"
] | [
[
"https://i.redd.it/eq3o1kkyb03y.jpg",
"https://www.kqed.org/science/1929993/this-adorable-sea-slug-is-a-sneaky-little-thief",
"https://en.wikipedia.org/wiki/Hydra_(genus\\)",
"https://vimeo.com/114198648",
"http://www.siphonophores.org/SiphPlan.php"
],
[
"https://en.wikipedia.org/wiki/... | |
11rsv2 | What impact did the V2/A4 Rocket have on WWII? | There seems to be quite a bit of criticism of the V2 program in the sense that it was a waste of resources for the Germans during WWII. [Wikipedia](_URL_0_) states that the program cost the equivalent of $3 billion, compared to the Manhattan Project cost of $1.9 billion.
* How accurate are these accounts of the pro... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/11rsv2/what_impact_did_the_v2a4_rocket_have_on_wwii/ | {
"a_id": [
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"text": [
"Overall, the V2 rocket had a negligible impact on the war, although it had potential. From over 3,000 rockets fired on Britain, only about 7,500 civilians died as a result. This was partially due to an act of deception by Br... | [] | [
"http://en.wikipedia.org/wiki/V-2#Assessment"
] | [
[],
[
"http://en.wikipedia.org/wiki/Operation_Aphrodite",
"http://en.wikipedia.org/wiki/Siracourt_V-1_bunker"
]
] | |
apo5py | How rapidly (or not) does a newborn star "ignite" once it reaches critical mass? Hours, days, years? | askscience | https://www.reddit.com/r/askscience/comments/apo5py/how_rapidly_or_not_does_a_newborn_star_ignite/ | {
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cckmi1 | is there a reason the color blue doesn’t appear very often in nature? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cckmi1/eli5_is_there_a_reason_the_color_blue_doesnt/ | {
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"I found this article cause I also wanted to know, if you're in for some reading: _URL_... | [] | [] | [
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[],
[],
[],
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"https://www.wnycstudios.org/story/211119-colors"
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"https://en.m.wikipedia.org/wiki/Blue–green_distinction_in_language",
"https://www.wnycstudios.org/story/211213-sky-isnt-blue"
]
] | ||
4bcqt3 | Why didn't the Imperial Japanese Navy commit more conventional surface forces to the attack on Pearl Harbor | I'm wondering why the attack was conducted with mainly aviation assets. Could they not have had better results, as well as scout and engage American avation ships should they appear, if they brought more assets. Basically, why not a commited battle instead of a hit-and-run? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4bcqt3/why_didnt_the_imperial_japanese_navy_commit_more/ | {
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"Because the Japanese fleet was operating at the limit of its endurance as it was, and the raid was intended from the start to be a raid, not a sustained battle. \n\nI've written more about the Pearl Harbor attack before, [here](_URL_1_) and /u/pa... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3773pm/what_was_the_japanese_objective_against_the_us_in/crlb6r3",
"https://www.reddit.com/r/AskHistorians/comments/3dxlh4/what_did_japan_hope_to_accomplish_by_attacking/"
]
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so6w0 | Adam's Apple | What is an Adam's Apple? What function does it serve and why do only men have one? Or, do women have one and it's just not showing? | askscience | http://www.reddit.com/r/askscience/comments/so6w0/adams_apple/ | {
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"text": [
"The Adam's Apple, or laryngeal prominence is simply a protrusion of thyroid cartilage.\n\nWomen have the exact same cartilage, but because the male larynx lowers and enlarges more than the female during puberty it creates a ... | [] | [] | [
[],
[]
] | |
4d6px6 | taurine, its role in bodily functions, and why it is in energy drinks | What it do | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4d6px6/eli5_taurine_its_role_in_bodily_functions_and_why/ | {
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"It's an amino acid which is widely distributed in the tissues of the body and manufactured by the body if the person has a normal diet. It is in energy drinks because the manufacturers make money using a version of the following fallacious argume... | [] | [] | [
[]
] | |
6x6z54 | why do anti-biotics have to be taken at regular intervals? | Posted this earlier, removed as a repost. After a search, my question is still unanswered.
I'm currently on a prescription for a chest infection, and my anti-biotics have instructions to be taken at regular intervals throughout the day. Does this have an impact on the efficacy of the anti-biotics? Is it more for remem... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6x6z54/eli5_why_do_antibiotics_have_to_be_taken_at/ | {
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"The goal is to keep the amount of the antibiotic in your system consistently high. If you were to just take a dose and then throw the rest away, the only bacteria that it would kill would be those not well adapted to deal wi... | [] | [] | [
[],
[]
] | |
2or35l | why is the body of a 400-lb person able to carry around 200 lbs extra day after day, but a healthy 200-lb person who weight trains extensively would be exhausted carrying 200 lbs for an hour? | I know a man who weighs in at a little over 400 pounds. He is at least 200 lbs overweight and has gained the weight over 4 years. He leads a pretty normal life.
On the other hand I know a guy who has weight-trained almost every day for 4 years. He could pick up a bar with 200 lbs of weight, but an hour of carrying it... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2or35l/eli5_why_is_the_body_of_a_400lb_person_able_to/ | {
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"A 400lb man's weight is centralized to his f... | [] | [] | [
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e3cset | What happens if several historians write about the same topic/historical event? | Dear all,
this somewhat relates to my previous post [here](_URL_0_).
I am wondering what happens if several historians write about the same topic/event/phenomenon. As far as I can see, that happens all the time in history. Just think about how many books have been written about World War 1.
I am wondering how such h... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/e3cset/what_happens_if_several_historians_write_about/ | {
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"text": [
"No work of history exists in a vacuum, and needs to acknowledge the ways in which it relies on the work of others. But for academic writing at least, it's expected that the thesis at least will be origi... | [] | [
"https://www.reddit.com/r/AskAcademia/comments/e1ptko/how_to_deal_with_an_articlebook_coming_out_that/"
] | [
[],
[],
[]
] | |
2ys329 | why does my car's battery die after a month without being driven? | It's just been sitting outside, the weather's been good, and the headlights weren't left on. Where did the electricity go? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ys329/eli5_why_does_my_cars_battery_die_after_a_month/ | {
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"text": [
"If your car has an alarm it's going to be using the battery for power",
"Car batteries come in different types and some cars use power while not being on for things like an alarm or a light on a dash or something to that... | [] | [] | [
[],
[]
] | |
1ko28n | If 2 space ships accelerated away from each other at 1/2 the speed of light, what would they see behind them? | Two identical space ships are travelling in space at 0 m/s relative to each other. They both face away from each other and then instantly accelerate to 1/2 the speed of light away from each other. I know that in a Newtonian universe they would be travelling at the speed of light away from each other, but special relati... | askscience | http://www.reddit.com/r/askscience/comments/1ko28n/if_2_space_ships_accelerated_away_from_each_other/ | {
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"When properly adding relativistic velocities, two ships going half the speed of light away from each other in ... | [] | [] | [
[],
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"http://en.wikipedia.org/wiki/Velocity-addition_formula"
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[],
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"http://gamelab.mit.edu/games/a-slower-speed-of-light/"
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"http://www.reddit.com/r/sciencefaqs/comments/hoi8o/if_you_have_two_very_high_relative_velocities_why/"
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[],
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"http://en.wikipedia.org/wiki/Relati... | |
ujw0v | If low temperatures slow down cells, do people who live in cold climates have a longer life expectancy? | i know that low temperatures slow down cell activity, but does that mean people who live in cold climates will live longer due to slower cell growth/regeneration? or will the cold climates cause them to get sick earlier? | askscience | http://www.reddit.com/r/askscience/comments/ujw0v/if_low_temperatures_slow_down_cells_do_people_who/ | {
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"text": [
"You should probably remember that humans are warm blooded, which means they all operate at around 37 degrees Celsius."
]
} | [] | [] | [
[]
] | |
789jse | how does a toxicology test work? | When a person's blood is tested for drugs, how does the lab determine which drugs are present? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/789jse/eli5_how_does_a_toxicology_test_work/ | {
"a_id": [
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"score": [
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"text": [
"Using analytic equipment. There are machines called Mass Spectrometers that take a sample, and can display the mass, and rough percentage of how much of the sample is comprised of the given compound.\n\nSo if I run a blood sample through a typic... | [] | [] | [
[]
] | |
9u1wq8 | Many americans apparantly moved to the Soviet Union in the early 1930s. How well did they adapt to Soviet life? Did they survive the great purge? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9u1wq8/many_americans_apparantly_moved_to_the_soviet/ | {
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"text": [
"There's a lot more to say on the subject (a couple books' worth at least!), but for starters you might want to check out an [answer](_URL_0_) I wrote recently on the topic."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/9rm0m7/comment/e8i8d4t"
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] | ||
1rdjrw | how come when you use a faucet in tall buildings, water comes out? how does it 'flow upwards'? | I've heard of pumps, but even in 3 story homes without a pump it still flows up to come out the faucet. On that note, how is water pressure made? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rdjrw/eli5_how_come_when_you_use_a_faucet_in_tall/ | {
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"There is always a pump.",
"A lot of large buildings will have their own pumping station and a reservoir on the roof. ",
"This is part of what I do at my job, so maybe I can help explain.\n\nThe ... | [] | [] | [
[],
[],
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] | |
105qcd | Is menopause an artifact? As in people did not used to live that long so the body never evolved to produce eggs in twilight years. | Is menopause just an artifact of a time when humans did not live far beyond their 30s or 40s? So the human body did not evolve to produce eggs in a woman's twilight years? | askscience | http://www.reddit.com/r/askscience/comments/105qcd/is_menopause_an_artifact_as_in_people_did_not/ | {
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"There are a couple hypotheses out there, falling in two main camps. The first supports a kin selection model where the grandmother enhances the survival of her grandchildren (and thus 1/4 of her genet... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Behavioral_modernity",
"http://www.anth.ucsb.edu/faculty/gurven/papers/GurvenKaplan2007pdr.pdf"
],
[]
] | |
1u4pb4 | During the 1974 World Cup in West Germany, were East Germans allowed to enter West Germany/Berlin to support their team? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1u4pb4/during_the_1974_world_cup_in_west_germany_were/ | {
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"According to [this article in Frankfurter Allgemeine Zeitung](_URL_1_) from 2006 the average GDR citizen was not allowed to attend games during the World Cup in West Germany. Instead fans were handpicked when \"worthy and reliable\". According to... | [] | [] | [
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"http://i.imgur.com/weq5yJX.jpg",
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"http://www.youtube.com/watch?v=mdVcwN4U8Lc+"
]
] | ||
a4ywha | Capturing ships? | I've heard that in pre- and early-modern times, during war the capture of enemy naval ships was often the preferred outcome of an engagement. Once captured, what was done with the ship? How damaged/seaworthy would the captured ship be? What would be done with its crew, and who would man the ship after capture? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a4ywha/capturing_ships/ | {
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"text": [
"Prize policy and prize law are *massive* subjects in maritime history, so I won't be able to give you a completely comprehensive answer. I'll focus mostly on the Royal Navy and the U.S. Navy roughly between 1800 and 1900. This, of course omits ma... | [] | [] | [
[
"http://www.admiralnelson.info/TrafalgarStorm.htm"
]
] | |
5f33vi | why are pages in textbooks divided down the middle or sometimes into three columns? | It's annoying and makes it hard to read, is it supposed to have the opposite effect or something? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5f33vi/eli5_why_are_pages_in_textbooks_divided_down_the/ | {
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"text": [
"Simply put, it's easier for people to read short lines without losing track of where they are. If the lines get too long, it's harder to scan back to the beginning of the line without losing track of where you are making i... | [] | [] | [
[],
[]
] | |
254yub | Other than cost and regulations, what challenges or technological limitations are preventing the rollout of driverless cars to the public? | It seems that market and political forces will inevitably solve the problems of cost and legality, assuming the technology is ready. So my question is: Is the technology ready? If not, what are the current limitations? | askscience | http://www.reddit.com/r/askscience/comments/254yub/other_than_cost_and_regulations_what_challenges/ | {
"a_id": [
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"score": [
2,
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"text": [
"There is something called a reliability number, which is how confident you are thst your product will behave as planned. In this case, behavior encompasses not crashing. To have thst number reach acceptable numbers, you have... | [] | [] | [
[],
[
"https://sites.google.com/site/gessicadriverless/3-legal-and-ethical-issues-involved"
]
] | |
ynn45 | how come raw eggs are bad to eat now? 20 years ago, i'd put a raw egg in a milkshake and eat the hell out of cookie/cake/brownie batter. now if i do it, i get sick. what happened? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ynn45/eli5_how_come_raw_eggs_are_bad_to_eat_now_20/ | {
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"If you are a healthy person with normal immune system, then raw eggs are just edible as they were before. Howeve... | [] | [] | [
[],
[],
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6rvfui | Because of the curvature of the Earth, are nearby skyscrapers closer together at the base than they are at the top? | askscience | https://www.reddit.com/r/askscience/comments/6rvfui/because_of_the_curvature_of_the_earth_are_nearby/ | {
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"Yes.\n\nIf the two 100-floor buildings are one NYC block apart, which is 0.05 mile or 1/500000 of Earth's circumference, their 100th floors, which are .2 mile higher than their first floors, are goin... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Akashi_Kaiky%C5%8D_Bridge#Structure",
"https://en.wikipedia.org/wiki/Humber_Bridge#Bridge_statistics"
],
[
"http://mathscinotes.com/2017/01/effect-of-earths-curvature-on-suspension-bridge-dimensions/"
]
] | ||
7d651z | What was the shifting nature of authority like during the decline of the "Wild West" in the US? | I'm in the process of writing a western feature script that is set during the twilight of the "Wild West" after the Frontier was considered closed by the Census Bureau in 1890. More specifically my story is set around 1908-1910, and a large theme I'm playing with is how products of the west (outlaws, sheriffs, etc.) ar... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7d651z/what_was_the_shifting_nature_of_authority_like/ | {
"a_id": [
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"text": [
"Since you're correct that this is very broad, and also as I don't think that given you want this research for a script, I don't think that an answer written here would do you justice, so instead allow be to point you in the direction of a source... | [] | [] | [
[]
] | |
dtg1tj | Why is varicella more dangerous to get as you grow older? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/dtg1tj/why_is_varicella_more_dangerous_to_get_as_you/ | {
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"text": [
"You could say that its not more dangerous as you get older since it is the same virus. Or maybe all illnesses can be more dangerous with age. The perceived difference comes from the people who get the i... | [] | [] | [
[],
[],
[]
] | |
2u87mg | Why are bulldogs a popular mascot in American collegiate athletics? | It seems like bulldogs are a pretty common mascot for American Universities and their athletic programs. Why was this breed singled out? Why aren't other breeds popular as mascots? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2u87mg/why_are_bulldogs_a_popular_mascot_in_american/ | {
"a_id": [
"co60cy5"
],
"score": [
2
],
"text": [
"because it's known as a very determined breed of dog"
]
} | [] | [] | [
[]
] | |
364cme | how is the death penalty seen as justice and not revenge? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/364cme/eli5_how_is_the_death_penalty_seen_as_justice_and/ | {
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"text": [
"Who says it can't be both? The law mandates that crime begets punishment, and execution is seen by many as an appropriate (perhaps the ultimate) punishment.\n... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
1jxdun | how does a game console know the difference between a retail disc and a burned disc? | Also what does a modchip do to overcome whatever protection there is? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jxdun/eli5_how_does_a_game_console_know_the_difference/ | {
"a_id": [
"cbj7shx"
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"score": [
2
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"text": [
"A burned disc contains only the directly-readable digital content of the game. Retail discs contain other features - extra tracks not readable by most disc readers, specific wobble in the tracks, error correction codes that don't actually correct... | [] | [] | [
[]
] | |
27bwp1 | How are the colors determined in colored space pictures (of planets and galaxies)? | I was astounded about a year ago when a picture of mercury was released that had the colors enhanced to demonstrate the minerals on its surface. (Picture: _URL_1_)
We see so many pictures of various far off galaxies and galactic clusters, beautifully colored, but how are these colored determined? The pictures are take... | askscience | http://www.reddit.com/r/askscience/comments/27bwp1/how_are_the_colors_determined_in_colored_space/ | {
"a_id": [
"chzwi71"
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"score": [
2
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"text": [
"You are asking about 2 different types of photos. In the Mercury case its a false color enhanced photo. After the photo was taken in whatever wavelengths (it might not have been visible light) the data was shifted so that the differences stand ou... | [] | [
"http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Carina_Nebula.jpg/1280px-Carina_Nebula.jpg",
"http://static.dnaindia.com/sites/default/files/1800570.jpg"
] | [
[
"http://www.jacknewton.com/",
"http://www.jacknewton.com/images/B&B%20web%20photos/Sun-02-09-01color1.jpg"
]
] | |
cpsmsz | How should common people research about a historical topic? | I don't know if this type of questions is allowed or not here, but I'll ask anyway. My question is that how should we, common people who haven't studied History academically in college or university, research about a certain historical topic on the internet or offline? (internet is preferred) Whenever I want to know ab... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cpsmsz/how_should_common_people_research_about_a/ | {
"a_id": [
"ewrju33"
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"score": [
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"text": [
"The reason people accuse \"history\" of being propaganda is because history is important. People base claims to their identities, their nations, their actions, their morality, and so on, on historical claims. So it is going to be as complicated ... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/books"
]
] | |
etbwf9 | How often a day/month/etc. do stars cease to exist? | Is there a general "dying" rate of stars as far as we know? | askscience | https://www.reddit.com/r/askscience/comments/etbwf9/how_often_a_daymonthetc_do_stars_cease_to_exist/ | {
"a_id": [
"fffcir0"
],
"score": [
37
],
"text": [
"On what scale are we talking about?\n\nIn our solar system stars die about once every 10 billion years. (We only have one star in our solar system.)\n\nIn our Galaxy there are several stars ending their lives at any given moment. Most star death... | [] | [] | [
[]
] | |
46e9rw | How could the Yuan field 650.000 men in a 14th century battle ? | The wiki article about the [Battle of Lake Poyang](_URL_0_) states ridiculous high numbers of troops for a medieval battle. How were they able to supply and command these large forces at that time? Or is there a catch that I can't see? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/46e9rw/how_could_the_yuan_field_650000_men_in_a_14th/ | {
"a_id": [
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3
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"text": [
"Sources from the early modern era and before are generally speaking not reliable when it comes to numbers of troops in a given battle. It is surprisingly difficult to count an army that's large enough that the troops can't... | [] | [
"https://en.wikipedia.org/wiki/Battle_of_Lake_Poyang"
] | [
[
"https://www.reddit.com/r/AskHistorians/comments/400x08/do_we_believe_the_figures_for_ancient_battles/",
"https://www.reddit.com/r/AskHistorians/comments/2fzrtr/can_the_army_sizes_given_in_historical_accounts/"
],
[]
] | |
22lg36 | what does adrenaline do so that you don't feel the pain , such as from a knife wound or a gunshot? | English is not my mother language so sorry for the bad grammar. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22lg36/eli5what_does_adrenaline_do_so_that_you_dont_feel/ | {
"a_id": [
"cgnye2o",
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"score": [
4,
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"text": [
"It's been a while since I've taken endocrinology so someone can correct me if I'm wrong and add what I miss. Adrenaline causes a feedback loop of hormones that do things such as increase your heart rate and your reaction tim... | [] | [] | [
[],
[]
] | |
1sdtkn | Did any of the 17th century European powers take the concept of Sweden forming colonies in North America serious? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1sdtkn/did_any_of_the_17th_century_european_powers_take/ | {
"a_id": [
"cdwv7y2"
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"score": [
2
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"text": [
"The Dutch and Spanish took it seriously.\n\nThe Dutch Governor of New Netherlands, Willem Kieft, lodged a formal complaint with the Governor of New Sweden Peter Minuit (then in Swedish service) over the colonisation of what he considered Dutch la... | [] | [] | [
[]
] | ||
3dhdox | why don't we put probes/satellites to orbit the other planets in solar system ? | askscience | http://www.reddit.com/r/askscience/comments/3dhdox/why_dont_we_put_probessatellites_to_orbit_the/ | {
"a_id": [
"ct5h9jy"
],
"score": [
3
],
"text": [
"We do! Check out [this diagram](_URL_3_) of where all our current probes are. Mars is looking *very* crowded. [Juno](_URL_4_) will arrive at Jupiter in a year and start orbiting. [Cassini](_URL_2_) is currently orbiting Saturn. [Messenger](_URL_0... | [] | [] | [
[
"https://en.wikipedia.org/wiki/MESSENGER",
"https://en.wikipedia.org/wiki/Akatsuki_(spacecraft\\)",
"https://en.wikipedia.org/wiki/Cassini%E2%80%93Huygens",
"http://www.planetary.org/multimedia/space-images/charts/whats-up-in-the-solar-system-frohn.html",
"https://en.wikipedia.org/wiki/Juno_(s... | ||
haegs | If you were floating in a large body of water that was struck by lightning, how strong would the shock be, depending on proximity? | askscience | http://www.reddit.com/r/askscience/comments/haegs/if_you_were_floating_in_a_large_body_of_water/ | {
"a_id": [
"c1tx3vi",
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"score": [
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3
],
"text": [
"When lightning strikes a large body of water, it dissipates by running along the surface of the water (mostly). It spreads out fairly evenly, but only in 2 dimension. The fall off with distance away from the strike source ... | [] | [] | [
[],
[]
] | ||
34bvoi | Will we be able to see a flat surface that is only one atom thick? | askscience | http://www.reddit.com/r/askscience/comments/34bvoi/will_we_be_able_to_see_a_flat_surface_that_is/ | {
"a_id": [
"cqt8006",
"cqt95au"
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"score": [
80,
7
],
"text": [
"Yes. \n\n_URL_0_\n\nThat is what a single layer of 1 atom thick graphene looks like.",
"Regardless of thickness, light will bounce off matter, even matter that's only one atom thick. Whether the amount of light is dete... | [] | [] | [
[
"http://cdn.phys.org/newman/csz/news/800/2015/2-graphenebase.jpg"
],
[]
] | ||
fk33ru | Why can't we just put some dead COVID-19 viruses in a syringe and call it a vaccine? | Isn't that what vaccines are? I know there's a reason why but I'm too ignorant to know it. | askscience | https://www.reddit.com/r/askscience/comments/fk33ru/why_cant_we_just_put_some_dead_covid19_viruses_in/ | {
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"score": [
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"text": [
"Viruses aren't dead or alive. \n \nLayman description: Effectively a virus is a sphere of proteins that contain some DNA or RNA. When... | [] | [] | [
[],
[],
[],
[],
[
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1114166/",
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2928990/",
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6351694/",
"https://www.sciencealert.com/who-says-a-coronavirus-vaccine-is-18-months-away",
"https://www.healt... | |
ev7puk | why is comedy less funny the more you watch it? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ev7puk/eli5_why_is_comedy_less_funny_the_more_you_watch/ | {
"a_id": [
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"score": [
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"text": [
"Comedy is probably best defined as the juxtaposition between the expected and the actual. For example, take the simple joke:\n\nTwo men walk into a bar, but neither one ducked.\n\nYou expected that \"b... | [] | [] | [
[],
[],
[]
] | |
bjqeob | why does online video (specifically youtube) get so insanely blurry at lower resolutions? why doesn’t the 240p option output a sharp and pixelated video? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bjqeob/eli5_why_does_online_video_specifically_youtube/ | {
"a_id": [
"emae92t"
],
"score": [
4
],
"text": [
"You could always use VLC to watch YouTube. Then you can go:\n\n Tools- > Preferences- > Video- > Show Settings- > All- > Video- > Filters- > Swscale\n\nAnd choose something like \"Nearest Neighbour\". I predict that you will quickly decide t... | [] | [] | [
[]
] | ||
dob7ra | How are nuclear arms/weapons safely created and stored to prevent accidents related to arming and detonations? | How do we *know* that nuclear arms in storage silos/warehouses are 'safe' in storage? Is there a near-zero% chance for them to accidentally go off?
Thinking of *every* aspect of humanity and how, somewhere along the lines of bureaucracy, there's a human being slacking/messing up - doesn't that also apply for nuclear d... | askscience | https://www.reddit.com/r/askscience/comments/dob7ra/how_are_nuclear_armsweapons_safely_created_and/ | {
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"f5mpiuy",
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"score": [
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],
"text": [
"Very simple explanation: \n\nSo the core is required to be compressed in order to achieve a real nuclear blast. The core is a ball of reactive material, like plutonium. It is su... | [] | [] | [
[],
[],
[
"https://www.youtube.com/watch?v=DQEB3LJ5psk&feature=youtu.be&list=PLouetuxaIMDrht4F8xiS4AY-oLvCq77aA",
"http://blog.nuclearsecrecy.com/wp-content/uploads/2013/09/Mk-39-ready-safe-switch.jpg"
],
[
"https://youtu.be/DQEB3LJ5psk",
"https://youtu.be/sb2qo5m_hTY",
"https://... | |
1owxbm | why do sister cellular companies such as simple mobile (t-mobile) exist, isn't that competition to themselves? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1owxbm/eli5why_do_sister_cellular_companies_such_as/ | {
"a_id": [
"ccwhzxn",
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"score": [
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2
],
"text": [
"They aren't related at all. Companies like Simple Mobile have contracted with other companies, in this case T-Mobile, to sell their own service using the T-Mobile network. Simple mobile is MVNO service and has nothing to d... | [] | [] | [
[],
[]
] | ||
1ofu2e | how does a grandfather clock work? | how do clocks that work off gears weights and pendulums work? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ofu2e/eli5_how_does_a_grandfather_clock_work/ | {
"a_id": [
"ccrk8ic"
],
"score": [
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],
"text": [
"The weights provide the power to turn the gears that turn the hands on the clock. The pendulum is connected to this mechanism such that the gears/hands can't turn any faster than the pendulum allows. And a pendulum has a time to swing that depe... | [] | [] | [
[
"http://upload.wikimedia.org/wikipedia/commons/e/ee/Scappamento.gif"
]
] | |
8bh0s5 | Do objects other than black holes emit Hawking radiation? | Why *just* black holes? Does it suddenly stop after it's not a black hole anymore? What happens then anyway? | askscience | https://www.reddit.com/r/askscience/comments/8bh0s5/do_objects_other_than_black_holes_emit_hawking/ | {
"a_id": [
"dx6mwn8"
],
"score": [
13
],
"text": [
"Hawking radiation is a form of [Unruh radiation](_URL_0_). The ground state of space (\"vacuum\") looks different for different observer: What you might see as empty space appears to be full of radiation for another accelerating observer.\n\nThi... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Unruh_effect"
]
] | |
4hab0z | why do some all-organic, natural healthy etc. fruit juice drinks have 0% vitamin c? | And its not like the fruits in them have no vitamin C. So why is this?
| explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4hab0z/eli5why_do_some_allorganic_natural_healthy_etc/ | {
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"score": [
7,
2,
2,
4
],
"text": [
"Grapes have very little vitamin C. But I am not aware of any case where the fruit *does* have plenty of vitamin C and then its juice *doesn't.* Can you please provide a link to su... | [] | [] | [
[],
[],
[],
[]
] | |
5hzytu | do wild animals know if humans are trying to help them (i.e. stuck sheep or trapped bear cubs)? | Like do they "feel grateful" that they were helped? Probably a dumb question but I always wanted to know. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5hzytu/eli5_do_wild_animals_know_if_humans_are_trying_to/ | {
"a_id": [
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"score": [
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69,
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],
"text": [
"It depends on the situation and on the animal. Sometimes the critter is so wound up they will go for anybody, so you have to dart them or cover them so they can't hurt you while ... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Theory_of_mind_in_animals#In_nonhuman_primates",
"https://en.wikipedia.org/wiki/Theory_of_mind"
],
[],
[
"http://www.npr.org/sections/thesalt/2016/07/21/486471339/how-wild-birds-team-up-with-humans-to-guide-them-to-honey",
"http://www.telegraph.co.uk/news... | |
13jr6u | realism (international relations) & the cold war | If possible, I'd like to learn the concept of realism (that is, the international relations theory) and **how it could be used as an approach to explain the Cold War.**
Likewise, what kinds of realist theories are there? What is the difference between **classical realism** and **neo-realism/structural realism**?
I w... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/13jr6u/eli5_realism_international_relations_the_cold_war/ | {
"a_id": [
"c74kh16",
"c74m0be",
"c74o547"
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"score": [
3,
2,
18
],
"text": [
"It won't be much help with realism theory, but you might enjoy this series of international relations videos:\n\n[International Relations 101: Looking at international relations from a strategic perspe... | [] | [] | [
[
"https://www.youtube.com/playlist?list=PLB5965C13F4B0B2DA&feature=view_all"
],
[],
[]
] | |
2p3fem | Help with U.S. Army WWII history? Investigating a family member's last letter. | I have a great uncle that died in France (that's where he's buried) in 1944. I just received scans of A) his last letter to his brother in law with instructions to give it to his wife if he dies, B) the envelope that letter was in, and C) The postcard his wife received when he died.
[This image is items B and C. The ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2p3fem/help_with_us_army_wwii_history_investigating_a/ | {
"a_id": [
"cmt4m5a"
],
"score": [
3
],
"text": [
"At the Top of your great-uncle's letter his return address is \"Co. B 10th Inf\" which means B company of the 10th Infantry regiment. \n\nHere is the wikipedia entry for the 10th Infantry regiment.\n_URL_1_\n\nAccording to that wikipedia (Mods f... | [] | [
"http://i.imgur.com/pjPtAWb.png"
] | [
[
"http://en.wikipedia.org/wiki/5th_Infantry_Division_%28United_States%29#Normandy_landings",
"http://en.wikipedia.org/wiki/10th_Infantry_Regiment_%28United_States%29"
]
] | |
55bgcp | why are subtitles sometimes out of sync and progressively get worse? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/55bgcp/eli5_why_are_subtitles_sometimes_out_of_sync_and/ | {
"a_id": [
"d897i0w",
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"score": [
4,
2
],
"text": [
"Its playing slightly slower than the movie, so the problem accumulates. When you pause, it resets because subtitles are usually linked to specific times in a movie.\n\nA decent free media player (like gomplayer, my go to) w... | [] | [] | [
[],
[]
] | ||
13y7fs | how true knowledge of future events have a bearing on the current ones? | I was talking to my nephew, while playing a game where you can stop and rewind time. He asked "Why can you do something different?" and I had no simple answer. How do I explain rewinding time to a six year old? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/13y7fs/elif_how_true_knowledge_of_future_events_have_a/ | {
"a_id": [
"c787j9e",
"c787r8e"
],
"score": [
3,
4
],
"text": [
"The same way that you can shoot fireballs by touching a flower. Because the game allows you to do something different.",
"[Here's Martin Gardner's kid-friendly introduction to time travel and the paradoxes it creates.](... | [] | [] | [
[],
[
"http://books.google.com/books?id=UNfWR8tGp4wC&lpg=PA150&ots=M25-u67ZbK&pg=PA150#v=twopage&q&f=false"
]
] | |
7klu30 | probably a dumb question but here goes. if someone has lice why exactly can't they just dip their head in water and drown the lice? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7klu30/eli5_probably_a_dumb_question_but_here_goes_if/ | {
"a_id": [
"drfatfc",
"drfaw0j",
"drfaw2n"
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"score": [
5,
7,
14
],
"text": [
"It'd be hard to drown lice. But I think it's a good question.\n\n*Research has shown lice can survive when immersed in water for 14 hours at 86–98°F.*\n\nsource: google search",
"because lice can s... | [] | [] | [
[],
[],
[]
] | ||
2cxoy0 | In 1950 do you think the people at the top of the USSR really believed in communism (or believed they believed) and thought their actions were somehow good for it, or do you think they were just in it for the power? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2cxoy0/in_1950_do_you_think_the_people_at_the_top_of_the/ | {
"a_id": [
"cjk3jvh"
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"score": [
2
],
"text": [
"Just a quick modnote.\n\nThis question is worded to ask \"do you believe...\"\n\nIf you choose to answer this question, please be prepared to reference documents that demonstrate what senior Soviet leadership thought. Please *do not* justify your... | [] | [] | [
[]
] | ||
3mq1rp | if there were bacteria on mars, why wouldn't it be everywhere like on earth? | Bacteria covers every surface on earth. If there were any bacteria on Mars, why wouldn't it reproduce until it also covered every surface?
| explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mq1rp/eli5_if_there_were_bacteria_on_mars_why_wouldnt/ | {
"a_id": [
"cvh32d5"
],
"score": [
4
],
"text": [
"Mars lacks a functional magnetosphere to protect the planet's surface from the Sun's radiation, and the atmosphere is incredibly thin and diminishing more every day. As a result there are very few locations on Mars where bacterial life could live... | [] | [] | [
[]
] | |
7xu6qg | If I were to release oxygen into the vacuum of space where would it go? | Would it just float, would it be attracted to the strongest gravitational field, would it compress? In the case it floats would I be able to breath in space if I were standing in it? | askscience | https://www.reddit.com/r/askscience/comments/7xu6qg/if_i_were_to_release_oxygen_into_the_vacuum_of/ | {
"a_id": [
"dubfjr3",
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36,
16,
10
],
"text": [
"For small amounts, it would just disperse. If you have HUGE amounts of it (like the size of a large planet), it will have enough mass to clump together. However, things like solar winds will also p... | [] | [] | [
[],
[],
[]
] | |
2djnzo | Could we have wifi in the visible spectrum of light? | I know that wifi uses electromagnetic waves. Could you have wifi that sends signals in the visible range? Would our eyes receiving the light screw with it?
I realize that it wouldn't work for actual use, because anything that we can see would block the signal, but is it theoretically possible? | askscience | http://www.reddit.com/r/askscience/comments/2djnzo/could_we_have_wifi_in_the_visible_spectrum_of/ | {
"a_id": [
"cjq76nf",
"cjqa168"
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"score": [
25,
3
],
"text": [
"Yes, we already have this. It's called [free-space optical communications](_URL_0_). In the simplest example, if you stand on one mountain at night and your friend stands another mountain away from obstructions, you could c... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Free-space_optical_communication"
],
[
"http://en.wikipedia.org/wiki/Infrared_Data_Association"
]
] | |
3p7bxk | What happens to the cash/gold reserves of occupied countries in WW2? | I'm pretty curious with this, say after the Anschluss or the takeover of Czechoslovakia or after the various invasions in 1940s. What happened to the heaps of gold reserves and other financial assets those countries have? Did they just get 'acquired' by Germany during the occupation process?
Lastly if they did get ac... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3p7bxk/what_happens_to_the_cashgold_reserves_of_occupied/ | {
"a_id": [
"cw3s84a"
],
"score": [
6
],
"text": [
"I base part of this answer on [an earlier one on German pre-war and war spending here](_URL_2_).\n\nMost countries had a cold reserve, a reserve of hard currency and other items and would store it at a central bank. They often also had assets at ... | [] | [] | [
[
"http://rwhiston.wordpress.com/2012/01/11/13/",
"http://books.google.se/books?id=_-mCAlo6DroC&pg=PA8&lpg=PA8&dq=czechoslovak+gold+reserve+1939&source=bl&ots=UHtxtmJwsZ&sig=fvCoJ00emuIbCQih4tZ5e0euvBk&hl=en&sa=X&ei=TVPcUvXaOa_n4QTw2oGICg&ved=0CDIQ6AEwAg#v=onepage&... | |
mrqdf | Is it possible to produce viable offspring from two very different dog breeds? | e.g. a Great Dane and a Chihuahua. If the great dane female was artificially inseminated, would that work? I assume it wouldnt work the other way because great dane puppies in a chihuahua wouldnt make sense physically.
(in before "we mated a bulldog and a shitzu...") | askscience | http://www.reddit.com/r/askscience/comments/mrqdf/is_it_possible_to_produce_viable_offspring_from/ | {
"a_id": [
"c33bum8",
"c33bum8"
],
"score": [
2,
2
],
"text": [
"Yes, it happens all the time. I've seen puppies from a (male) dachshund and (female) St. Bernard before. Keep in mind that all dogs, regardless of breed, are still *canis lupus familiaris*, and as such, can produce offspri... | [] | [] | [
[],
[]
] | |
6yw2dr | if a child loses a limb, and it's successfully reattached, can the limb still grow? | I'm talking about something small, like a finger (but more than just the tip of the finger).
For example, if a child loses a whole finger in an accident, but then the finger is reattached, will the finger always remain the same size and appear deformed? Or is there any chance that it could grow as normal *after* bein... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6yw2dr/eli5_if_a_child_loses_a_limb_and_its_successfully/ | {
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"score": [
30,
8,
2,
2,
2
],
"text": [
"It depends on how clean the separation is, how the limb was preserved (cooled) and how skilled the surgeon is. It will never stop growing. If it is attached ... | [] | [] | [
[],
[],
[],
[],
[]
] | |
f29cld | Does copper IUD stop implantation of a fertilized egg? | For example, inserting a copper IUD when the egg is already fertilized with a sperm. Will the copper IUD stop the implantation to the uterus and therefore stop pregnancy? | askscience | https://www.reddit.com/r/askscience/comments/f29cld/does_copper_iud_stop_implantation_of_a_fertilized/ | {
"a_id": [
"fhcocks"
],
"score": [
9
],
"text": [
"The copper in the IUD serves as an pro-inflammatory agent. The inflammation prevents proper proliferation and physiologic functioning of the endometrium, which is required for the implantation of the fertilized egg. The fertilized egg therefore r... | [] | [] | [
[
"https://www.contraceptionjournal.org/article/S0010-7824(07)00081-9/fulltext"
]
] | |
1asomk | Just how aggressive are wasps? | I've grown up under the assumption that wasps are one of the most aggressive species that humans will regularly come into contact with. However, there are two large wasps nests in my backyard, one of which we didn't realise existed until we spotted it along a common walkway where we would come within less than a metre ... | askscience | http://www.reddit.com/r/askscience/comments/1asomk/just_how_aggressive_are_wasps/ | {
"a_id": [
"c90er8q"
],
"score": [
2
],
"text": [
"Regular paper wasps aren't really that aggressive. Don't bother their nest and they won't bother you. Africanized bees and hornets are much more aggressive. "
]
} | [] | [] | [
[]
] | |
1abiwj | Is friction a point force or distributed force? | askscience | http://www.reddit.com/r/askscience/comments/1abiwj/is_friction_a_point_force_or_distributed_force/ | {
"a_id": [
"c8vuikj",
"c8vw0nr",
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"score": [
11,
3,
4
],
"text": [
"Can you go into more detail on why you would ask this? In theory friction is the result of tiny defects in surfaces gripping each other, so it is a distribution of point forces. However, it is even eno... | [] | [] | [
[],
[],
[]
] | ||
67klvz | why are some businesses classified as "non-profit," but are clearly wildly profitable based on their executive's salaries? | A good example would be organ and tissue recovery facilities around the U.S. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/67klvz/eli5_why_are_some_businesses_classified_as/ | {
"a_id": [
"dgr4kz2",
"dgr4qc0",
"dgr5ha4"
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"score": [
10,
8,
13
],
"text": [
"Executive salaries are a cost of business, not a profit. If you want good executives you need to pay for them.",
"To be a nonprofit, you spend what you bring in, meaning there are no retained earn... | [] | [] | [
[],
[],
[]
] | |
umu6g | How has the baptist denomination evolved within the United States from the beginning of independence to the present? | I just read [these](_URL_0_) letters between the Connecticut Baptist Association and Thomas Jefferson, and find the Church's opinion to be astoundingly different compared to what modern baptists would believe. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/umu6g/how_has_the_baptist_denomination_evolved_within/ | {
"a_id": [
"c4wrtp7",
"c4wtdt8"
],
"score": [
10,
2
],
"text": [
"I'm on my phone atm, so can't give a comprehensive reply, but I'll give the short answer now.\n\nBaptism then still considered itself an outsider branch of Christianity. The ostracism that Baptists faced in the UK was still... | [] | [
"http://en.wikisource.org/wiki/Letter_to_the_Danbury_Baptists_-_January_1,_1802"
] | [
[
"http://www.sbc.net/resolutions/amResolution.asp?ID=907",
"www.sbc.net",
"http://www.sbc.net/resolutions/amResolution.asp?ID=914",
"http://www.sbc.net/resolutions/AMResSearchAction.asp?SortYearBy=DESC&DisplayRows=20&Submit=Sort+Again&frmdata=rlgslbrty&SearchBy=Subject",
"http:/... | |
dnx06p | how does the internet exist? no i'm not talking about us using it but more so, what's actually causing it to run and who's in charge, who could possibly end it? | Edit * WOW 700 VIEWS, THANKS SO MUCH.. PS. I didn't know I could write in this box! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dnx06p/eli5_how_does_the_internet_exist_no_im_not/ | {
"a_id": [
"f5h44j4",
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"f5i71fj",
"f5ib2m5",
"f5if9es",
"f5ijemr",
"f5ilcwr",
"f5ipt1t",
"f5itqgm",
"f5j0gby",
"f5j3uh8",
"f5jbwbk",
"f5jeb9l",
"f5jk5ni",
"f5jl8xd",
"f5jlcrz",
"f5jqav0",
"f5jto2z",
"f5kjg4d",
"f5kjgyu"
],
... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[
"Google.com"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
] | |
2k09hr | why is it that every time i am in a customer phone support menu that asks for my (acct., citation,order, etc.) # the first thing i have to do when the rep comes online is give them that exact same info. why ask for it if it doesn't show up? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2k09hr/eli5why_is_it_that_every_time_i_am_in_a_customer/ | {
"a_id": [
"clgohh9"
],
"score": [
3
],
"text": [
"Sometimes it's as dumb as you suggest, but most of the time it's a form of two-factor authentication. The system asks for your account number, and then the rep on the other hand has that account open. Then the rep will ask for the account number ... | [] | [] | [
[]
] | ||
1nh6d0 | why is my facial hair darker than my head hair? | I have had people ask if I colored my hair because my beard is darker than sin, but my head hair is noticeable lighter.
Beard=black as a coal mine.
Head=medium brown | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1nh6d0/eli5_why_is_my_facial_hair_darker_than_my_head/ | {
"a_id": [
"ccio39z",
"ccipqat"
],
"score": [
9,
8
],
"text": [
"Im a blonde and my beard grows in a nice deep red..just genetics",
"Mine is dark brown on top of my head, nearly white eyebrows, carrot top red goatee/beard, and blonde body hair. I just assume my mom slept with a calico... | [] | [] | [
[],
[]
] | |
3iev8y | Couldn't the cure for cancer be no cure at all? | Cancer is a result of bad genes resulting in uncontrollable multiplying cells. By treating cancer we are selecting for cancerous genes to continue. Since it's genetic, if we stopped treating people with cancer wouldn't it eventually just stop happening?
(I understand this is ethically wrong, just curious as to whether... | askscience | https://www.reddit.com/r/askscience/comments/3iev8y/couldnt_the_cure_for_cancer_be_no_cure_at_all/ | {
"a_id": [
"cug4bzj",
"cug892y",
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],
"score": [
11,
9,
2
],
"text": [
"The problem is that cancer typically strikes late in life. \nIf something happens post-reproduction then it's invisible to selection. What that means is that selection acts on differential reproducti... | [] | [] | [
[],
[],
[]
] | |
pzj5w | Why does caffeine cause jitteriness in some people? From what I understand, caffeine doesn't "wake you up", it just affects the binding of adenosine thereby -Preventing- sleepiness. | Sorry if I've mixed up some science here. Thanks! | askscience | http://www.reddit.com/r/askscience/comments/pzj5w/why_does_caffeine_cause_jitteriness_in_some/ | {
"a_id": [
"c3tij9w",
"c3tirps",
"c3tlbih"
],
"score": [
6,
2,
2
],
"text": [
"Caffeine does both effects, a quick google search has all the answers. \n\nFrom the top google result we have....\n\n_URL_0_\n\n > So, How Does Caffeine Affect Adenosine and Sleepiness?\n\n > Caffeine... | [] | [] | [
[
"http://www.psych.umn.edu/courses/spring05/dionisiod/psy3061/caffeine.htm"
],
[
"http://en.wikipedia.org/wiki/Parkinson%27s_disease",
"http://onlinelibrary.wiley.com/doi/10.1111/j.1471-4159.2007.05196.x/full"
],
[
"theoatmeal.com",
"http://theoatmeal.com/comics/coffee"
]
] | |
eje68p | this is a delicate subject so i’ll start with this is not intended to hurt feelings or be disrespectful. why if you say something against a person solely based on ethnicity is it called racism, unless that person is jewish, what exactly does anti-semitic mean? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eje68p/eli5_this_is_a_delicate_subject_so_ill_start_with/ | {
"a_id": [
"fcx5008"
],
"score": [
3
],
"text": [
"The TL:DR is that Judaism has roots in a religious movement, as opposed to a purely race concept so it’s a clearer label to make everyone aware of exactly who you’re trying to insult.\n\nThat’s a very short wrap up, but make no mistake. Being ant... | [] | [] | [
[]
] | ||
777iw9 | Why can I see the "shadow" of a gas from a ground vent, but I can't see anything in the air? | If there is a shadow, then doesn't that imply some amount of sun light bouncing off of the gas? | askscience | https://www.reddit.com/r/askscience/comments/777iw9/why_can_i_see_the_shadow_of_a_gas_from_a_ground/ | {
"a_id": [
"dokcb2p",
"dokvups"
],
"score": [
5,
2
],
"text": [
"Not bouncing, no. The light is being refracted (not to be confused with reflected) as it changes from one medium to another, though some amount may be absorbed. The same effect can be seen if you put part of a pencil in a gl... | [] | [] | [
[],
[]
] | |
6w0vey | why can foods be too salty, sweet, sour, bitter, and spicy, but not too savory? | I'm sure everyone's experienced foods that have been too salty or too sweet or too sour or too bitter, but I've never eaten a food and thought that it was "too savory/umami". Why is that the case? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6w0vey/eli5_why_can_foods_be_too_salty_sweet_sour_bitter/ | {
"a_id": [
"dm4hicw",
"dm4iya7",
"dm4ja0j"
],
"score": [
17,
3,
3
],
"text": [
"Go get a big ol' chunk of Parmigiano-Reggiano. Not crappy pre-grated 70% cellulose parmesan, the real stuff. \n\nNow grate a cup or two of that. \n\nNow eat it all at once. Just shove as much of it in ... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/Monosodium_glutamate"
]
] |
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