q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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wdppu | Liquid Crystals, how do they change color? | This is a repost from r/physics, as this reddit doesn't accept links, I'll just post the text.
If you look at liquid crystals in things like moodrings and LCthermometers then you will notice that they can change color when heated.
Now I have looked on the internet and found that it has to do with the The cholesteric ... | askscience | http://www.reddit.com/r/askscience/comments/wdppu/liquid_crystals_how_do_they_change_color/ | {
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"In lieu of other responses, I'll give my interpretation of what's physically going on here:\n\nIt is not one polariser in all directions, but rather a lattice of polarisers with a spatial period of P. When there is a distanc... | [] | [
"http://www.battlesnake.co.uk/_uni/lcd_files/image006.gif",
"http://plc.cwru.edu/tutorial/enhanced/files/lc/phase/Graphics%5Cschem.BMP"
] | [
[],
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"http://dx.doi.org/10.1021/ed082p1360A"
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2bvwl3 | the "market basket" situation | Could someone please explain what is going on with the boycott of the Market Basket supermarket chain? I feel lost as to how it got this point.
Thanks | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2bvwl3/eli5_the_market_basket_situation/ | {
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"Essentially the store is owned by the Demoulas family. It was started in 1906 in lowell and has grown to 71 stores since then. The original family sold it to their sons George and Telamachus (Mike) Demoulas for 15k. They own... | [] | [] | [
[
"http://www.eagletribune.com/local/x1927887999/Arthur-vs-Arthur?zc_p=0"
],
[]
] | |
6937z9 | If a person is right-handed, does such dominance include all voluntary muscles? For example, are the muscles in the larynx also somewhat right-dominant? | askscience | https://www.reddit.com/r/askscience/comments/6937z9/if_a_person_is_righthanded_does_such_dominance/ | {
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"Yes. The entire side of the body is both better developed and more dextrous.\n\nTrivia - one leg's stride is a little longer than the other. Because of this, people in a flat desert, with no referent to direction, who thi... | [] | [] | [
[],
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] | ||
2u2f3t | Was John the Baptist an Essene? How did he fit into the religious landscape of his time? | There are some similarities between John the Baptist and the Essences - ritual bathing (common at the time), living in the desert, apocalyptic theology. Are these superficial? How common were these features at the time (especially apocalyptic theology)? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2u2f3t/was_john_the_baptist_an_essene_how_did_he_fit/ | {
"a_id": [
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"Wow, I literally just went over this yesterday in my Bible history course. Ok, here we go.\n\nIf you look at Luke 1:7, you see that John's mother was barren, so she could be taken as elderly and his father was called a righteous man in an age wh... | [] | [] | [
[]
] | |
g32rdn | Why were the Ottomans accepted as caliphs? | From what I understand the ottomans gained the title after defeating the mamlulks. But again from what I understand the caliph is supposed to be a male descendant of Muhammad and I don't think the Turkish ottomans have any geneologic ties to the Prophet. How is it then that the Islamic world just accepted the new Calip... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/g32rdn/why_were_the_ottomans_accepted_as_caliphs/ | {
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"This is precisely the question Lawrence of Arabia and the British intelligence services asked themselves during the WW1!\n\nSomeone with more knowledge on the history of Arabs under the Ottoman Empire might provide a more detailed story. What I ... | [] | [] | [
[
"https://islamansiklopedisi.org.tr/hilafet"
]
] | |
1x09t4 | Is there evidence of African-Americans during the Civil Rights Movement who believed the supposed "biblical support" whites used to oppress them? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1x09t4/is_there_evidence_of_africanamericans_during_the/ | {
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"text": [
"The Jews did hold slaves themselves and the story of Ham was a mythological justification of the enslavement of Canaanites^1 . \n\nModern Christian slavers added only one particular detail to that myth: Ham was made brown^2 . This name (חם) was c... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Hamitic_League_of_the_World"
]
] | ||
8ajfuq | why can’t the cold sore virus be cured permanently? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8ajfuq/eli5_why_cant_the_cold_sore_virus_be_cured/ | {
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"It’s hard to combat viruses. They attack your cells and can easily replicate once a cell replicates. It’s hard to attack them since they are relatively smaller than the cells themselves. There are medic... | [] | [] | [
[],
[
"https://www.reuters.com/article/us-herpes-treatment/new-approach-offers-chance-to-finally-kill-herpes-idUSN0229815620080702",
"http://arrafunding.uchicago.edu/news/feature_roizman.shtml"
],
[]
] | ||
imwh8 | Why does failing to fully drain a laptop battery "condition" it to having a smaller lifespan? | askscience | http://www.reddit.com/r/askscience/comments/imwh8/why_does_failing_to_fully_drain_a_laptop_battery/ | {
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"What? No, full discharge and charge cycles cause a smaller lifespan. \n\nA shorter lifespan is due to the volume change of the cathode material during charge and discharge cycles causing microstructure fracture. A standard... | [] | [] | [
[],
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] | ||
3b2ie6 | Does child sex abuse has any correlation/causation effect on homo/bisexuality ? | Hey AskScience, I have a question for you.
I've always heard about people that where abused sexually as children and are not "straight", but I've never seen any study statistically correlating sex abuse and non-heterosexuality.
Not trying to get "proof that every gay was abused" here. Quite the opposite. I wanna fin... | askscience | http://www.reddit.com/r/askscience/comments/3b2ie6/does_child_sex_abuse_has_any_correlationcausation/ | {
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"It looks like there might be a few studies showing a correlation between the two, for example: _URL_0_\n\nHowever, I think it would be really hard to prove causation. It seems pretty likely that homosexuality or bisexuality would increase an in... | [] | [] | [
[
"http://jiv.sagepub.com/content/early/2013/01/20/0886260512471081.abstract"
]
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48urm6 | what is the nuclear proliferation treaty and why do india, pakistan and a few others refuse to sign it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/48urm6/eli5_what_is_the_nuclear_proliferation_treaty_and/ | {
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"In simple terms. Advanced countries limit their nuclear weapon stocks. Developing countries wont sign because they believe they have the right to the weapons... | [] | [] | [
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b8hyqv | How do governments tell the difference between nuclear launches and peaceful space missions? | This has two parts:
1) Governments monitor the launch of nuclear missiles. But there are rockets being shot into space all the time. How do they know that those rockets aren't carrying nuclear weapons.
2) Satellites are shot into space regularly. How do we know that they aren't hiding nuclear weapons? | askscience | https://www.reddit.com/r/askscience/comments/b8hyqv/how_do_governments_tell_the_difference_between/ | {
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"1. They don't know. Any unscheduled launch is considered a potential ICBM launch. This is why such things are actually publicly announced, even if payloads are classified.\n2. They don't know. Also there are some spacecraft... | [] | [] | [
[],
[]
] | |
15p8hg | Magnetic Moment mu~ IA | It's simple to understand the magnetic moment of a dipole (2qa) but why for a current loop or an electron sweeping out an area A is the moment = IA? Is there a nice way of understanding this? Why is the area and not the circumference of the loop? | askscience | http://www.reddit.com/r/askscience/comments/15p8hg/magnetic_moment_mu_ia/ | {
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"I don't have a full answer for your question, but consider the case of a current \"loop\" with a shape that constantly runs back along itself, to maximize its length in a given total area. Put this loop in a B-field. The for... | [] | [] | [
[],
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] | |
27p47k | why do many men's faces suddenly get puffy in their mid-20s and up? | Nothing like reconnecting with old high school friends to see that the women basically look the same (with some exceptions) but by-and-large the men have shockingly puffy faces, almost to the point of unrecognizability (some look like they got a bunch of bee stings in the face). These guys are not particularly overweig... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27p47k/eli5_why_do_many_mens_faces_suddenly_get_puffy_in/ | {
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"They are overweight. Their clothes are hiding their stomachs. But I know exactly what you mean about the puffy face. \n\nI'm assuming you're about 5-10 years out of high school. Wait till you're 15-20 ... | [] | [] | [
[],
[],
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] | |
8hb4lk | In Karl Marx's Lifetime, What Would He Have Recognized as Symbols of Communism? | Since the Hammer and Sickle was designed nearly a generation after his death, what would he have seen as representing Communism in posters, pictures, banners, and even graffiti? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8hb4lk/in_karl_marxs_lifetime_what_would_he_have/ | {
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"text": [
"1. RED FLAGS ▶ Red flags have been a symbol of revolutionary politics since the French revolution and as such weren't historically exclusive to socialism, but they became increasingly associated with socialism specifically following the 1871 up... | [] | [] | [
[]
] | |
2e9nli | What factors affect our circadian rhythm? When does our body clock form? How many body clocks do we have? | We all know light is the factor with the biggest impact. But research shows there are other factors too, such as, diet, sleep, exercise, social situations (deaths, injury of others etc.).
* How do these factors affect our circadian rhythm? Do some have a greater effect than others? Can you also provide sources for any... | askscience | http://www.reddit.com/r/askscience/comments/2e9nli/what_factors_affect_our_circadian_rhythm_when/ | {
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"text": [
"I think you would find this relevant and useful (once you get past the intro):\n\n_URL_1_\n\nIt deals largely with your last point.\n\nThe only other insight I can offer is that it... | [] | [] | [
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"https://www.isisonline.org.uk/how_babies_sleep/normal_sleep_development/",
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"http://www.ploscompbiol.org/article/info%3Adoi%2F10.1371%2Fjournal.pcbi.1002419",
"http... | |
5nt8db | how do services like square do 'instant deposits' to debit cards? what technology powers that? | I saw Square offers this feature, but it only works on 'some' debit cards. There is no explanation beyond that. What is the qualifying factor to make that happen? Chip vs no chip? Something else? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5nt8db/eli5_how_do_services_like_square_do_instant/ | {
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"text": [
"It's simply reverse debit. It's nothing special. When you return a product at certain stores they will ask you to swipe the card you used to buy it. Often times you can just swipe your debit card even if you bought it on a different credit car... | [] | [] | [
[]
] | |
2icqiy | german sentence structure | I have researched it but I don't fully understand the format as in where what words go where in multiple positions. I thought maybe a ELI5 version would benefit me instead. Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2icqiy/eli5_german_sentence_structure/ | {
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"German, like other languages such as Latin, doesn't structure it's sentences to give the words their meaning. Where English uses the position of a word to appoint it's grammatical function in a sentence, German uses Grammatical cases (_URL_0_). I... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Grammatical_case"
]
] | |
19yz9h | anxiety disorders | What sort of things trigger attacks? What does it feel like to have an anxiety attack? How long do the attacks usually last? How does the person feel after an attack?
Also, what causes anxiety disorder? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/19yz9h/eli5_anxiety_disorders/ | {
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"I have generalized anxiety disorder so I hope I can answer your questions to your liking. \n\nPanic attacks are a... | [] | [] | [
[],
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3kcfmf | why are i.q. tests used as the primary standard for gauging intelligence? | Many IQ tests that I've seen really just boil down to pattern recognition, which is kind of a problem since intelligence isn't concretely defined by psychologists/neurologists anyway (that is to say, recognizing patterns isn't the only way to be intelligent). Yet when we think of someone as a genius, we say or think "T... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3kcfmf/eli5_why_are_iq_tests_used_as_the_primary/ | {
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"Pattern recognition is a very important part of intelligence. IQ tests do involve much more than that. As for why we use them... it's because we haven't reall... | [] | [] | [
[],
[],
[],
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] | |
4mzywe | why is it flooding everywhere? | Texas forever, Mississippi, Vegas, Louisiana, and Oklahoma have already had notable flooding this year. Whats going on? Is a certain amount of flooding per year normal? Is this more than normal? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4mzywe/eli5_why_is_it_flooding_everywhere/ | {
"a_id": [
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"text": [
"A certain amount of periodic flooding is normal. However, as global warming continues, more ice is melting, and there is therefore more liquid water around, which means there will be more rain, more snow, larger storms, and ... | [] | [] | [
[],
[]
] | |
fhepw | How do the blood vessels in the bottom of your feet not get crushed? | Is blood pressure high enough that they stay open? Or do we fidget enough that they only get blocked occasionally? | askscience | http://www.reddit.com/r/askscience/comments/fhepw/how_do_the_blood_vessels_in_the_bottom_of_your/ | {
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"text": [
"The veins *return* blood to the heart, and operate on a low pressure system that is assisted by movement of your body and muscles, \"s... | [] | [] | [
[],
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"http://jap.physiology.org/content/94/1/38.full",
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69osq7 | why do humans have such long life cycles compared to most animals. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/69osq7/eli5_why_do_humans_have_such_long_life_cycles/ | {
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"text": [
"Idk if 'most animals' is accurate, but I guess it's relative. Lots of turtles, parrots, b... | [] | [] | [
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46xye3 | Did the Nazis ever desecrate or destroy WW I memorials? | Just read a blurb about France granting Canadians a place at Vimy Ridge, forever. That was in 1922. Did advancing German armies in WWII ever purposely destroy monuments or memorials to allied soldiers? Did the allies ever do anything similar? I know stuff happens, in war, but I mean purposeful destruction. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/46xye3/did_the_nazis_ever_desecrate_or_destroy_ww_i/ | {
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"text": [
"You may be interested in past posts on this topic:\n\n* [_How were the WWI battlefields/memorials treated in the lead up to, outbreak of and conclusion of WWII?_](_URL_1_) \n^(08 Jun 2015 | 6 comments)... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3935fn/how_were_the_wwi_battlefieldsmemorials_treated_in/crzyfju",
"https://www.reddit.com/r/AskHistorians/comments/3935fn/how_were_the_wwi_battlefieldsmemorials_treated_in/",
"https://www.reddit.com/r/AskHistorians/comments/3935fn/how_were_the_wwi_batt... | |
1v8jgs | how a complex operating system (like ubuntu) can run on a 2gb usb | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1v8jgs/eli5_how_a_complex_operating_system_like_ubuntu/ | {
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"text": [
"It doesn't \"run\" on the 2 GB USB. The USB acts in the same way that your hard drive works for Windows. \n\nWhen you boot in Linux, the bulk of the processes needed to run Linux are loaded from the USB into your RAM. From t... | [] | [] | [
[],
[]
] | ||
7n47ku | On an economic scale, how effective was unrestricted submarine warfare by Germany in WW1? | I'm curious if unrestricted sub warfare was very effective in WW1 in terms of damage to the trade/economy of the allied countries, given that it was halted and restarted multiple times, and there were obvious political concerns with the move as well. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7n47ku/on_an_economic_scale_how_effective_was/ | {
"a_id": [
"drzygxc"
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"score": [
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"text": [
"In short: It failed to be effective enough.\n\nUSW (Unrestricted Submarine Warfare) did cause damage to the economy of the Entente. It fell short of its aims and was not effective enough to strangle Britain out of the war. Additionally it was ... | [] | [] | [
[]
] | |
1t93zy | why doesn't the topical application of disinfectants like alcohol select for resistance the way using antibiotic or antibacterial agents can? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1t93zy/eli5why_doesnt_the_topical_application_of/ | {
"a_id": [
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"score": [
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"text": [
"Because alcohol kills everything. It's not possible for a microorganism to be resistant to alcohol. Alcohol is a tiny molecule that competes with water. Consequently, it's a dehydrating agent. Nothing can survive being catastrophically dehydrated... | [] | [] | [
[]
] | ||
loyqv | Why do paramedics wrap newborn babies in foil? | askscience | http://www.reddit.com/r/askscience/comments/loyqv/why_do_paramedics_wrap_newborn_babies_in_foil/ | {
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"text": [
"To keep them warm. The foil reflects the [infrared radiation](_URL_0_) from the baby.",
"New borns will lose heat much faster then an adult\n1. Larger surface area to weig... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law"
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[],
[
"http://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law"
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6n3l9k | why do people get red when they are hot? why does the area around the mouth and eyes turn white when they are about to have a heat stroke? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6n3l9k/eli5_why_do_people_get_red_when_they_are_hot_why/ | {
"a_id": [
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"text": [
"Bloodflow, blood is expanding the capillaries (blood vessels near the skin) to increase heat exchange. This causes changes in what blood is where in SEVERE SEVERE SEVERE case, because more blood is right on the surface. Eventually your body goes ... | [] | [] | [
[
"http://www.emsaonline.com/mediacenter/articles/00000166.html"
]
] | ||
76bfhk | What happened to the vast quantities of personal possessions and jewellery taken from Holocaust victims and stockpiled by the Nazis after they were discovered by the Allies? | A post over at r/historyporn of wedding bands taken from Holocaust victims got me asking what happened to the large quantities of wedding rings, jewellery, clothing, shoes etc that the Nazis stockpiled? I know some are on display as part of memorials and museums but that can’t account for all of it surely. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/76bfhk/what_happened_to_the_vast_quantities_of_personal/ | {
"a_id": [
"docrmdz"
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"text": [
"So, the answer of this questions heavily depends on the when, how, and who, as so many things in history. Also, it needs some contextualization in terms of what happened to the personal possessions before they were liberated by the Allies along ... | [] | [] | [
[
"http://www.express.co.uk/news/world/678028/16-000-belongings-of-Nazi-concentration-camp-victims-discovered"
]
] | |
30rr42 | why is raw salmon considered "safe to eat" | My parents gave me raw salmon for dinner and I wondered why it's safe to eat. I mean it's raw that means you should cook it first before ingesting it right? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/30rr42/eli5why_is_raw_salmon_considered_safe_to_eat/ | {
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"text": [
"In general, actually, raw salmon is NOT safe to eat. It is only safe if it has been frozen to certain specifications, below a certain temperature for a period of time. Salmon tend... | [] | [] | [
[],
[],
[],
[
"http://www.eatsushi.com/article.asp?X=628"
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] | |
f5tsj0 | The story I was fed growing up says WW1 was won because the American’s came and saved the entente. How true is that narrative? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/f5tsj0/the_story_i_was_fed_growing_up_says_ww1_was_won/ | {
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"text": [
"An answer by /u/Khenghis_Ghan in [this](_URL_0_) thread may be of interest to you."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/b8m320/what_impact_did_the_united_states_really_have_in/"
]
] | ||
q80ig | Could a computer program be designed to 'evolve'? | Could code be written complex enough to allow for cumulative selection that, over time, encouraged the development of artificial intelligence? | askscience | http://www.reddit.com/r/askscience/comments/q80ig/could_a_computer_program_be_designed_to_evolve/ | {
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"Kind of, yes. But it's not about complexity, it's about a particular structure. The field is called [Genetic Programming](_URL_0_). The idea is you write a program which simulates evolution, but instead... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Genetic_programming"
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[],
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"http://www.sussex.ac.uk/Users/adrianth/ascot/paper/paper.html",
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1rzpkl | How did the writings of ancient philosophers, such as Aristotle or Confucius, survive to be read today? | I have been reading Nicomachean Ethics and I began to wonder how it arrived at its present form. As a side question, I am curious as to how accurate their modern writings are considered to be. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1rzpkl/how_did_the_writings_of_ancient_philosophers_such/ | {
"a_id": [
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"text": [
"Deja vu? You already asked the exact same question earlier: _URL_0_ \n\nIt would behoove you to at least explain why you're reposting it, if you were dissatisfied with the earlier responses. ",
"Original works from pr... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1ryr1l/how_did_the_writings_of_ancient_philosophers_such/"
],
[]
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4kuorr | why do electronic artists still need tonnes of equipment? why can't a computer produce all the sound design they need? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4kuorr/eli5_why_do_electronic_artists_still_need_tonnes/ | {
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"Theoretically it can, its just very difficult, inefficient. And time consuming. While you can program each note into the computer its much easier to just use a midi keyboard.",
"Another thing that'... | [] | [] | [
[],
[],
[]
] | |
2uym6z | What is the exact value of Avogadro Constant? | Considering that it is a 24 digit integer (6.022 X 10^23), it is not like the value of Pi.
Everywhere I looked, I was just able to find the value to some approximation. Is the exact value even determinable/known? | askscience | http://www.reddit.com/r/askscience/comments/2uym6z/what_is_the_exact_value_of_avogadro_constant/ | {
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"The value is determined by our definition, and since we defined it with respect to carbon-12 in their ground state, the precision we can measure it to is limited by our instruments. \n\nCurrently, we don't have an exact value because our equipmen... | [] | [] | [
[]
] | |
45ag8j | since i live in a country, state, and city with modern waste water treatment facilities, how is running water while shaving, brushing teeth, showering, ect. wasting water? | Isn't water reclaimed, treated and reused? Since it is not destroyed (by changing states) can it truly be wasted? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/45ag8j/eli5_since_i_live_in_a_country_state_and_city/ | {
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1jafvz | the relationship between andrew carnegie, john rockefeller and jp morgan | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jafvz/eli5_the_relationship_between_andrew_carnegie/ | {
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"#1 They were all insanely rich. As in, for their time, their wealth would trump that of Bill Gates. \n\n#2 They pushed forward major industries of the U.S. \n* Andrew Carnegie owned most if not all the steel industry\n* The same goes for Rockefel... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Robber_baron_(industrialist)"
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cyywr1 | why is chemistry branched into organic and inorganic? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cyywr1/eli5_why_is_chemistry_branched_into_organic_and/ | {
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"text": [
"Organic chemistry, or chemistry of Carbon, is so complex that it has as much or even more variety than all other chemicals combined. It's so complex that you basically spend an entire career just being an expert in Carbon-b... | [] | [] | [
[],
[]
] | ||
17dw2g | Does Opera have any origin in ancient Greek/Roman theatre? Or is it a creation of the Renaissance? | The Wiki entry on the [origin of Opera](_URL_0_) says:
> [It was] an attempt to revive the classical Greek drama, part of the
> wider revival of antiquity characteristic of the Renaissance. The
> members of the Camerata considered that the "chorus" parts of Greek
> dramas were originally sung, and possibly eve... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17dw2g/does_opera_have_any_origin_in_ancient_greekroman/ | {
"a_id": [
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"text": [
"Yes, but the singing was more of an interruption of the action than in modern opera. Aristophanes makes fun of Euripides for having to many solos in his plays. Source: Oxford Classical Dictionary \"Tragedy, Greek.\" ",
"... | [] | [
"http://en.wikipedia.org/wiki/Origins_of_opera"
] | [
[],
[]
] | |
213yvg | Even though Jurrasic Park is fictional, is the science possible to make extinct animals alive once again using extremely old DNA? | How would it work?
Does DNA go bad?
What would be the errors in creating extinct animals? | askscience | http://www.reddit.com/r/askscience/comments/213yvg/even_though_jurrasic_park_is_fictional_is_the/ | {
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"The half-life of DNA is such that you'd never get a decent enough sample of a dinosaur to clone it. A mammoth though? Sure.\n\nAssuming we did, by sheer dumb luck, somehow find a ... | [] | [] | [
[],
[
"http://www.isciencetimes.com/articles/6946/20140313/woolly-mammoth-dna-cloning-elephant-clone.htm"
],
[
"http://www.history.com/news/the-revival-of-the-passenger-pigeon",
"http://www.livescience.com/27939-reviving-extinct-animals-mammoths.html"
],
[]
] | |
38aki4 | why are cable companies constantly trying to push their home phone service? most people already have cell phones and it sounds like an added burden to their existing infrastructure. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/38aki4/eli5_why_are_cable_companies_constantly_trying_to/ | {
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"text": [
"Money, if they can make $10/mo off of landline service, why not? \n \n > added burden to their existing infrastructure \n \nWhat burden would it create? Adding landlines aren'... | [] | [] | [
[],
[],
[],
[]
] | ||
3046lj | Why were porcelain products so valued in Europe when they were essentially just eating or drinking utensils? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3046lj/why_were_porcelain_products_so_valued_in_europe/ | {
"a_id": [
"cppjaxs"
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"text": [
"A big part of this is that people don't consider things from a purely functional perspective. Yes, ultimately a porcelain bowl and a majolica bowl from Europe serve the same functional purpose, but they can have different social meanings. Two of ... | [] | [] | [
[]
] | ||
7itvzc | Given the Nazis' views on homosexuality, how did the openly gay Ernst Röhm become the leader of 3,000,000 Nazi "Brownshirts" in the Sturmabteilung? | 1930s perception of homosexuality was quite negative. In that era, then, how did Ernst Röhm become leader of the NSDAP's far-right paramilitary, which one would assume would be even more extreme than the overall population? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7itvzc/given_the_nazis_views_on_homosexuality_how_did/ | {
"a_id": [
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"Rohm himself had co-founded the SA (so he didn't \"become\" its leader in that sense but rather began in its leadership from day one), he had taken a leading role in the Beer Hall Putsch and was a close friend of Hitler fr... | [] | [] | [
[
"https://www.jewishvirtuallibrary.org/homosexuals-and-the-third-reich"
],
[]
] | |
5zlmuc | why do some people smell burnt toast before/during a heart attack? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5zlmuc/eli5_why_do_some_people_smell_burnt_toast/ | {
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"text": [
"1. You're thinking of a stroke, not a heart attack.\n2. While smelling burnt toast is a popular example, it's only that, an example. It's meant to illustrate the point that a person having a stroke can sometimes experience strange, very specific... | [] | [] | [
[]
] | ||
2eifb8 | why does pointing a fan outside work better for cooling a room down? | As opposed to pointing it inside, which always seems to feel better. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2eifb8/eli5_why_does_pointing_a_fan_outside_work_better/ | {
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"text": [
"It's easier to pull air out of a room than it is to try and push more in. You're fighting turbulence the fan creates and air pressure when pushing air into the room.\n\nYou're als... | [] | [] | [
[],
[],
[],
[]
] | |
2cf7mw | what is holding us back from developing a tire that does not need air and thus can't get a flat? | Edit: I was referring to car tires for those asking. Also, courtesy of /u/Schnutzel, it looks like they are currently a work in progress and the technical challenge that we are still facing is:
"Airless tires generally have higher rolling resistance and provide much less suspension than similarly shaped and sized pne... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2cf7mw/eli5_what_is_holding_us_back_from_developing_a/ | {
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[],
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"http://airless-tire.com/wp-content/uploads/2012/10/TweelAudi02-1024x682.jpg"
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"http://www.gizmag.com/reinventing-the-wheel--the-airless-tire/10398/"
],
[
"http://www.goodyear.ca/en-CA/tires/category/run-flat"... | |
pzf8t | The Moon is spiraling away from Earth at an average rate of 3.8 cm per year, so when it was formed it would have been much closer to Earth. Does it follow that tides would have been greater earlier in Earth's history? If so how large? | askscience | http://www.reddit.com/r/askscience/comments/pzf8t/the_moon_is_spiraling_away_from_earth_at_an/ | {
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[],
[],
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"http://en.wikipedia.org/wiki/Giant_impact_hypothesis",
"http://large.stanford.edu/courses/2007... | ||
82ytm4 | what are tariffs and why are people upset that the president wants to impose them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/82ytm4/eli5_what_are_tariffs_and_why_are_people_upset/ | {
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"Tariffs are just taxes on imports. When another country wants to sell their product domestically, we can tax them when the import that product for sale.\n\nThe current POTUS wants them because he feel... | [] | [] | [
[],
[],
[]
] | ||
2tycir | What kind of casus belli did the romans use? | Did they use any for the more "primitive states"/tribes or did they need a reason at all? Did they even conduct any sort of advanced diplomacy with tribes? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2tycir/what_kind_of_casus_belli_did_the_romans_use/ | {
"a_id": [
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"Julius Caesar goes in great detail about his reasons for going to war in his book \"Commentarii de Bello Gallico\". As it was written by Caesar himself, it may be a bit biased, but at least it gives a insight into how the Romans viewed their rea... | [] | [] | [
[]
] | |
8owwfe | why is haggling commonplace at the car dealership but not at other stores? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8owwfe/eli5_why_is_haggling_commonplace_at_the_car/ | {
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"Large ticket items like this are usually where the most negotiating happens. Same as buying a house, boat or RV. The sales model of dealerships lends itself to negotiation. \n\nP... | [] | [] | [
[],
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[],
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84ctmq | We're medieval peasants given weapons to go to war? | So, say I'm a peasant in the early years of the Hundred Years War, and I don't make enough money to afford my own spear, if my lord called to war, would he provide me with a spear, or would I be going to battle with just my fists? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/84ctmq/were_medieval_peasants_given_weapons_to_go_to_war/ | {
"a_id": [
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"Neither. You wouldn't go to war without a weapon of your own. Contrary to popular folklore, medieval armies weren't made up of peasant farmers armed with farming implements but by semi-professional soldiers who provided their own weapons and armo... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/41asy8/what_would_be_the_typical_armour_weapons_carried/",
"https://www.reddit.com/r/AskHistorians/comments/3ksfpi/what_happened_to_a_squire_after_their_knight_died/cv0fsux/?context=3"
]
] | |
ewzdmb | is there a limit to how much food we can process? | Assuming someone eating standard portions normally, is there a limit of how much food they can absorb? For example, if they eat to their physical limit every hour throughout one day or longer, (without throwing up) will some food essentially pass through almost undigested (without body actually getting much out of it),... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ewzdmb/eli5_is_there_a_limit_to_how_much_food_we_can/ | {
"a_id": [
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"text": [
"Your body is really good at extracting nutrition. Your gut can slow down movement and take it's sweet time. Most people won't be able to eat enough regular food to actual shit out significant amounts of unabsorbed nutrition. The only real exce... | [] | [] | [
[]
] | |
3y8lir | why has there been a vinyl resurgence in the music industry? | What's the deal with vinyl records making a comeback? I feel old when I say that I don't really "get it." But, as a music lover, why should I care? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3y8lir/eli5_why_has_there_been_a_vinyl_resurgence_in_the/ | {
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"It's making a small resurgence, nothing big. In terms of being a music lover, the only \"benefit\" vinyl has is the sound of vinyl pl... | [] | [] | [
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"https://m.imgur.com/a/9QvVO"
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"http://www.needledoctor.com/Clearaudio-Goldfinger-Statement-Phono-Cartridge"
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[]
] | |
1b1tt3 | Does a gas bubble increase in volume when it touches the wall of a container? | I noticed the bubbles on the side of a soda bottle look larger than the bubbles rising to the surface, is there any explanation why this is? | askscience | http://www.reddit.com/r/askscience/comments/1b1tt3/does_a_gas_bubble_increase_in_volume_when_it/ | {
"a_id": [
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"text": [
"A sphere is a volume with the smallest surface area to volume ratio. A bubble that is in contact is minimizing its surface energy by reaching equilibrium with the container interface, \"wetting\" it a certain degree. Minimally, it does not attach... | [] | [] | [
[]
] | |
2vts79 | what would the short term consequences be (up to a few years) if the united states ended all corn subsidies? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vts79/eli5_what_would_the_short_term_consequences_be_up/ | {
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"text": [
"Corn and corn syrup based produces (which are a lot of different products) would get a bit more expensive. And maybe some percentage of the corn crop was changed to grow something else that was more profitable."
]
} | [] | [] | [
[]
] | ||
1p04f4 | The year is ~1 A.D. Let's pretend a tribe in Northern France is causing Rome issues. How long does it take to march a legion there from Rome? | This is all going under the assumption they even would do that. They probably would have local forces around. But can we assume the local forces were too small to handle the threat/uprising/etc... The heart of the question is, if needed, how long would it take to march an army from Rome to Northern France. (But that's ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1p04f4/the_year_is_1_ad_lets_pretend_a_tribe_in_northern/ | {
"a_id": [
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"text": [
"I know this doesn't completely answer your question, but I think you are going to find this map put together by Stanford university to be a lot of fun. It basically shows the ancient Roman routes and travel times for anywhere in the empire. _UR... | [] | [] | [
[
"http://orbis.stanford.edu/#mapping"
]
] | |
696mv5 | How do third party headphones with volume control and play/pause buttons send a signal to my phone through a headphone jack? | I assume there's an industry standard, and if so who is the governing body to make that decision? | askscience | https://www.reddit.com/r/askscience/comments/696mv5/how_do_third_party_headphones_with_volume_control/ | {
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"You will notice that there are three small rings around the ... | [] | [] | [
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"http://www.circuitbasics.com/wp-content/uploads/2015/03/TRRS-Wiring-Diagram-300x224.png"
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"https://source.android.com/devices/accessories/headset/plug-headset-spec"
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3ud3qx | why isn't cannibalism more common in extremely poor regions? | I'll start off saying I'm not supporting the idea of cannibalism. But I was thinking, in regions full of turmoil/extreme poverty, where people are consistently starving to death, why isn't cannibalism more of an issue?
I know there's a huge difference between humans and all other animal species, but a lot of meat-eati... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ud3qx/eli5_why_isnt_cannibalism_more_common_in/ | {
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"Cannibalism is often associated with rites and rituals--eating the heart or liver of a d... | [] | [] | [
[],
[],
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218twx | why are sites displaying "pre-teen modeling" not taken down for child pornography? | I found out that these exist through a local news article and I wanted to know why these sites are still up? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/218twx/eli5_why_are_sites_displaying_preteen_modeling/ | {
"a_id": [
"cgap6i8",
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"score": [
14,
11
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"text": [
"Child pornography and pre-teen modeling aren't the same thing....\n\nLittle kids in pageants are pre-teen models -- they're not naked or having sex, so it's not child pornography.",
"Because they're not pornography. C... | [] | [] | [
[],
[]
] | |
24r20z | How did steppe peoples gather metal? | When reading history that involves people from the Steppe, Mongols, Huns, Xiongnu (I hope I'm spelling that right lol) etc. one question always pops up in my head; If they were nomadic pastoralists, how did they gather metal?
Would they have time to manage a mine if they were constantly on the move? Did they simply pl... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/24r20z/how_did_steppe_peoples_gather_metal/ | {
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"text": [
"hi! always room for more input; meanwhile, get started on previous responses\n\n[How did nomadic people like the mongols get the metal for their weapons?](_URL_1_)\n\n[Why did the Mongols just keep on conquering?](_URL_0_)",... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/19g10b/why_did_the_mongols_just_keep_on_conquering/",
"http://www.reddit.com/r/AskHistorians/comments/1lgd65/how_did_nomadic_people_like_the_mongols_get_the/"
],
[]
] | |
eaznzk | what is the difference between a breed and species? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eaznzk/eli5_what_is_the_difference_between_a_breed_and/ | {
"a_id": [
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"fb07qjq",
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"score": [
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6,
9,
5,
3
],
"text": [
"A breed is like 2 different dogs,(husky and German shepherd) a species is like a human and a dog.",
"Different species can't produce fertile offspring. D... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
260bpp | why cant certain mentally disabled people pick up on social cues through classical conditioning? | With classical conditioning when an animal does something bad he is punished and begins to relate that action with punishment and stops. So why cant this same concept be used on disabled humans? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/260bpp/eli5_why_cant_certain_mentally_disabled_people/ | {
"a_id": [
"chmfich",
"chmh1gv"
],
"score": [
11,
11
],
"text": [
"Sometimes it is.\n\nIt depends on how disabled the person is.\n\nFor instance, in the movie \"I am Sam\" with Sean Penn, Sam is mildly retarded. He would be able to learn this way.\n\nMy nephew Kyle has Asperger's, which i... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Facial_Action_Coding_System"
]
] | |
9etu62 | even with their increased speed, how do planes get places so much faster when their altitude means they have so much more distance to travel? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9etu62/eli5_even_with_their_increased_speed_how_do/ | {
"a_id": [
"e5rjcn3",
"e5rjhur"
],
"score": [
5,
2
],
"text": [
"Their altitude typically adds less than 1% to the distance they have to travel. By contrast, they are about 700% as fast as a car on a freeway. And they can fly pretty straight, while a car must follow the road.",
"so mu... | [] | [] | [
[],
[
"https://www.quora.com/Since-the-earth-is-round-would-a-plane-flying-at-38-000-have-a-longer-distance-to-travel-than-a-vehicle-would-taking-the-same-path-on-the-ground"
]
] | ||
4i5vpg | How were economic migrants and refugees treated in Ancient Rome? Did Rome ever have open borders? | Given the current migration crisis, I've been wondering about the history of political borders, citizenship, and migration, especially forced migration. Were there any situations in Ancient Rome comparable to today's migration crisis? Did the Romans ever provide asylum to people fleeing their homes, or accept foreign i... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4i5vpg/how_were_economic_migrants_and_refugees_treated/ | {
"a_id": [
"d2vlvej"
],
"score": [
6
],
"text": [
"Immigration into the Empire is a huge topic, both from the cultural (what impact did migrants have on roman life?) as well as the military (how were the borders controlled?) perspective. Rome lasted a thousand years, and for half that time it had... | [] | [] | [
[]
] | |
2xwsg8 | In WWI and WWII, what was done in an effort to avoid widespread damage to historic structures/sites? | I understand that a large number of important, and very old, buildings were demolished during the wars, but I have also read that both sides (during both conflicts) generally did not target historic landmarks. Is this true, and if so, how/why were such efforts taken during a period of total war? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2xwsg8/in_wwi_and_wwii_what_was_done_in_an_effort_to/ | {
"a_id": [
"cp4374q"
],
"score": [
2
],
"text": [
"Although this doesn't cover the entirety of your question, you might be interested in previous threads on WWII aerial bombing and monuments:\n\n**Targeting and Historic Sites**\n\n* [What was/was not targeted in bombings during WWII (European the... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/25hhz3/do_we_have_images_photographs_of_any_art_that_was/",
"http://www.reddit.com/r/AskHistorians/comments/2a540w/how_many_of_the_historic_buildings_of_postww2/",
"http://www.reddit.com/r/AskHistorians/comments/10cxy2/why_did_italy_remain_mostly_undamag... | |
1aaohx | Firewood cracking? | Well, sitted infront of my fireplace and watched it burn lively i realised i have only a theory why wood "jumps" and cracks. My theory is that it has something to do either with trapped oxygen released or places in the wood that was bent(branches, etc) are popping under pressure... So, what really makes it crack, throw... | askscience | http://www.reddit.com/r/askscience/comments/1aaohx/firewood_cracking/ | {
"a_id": [
"c8vlhbv",
"c8vm4ua"
],
"score": [
3,
5
],
"text": [
"Probably water vapor from water trapped in the wood boiling",
"expanding gasses and water vapors trapped within the burning wood. your first assumption is correct. "
]
} | [] | [] | [
[],
[]
] | |
88kxf4 | How historically accurate is the classic robin hood hat? | What time period is it from? Is it based on a real type of hat? What is the name for this type of hat? Should the top be [pointed](_URL_2_) or [rounded](_URL_3_)?
and any more information or reading that is interesting. Thank you.
Example pictures:
_URL_0_
_URL_1_
_URL_3_ | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/88kxf4/how_historically_accurate_is_the_classic_robin/ | {
"a_id": [
"dwlk3k1"
],
"score": [
4
],
"text": [
"Check out this answer by /u/AshkenazeeYankee:\n\n[Were bycocket hats & cloaks really that popular with hunters during the medieval ages?](_URL_0_)\n\nThe \"Robin Hood\" hat you're thinking of is a bycocket hat, popular in early 1300s. From the ... | [] | [
"http://i.dailymail.co.uk/i/pix/2017/01/23/12/0054E72E00000258-4147576-image-a-28_1485173060542.jpg",
"http://mimg.ugo.com/201005/43610/1973-disneys-robin-hood.jpg",
"https://img1.etsystatic.com/194/1/6533195/il_fullxfull.1310605467_dw8s.jpg",
"https://i.pinimg.com/236x/81/75/d1/8175d15e9a13b84ededd1e2b76911c... | [
[
"https://www.reddit.com/r/AskHistorians/comments/44iusn/were_bycocket_hats_cloaks_really_that_popular/"
]
] | |
6od55b | What are some good ancient idioms? Which ones have survived until today? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6od55b/what_are_some_good_ancient_idioms_which_ones_have/ | {
"a_id": [
"dkghmhf"
],
"score": [
2
],
"text": [
"I've got one! Iliad 2.417-418:\n\n > ...πολέες δ᾽ ἀμφ᾽ αὐτὸν ἑταῖροι / πρηνέες ἐν κονίῃσιν ὀδὰξ λαζοίατο γαῖαν.\n\nWhich is \"may his many comrades around him [Hector] falling headlong in the dust seize with their teeth the earth\" So \"bite the... | [] | [] | [
[]
] | ||
3fx37r | Some materials, when hit by UV light, glow in an entirely different color. Are there any materials that, when hit by visible spectrum light, glow a different color? | For example, are there any existing materials that would glow green under a red light? | askscience | http://www.reddit.com/r/askscience/comments/3fx37r/some_materials_when_hit_by_uv_light_glow_in_an/ | {
"a_id": [
"ctsv21j",
"ctt0ohl",
"ctt0r7b"
],
"score": [
5,
3,
3
],
"text": [
"I wish I had a good practical example to use but in any case you should be able to do this with the right electronic structure. When you see photoluminescence what is happening is that the UV radiation... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Fluorescence#/media/File:Jablonski_Diagram_of_Fluorescence_Only.png"
],
[
"https://en.wikipedia.org/wiki/Green_fluorescent_protein#GFP_derivatives",
"http://www.chm.bris.ac.uk/motm/GFP/GFPh.htm"
],
[
"https://en.wikipedia.org/wiki/Stokes_shift"
]
] | |
dfteul | what exactly does “cash back” mean on credit cards, car purchases, etc? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dfteul/eli5_what_exactly_does_cash_back_mean_on_credit/ | {
"a_id": [
"f35pwx1",
"f35yg2d"
],
"score": [
2,
3
],
"text": [
"Spend $10,000 and we’ll give you $500 cash. You finance a car and get cash in your hand. Some might find it helpful to cover expenses on their car, but your paying for it in the end., plus interest.",
"The cynical answer... | [] | [] | [
[],
[]
] | ||
502wu9 | how are gift card codes endlessly generated? | You see a fat stack of about 100 gift cards sitting on a rack at the store, each with it's own unique code. If most cards just have a 16 digit numeric and alphabetic code, how do they never run out of combinations, especially with the billions of cards they produce? How do they make sure they don't accidentally make th... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/502wu9/eli5_how_are_gift_card_codes_endlessly_generated/ | {
"a_id": [
"d70rhku",
"d70rs41"
],
"score": [
2,
17
],
"text": [
"There are at least like 100 combinations of letters and numbers you can make with 16 characters",
"Let's see.\n\nThey are 26 letters, double that because these gift codes are often case sensitive, so 52, and add another... | [] | [] | [
[],
[]
] | |
cvkftc | Every U.S. president since 2000 has been forced to address claims that their election was illegitimate. Are there any historical precedents for this level of distrust in America's electoral process? | In 2000, a number of Americans claimed that the Supreme Court stole the election for George W. Bush. In 2008 and 2012, Obama was forced to address whether or not he was an American citizen. More recently, Trump has had to contend with claims that Russian interference got him elected.
It seems clear to me that the Amer... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cvkftc/every_us_president_since_2000_has_been_forced_to/ | {
"a_id": [
"ey7dp4p"
],
"score": [
10
],
"text": [
"There's two 19th century elections that faced serious questions of legitimacy: \n\n\nThe Corrupt Bargain of 1824. \nDue to the decline of the Federalist party decades earlier, the Democratic-Republican party ran 4 candidates, each nominated ... | [] | [] | [
[]
] | |
4nuz2i | Dealing with Asymmetrical warfare, instances in history where it has been successful or defeated? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4nuz2i/dealing_with_asymmetrical_warfare_instances_in/ | {
"a_id": [
"d474ueg"
],
"score": [
2
],
"text": [
"This question is simply too broad to be answered in one stroke and falls under our 'no trivia question' rules. If there is a specific conflict that you are interested in, I'd advice you to post a question about that instead of trying out somethin... | [] | [] | [
[]
] | ||
ap2szk | Are the discs of a Golgi body connected to each other? | sorry if this is a stupid question | askscience | https://www.reddit.com/r/askscience/comments/ap2szk/are_the_discs_of_a_golgi_body_connected_to_each/ | {
"a_id": [
"eg5kj58",
"eg5rwnq",
"eg67vy9"
],
"score": [
16,
9,
4
],
"text": [
"It's not a stupid question. \n\n\nI was always under the impression that they were not connected. I know for a fact that the way that different proteins transfer to different parts of the golgi netwo... | [] | [] | [
[
"https://www.sciencephoto.com/media/214898/view/golgi-apparatus-tem"
],
[],
[
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1424219/",
"https://sketchfab.com/search?q=golgi&sort_by=-pertinence&type=models"
]
] | |
3wm7v9 | if overpopulation is such a major issue, why aren't there more laws globally to prevent or control the number of children being produced? wouldn't the sustainability of the planet and our race be more important than freedom to have children in this case? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3wm7v9/eli5_if_overpopulation_is_such_a_major_issue_why/ | {
"a_id": [
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"cxx9bq7",
"cxx9d8a",
"cxx9nmm"
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"score": [
4,
8,
5,
3
],
"text": [
"The places which have the society and civil structure to enact such laws are also the places in the world which don't have population growth issues. \n\nWhen you have stability and... | [] | [] | [
[],
[],
[],
[
"https://www.ted.com/talks/hans_rosling_religions_and_babies?language=en"
]
] | |
3m0bej | If I was active in church life in the HRE around 1512, would I have a sense that something was "going to happen" like a European in 1910, or was the reformation (at least in its scale) not largely expected? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3m0bej/if_i_was_active_in_church_life_in_the_hre_around/ | {
"a_id": [
"cvazi8f"
],
"score": [
11
],
"text": [
"Would you have expected a permanent rift in western Christendom was a decade away? Absolutely not, not even if you were the monk who started it--by suggesting a series of reforms he hoped the churches in Germany and eventually the Church as a wh... | [] | [] | [
[]
] | ||
1btpd8 | What age did early humans tend to have children? | I'm asking in response to [this](_URL_0_) meme on /r/AdviceAnimals.
On an evolutionary time scale, how long have we been having our first children mostly in our mid-to-late twenties and our thirties? It would appear that our bodies "want" to have children starting at 13, but we postpone for social reasons. Are the... | askscience | http://www.reddit.com/r/askscience/comments/1btpd8/what_age_did_early_humans_tend_to_have_children/ | {
"a_id": [
"c99yjml",
"c9a26ny",
"c9a82ib",
"c9a8p6q"
],
"score": [
180,
38,
10,
2
],
"text": [
"I cannot comment on the baby-making habits of yore, but I can say that it was not at 13. Menarche has been occurring at younger and younger ages and was likely not until after ... | [] | [
"http://www.reddit.com/r/AdviceAnimals/comments/1btm2v/why_college_kids_are_able_to_party_so_hard/"
] | [
[],
[],
[],
[
"NPR.org"
]
] | |
1mmz2a | why does salty water come poring out your eyes when you hurt yourself physically/emotionally ? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1mmz2a/eli5why_does_salty_water_come_poring_out_your/ | {
"a_id": [
"ccavrax",
"ccb6ejq"
],
"score": [
15,
3
],
"text": [
"The salty water reflects light which can be seen from short distances. It is a way to communicate to comrades close to you that you are injured and require protection, but not big and dramatic enough so that predators can s... | [] | [] | [
[],
[]
] | ||
3stzrs | with the widespread use of encrypted protocols, such as https, how is the nsa still able to intercept and decipher internet traffic? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3stzrs/eli5with_the_widespread_use_of_encrypted/ | {
"a_id": [
"cx0cy6b"
],
"score": [
6
],
"text": [
"It really depends on the type of encryption that is being used. In the case of protocols like HTTPS, SSH, and VPN they've been exploiting vulnerabilities in the way Diffie-Hellman key exchange is implemented. Diffie-Hellman uses large sets of pri... | [] | [] | [
[
"https://freedom-to-tinker.com/blog/haldermanheninger/how-is-nsa-breaking-so-much-crypto/"
]
] | ||
37we5n | Did Stalin really say "Nobody respects a country with a poor army, but everybody respects a country with a good army. I raise my toast to the Finnish Army"? | According to [a forum post](_URL_0_) I found when googling this quote, this was said by Josef Stalin on *April 6th, 1948*. Googling the quote presents a number of outher results as well, all of which are not really credible sources.
My usual search engine for credible sources, _URL_1_ has nothing either, so I'm askin... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37we5n/did_stalin_really_say_nobody_respects_a_country/ | {
"a_id": [
"crqt4ae"
],
"score": [
11
],
"text": [
"It is very widely quoted, but much harder to pin down. While I don't have the original source, nor could I read Finnish to verify it if I did, I found it cited as a quote recounted by Finnish Lt. General Oinonen in 1971, for \"Sotilasaikakausleh... | [] | [
"http://forum.axishistory.com/viewtopic.php?t=151564",
"http://scholar.google.com/"
] | [
[]
] | |
1k6dcx | Why did the Chinese Empire discontinue the voyages of Zhang He? | Given that his operations had the potential to expand Chinese dominance/influence across Eastern Africa, Southeast Asia, and possibly the Pacific coast of what is now the United States | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1k6dcx/why_did_the_chinese_empire_discontinue_the/ | {
"a_id": [
"cblwl0k",
"cblxlyk",
"cbm0gvg"
],
"score": [
6,
4,
19
],
"text": [
"Someone could probably give you a better answer, but from what I recall, the voyages ended around the time when China had decided to become more isolationist and discontinue its expeditions at sea. Bes... | [] | [] | [
[
"http://en.wikipedia.org/wiki/File:Zheng_He%27s_ship_compared_to_Columbus%27s.jpg"
],
[],
[]
] | |
9x82tl | What was the deal with burying church bells? | In many myths and tales I've heard that church bells were removed and buried or thrown into lake before approaching enemy army during medieval age.
What was the reason? Were they that valuable? Or was it common to melt them and make cannons out of metal? Or what? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9x82tl/what_was_the_deal_with_burying_church_bells/ | {
"a_id": [
"e9qu2nq"
],
"score": [
17
],
"text": [
"Oh yes, they were _that_ valuable. For a simple wooden church the bell(s) could cost more than the church itself did, and at the very least it was a substantial portion of the cost of erecting a church. The main part of its value/cost was that o... | [] | [] | [
[
"http://www.fmis.raa.se/cocoon/fornsok/scanned_ref.pdf?label=Norrb%C3%A4rke+75%3A1&url=20%2F2061%2F2367%2Fdokument%2F2367-0075-01-D.jpg",
"http://old.gothic.ru/mfa/m10_r.htm",
"http://www.inschriften.net/zeige/suchergebnis/treffer/nr/di064-0003.html#content",
"http://www.inschriften.net/zeige/... | |
35yi69 | why are youtube recommendations so awful? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/35yi69/eli5_why_are_youtube_recommendations_so_awful/ | {
"a_id": [
"cr92rnr",
"cr9djsq"
],
"score": [
15,
3
],
"text": [
"So awful in what sense?\n\nYouTube tries to guess what you might be interested in, but the problem is that this is done by a complex computer program. It is, crucially, not human and thus unable to actually think. The exact... | [] | [] | [
[],
[]
] | ||
9zk4p5 | when shooting a projectile at extremely long range, how does the earth's curvature matter and how to calculate the path? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9zk4p5/eli5_when_shooting_a_projectile_at_extremely_long/ | {
"a_id": [
"ea9ud6j"
],
"score": [
3
],
"text": [
"Yes. That is for artillery and missile systems.\n\nThe main effect of the curvature is that the the target will have a lower elevation then if you assumed flat. If you fire at at target at long range like 40 km the altitude will be 126m lower the... | [] | [] | [
[
"https://en.wikipedia.org/wiki/E%C3%B6tv%C3%B6s_effect",
"https://eugeneleeslover.com/USN-GUNS-AND-RANGE-TABLES/OP-770-1.html",
"https://en.wikipedia.org/wiki/External_ballistics"
]
] | ||
2of63t | why do kids need a permission slip to watch r-rated movies in most classes in school, but in health they can show us graphic videos with no permission of any kind? | So this might be specific to my school, but I have a feeling it's not-
Today in my health class we had to watch a video of a woman giving birth, my health teacher said they watched the same one when he was he in high school at a different school, and I have cousins and friends who watched it at their various schools, ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2of63t/eli5_why_do_kids_need_a_permission_slip_to_watch/ | {
"a_id": [
"cmmk6k3",
"cmml2ti"
],
"score": [
3,
2
],
"text": [
"Kids can opt out of them and parents can request that they are not allowed to be in the classes.",
"Because giving birth isn't violent or profane. It's life. "
]
} | [] | [] | [
[],
[]
] | |
47vxff | why does a box of chocolate mints make everything else that's near it minty? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/47vxff/eli5_why_does_a_box_of_chocolate_mints_make/ | {
"a_id": [
"d0fwa9v"
],
"score": [
13
],
"text": [
"Menthol, the (natural or synthetic) essential oil that gives mint its minty flavor is volatile (it evaporates easily).\n\nSo in a closed box where some of the contents has Menthol, the Menthol scent will end up bathing everything in the box, spe... | [] | [] | [
[]
] | ||
sq8mj | Since everything is interpreted by the brain as electrical signals, is it possible we might be able to simulate real life just by stimulating and mimicking those electrical signals even if we didnt have the rest of our body? | Basically, If I was just a head in a jar, would simulating or generating the necessary signals to the brain allow us to feel everything we already do but without the rest of your body? It seems everything we feel, whether from touch to emotions is interpreted by the brain due to electrical signals. Hope that makes sens... | askscience | http://www.reddit.com/r/askscience/comments/sq8mj/since_everything_is_interpreted_by_the_brain_as/ | {
"a_id": [
"c4g3suk",
"c4g3swv",
"c4g3vr2",
"c4g4945"
],
"score": [
6,
11,
23,
4
],
"text": [
"The truth of the matter is that its theoretically possible but would have need of extremely complex computing power as well as a near perfect precise and accurate map of the subj... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Brain_in_a_vat"
],
[],
[]
] | |
5gl7qs | What is the smallest thing that we as humans can feel on our body? | For example, we can't feel bacteria moving on our body but we can feel small insects. What would be the smallest thing we could physically feel moving on our body. | askscience | https://www.reddit.com/r/askscience/comments/5gl7qs/what_is_the_smallest_thing_that_we_as_humans_can/ | {
"a_id": [
"daumg2o",
"dawb7t9"
],
"score": [
3,
3
],
"text": [
"Not sure exactly how small an object would have to be, but I believe it would be dependent on the receptive field created by the sensory innervation to an area. \n\nThe density of sensory neurons in a particular area of the ... | [] | [] | [
[],
[]
] | |
z7rm1 | If the Stingray Nebula is believed to be 25 years old, yet is 18,000 light years away, wouldn't it be 18,025 years old? | According to wikipedia, the Stingray Nebula was believed to have formed in 1987 and is 18,000 light years away. If this is the case, how could we know that it had formed if the light that would transmit this information had yet to arrive at Earth? Would we not believe it to be 18,025 years old if we observed it's formi... | askscience | http://www.reddit.com/r/askscience/comments/z7rm1/if_the_stingray_nebula_is_believed_to_be_25_years/ | {
"a_id": [
"c626z24",
"c627e1i"
],
"score": [
3,
2
],
"text": [
"Wikipedia article is down for me, but I'm going to say that either a) bad grammar or b) the article says that it was *observed* as a newly formed nebula in 1987. In any event, you would be right. If it was observed to be new... | [] | [] | [
[],
[]
] | |
3mox1k | what does nasa have to gain by waiting to release its newly found discovery? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mox1k/eli5_what_does_nasa_have_to_gain_by_waiting_to/ | {
"a_id": [
"cvgsv9h",
"cvgtp63"
],
"score": [
6,
2
],
"text": [
"Usually you want to double check everything and then double check it again. You dont want to go saying you discovered something new and then it be a math error or whatever else. ",
" > What does NASA have to gain by wait... | [] | [] | [
[],
[]
] | ||
4yqevo | how do hackers get caught? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4yqevo/eli5_how_do_hackers_get_caught/ | {
"a_id": [
"d6pnww0",
"d6pp8az",
"d6ptchg",
"d6px8go",
"d6pzm7p",
"d6q03ok"
],
"score": [
2,
138,
14,
12,
7,
2
],
"text": [
"First of all, catching a hacker is quiet difficult. Of course, if a hacker uses his own ip address, or if he leaves other traces, yo... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
b0lklu | At the "height of feudalism" would a king's army ever be mostly or completely consisting of knights? Or would they always be outnumbered by peasant levies and/or mercenaries? | By "height of feudalism" I mean the time when a king was most reliant on his landed vassals to provide soldiers rather than privately salaried ones. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/b0lklu/at_the_height_of_feudalism_would_a_kings_army/ | {
"a_id": [
"eig1k0u"
],
"score": [
9
],
"text": [
"I'm not going to get into the whole feudalism debate here, but know that there are a lot of things that term can mean and it's a difficult one to use precisely. The early Middle Ages, which is usually seen as a \"pre-feudal\" period by those who ... | [] | [] | [
[]
] | |
6rsxd6 | often times when we pay via a credit/debit card for a service that desires a tip, we later do not see the added tip amount reflected on our bank statements. why is this? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6rsxd6/eli5_often_times_when_we_pay_via_a_creditdebit/ | {
"a_id": [
"dl7hfpb",
"dl7hg5e"
],
"score": [
3,
5
],
"text": [
"To collect the tip takes extra steps by the people who process your slip. If that's a back-office person (not the server who gets the money) sometimes it doesn't happen. You win, the server loses.",
"When you pay for s... | [] | [] | [
[],
[]
] | ||
otfsv | how does the nervous system work? | How are messages sent from the brain to the muscles, and from the skin to the brain? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/otfsv/how_does_the_nervous_system_work/ | {
"a_id": [
"c3jxudu",
"c3k0eit"
],
"score": [
4,
2
],
"text": [
"Nerves. They're like wires carrying electricity. More like fiber-optic cables carrying information, actually.",
"Ok, we've got a neuron (a nerve cell), this has got a cell body bit, with lots of little tentacles things c... | [] | [] | [
[],
[]
] | |
eh0zhh | how come bleach will ruin solid colors in the washer but you can put something mostly white with a little color and it won’t ruin it? | For example I’ve accidentally splashed some bleach on an all red shirt I had and it stained but my girlfriend has socks that are all white with pink tips on the toes and when those get washed with bleach the pink doesn’t stain or spot. Why ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eh0zhh/eli5_how_come_bleach_will_ruin_solid_colors_in/ | {
"a_id": [
"fcbuudy",
"fcc0hfi"
],
"score": [
3,
2
],
"text": [
"Because dyes and stains are a chemical bond to the fabric. Bleach is good at tearing bonds apart. Your shirt would get holes in it if you left undiluted bleach pooled in one section.",
"Some washers (such as mine) have a... | [] | [] | [
[],
[]
] | |
47xj2z | are subs really healthier than burgers if so how? | Had this shower thought occur to me today and now I'm curious. A burger and a sub are basically the same thing with bread, meat, cheese, and lettuce with other toppings. Only real difference is a sub is a larger portion of this bread, meat, cheese, and toppings. Yet there are restaurants like subway that advertise thei... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/47xj2z/eli5_are_subs_really_healthier_than_burgers_if_so/ | {
"a_id": [
"d0g2ae4",
"d0g2bwa",
"d0g2c69"
],
"score": [
3,
6,
5
],
"text": [
"Well, being fried or grilled makes a big difference.\n\nBoth of these can lead to compounds which may be carcinogenic.\n\nOf course, depending on what meats are in the sub, they can have their own issue... | [] | [] | [
[],
[],
[]
] | |
7wfhf1 | am i building a tolerance to spicy foods/seasonings or am i just frying my taste buds? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7wfhf1/eli5_am_i_building_a_tolerance_to_spicy/ | {
"a_id": [
"dtzx366",
"du00cjj"
],
"score": [
23,
4
],
"text": [
"Spicy food doesn't fry your taste buds, that's a myth.\n\nThey're perfectly fine and intact, but may be temporarily overwhelmed by something very spicy, which results in your brain numbing the response. This makes it feel l... | [] | [] | [
[],
[]
] | ||
1pjit9 | why do criminal trials often occur years after the crime (in the us), if the us constitution guarantees a "right to a speedy trial"? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1pjit9/eli5_why_do_criminal_trials_often_occur_years/ | {
"a_id": [
"cd2xny1",
"cd2xpxh",
"cd2y450",
"cd2z78r"
],
"score": [
2,
2,
2,
3
],
"text": [
"Dedendents frequently waive their right to a speedy trial, because a large portion of trials end in a guilty verdict--anything the prosecuter can't win gets settled long before, an... | [] | [] | [
[],
[],
[],
[]
] | ||
4gjlvp | how do gopros stabilize the image? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4gjlvp/eli5_how_do_gopros_stabilize_the_image/ | {
"a_id": [
"d2i36hj",
"d2i50at",
"d2i5i23",
"d2iiag3"
],
"score": [
18,
2,
5,
2
],
"text": [
"The raw video actually has extra pixels on the edge that you can't see. Internal gyroscopes apply drift compensation and process the stability correction in real time by sacrifici... | [] | [] | [
[],
[],
[],
[]
] | ||
irdsi | Bees work together en masse to generate a level of heat that kills hostile hornets, but which they can survive. How do they know to do that? | Not just for the sake of this one circumstance, I'm interested to know what this means regarding animals learning, passing on behaviour or being creative.
Apparently, a certain breed of bee will defend its hive by gathering in large numbers and smothering an invading hornet, then using their flight muscles in unison t... | askscience | http://www.reddit.com/r/askscience/comments/irdsi/bees_work_together_en_masse_to_generate_a_level/ | {
"a_id": [
"c2610q6",
"c261h4g",
"c261n9u"
],
"score": [
8,
3,
2
],
"text": [
"Instinctive social behaviors are also passed on genetically in every species. In some, it's simple - like how to find, attract, and copulate with a member of your own species of the opposite sex. In b... | [] | [] | [
[],
[],
[]
] |
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