q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
|---|---|---|---|---|---|---|---|---|---|
ynw2h | Are there any materials that are actually far more fit for a purpose or component that we use frequently, but are either poisonous, hazardous, or detrimental to our health? | There are known dangers of lead, mercury, and other items that we use in products that have led to restrictions of their use. Are there any wonder materials (superconductor, insulator, armor, fabric, etc) that have some serious danger that doesn't allow us to integrate it into our tools and technology but would be the... | askscience | http://www.reddit.com/r/askscience/comments/ynw2h/are_there_any_materials_that_are_actually_far/ | {
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"score": [
16,
3,
2
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"text": [
"Is there a more classic example than [Asbestos](_URL_0_)?",
"Lead is great in solder and BeO is great for heat dissipation in electronic circuits but their use is diminishing. ",
"look up beryl... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Asbestos#Health_problems"
],
[],
[]
] | |
41oh0p | Did Medieval Europeans use coins differently than we do today? | In other words, if you bought something, did you get change back, or did coins bestow to you some kind of "clout" that allowed you access to goods and services? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/41oh0p/did_medieval_europeans_use_coins_differently_than/ | {
"a_id": [
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"cz462tx",
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17,
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"text": [
"Coins were exclusively used as a means of exchange between strangers. Because most transactions would take place between people in the same town or village, coinage, up to the rise of the more 'anonym... | [] | [] | [
[],
[],
[]
] | |
3c58mk | how do websites that host tv shows for free not get taken down? | i.e: _URL_1_, _URL_2_, _URL_0_ | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3c58mk/eli5_how_do_websites_that_host_tv_shows_for_free/ | {
"a_id": [
"csscmsx",
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"score": [
2,
2
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"text": [
"Either they've bought a license to show it from the producer and are using ad money to support themselves, some of their ad money is going straight to the producer, or they are pirating the videos and just haven't been caugh... | [] | [
"shush.se",
"Animeflavor.com",
"putlocker.is"
] | [
[],
[]
] | |
5wniq4 | Why was the BBC which was initially a private Corporation nationalized by the British Government in 1926? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5wniq4/why_was_the_bbc_which_was_initially_a_private/ | {
"a_id": [
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"text": [
"To avoid the chaos experienced in America with regards to broadcast licensing, the GPO (General Post Office) decided that instead of giving licenses to the (hundreds, by 1922) of wireless radio societies who had applied they would give once licen... | [] | [] | [
[]
] | ||
1oxwqi | why was a city like new orleans built... | ...below sea level? Did city planners assume that the levys would always hold? Why put so many people in such danger? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1oxwqi/eli5_why_was_a_city_like_new_orleans_built/ | {
"a_id": [
"ccwqt31",
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"score": [
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"text": [
"It wasn't really planned. It was just a bunch of French settlers, I believe, who chose the area because it looked legit. It ballooned in size, and suddenly city planners realized that the whole area wa... | [] | [] | [
[],
[],
[]
] | |
4xurpx | How did Napoleon plan to invade England? | How would the landing of 200 000 men look like? What tactics would the British and the French use? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4xurpx/how_did_napoleon_plan_to_invade_england/ | {
"a_id": [
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"score": [
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"text": [
"The short answer to this is that Napoleon's plan consisted of gaining command of the Channel for a short length of time, and invading across the narrow seas with a combined force of infantry, artillery and cavalry crossing in small, flat, oared ... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3ebdk5/how_did_nelsons_tactics_work_at_trafalgar/"
]
] | |
32bbgg | why is it that "jobs" are the resource that our economy so desperately needs? if there's nothing that needs doing, isn't that a good thing? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32bbgg/eli5why_is_it_that_jobs_are_the_resource_that_our/ | {
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"score": [
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6,
2,
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"text": [
"The economy desperately needs more taxpayers, more people with some expendable income.",
"The capitalistic system can not cope with the fact that people would not be able to fi... | [] | [] | [
[],
[],
[],
[]
] | ||
59ffz8 | why do people buy/ live in "tiny houses"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/59ffz8/eli5_why_do_people_buy_live_in_tiny_houses/ | {
"a_id": [
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"d9829f6",
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"score": [
2,
3,
5,
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],
"text": [
"Maybe they don't like living in a big space like I would rather live in an apartment with one bedroom then a mansion. It's all personal presence.",
"It's about being as economi... | [] | [] | [
[],
[],
[],
[
"https://youtu.be/MvgN5gCuLac"
]
] | ||
jwdr3 | How is wind speed measured? | I've read about anemometers and Doppler radar - do meteorologists use land-based Doppler radar for wind speed detection, or only precipitation patterns? Is all wind speed detection done locally using anemometers, or is there a radar-based method like there is for precipitation?
Do satellite radars factor into the equ... | askscience | http://www.reddit.com/r/askscience/comments/jwdr3/how_is_wind_speed_measured/ | {
"a_id": [
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"score": [
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"text": [
"One way to measure fluid velocity is with a [pitot tube](_URL_0_).",
"One way to measure fluid velocity is with a [pitot tube](_URL_0_)."
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Pitot_tube"
],
[
"http://en.wikipedia.org/wiki/Pitot_tube"
]
] | |
1pstcd | why don't i see more picture in a 1080p resolution vs 720p | I've spent the last hour reading up on resolutions and aspect ratios on ELI5 and I've pretty much wrapped my head around it but I can't seem to find an answer to one question.
When advertising HDTV, companies said you would see more of the picture with a higher resolution. For example a picture of a house at 720p would... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1pstcd/eli5_why_dont_i_see_more_picture_in_a_1080p/ | {
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"text": [
" > why isn't the field of view larger as you go from 720p to 1080p?\n\nQuite simply, it's because the entire point of higher resolution is usually better quality, not a larger field of view. No one wants a better display ju... | [] | [] | [
[],
[
"http://i.imgur.com/E5GcAzj.jpg"
]
] | |
vu5za | How much influence did other species of humans have on early homo sapiens? | Homo heidelbergensis [buried their dead](_URL_3_) and lived until around 400,00 years ago.
Homo erectus was [seafaring](_URL_5_) and lived until 50,000 years ago.
Neanderthals were also [seafaring](_URL_1_), had [more than one culture](_URL_0_), possibly believed in an [after life](_URL_2_), [created the first cave a... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/vu5za/how_much_influence_did_other_species_of_humans/ | {
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"score": [
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2
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"text": [
"Bit early for folks around here I fear - we tend to deal with history only since the beginning of human records (ca. 5000 BP). I'd suggest /r/archaeology or... | [] | [
"http://www.ucdenver.edu/about/newsroom/newsreleases/pages/neanderthalsmoreadvancedthanthought.aspx",
"http://www.newscientist.com/article/mg21328544.800-neanderthals-were-ancient-mariners.html",
"http://news.discovery.com/history/neanderthal-burial-ground-afterlife-110420.html",
"http://humanorigins.si.edu/r... | [
[],
[
"http://johnhawks.net/weblog/reviews/neandertals/neandertal_dna/hapmap-introgression-neandertals-2012.html",
"http://med.stanford.edu/ism/2011/august/caveman.html",
"http://en.wikipedia.org/wiki/List_of_Neanderthal_sites",
"http://www.reddit.com/r/askscience/search?q=neanderthal&restrict... | |
xhher | How is it possible that transmission from an HIV-positive mother to an infant not a 100% certainty? | I was listening to NPR the other day and they were doing a news piece on AIDS in Africa. They mentioned that they were able to reduce the chances of transmitting HIV from a mother to baby to around 4%. My question is: how is that possible since the fetus is submerged in the mother's amniotic fluid? I was under the impr... | askscience | http://www.reddit.com/r/askscience/comments/xhher/how_is_it_possible_that_transmission_from_an/ | {
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"score": [
2,
18
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"text": [
"Off the top of my head, mother and baby don't exchange substances directly, mixing blood, but by diffusion through the placenta, so the virus can't pass from the mother's bloodstream to the uterus, it's far too big to diffu... | [] | [] | [
[],
[
"http://www.ncbi.nlm.nih.gov/pubmed/22716975",
"http://jama.jamanetwork.com/article.aspx?articleid=1104003#EPIDEMIOLOGYANDRISK",
"http://www.ncbi.nlm.nih.gov/pubmed/19372528"
]
] | |
67ivwy | saudi arabia's un women's council appointment? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/67ivwy/eli5_saudi_arabias_un_womens_council_appointment/ | {
"a_id": [
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"text": [
"The 'how' is pretty easy: the UN is broken up into unofficial voting blocks, of which the Middle East Arab nations are one. Of the seats up for appointment on the council, the Middle East coalition was able to assure that at least a couple deleg... | [] | [] | [
[]
] | ||
6ww3fy | Why Was American Architecture for Public Buildings From the Late 1960's to Late 1970's So Terrible? | I've noticed this with schools, offices, dorms, etc etc. The materials and construction are often terrible, with these ugly avocado and burnt orange colors. A lot of the dorms on my alma matter from the 70's are getting torn down and replaced, while a lot of the ones from the 50's have been renovated.
Why was this suc... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6ww3fy/why_was_american_architecture_for_public/ | {
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"score": [
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],
"text": [
"At least part of the story is told through the answer and follow-up in this thread on [brutalist architecture](_URL_0_).\n\nAlthough the initial question ... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/57ogw4/why_was_brutalism_so_connected_with_public_housing/"
],
[],
[],
[],
[
"http://www.pulitzer.org/winners/miami-herald",
"https://knightfoundation.org/articles/historymiami-exhibit-remembers-hurricane-andrew-25-years-after-the-storm-change... | |
45tpzj | in america, if i am innocent until proven guilty, why did i go to jail for 3 days after my arrest? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/45tpzj/eli5_in_america_if_i_am_innocent_until_proven/ | {
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"score": [
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"text": [
"Same thing happened to me. In my experience, the law doesn't care about you, what you think, or how long you're kept. In their eyes, you were involved in a criminal act in some way... | [] | [] | [
[],
[],
[],
[]
] | ||
6ct5jt | why do people like 4chan so much, seeing how toxic and immature the whole website is? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ct5jt/eli5_why_do_people_like_4chan_so_much_seeing_how/ | {
"a_id": [
"dhx7ize"
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"score": [
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"text": [
"As it's all anonymous, you get some honesty on certain topics that people wouldn't say should their name be attached to it.\n\nYou could read interesting things without being worried who said it or what their other views are, I honestly think the... | [] | [] | [
[]
] | ||
1xg483 | why do we knock three times? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1xg483/eli5_why_do_we_knock_three_times/ | {
"a_id": [
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"score": [
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"text": [
"Because someone wants The Doctor to die.",
"So I'll know that you want me!lol Noone under 30 will get this.",
"Or, Twice on the pipe..",
"3 is the shortest number of re... | [] | [] | [
[],
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2cdlyv | Was there ever a "slave breeder" industry in the United States? | As I understand it, most of the slaves in the United States were brought over as young adults from East Africa by slave traders.
I am curious if there was ever an industry in the US that "bred" slaves state-side. Specifically, people who bought slaves and arranged for them to mate, with the sole intent of selling off ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2cdlyv/was_there_ever_a_slave_breeder_industry_in_the/ | {
"a_id": [
"cjeh7ib"
],
"score": [
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],
"text": [
"It depends on what you mean by \"industry.\" Was there a system of slave breeding based purely on the need to make sure race based slavery survived pass the banning of the actual trade? Yes, absolutely. It's one of the most horrific things to stu... | [] | [] | [
[]
] | |
2r05nb | Can you help me identify these possible WW2 locations? | _URL_0_
This tiny photo was in the belongings of my grandmother who died a few years ago along with a variety of other photos, mainly to do with my grandfather serving in WW2.
They lived in England but I know he served abroad in Belgium and France which may explain the French (I think) writing on the signs.
Any idea... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2r05nb/can_you_help_me_identify_these_possible_ww2/ | {
"a_id": [
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"score": [
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"text": [
"The writing on the top of the building in the second photo says \"Changing hut for < unreadable > services officers & OR\"\n\nThat would suggest to me that this is in an R & R area, where troops are sent for time off.\n\... | [] | [
"http://imgur.com/wrmFZEw",
"http://imgur.com/Z7Vkzli"
] | [
[],
[]
] | |
3swiqj | how to build a bridge around the world. | What i mean is, if i wanted to build a bridge around the world, would i need to make the bridge round because the globe is round as well?
Or if i kept building it straight would it go out in space because Earth is round and i was building a bridge out of the Earth's diameter? What would happen? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3swiqj/eli5how_to_build_a_bridge_around_the_world/ | {
"a_id": [
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"text": [
" > if i wanted to build a bridge around the world, would i need to make the bridge round because the globe is round as well?\n\nYes, that's exactly what you would have to do.\n\n > if i kept building it straight would it go ... | [] | [] | [
[],
[]
] | |
1o8j3a | why does the center of the pizza get warmer slower the rest? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1o8j3a/eli5why_does_the_center_of_the_pizza_get_warmer/ | {
"a_id": [
"ccppzz6"
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"score": [
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"text": [
"The surface area for heating is greater around the edges of the pizza compared to the center of it, so the edges get warm first, which allows the heat from the edges to conduct to the material right next to the edges, which heats that up, slowly ... | [] | [] | [
[]
] | ||
2jgqs0 | What successful tactics did Eurasian steppe peoples use when faced with an army with large numbers of infantry archers or crossbowmen? | Playing the Total War series, I've found that the one sure counter to horse archers is large numbers of missile infantry protected by spearmen to counter a charge. Did the opponents of the Huns, Mongols and Turks (to name a few) attempt to counter the horse archer's supremacy in the field with infantry archers, and ho... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2jgqs0/what_successful_tactics_did_eurasian_steppe/ | {
"a_id": [
"clbzx1n"
],
"score": [
2
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"text": [
"The short answer is that they never faced that kind of force. \n\nThe longer answer is that large units of unmounted archers were very rare. The English had them but never fought against horse archers. Crossbow units were moderately common but we... | [] | [] | [
[]
] | |
shntl | why does my eye lid keep twitching? | This has been happening off and on for 24hrs now. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/shntl/eli5_why_does_my_eye_lid_keep_twitching/ | {
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"score": [
16,
4,
6,
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2,
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"text": [
"It's just random muscle spasms. Can be an indicator of lack of sleep... | [] | [] | [
[],
[
"http://www.eyehealthweb.com/conditions/eye-twitching/"
],
[],
[],
[],
[],
[
"http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002586/"
],
[],
[]
] | |
8i1hjy | Why didn’t Hannibal invade Italy through Sicily or through southern Italy rather than crossing the Alps? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8i1hjy/why_didnt_hannibal_invade_italy_through_sicily_or/ | {
"a_id": [
"dyrbf4f"
],
"score": [
2
],
"text": [
"To put it simply, it would have been a disaster to invade through Sicily during Punic 2, as the Roman navy would just swat down troop transports due to their well established naval superiority following Punic 1. \n\nLet’s start with some context ... | [] | [] | [
[
"https://i.imgur.com/9DNp0CM.png"
]
] | ||
6d20ec | why do most of the ads on tv sound/look like they are made for really really stupid people? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6d20ec/eli5_why_do_most_of_the_ads_on_tv_soundlook_like/ | {
"a_id": [
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"dhzdzcv",
"dhze4an",
"dhze9hn",
"dhzea6s",
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"dhzi5ji",
"dhzk3cy",
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... | [] | [] | [
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1j3if1 | European Women in the Middle Ages and their clothing. | I know the skirt and dress were popular styles for women in the Middle ages due to tradition as well as also helping with thrush. My curiosity lies in women who tried to defy the norm and wear breeches and other masculine clothing. Did any women do this? Who were they? What were the reactions of the local community, if... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1j3if1/european_women_in_the_middle_ages_and_their/ | {
"a_id": [
"cbaqd8x",
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"score": [
4,
5
],
"text": [
"Joan of Arc wore men's clothing several times: when travelling, as a disguise; in battle, she wore armour; and when in prison she wore men's clothing as protection from rape. At her trial the court considered this immodest a... | [] | [] | [
[
"http://www.fordham.edu/halsall/basis/joanofarc-trial.asp"
],
[
"http://www4.wittenberg.edu/academics/hist/alivingstone/201_Crusades/nicolson_article.pdf",
"http://www.umilta.net/jerusalem.html**"
]
] | |
801zqw | Why does alcohol smell up a room, while soft drinks do not? | I, and I’m sure I’m not alone in this observation, have discovered that if you open a beer or other alcoholic beverage in a room, others can instantly smell it when entering the room, but soft drinks are much less potent. Why is alcohol so much more aromatic? Does it have to do with rate of evaporation? | askscience | https://www.reddit.com/r/askscience/comments/801zqw/why_does_alcohol_smell_up_a_room_while_soft/ | {
"a_id": [
"dutu4sk",
"dutuxpg",
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],
"score": [
2,
5,
3
],
"text": [
"At least part of it is likely the ethanol in alcoholic drinks. Ethanol is more volatile than the stuff in soft drinks, and we are also more trained to recognize it when it's present.\n\nNobody ever say... | [] | [] | [
[],
[],
[]
] | |
7jebj9 | Have the Hawaiian islands gotten bigger or smaller over time? | Have they gotten smaller because of global warming?
Were they larger or more prominent 150 years ago before industrialization?
Is it possible their size would change regardless given their geographical location?
Are they going to disappear and what may cause that? | askscience | https://www.reddit.com/r/askscience/comments/7jebj9/have_the_hawaiian_islands_gotten_bigger_or/ | {
"a_id": [
"dr5v6i7",
"dr5w7mm"
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"score": [
12,
5
],
"text": [
"Both. The older islands to west are (very) slowly being eroded away by the ocean. The big island, being currently over the hot spot and actively erupting, is adding new land via lava flow. I'm not sure by how much, but K... | [] | [] | [
[],
[
"https://19january2017snapshot.epa.gov/sites/production/files/2016-09/documents/climate-change-hi.pdf",
"http://www.sciencedirect.com/science/article/pii/S0016703712005583?via%3Dihub",
"http://www.sfgate.com/news/article/Kiss-that-Hawaiian-timeshare-goodbye-Islands-2468202.php"
]
] | |
17tpxa | What has the history of Prague been like? In what ways have the lives of the citizens changed under the various rulerships, and how has the shape of the city itself changed? | I am most interested in the times from 1850 until present, though earlier history is very welcome :) I know the question is very vague, but I know very little about the city and I would like to use it as a setting for a story/ roleplaying game, and I would like some information to really ground the setting. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17tpxa/what_has_the_history_of_prague_been_like_in_what/ | {
"a_id": [
"c89160v"
],
"score": [
2
],
"text": [
"I might be able to help. I am somewhat familiar with the history of Prague and lived there for awhile. Could you please be a bit more specific. What type of things and exact time periods are you interested in?"
]
} | [] | [] | [
[]
] | |
1nkmsa | The modern portrayal of a harem is a sultan's multiple beautiful slaves residing in a luxurious house and awaiting his pleasure. I understand this is a misconception, but did anything like that ever exist anywhere? | Title says it all. I understand that historical harems were more like women's dormitories than anything, but was there ever any time in history where anything like the Hollywood portrayal of a harem actually existed? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1nkmsa/the_modern_portrayal_of_a_harem_is_a_sultans/ | {
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"text": [
"I don't know about the slaves waving palm fronds and things like that, but the hougong (lit. \"back palace\") of the Forbidden City in Beijing was actually [a very pretty place]... | [] | [] | [
[
"http://www.helium.com/items/1073145-forbidden-city-beijing",
"http://history.cultural-china.com/chinaWH/upload/upfiles/2009-06/18/the_emperors_harem_in_late_imperial_chinad0bcfff48023f67c4ebd.jpg",
"https://en.wikipedia.org/wiki/Ranks_of_imperial_consorts_in_China",
"http://www.dailymail.co.uk/ne... | |
t53nh | why do lights on tvs, game consoles etc, stay on even when the power is turned off? | I have my TV and PS3 plugged into an extension chord, which is then plugged into a powerpoint.
How come even when I turn off the powerpoint, the TV "standby" light remains lit for up to 5 minutes?
Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/t53nh/eli5_why_do_lights_on_tvs_game_consoles_etc_stay/ | {
"a_id": [
"c4jls8b"
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"score": [
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"text": [
"Most electronics have 'capacitors' in them. Capacitors are like batteries, but they're used for very short-term power storage, often for things like 'smoothing out' the incoming power to cope with peaks and dips.\n\nWhen the device is on, the ca... | [] | [] | [
[]
] | |
b8pqre | If a submarine loses it ability to function underwater, is it possible to “tow” it back to the surface? | askscience | https://www.reddit.com/r/askscience/comments/b8pqre/if_a_submarine_loses_it_ability_to_function/ | {
"a_id": [
"ejzft30"
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"score": [
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"text": [
"Submarines dive by filling ballast tanks with water. When the sub dives, air from the tanks is compressed into storage tanks, and replaced with seawater. In an emergency, the compressed air can be released back into the ballast tanks, blowing th... | [] | [] | [
[]
] | ||
nuclt | why is acceleration used in f=ma and not velocity? | If something is accelerating quickly but moving slowly wouldn't that have less force than something that is accelerating slowly (or even decelerating) but moving quickly?
Am I just confusing terminology or is it something else? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/nuclt/why_is_acceleration_used_in_fma_and_not_velocity/ | {
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"You're taking friction into account.\n\nImagine that you're in space. If you push somethin... | [] | [] | [
[],
[],
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49vp3p | Is climate change related to heat capacity of combustion product gases relative to the starting gases? | I have generally good knowledge of chemistry, but I am beginning to think that I have understood the mechanism of climate change and greenhouse gases incorrectly from the beginning. I may have just learned the wrong thing early on and never looked back. Here's how I understand greenhouse gases. Let's think about com... | askscience | https://www.reddit.com/r/askscience/comments/49vp3p/is_climate_change_related_to_heat_capacity_of/ | {
"a_id": [
"d0vja94"
],
"score": [
11
],
"text": [
"You have misunderstood the mechanism from the beginning. The basic concept of greenhouse gases is that the light from the sun (which peaks in the visible spectrum) can mostly pass through. This light hits the Earth and is absorbed, warming the E... | [] | [] | [
[
"http://farside.ph.utexas.edu/teaching/sm1/lectures/node70.html"
]
] | |
yy96f | how does a voice commentary for sports videogames (ex. nba 2k12) actually get recorded? how does it actually work? | Well, explain like I'm 8 would be adequate. My nephew is constantly amazed that the commentators seem to almost always be saying the right thing whenever he plays his NBA 2K12 on his Playstation. I notice that the comments may get a bit repetitive at times, but it also still quite blows my mind. So how do they do it? D... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/yy96f/eli5_how_does_a_voice_commentary_for_sports/ | {
"a_id": [
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"score": [
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"text": [
"They don't record every line for every player. They'll record each player's name in a couple of tones of voice, and then plug the recording of the name into a longer line of commentary.\n\nHowever, some of the lines that ar... | [] | [] | [
[],
[
"http://www.youtube.com/watch?v=2Zc2HPsiJ5E"
]
] | |
23fk14 | How long can a small house spider last without food or drink? | There has been a small spider (named Tyrone) living in my room for the last week or so and he hasn't had a drop of water or any bugs to eat. Will he die soon or is this normal behaviour? To give an idea of the species he is a tiny spider-smaller than a penny. | askscience | http://www.reddit.com/r/askscience/comments/23fk14/how_long_can_a_small_house_spider_last_without/ | {
"a_id": [
"cgwtvjy"
],
"score": [
4
],
"text": [
"Well, first of all spiders can survive several months without food/water as they can use minimal energy by limiting their movements, so it looks like Tyrone has nothing to worry about.\n\nAlso, when you say that he's been living in your room - ha... | [] | [] | [
[]
] | |
19t3us | I'm a regular soldier who got wounded in your time's army. How would I be helped? | Say I got a significant slash wound on my thigh.
Would I just be an expendable resource and just be ignored?
What kind of first aid or hospitalization would given to me?
What were my odds of actually surviving?
Would I have to pay someone for healing me? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/19t3us/im_a_regular_soldier_who_got_wounded_in_your/ | {
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"score": [
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94,
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"You're casting a wide net here but in general, there are 3 f... | [] | [] | [
[],
[],
[],
[
"http://www.reddit.com/user/sadbabyrabbit"
],
[],
[
"http://www.amazon.co.uk/They-Called-Passchendaele-Battle-Fought/dp/0140165096",
"http://upload.wikimedia.org/wikipedia/commons/7/79/Chateau_Wood_Ypres_1917.jpg"
],
[],
[
"http://www.civilwarhome.com/woundedtransport... | |
2n654w | Why is uranium radiation so dangerous if it has a much longer half-life than common radioactive elements? | askscience | http://www.reddit.com/r/askscience/comments/2n654w/why_is_uranium_radiation_so_dangerous_if_it_has_a/ | {
"a_id": [
"cmbmy2e"
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"score": [
2
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"text": [
"It's actually not, unless highly concentrated. Ur-238 (which makes up most of natural Uranium) decomposed by [alpha-decay](_URL_0_). Alpha particles can be stopped by dead skin so aren't too dangerous outside the body. It's when you get it in you... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Alpha_decay"
]
] | ||
2z5jpa | why has the human body not evolved so that we can drink seawater? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2z5jpa/eli5_why_has_the_human_body_not_evolved_so_that/ | {
"a_id": [
"cpfudlt",
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"score": [
3,
5
],
"text": [
"Because we haven't had to. There's always been plenty of fresh water for most humans on the planet. Adapting to drink sea water would be a difficult feat so the path of least resistance with regards to natural selection ha... | [] | [] | [
[],
[]
] | ||
1v8esk | would it ever be feasible for reddit to band together and fund a neutral and pro-competitive isp? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1v8esk/eli5_would_it_ever_be_feasible_for_reddit_to_band/ | {
"a_id": [
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2
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"text": [
"In theory, yes. In practice, not likely. Any small company would need some serious money to build its own infrastructure, or have to pay into the larger corporations to use their established infrastructure, meaning they would have a hard time pro... | [] | [] | [
[]
] | ||
4tzicr | How does the LIGO observatory compensate for all of the environmental factors i.e. storms, strong winds, human movement around the facility etc. ? | askscience | https://www.reddit.com/r/askscience/comments/4tzicr/how_does_the_ligo_observatory_compensate_for_all/ | {
"a_id": [
"d5lqivk"
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24
],
"text": [
"Summing up [this page](_URL_0_), this is how they sort out the signals at LIGO:\n\n* Observations - if seismometers, barometers, [weather rocks](_URL_1_), or other instruments detect a terrestrial disturbance, corresponding events at LIGO can be... | [] | [] | [
[
"https://www.ligo.caltech.edu/WA/page/faq",
"https://en.m.wikipedia.org/wiki/Weather_rock"
]
] | ||
2caye4 | what happens to all the people who are arrested during protests? | So we keep seeing articles: X number of protesters arrested at Y location. Obviously there are different answers to this question depending on who's doing the arresting and the situation, but what generally happens to these people? How long do they stay in prison? Do they get anything on their record? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2caye4/eli5_what_happens_to_all_the_people_who_are/ | {
"a_id": [
"cjdokys"
],
"score": [
3
],
"text": [
"in US, you probably just get a slap and an overnight stay.\n\ndo the same in China, the iphone 10 will be out before you see the light of day."
]
} | [] | [] | [
[]
] | |
58b1t4 | why is it so difficult to tell if clothes are damp or just cold? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/58b1t4/eli5_why_is_it_so_difficult_to_tell_if_clothes/ | {
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"text": [
"The body has no 'wet' sensors so it compensates by interpreting cold+pressure as wet. This is also why you t... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | ||
2pz4o8 | how has 50 shades of gray, a piece of pornography, become accepted and embraced by the very audience who would normally decry works with subjects like bdsm, to the point of having a movie made out of it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2pz4o8/eli5_how_has_50_shades_of_gray_a_piece_of/ | {
"a_id": [
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"cn1f5z5",
"cn1fs98",
"cn1fw6w",
"cn1gbxd",
"cn1gqlv",
"cn1gqq1",
"c... | [] | [] | [
[],
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[],
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"http://www.reddit.com/r/TwoXChromosomes/comments/2byz2l/many_women_do_not_agree_with_me_on_this_subject/cjaqvmi"
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1nmvr7 | what is a bitcoin? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1nmvr7/eli5_what_is_a_bitcoin/ | {
"a_id": [
"cck24gg"
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"score": [
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"text": [
" > What is it?\n\nBitcoin is, depending on your perspective, either a new form of money that doesn't tie itself to any country, or a payment processing option that is able to offer lower fees than credit cards (these fees are charged to merchants... | [] | [] | [
[
"Blockchain.info",
"https://www.spendbitcoins.com/places/"
]
] | ||
87m0yj | why is it so difficult to inflate a balloon inside of another balloon? | Long story short my friend got bored at work and had two balloons, so he put one inside of the other and was unable to inflate it. He took it to our helium tanks in the back and those struggled to inflate the balloons. What about the second layer of rubber (or whatever they're made of) makes it so difficult to inflate?... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/87m0yj/eli5_why_is_it_so_difficult_to_inflate_a_balloon/ | {
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2,
6,
2,
2
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"text": [
"I'm guessing because the air pressure inside the already inflated balloon is higher than the deflated one, so it's hard to inflate the inner balloon because all the air pressure fr... | [] | [] | [
[],
[],
[],
[]
] | |
yi3py | How are creatures without air spaces (e.g.) fish, bacteria) harmed by high pressures? | I was inspired by the XKCD guy [discussing what would happen if you gathered Avogadro's number worth of small mammals in one place.](_URL_0_)
He says:
> But throughout the majority of the planet’s interior, the pressure is over a hundred megapascals, which is enough to kill all bacteria and sterilize the mole remai... | askscience | http://www.reddit.com/r/askscience/comments/yi3py/how_are_creatures_without_air_spaces_eg_fish/ | {
"a_id": [
"c5vrcte",
"c5vxv9b"
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"score": [
3,
2
],
"text": [
"Water is not incompressible. It just isn't very compressible. Apply enough pressure and ANYTHING will compress. Also, water becomes very compressible close to a phase transition.",
"The water does compress somewhat at ve... | [] | [
"http://what-if.xkcd.com/4/"
] | [
[],
[]
] | |
5v3hw9 | Why is there a need for bigger particle accelerators? If we need to accelerate a particle to a higher speed, can't we just make it go several laps? | askscience | https://www.reddit.com/r/askscience/comments/5v3hw9/why_is_there_a_need_for_bigger_particle/ | {
"a_id": [
"ddz360f",
"ddz85fn"
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"score": [
14,
2
],
"text": [
"As a charged particle accelerates, including the acceleration needed to keep the particles in a circle, it emits radiation. This energy loss causes the particle to slow down meaning you have to keep accelerating them to hav... | [] | [] | [
[],
[
"https://home.cern/about/experiments/awake",
"http://www.linearcollider.org/",
"https://fcc.web.cern.ch/Pages/default.aspx",
"http://clic-study.web.cern.ch/",
"https://fcc.web.cern.ch/Pages/About.aspx"
]
] | ||
21ojs5 | How did the beliefs of the Mongol Empire affect their development as a civilization? | It's the topic for my term paper, and I need help starting it. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/21ojs5/how_did_the_beliefs_of_the_mongol_empire_affect/ | {
"a_id": [
"cgf70x8",
"cgfeky5"
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"score": [
6,
2
],
"text": [
"Two things before I post.\n\n1)Could you specify what you mean by beliefs?\n\n2)While I'm very willing to point you in the right direction I'm not going to write your paper for you.",
"Igor de Rachewiltz is always a good... | [] | [] | [
[],
[]
] | |
17fbxj | the fight for american independence | OK- first, I am Irish with only a 'popular' understanding of how America fought for its independence from Britain. I just presumed there was the big war in which you guys won and that was it. But apparently it is a lot more complicated than that (the British re-invaded???). When I tried to look it up on the internet I ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/17fbxj/the_fight_for_american_independence/ | {
"a_id": [
"c850gl6"
],
"score": [
5
],
"text": [
"Why?\n\nCultural- By the 1770s, most people living in the British Colonies in America weren't British. Most were born in the colonies, their parents where born in the colonies. Few of these \"British Colonials\" would ever see Britain at all in t... | [] | [] | [
[]
] | |
24vpuu | How do electrons physically move from an area of low potential to an area of high potential? | I understand *why* they move to an area of high potential, I just don't understand **how** they get there. They move pretty fast, and I've never heard of any electron jet-packs or electrons having wings lol. | askscience | http://www.reddit.com/r/askscience/comments/24vpuu/how_do_electrons_physically_move_from_an_area_of/ | {
"a_id": [
"chb5gn6"
],
"score": [
4
],
"text": [
"Okay, so you've got an electron hanging out in an low potential quantum. along comes a photon. this photon happens to be the specific wavelength that has a particular amount of energy. specifically, its energy is equal to the difference in energy... | [] | [] | [
[]
] | |
1aj4ti | Did colonial powers actually benefit from the scramble for Africa? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1aj4ti/did_colonial_powers_actually_benefit_from_the/ | {
"a_id": [
"c8xypw7",
"c8ya03n"
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"score": [
8,
3
],
"text": [
"It's a mixed bag. I know more about the French colonies than the British or Portuguese (or Italian or German...). \n\nThe French controlled a lot of nothing in AOF (Afrique Occidentale Francaise) with its low population ... | [] | [] | [
[],
[]
] | ||
1g3cs9 | How is it possible that adding lemon to water makes it alkaline? | askscience | http://www.reddit.com/r/askscience/comments/1g3cs9/how_is_it_possible_that_adding_lemon_to_water/ | {
"a_id": [
"cagceic",
"caggua9"
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"score": [
3,
2
],
"text": [
"The lemon juice itself is not alkaline, it's in fact highly acidic. I think the article is trying to make the argument that once the lemon juice is processed in the body, slightly basic chemicals are products of the biochemi... | [] | [] | [
[],
[
"http://www.quackwatch.org/01QuackeryRelatedTopics/DSH/coral2.html"
]
] | ||
192lj4 | Can a drug still be addictive if the reward center
of the brain is blocked by another drug? | Piggyback question: What is the real difference between psychological and biological addiction? | askscience | http://www.reddit.com/r/askscience/comments/192lj4/can_a_drug_still_be_addictive_if_the_reward/ | {
"a_id": [
"c8k9hzv"
],
"score": [
2
],
"text": [
"Yes and it is onnected with biological addiction. Virtually all drugs are addictive. It is connected with ability of our body and cells to adapt. Happines, sadness, growth of muscles, hunger, fear, orgasm, sleep etc is done by hormones, neurotran... | [] | [] | [
[]
] | |
81exv8 | why dont electrons lose charge while they spin around the nucleus? | Doesnt spinning and orbiting nucleus cost energy? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/81exv8/eli5why_dont_electrons_lose_charge_while_they/ | {
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9,
3,
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2
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"text": [
"First, spinning in this context does not describe a mechanic act, but rather is a label applied to a fundamental attribute of the particle itself. Simply put, if its spin changed, ... | [] | [] | [
[],
[],
[],
[]
] | |
rhzlr | why music sounds distorted on telephones while voices don't | Thought of this while sitting on hold earlier... never really understood why it is that way. Or why people pay verizon money so that I can hear crashing sounds when I call them | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/rhzlr/eli5_why_music_sounds_distorted_on_telephones/ | {
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2,
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2
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"text": [
"Because music makes use of a far wider range of frequencies than our voice. It also includes bass and other things our voices don't use. Most of the technology of the phone is made... | [] | [] | [
[],
[],
[],
[]
] | |
brabkm | when you hurt your toe (for instance), why does holding the painful toe with your hands make the pain less? | Yes, I just hit my little to against the doorpost. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/brabkm/eli5_when_you_hurt_your_toe_for_instance_why_does/ | {
"a_id": [
"eobqp9k"
],
"score": [
51
],
"text": [
"It’s due to what is called the “gate control theory.” Simply put, the “ouchie” signal and the “not-ouchie” signals meet in your spinal cord, and can only send one signal to the brain. The non-painful signal (holding or touching) always wins, dam... | [] | [] | [
[]
] | |
4j76ir | Why did it take so long to discover Australia? | Colombus discovered America in 1492. Vasco da Gama did discover the sea route to India i 1498. And Magellan sailed around the world in 1522. Why didn't the Europeans "discover" Australia before 1770? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4j76ir/why_did_it_take_so_long_to_discover_australia/ | {
"a_id": [
"d34phdq"
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"score": [
3
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"text": [
"Europeans did. The Dutch first encountered the northern coast of Australia in c.1606, the western coast in 1616.\n\nThe northern encounter was a product of exploration inspired by the spice trade in the Indies, which the Dutch (like the Portugues... | [] | [] | [
[]
] | |
dwcvdu | how can surgeons skillfully perform a procedure they do only rarely? | Every surgical specialty has the procedures that are the bread and butter of its profession, and then the ones that are so rare that they only come up once or twice a year or may even only a handful of times in a career.
I'm wondering how surgeons know how to perform a procedure they do rarely? I'm thinking of it lik... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dwcvdu/eli5_how_can_surgeons_skillfully_perform_a/ | {
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"score": [
8,
20,
2,
4,
2,
3
],
"text": [
"well...if it is a procedure that's documented...it's documented. just like the repair manual of your car. maybe you've never changed... | [] | [] | [
[],
[],
[],
[],
[],
[
"https://www.reuters.com/article/us-healthcare-quality-surgery/study-suggests-surgeons-do-get-better-with-experience-idUSKBN0MT1P920150402"
]
] | |
30tuzu | My body can crave sugar, fat, and salt. What else? | Vitamins, minerals, amino acids, etc? Also, what are the biochemical mechanisms behind cravings? | askscience | http://www.reddit.com/r/askscience/comments/30tuzu/my_body_can_crave_sugar_fat_and_salt_what_else/ | {
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3
],
"text": [
"[Food cravings](_URL_0_) are too varied to posit one single mechanism, and can include craving for food, water, alcohol, nicotine, morphine and other drugs of dependency. Non-dependency cravings can include chocolate, suga... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Food_craving"
],
[]
] | |
dr1nzw | How do fish know where home is? Do they have a set place in the ocean they always come back to? | How do fish navigate the oceans, and how do they not get lost along their way? Do they have a place in the ocean they would call home and always come back to? | askscience | https://www.reddit.com/r/askscience/comments/dr1nzw/how_do_fish_know_where_home_is_do_they_have_a_set/ | {
"a_id": [
"f6fgemd"
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"score": [
11
],
"text": [
"Many organisms have magnetoreceptive organs or organelles that help them sense magnetic fields. These specialized structures have been found in numerous species of fish, birds, molluscs, insects, even bacteria. It is believed that migratory fish... | [] | [] | [
[]
] | |
d4fcpc | Was the presidential vote for George Washington actually “unanimous”? | Because the New York state legislator could not decide how to choose electors, and two electors from both Virginia and Maryland abstained from voting, does this mean that technically George Washington’s election was not, in fact, unanimous? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/d4fcpc/was_the_presidential_vote_for_george_washington/ | {
"a_id": [
"f0aw4r6"
],
"score": [
2
],
"text": [
"[This older answer](_URL_0_) might be of interest."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/9cw1o2/apparently_george_washington_won_100_of_the/e5dq196/"
]
] | |
1rygup | what makes speakers/headphones eventually start crackling? how can it be prevented? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rygup/eli5_what_makes_speakersheadphones_eventually/ | {
"a_id": [
"cds8nwi",
"cds94ma"
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"score": [
5,
3
],
"text": [
"Its the material that holds the cone. The cone is the what makes the noise. The cone is pushed by a magnet to produce the sound. Only way to prevent this is to not go over the peak power range of the speaker. The rms of the ... | [] | [] | [
[],
[]
] | ||
eunbaw | how does the scissors-curling of a ribbon you use for a gift work? are there straight fibers that get broken up in fragments? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eunbaw/eli5_how_does_the_scissorscurling_of_a_ribbon_you/ | {
"a_id": [
"ffqgmj1"
],
"score": [
29
],
"text": [
"**TL;DR:** *Different amounts of force on the ribbon's outer versus inner edge as you stretch it over your scissor blades results in one surface of the ribbon being stretched out more than the other, and that forms a permanent slight bend that b... | [] | [] | [
[]
] | ||
rpx7d | How is "traffic" through the nervous system handled? | Do certain signals i.e. pain get priority over others? Or are signals processed and/or sent/received to and from the brain on a first come first serve basis? | askscience | http://www.reddit.com/r/askscience/comments/rpx7d/how_is_traffic_through_the_nervous_system_handled/ | {
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"text": [
"This is a tricky question.\n\nA good portion of our reactions are reflex's at the spine, for example, touching a hot burner causes a reflex at the spine to mo... | [] | [] | [
[],
[],
[],
[],
[]
] | |
1kb3q7 | How/where do we find naturally occurring mercury? | Does it appear in pools on the surface of the earth? Inside geodes? Especially in large quantities, it just seems strange that it is naturally occurring...
Curiosity piqued by the frontpage post with the cannonball floating in mercury.
Thanks in advance!
Edit: Thanks, Science! Great answers. Some pokemon related... | askscience | http://www.reddit.com/r/askscience/comments/1kb3q7/howwhere_do_we_find_naturally_occurring_mercury/ | {
"a_id": [
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"score": [
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"text": [
"The liquid metal doesn't occur naturally, we extract it out of ores like [cinnabar](_URL_0_).",
"Native mercury will locally be found as tiny blebs within pockets of cinnabar within mercury deposits or mercury-bearing po... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Cinnabar"
],
[]
] | |
1tx4t0 | why do people "cringe or shake" before taking a shot of alcohol or just after they have taken one? | LIQUOR is what I'm talking about the hard alcohol not beer | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1tx4t0/why_do_people_cringe_or_shake_before_taking_a/ | {
"a_id": [
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"score": [
2,
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"text": [
"Because most alcohols taste like a dog's butt especially if they're not mixed with something. They're either sour or bitter, or sour and bitter. The human palate prefers sweet. ",
"Because they are a pussy"
]
} | [] | [] | [
[],
[]
] | |
frzm26 | what is the difference between proprioception and somatosensory? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/frzm26/eli5_what_is_the_difference_between/ | {
"a_id": [
"flyo9or"
],
"score": [
2
],
"text": [
"Proprioception is knowing where your body parts are in space. Somatosensation is simply feeling different kinds of touch on the skin."
]
} | [] | [] | [
[]
] | ||
x31hm | What is the general consensus about Traditional Chinese Medicine? | Basically, I want to know if it works or not. | askscience | http://www.reddit.com/r/askscience/comments/x31hm/what_is_the_general_consensus_about_traditional/ | {
"a_id": [
"c5iqfhb"
],
"score": [
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"text": [
"It has not been shown to work better than placebo and there is no reason to think that it should.\n\n > TCM is a pre-scientific superstitious view of biology and illness, similar to the humoral theory of Galen, or the notions of any pre-scientifi... | [] | [] | [
[
"http://www.sciencebasedmedicine.org/index.php/what-is-traditional-chinese-medicine/"
]
] | |
1s6258 | why do revolving doors exist? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s6258/eli5_why_do_revolving_doors_exist/ | {
"a_id": [
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"score": [
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"text": [
"I believe it has something to do with energy costs.\n\nIt costs money to heat a building, or to provide air condi... | [] | [] | [
[],
[],
[],
[],
[],
[],
[
"http://99percentinvisible.org/episode/revolving-doors/"
]
] | ||
5mssue | what's a byte (gigabyte, megabyte) made of and how big is it? | I feel like this requires a lot of explaining but if anyone can explain basically just what any little byte is made of, how large it is, and how it can exist without changing the weight of a hard drive...or does it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5mssue/eli5_whats_a_byte_gigabyte_megabyte_made_of_and/ | {
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"dc621vs",
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"dc6henx"
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"score": [
33,
3,
9,
3
],
"text": [
"It's not \"made up\" anything in particular. It's just a concept. A byte is a string of eight bits, and a bit is just a binary digit. A number. And it doesn't make much sense ... | [] | [] | [
[],
[],
[],
[]
] | |
3birow | What did Romans believe happened to animals when they died? | When animals died, did Romans believe they had a similar fate to humans where they went to the underworld? I realize Romans didn't really see animals like we did today, they saw them more in terms of protection and less in terms of companionship I assume, but surely they must have realized that they were alive and that... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3birow/what_did_romans_believe_happened_to_animals_when/ | {
"a_id": [
"csmhbzd"
],
"score": [
3
],
"text": [
"In Roman culture animals were usually represented by their own deities such as Lupa being the wolf God. Thus the implication is that the animals were just an extension of their god's power and were reincarnated to serve them."
]
} | [] | [] | [
[]
] | |
2txnib | Could gravitational lensing be used as a mirror to view our own Milky Way galaxy? | askscience | http://www.reddit.com/r/askscience/comments/2txnib/could_gravitational_lensing_be_used_as_a_mirror/ | {
"a_id": [
"co3c9ue"
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"score": [
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"text": [
"No. Gravitational lensing on a cosmic scale involves angular deflections of less than a degree. To get a 180 degree deflection, you light path has to go extremely close to a black hole, but if you're looking at such a tiny region then there's no ... | [] | [] | [
[]
] | ||
32b31c | why do (mostly us) hotels have showerheads mounted too low for an average height man | I'm 5'9", but the showerhead is often 3" below the top of my head, making my crouch. Were people shorter "back then" or is there some other reason? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32b31c/eli5_why_do_mostly_us_hotels_have_showerheads/ | {
"a_id": [
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"score": [
18,
5,
4,
6,
10,
2,
2,
3
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"text": [
"Go to better hotels. I'm 6'2\" and I rarely have issues with the shower in any hotel I'm p... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | |
2051gy | units like "pound feet of torque" | I understand things like MPH or Lightyears, etc, but the units in something like "lb-ft" has always been confusing to me. I've done a quick google search but I haven't found a decent explanation online. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2051gy/eli5_units_like_pound_feet_of_torque/ | {
"a_id": [
"cfztxmo",
"cg01v30"
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"score": [
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2
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"text": [
"In the case of this unit, it is simply the torque that would be produced by placing one pound 1 foot away on a lever. \n\nImagine if you held a 12\" ruler by the very end between your thumb and forefinger. If you add a 1 lb ... | [] | [] | [
[],
[]
] | |
4simlq | During World War 1, did the trenches extend uninterrupted for the whole length of the front, or did they have ends? What happened to the trenches when they reached the alps or the English Channel? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4simlq/during_world_war_1_did_the_trenches_extend/ | {
"a_id": [
"d59jysn"
],
"score": [
4
],
"text": [
"These are pictures of the [Swiss border] (_URL_0_) and the [Belgian coast] (_URL_2_), where the trenches of the Western Front did in fact come to an end. Of course it should be noted that the construction of the trenches varied based on the topog... | [] | [] | [
[
"http://www.firstworldwar.com/photos/graphics/gws_gertrenchswiss_01.jpg",
"https://www.reddit.com/r/AskHistorians/comments/41adfu/wwi_trenches/",
"http://farm9.staticflickr.com/8087/8481825367_48ed4f71ab_z.jpg"
]
] | ||
1k23kk | the sun's magnetic field | So with all this hubbub about the Sun's magnetic field shifting, it occurred to me that I'm not entirely sure what a magnetic field is, let alone why or how it shifts.
So I guess my actual requests would be:
-What is the Sun's magnetic field?
-How different is it from Earth's aside from obvious things like size?
-Why... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1k23kk/eli5_the_suns_magnetic_field/ | {
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"score": [
4,
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5,
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"text": [
"First, a magnetic field is an in invisible \"field force\" simply meaning something applies force to something else. Another example of a field force is gravity. The difference be... | [] | [] | [
[],
[],
[],
[]
] | |
2jyneo | why do i hear about violence in the islamic world but not in the hindu or buddhist world? | Hindus and Buddhists were colonized and exploited by western powers for centuries as well yet how come they don't hate the west enough to resort to terrorism like many Islamists? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2jyneo/eli5_why_do_i_hear_about_violence_in_the_islamic/ | {
"a_id": [
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"score": [
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3,
2,
2,
2
],
"text": [
"There are over a billion Muslims in the world, practically a 6th of the world's population. The vast majority don't \"hate the west\".\n\nHindu terrorism and... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Category:Hindu_terrorism",
"http://en.wikipedia.org/wiki/Christian_terrorism",
"http://en.wikipedia.org/wiki/Buddhism_and_violence"
],
[],
[],
[],
[]
] | |
6ws6kq | how do we know north korea is "testing" a missile launch over japan, and not firing an actual warhead at them? | Do we know it's a test at the time of the launch? Can we calculate the target or so we have to wait and see where it goes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ws6kq/eli5_how_do_we_know_north_korea_is_testing_a/ | {
"a_id": [
"dmba6om"
],
"score": [
2
],
"text": [
"They don't until the missile lands. This is why North Korea's provocative tests are so provocative, since nobody can be 100% sure there is no warhead. The missile can be tracked and where it will go estimated, but missiles can change directions. ... | [] | [] | [
[]
] | |
6w8u70 | How did the border between Scotland and England come to be? | As everyone in Britain knows, Hadrian's Wall is significantly further south. Moreover, the border between Old English and Pictish / Gaelic, and between the English and Celtic kingdoms, was [significantly further northeast](_URL_0_). So how did we get this relatively straight and clean border? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6w8u70/how_did_the_border_between_scotland_and_england/ | {
"a_id": [
"dm9hc3v"
],
"score": [
2
],
"text": [
"I mean the short answer to this is the same way we get a lot of borders: culture and politics and treaties and relatively arbitrary agreements about landholding.\n\nIt's also really complicated because of the presence of Romans, Gaels, Picts, Ang... | [] | [
"http://martinweisser.org/courses/lexicology/history.html"
] | [
[
"https://www.reddit.com/r/AskHistorians/comments/4c9soe/why_and_when_did_scots_start_speaking_english_and/"
]
] | |
3lfsgu | The Italian renaissance was a golden age for elites, but what was life like for the middle and lower class? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3lfsgu/the_italian_renaissance_was_a_golden_age_for/ | {
"a_id": [
"cv6g2t9"
],
"score": [
49
],
"text": [
"Narrative sources from the period tend to focus on the wealth and splendor of Renaissance culture in Renaissance cities (not always positively), but a few explorations of Italy's surprisingly rich archives paint a more complicated picture.\n\nTh... | [] | [] | [
[
"http://www.bartleby.com/20/133.html"
]
] | ||
3znuxp | what does the north korea nuclear weapon testing mean for the rest of the world? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3znuxp/eli5_what_does_the_north_korea_nuclear_weapon/ | {
"a_id": [
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14,
4,
2
],
"text": [
"First problem is that NK having nuclear weapons combined with the fact that one dictator with no one to put him in check is in control of them means that he could lose it one day and hit SK or China wi... | [] | [] | [
[],
[],
[]
] | ||
44czgp | why is there a mass refugee problem right now from dozens of countries? wasn't this originally because of syria attacking their own people? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/44czgp/eli5_why_is_there_a_mass_refugee_problem_right/ | {
"a_id": [
"czpbnua",
"czpcr2x"
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"score": [
3,
2
],
"text": [
"There were a lot of refugees from those countries you listed before Syria, however when the waves of Syrians came, a lot of other people saw it and thought this was their chance to start a better life. If these European coun... | [] | [] | [
[],
[]
] | |
st300 | If the metric system is superior, why doesn't anyone advocate 100 degrees in a circle instead of 360? | I get that 360 was chosen for easy divisibility, and because of the relation to earth's orbit. But it seems kind of arbitrary? | askscience | http://www.reddit.com/r/askscience/comments/st300/if_the_metric_system_is_superior_why_doesnt/ | {
"a_id": [
"c4gqk4f"
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"score": [
7
],
"text": [
"Part of the answer is, most people who use angle measurements seriously in the fields of mathematics and science are using radians. A radian is essentially the angle you make when going a distance around the edge of the circle equal in length to ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Radians#Advantages_of_measuring_in_radians"
]
] | |
669t3d | how did video game developers test their games in the days of cartridges? | Being an aspiring programmer I think about all the times I hit "compile", and it makes me wonder how developers back in the Atari and the NES days didn't go bankrupt printing off test carts for the latest version of the game. Especially third party developers who didn't work on the hardware itself, and who I assume cou... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/669t3d/eli5_how_did_video_game_developers_test_their/ | {
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"dggqh3q",
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"score": [
6,
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3,
3
],
"text": [
"Do you have to burn a DVD every time you want to test the latest iteration of whatever you're working on? \n\nThey ran the tests on the development machines they were working on. ... | [] | [] | [
[],
[],
[],
[
"https://www.youtube.com/watch?v=GH94fKtGr0M"
]
] | |
1q97xp | In 300 A.D., what language would your average inhabitant of Gaul speak? How about a Gallic aristocrat? | Since modern French is a romance language, was Latin the dominant language, or were other languages spoken? Did different classes speak different languages? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1q97xp/in_300_ad_what_language_would_your_average/ | {
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11
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"text": [
"I'd ask that in /r/linguistics. They're really great when it comes to those questions. I've seen people linking an AskHistorians thread there before so the comments are all in... | [] | [] | [
[],
[],
[],
[
"http://upload.wikimedia.org/wikipedia/commons/f/f6/Coligny-closeup.jpg"
]
] | |
4xnkl8 | Did majority of women in medieval Islam not wear hijab? I ask this because majority of women in 20th century Muslim countries do not wear hijab until recently | Before the Iranian 1979 revolution, majority of women in Muslim majority countries do not wear veil or hijab. You can see [in this album](_URL_1_).
I'm not implying which is better. This change of trend just makes me curious. Back then in medieval Islam ages, were there also similar tren--majority of women not wearing... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4xnkl8/did_majority_of_women_in_medieval_islam_not_wear/ | {
"a_id": [
"d6h1xdm",
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"d6h4q8j",
"d6h89vt",
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"d6hcx71"
],
"score": [
148,
19,
349,
72,
66,
12,
5
],
"text": [
"Follow-up question:\n\nWe see these albums posted often, to show us how different the attitudes of the mus... | [] | [
"http://www.pewresearch.org/fact-tank/2014/01/08/what-is-appropriate-attire-for-women-in-muslim-countries/",
"http://imgur.com/a/HbN0n"
] | [
[],
[],
[
"http://www.pewresearch.org/fact-tank/2014/01/08/what-is-appropriate-attire-for-women-in-muslim-countries/",
"https://www.twitter.com/everydayiran/status/555636905786609666",
"https://www.reddit.com/r/AskHistorians/comments/48dfpw/do_the_ubiquitous_photos_of_iran_prior_to_the/"
],
[],
... | |
7twto7 | Fact check WW2 Warning leaflets | Just wondering if this actually happened. Post doesn't seem right to me.
Photo describes two leaflets dropped on Japan to warn the people.
_URL_0_ | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7twto7/fact_check_ww2_warning_leaflets/ | {
"a_id": [
"dtfz3gw",
"dtgn2ol"
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"score": [
6,
3
],
"text": [
"u/restricteddata has posted about this numerous times, such as [this thread](_URL_0_). The linked post to his blog covers the subject in depth.",
"The post is highly misleading (and is probably my least-favorite atomic b... | [] | [
"https://imgur.com/a/cBtii"
] | [
[
"https://www.reddit.com/r/AskHistorians/comments/69st74/why_did_the_us_decide_to_bomb_civilian_cities/dh9lk0w/?context=2"
],
[
"http://blog.nuclearsecrecy.com/wp-content/uploads/2013/04/1946-History-Psychological-Warfare-Manhattan-Project.pdf"
]
] | |
1r0p8h | what are organic photovoltaic solar cells? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1r0p8h/eli5_what_are_organic_photovoltaic_solar_cells/ | {
"a_id": [
"cdigzqt"
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"score": [
2
],
"text": [
"Solar cells utilize a class of materials known as semiconductors to absorb light and generate electrical power. Conventional semiconducting materials used in solar cells are derived from single elements (silicon & germanium) or combinations of... | [] | [] | [
[]
] | ||
9qoxs7 | do the lungs of a fetus do oxygen/co2 exchange in utero, and how does a newborn go from not needing to "breathe" air in the "normal" sense (while in the amniotic sac) to suddenly needing to breathe room air after being born? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9qoxs7/eli5_do_the_lungs_of_a_fetus_do_oxygenco2/ | {
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"score": [
2,
59,
3,
3
],
"text": [
"All oxygen perfusion to the cells occurs through the umbilical cord until birth. Upon delivery, the neonate expelled the amniotic fluid and starts to breath air for oxygenation. "... | [] | [] | [
[],
[],
[],
[
"https://www.youtube.com/watch?v=8WX0POOZhvE"
]
] | ||
dmb1l0 | how are compact cameras able to deliver a better optical zoom with similar quality than a dslr camera? | I jumped on the dslr train about 7 years ago but was disappointed by the lack of versatility, unless you dump thousands of dollars into lenses. My mother, on the other hand, bought a $400 compact Sony camera and it vastly outshines my Nikon DSLR. She gets 30x optical zoom whereas to get something similar for my camera,... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dmb1l0/eli5_how_are_compact_cameras_able_to_deliver_a/ | {
"a_id": [
"f4yzt59",
"f4z0m35"
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"score": [
2,
5
],
"text": [
"Example video:\n\n**Excuse the quality for a few minutes while Google processes it. Normally it's excellent quality. It should be 1080p.**\n\n[_URL_0_](_URL_1_)",
"Smaller sensor. Compact cameras usually have a 2/3 inch ... | [] | [] | [
[
"https://drive.google.com/open?id=1uASA5AxdhuuObI\\_4SL5ts8\\_X4Gwi2nQh",
"https://drive.google.com/open?id=1uASA5AxdhuuObI_4SL5ts8_X4Gwi2nQh"
],
[]
] | |
sfuxu | Why didn't advanced civilizations like the Romans think to travel across the Atlantic? | They did, apparently know the earth was round. So why didn't they head that way? Is there any evidence that other people besides the Vikings and Native Americans discovered the Americas before Columbus? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/sfuxu/why_didnt_advanced_civilizations_like_the_romans/ | {
"a_id": [
"c4don84",
"c4doqow",
"c4dosx6",
"c4dougi",
"c4dp8hq",
"c4dpkq4",
"c4dpvin",
"c4dr835",
"c4dtblt"
],
"score": [
5,
17,
14,
7,
67,
4,
2,
3,
3
],
"text": [
"Layman here, but didn't the Roman ships require hundreds of people ... | [] | [] | [
[],
[],
[],
[],
[],
[
"http://en.wikipedia.org/wiki/John_Cabot",
"http://www.sacred-texts.com/earth/pi/pi17.htm"
],
[],
[
"http://en.wikipedia.org/wiki/Pre-Columbian_trans-oceanic_contact"
],
[]
] | |
6bijjc | Did any other civilization attempt to recreate Greek Fire? Were any successful? | [On Björn Ironside's wikipedia page, there is a bit where it says that Björn and his navy fought the Arabs near Gibraltar. He lost the battle and 40 ships, due to the Arabs using "Greek Fire".](_URL_0_) I always read that the Byzantines kept the recipe for Greek Fire a really well-guarded secret, which was lost with th... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6bijjc/did_any_other_civilization_attempt_to_recreate/ | {
"a_id": [
"dhpkqqf"
],
"score": [
3
],
"text": [
"Greek fire is often used as a general term for any incendiary weapon. The greek fire used by the arabs was most likely not the greek fire of the byzantines."
]
} | [] | [
"https://en.wikipedia.org/wiki/Bj%C3%B6rn_Ironside#Histories"
] | [
[]
] | |
3q4puz | why would someone pay the electric company to install solar panels on their home? | I'm noticing my neighbors taking advantage of promotions offered by the electric company to install solar panels on their home. you want solar the electric company isn't your only option. Why would someone purchase the liberator of a resource from the supplier of that reasource? Isn't it like hiring your your lawyer... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3q4puz/eli5_why_would_someone_pay_the_electric_company/ | {
"a_id": [
"cwc0r7o",
"cwc0tm8"
],
"score": [
3,
2
],
"text": [
"At least in France, the electricity you produce through solar panels is \"sold\" to the company. I think you use it directly but you pay less for your electricity. It's more an agreement than a potential conflict of interest... | [] | [] | [
[],
[]
] | |
1s9qv1 | when stopped by police, why do police always ask where you have come from and where you are going? | They alwayd ask this and it seems irrelevant to a seatbelt check point or being pulled over for a minor traffic violation. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s9qv1/eli5_when_stopped_by_police_why_do_police_always/ | {
"a_id": [
"cdvbzd6",
"cdvj10n"
],
"score": [
3,
2
],
"text": [
"They want you to talk to see if you slur your speech or are confused, indicating intoxication.",
"I work with a lot of cops, and have had many interactions with them on the other side of the law. Why they ask is to see i... | [] | [] | [
[],
[]
] | |
22jrl3 | What would you see if you painted something ultraviolet or infrared? | If you were to paint something with an ultraviolet coloured paint or an infrared coloured paint, what would our eyes see?
Would you see through it or would it just appear what colour it was closest to in the spectrum? | askscience | http://www.reddit.com/r/askscience/comments/22jrl3/what_would_you_see_if_you_painted_something/ | {
"a_id": [
"cgnjpn1"
],
"score": [
4
],
"text": [
"Our eyes only see visible light, so the answer depends completely on how your paint interacts with light in the visible spectrum. \n\nTo be clear, there's no such thing as \"ultraviolet colored paint.\" All materials interact with all light wavel... | [] | [] | [
[
"http://larvalsubjects.files.wordpress.com/2011/10/dandeliondm_ultraviolet_light.jpg"
]
] | |
550ol4 | how can the president giveaway us control of internet without congress approval | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/550ol4/eli5_how_can_the_president_giveaway_us_control_of/ | {
"a_id": [
"d86kowe"
],
"score": [
2
],
"text": [
"The US doesn't control the internet. In fact it doesn't even do anything with it's current authority, not that is could. Giving up it's oversight is nothing but a formality where literately nothing will change about how the internet is used.\n\nI... | [] | [] | [
[]
] | ||
15ho0h | How exactly do flutes work, and other wind instruments? | I know how you're supposed to play wind instruments, but
1. Why are different types of breath support utilized for different notes?
2. Why are low notes (like middle C) so much harder for a beginner player to play than a higher note (like Bb), and why are the REALLY high notes also hard to play?
3. How do fingerings... | askscience | http://www.reddit.com/r/askscience/comments/15ho0h/how_exactly_do_flutes_work_and_other_wind/ | {
"a_id": [
"c7mmssb"
],
"score": [
3
],
"text": [
"I'll take the 3rd one (Electrical Engineer Grad Student here). Changing fingerings changes the effective size of the resonant chamber that's attached to the mouthpiece/reed. Wind instruments make tones by dumping noise (term for lots of tones) i... | [] | [] | [
[]
] | |
4y541a | why do countries adapt central bank systems? | Based on what I know it seems like a terrible system, yet many countries seem to have it. What are the pros of these systems? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4y541a/eli5_why_do_countries_adapt_central_bank_systems/ | {
"a_id": [
"d6l0p9n",
"d6l0zdy"
],
"score": [
2,
2
],
"text": [
"What makes you think its a terrible system?\n\nA central bank is in charge of the monetary policy of a country which means it controls the availability of money to help the economy. \n\nIn bad economic times it tries to make... | [] | [] | [
[],
[]
] | |
3o8uqo | Are there other types of disaccharides? beyond glucose, lactose, and maltose | I understand the formation of glucose, lactose, and maltose? But are there other disaccharides out there that are double fructose or possibly a fructose + galactose?
Thanks! | askscience | https://www.reddit.com/r/askscience/comments/3o8uqo/are_there_other_types_of_disaccharides_beyond/ | {
"a_id": [
"cvvf1v8"
],
"score": [
3
],
"text": [
"First, glucose is a monosaccharide. [Wikipedia has a list of common disaccharides](_URL_0_). Galactose and fructose is melibiulose. Of course, this is a basic list and doesn't include all the various forms of monosaccharides like glucoseamine.... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Disaccharide#Common_disaccharides"
]
] |
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