q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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3p242j | what's the point of a hov lane? why not just let everyone use it to prevent traffic backups? | There's a lot of highways around here that are 3 lanes wide, with one being a hov lane, that you have to pay for, why not just open that lane to everyone and have 33% more road for drivers? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3p242j/eli5_whats_the_point_of_a_hov_lane_why_not_just/ | {
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"It's to provide an incentive for people to carpool. If more people had 2-3 passengers in their cars, that would make the regular lanes less congested.",
"1. Because you would have 50% more. \n\n2. ... | [] | [] | [
[],
[],
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7hoqhc | How much current USD would five shillings in 1659 Massachusetts Colony be worth? | Say you were an average inhabitant of the colony and had five shillings tucked away. If that were a modern day savings account how much would you have? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7hoqhc/how_much_current_usd_would_five_shillings_in_1659/ | {
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"At the time, they were using the 62 shillings per pound, and a penny weighed 7 23/31 grains. A shilling was 12 pence. \n\n5 shilling = 60 pence. \n\n60p = about 464.52 grains.\n\n464.62 grains = 1.061989oz\n\nCurrent silver ... | [] | [] | [
[],
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] | |
g6k4t | How can I determine the frequency of a ray of colored light? | Hello everyone. I want to determine the frequency of a ray of colored light. The visible light spectrum is about 405 THz to 790 THz, so if I take a red beam of light and shine it, I want to know that its frequency is ~700 THz.
Example of what I'm looking for - a sensor that, when light is shone on it, will output an e... | askscience | http://www.reddit.com/r/askscience/comments/g6k4t/how_can_i_determine_the_frequency_of_a_ray_of/ | {
"a_id": [
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"Depending on the accuracy you require, you could also have a linear sensor and a prism. The prism will bend the light by an amount predictably related to the wavelength, meaning that different frequencies will be deflected t... | [] | [] | [
[
"http://imgur.com/elTlq"
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"http://www.oceanoptics.com/Products/usb2000.asp",
"http://images-mediawiki-sites.thefullwiki.org/04/3/7/0/37449961459457742.gif"
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1o2787 | How and why exactly was the technology of the Roman Empire lost to the rest of the world in the period of the Late Antiquity | Me and a friend at work had a discussion yesterday and it intrigued me. Rome had influence on areas that would later become places like France, Germany and even Britain.
They could make concrete structures like the coliseum which is of better quality than todays Concrete. They had indoor plumbing ..
They did things ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1o2787/how_and_why_exactly_was_the_technology_of_the/ | {
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"text": [
"What you're referring to is the Dark Age theory, which doesn't really hold much sway anymore. I'm sure if you dig around the popular question section you'll find some other in depth posts about this issue, but I'll sum some of it up here:\n\nBasi... | [] | [] | [
[]
] | |
2raj77 | what does goldman sachs have to do with the eurozone and why do they seem to be such a big player in it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2raj77/eli5_what_does_goldman_sachs_have_to_do_with_the/ | {
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"text": [
"Last I checked, an ex Goldman Sachs employee ran the European Central bank. So that's fairly significant.",
"Basically, Goldman Sachs helped to mask greeces debt.\n\n_URL_0_",... | [] | [] | [
[],
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"http://www.spiegel.de/international/europe/greek-debt-crisis-how-goldman-sachs-helped-greece-to-mask-its-true-debt-a-676634.html"
],
[],
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] | ||
3inl4f | why does putting a spoon in the top of a bottle champagne, bear ect. keep the fiz in the bottle even over night | a friend told me about this. it worked. and now im just confused and have more questions than i thought i would have for asking how to keep a beer from going flat. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3inl4f/eli5why_does_putting_a_spoon_in_the_top_of_a/ | {
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"text": [
"It doesn't. Sparkling wine keeps its fizz for longer than most people realise so the spoon trick appears to work even though it has no effect b",
"1. The spoon in champagne theory has not really been confirmed scientifi... | [] | [] | [
[],
[]
] | |
47k2x0 | are there accounting and investor-related benefits to hiring contractors instead of employees? | Not interested in the employee cost savings, which has been covered in previous posts. But more the accounting and investing reporting reasons why having less headcount and more contractors would be beneficial to a large company. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/47k2x0/eli5_are_there_accounting_and_investorrelated/ | {
"a_id": [
"d0dhnrj"
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"text": [
"Depending how contractors are paid, there could be a cash flow benefit. Most employees expect regular payments. Many contacts are set up in such a way that much of the payment is deferred to the completion date. "
]
} | [] | [] | [
[]
] | |
4gvvp9 | can blind people see light? | I mean... when you look at the sun, you look away because it is too bright. Do blind people have the same reaction as well? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4gvvp9/eli5can_blind_people_see_light/ | {
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"text": [
"It depends on how blind they are (there are degrees of blindness). Some people can see light/dark or shadows, some can see certain areas of their vision but not others, some can't see anything at all, so the answer is both yes and no."
]
} | [] | [] | [
[]
] | |
d0ng4e | AskHistorians Episode 140 - The International Brigades in the Spanish Civil War | [**Episode 140 is up!**](_URL_8_)
The [AskHistorians Podcast](_URL_10_) is a project that highlights the users and answers that have helped make r/AskHistorians one of the largest history discussion forums on the internet. You can subscribe to us via [iTunes](_URL_9_), [Stitcher](_URL_7_), or [RSS](_URL_5_), and now o... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/d0ng4e/askhistorians_episode_140_the_international/ | {
"a_id": [
"ezcz174"
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"text": [
"Thanks u/Bernardito! \n\nIf anyone has any questions or comments about the topics covered, I'm happy to address them here! Or, you know, you can ask a question on the main sub."
]
} | [] | [
"https://journals.sagepub.com/doi/abs/10.1177/0022009419865005?journalCode=jcha",
"https://www.reddit.com/r/AskHistorians/comments/c3ihzz/askhistorians_episode_139_bibliography_of_the/",
"https://soundcloud.com/user679855208",
"https://www.youtube.com/channel/UCJudPwztZyg2BQjhetw_bww",
"https://www.patreon.... | [
[]
] | |
8s2g3u | Why doesn't a moving massive object within a black hole's event horizon affect the gravitational force of the black hole (including said object) felt by observers outside the event horizon? | Consider Alice, drifting just outside the event horizon, and Bob, located 1 meter away, just inside the event horizon. As Bob starts drifting towards the center of the black hole, the distance between him and Alice increases and one would think that the gravitational force experienced by Alice (caused by Bob and the bl... | askscience | https://www.reddit.com/r/askscience/comments/8s2g3u/why_doesnt_a_moving_massive_object_within_a_black/ | {
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"text": [
"Hi, so, I hate to say it, but the other answers here are wrong, and so is your assumption: you absolutely would continue to detect the modified field as an object plummets to the singularity.\n\nBefore we dive in, let me ask you three questions:... | [] | [] | [
[]
] | |
1wcfnp | Recommended Reading For the Dutch Golden Age? | I did not see anything in the book list, apologies if I missed it. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1wcfnp/recommended_reading_for_the_dutch_golden_age/ | {
"a_id": [
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"text": [
"Are there any particular areas you're interested in?\n\nFor a hefty general text, Jonathan Israel's 'The Dutch Republic: Its Rise, Greatness and Fall' is worth a read.\n\nA good politically-focused book is Maarten Prak's 'The Dutch Republic in th... | [] | [] | [
[]
] | |
721ywa | how can a cable possibly be stretched across the entire atlantic ocean? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/721ywa/eli5_how_can_a_cable_possibly_be_stretched_across/ | {
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"text": [
"Very long cables, carried out on large vessels. They lay on the ocean floor where they dont see too much marine life. Even so, they have a thick casing to guard against animal curi... | [] | [] | [
[],
[],
[],
[
"https://www.wired.com/1996/12/ffglass/"
]
] | |
atmzhx | Why do many Gaulish Names end in -ix? | I assume that this is not entirely true to the degree that it is in *Asterix*, but many names of famous people in the Gaulish times of Caesar ended in -ix, such as Vercingetorix, Dumnorix, and Orgetorix. Was it just a common suffix, or was it some sort of honor given to a leader? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/atmzhx/why_do_many_gaulish_names_end_in_ix/ | {
"a_id": [
"eh25jg8"
],
"score": [
3
],
"text": [
"/u/Astrogator answered this [here](_URL_0_)."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/7d0bqr/is_the_common_suffix_ix_on_the_end_of_gallic/"
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4fonzq | the uk investigatory powers bill | What exactly is it? And how exactly does it affect technology users in the UK? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4fonzq/eli5the_uk_investigatory_powers_bill/ | {
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"text": [
"It's a bill to allow the government to retain the browsing history of everybody in the UK for at least a year, without suspicion or probable cause.\n\nIt's being championed by Theresa May, someone who is demonstrably incompetent and also the quee... | [] | [] | [
[]
] | |
2efdek | What is the difference between blood pressure and peripheral vascular resistance? | Hi guys, I know this seems like a pretty basic question but it's tying me up in knots - can anyone help explain this to me? Thanks! | askscience | http://www.reddit.com/r/askscience/comments/2efdek/what_is_the_difference_between_blood_pressure_and/ | {
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"text": [
"Blood pressure (mean) = cardiac output (amount of blood pumped over time) x peripheral vascular resistance.\n\nCardiac output = stroke volume of each heart beat * heart rate.\n\nSo BP will increase with PVR but PVR isn't the... | [] | [] | [
[],
[]
] | |
3mgr04 | Was the "Southern Strategy" during the U.S. civil rights movement a real thing or a myth? | Contemporary republicans and conservatives will often swear up and down that the southern strategy is a myth, claiming that liberals are and always have been responsible for most of the racism in this country. They then usually cite the fact that Lincoln was a republican. So was the southern strategy real or a myth? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3mgr04/was_the_southern_strategy_during_the_us_civil/ | {
"a_id": [
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"text": [
"Not to discourage conversation here, but the FAQ has several good [threads](_URL_1_) on this topic, including several great answers from /u/Samuel_Gompers [here](_URL_2_) and [here](_URL_0_).",
"What was the southern st... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/12vvo4/how_and_when_did_the_republican_party_transition/",
"https://www.reddit.com/r/AskHistorians/wiki/us_history#wiki_changing_role_of_republicans_and_democrats",
"https://www.reddit.com/r/AskHistorians/comments/yczua/can_someone_address_a_brief_histo... | |
5b2bpj | why do we consider electric cars "green" if we need fossil fuel to produce electricity ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5b2bpj/eli5_why_do_we_consider_electric_cars_green_if_we/ | {
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"There are other ways to produce electricity - solar, wind, hydro, nuclear.\n\nAdditionally, even fossil-fuel power plants are more eff... | [] | [] | [
[],
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qmg6j | why the prices of milk are like this (pic inside) | At my local Walmart, the prices of milk have been weird for the last 3 months. It used to be for 2% milk, the prices for gallons and half gallons were [$2.43 for a half gallon, and $2.39 for a full gallon.](_URL_1_) At first I thought something along the lines of "Well, they must have gotten a lot more full gallons in ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/qmg6j/eli5_why_the_prices_of_milk_are_like_this_pic/ | {
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"text": [
"Relate it to Coke bottles:\n20oz bottle: $1.50\n-Easy to carry and drink quickly\n-Fit in cup holders\n-Convenient\n-Good for on the go\n\n68oz (2liters): $1.09\n-Large, bulky\n-U... | [] | [
"http://imgur.com/a/rqzOm#1",
"http://imgur.com/a/rqzOm#0"
] | [
[],
[],
[],
[]
] | |
2euh4b | Why does a cigarette's paper burn through fast when its empty but slow when there's tobacco inside? | askscience | http://www.reddit.com/r/askscience/comments/2euh4b/why_does_a_cigarettes_paper_burn_through_fast/ | {
"a_id": [
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"text": [
"Increased airflow. When it is filled with tobacco, there is not a lot of air (and so oxygen) *inside* the cigarette (because its stuffed with tobacco). Less oxygen results in a slower burn. \n\nWhen there is no tobacco whats there instead is air.... | [] | [] | [
[]
] | ||
21tiua | "Every star you see in the night sky is bigger and brighter than our sun." Is this true? | I've read this a few days ago and I can't seem to find any sources behind this statement, so is this true? Especially this with brightness?
EDIT: Of course, without telescope.
**EDIT2: Thank you guys, I now know not to take 'mind-blowing facts' from internets seriously.** | askscience | http://www.reddit.com/r/askscience/comments/21tiua/every_star_you_see_in_the_night_sky_is_bigger_and/ | {
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"I'm not sure if this counts because it's a binary star system, but [Alpha Centauri B](_URL_0_) is a bit smaller and less luminous than the Sun, but Alpha Ce... | [] | [] | [
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"http://en.wikipedia.org/wiki/Alpha_Centauri"
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[],
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"http://en.wikipedia.org/wiki/Stellar_classification#Harvard_spectral_classification",
"http://en.wikipedia.org/wiki/Epsilon_Eridani"
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[
"http://en.wikipedia.org/wiki/Stellar_evolution",
"http://en.wikipedia.org/wiki/Stellar_cl... | |
4b4e9y | Did the Nazis ever release English-language propaganda, or attempt to appeal to English-language media as it became obvious a greater rift was growing between them and UK/USA/Canada/etc? | I guess I'm mainly referring to pre-war, but stuff during the war is absolutely fine too. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4b4e9y/did_the_nazis_ever_release_englishlanguage/ | {
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"There were a couple English-language propagandists. William Joyce, aka Lord Haw Haw, is likely the most well-known. He would broadcast English-language propaganda from Berlin to London airwaves from 1939 until his capture in 1945. [The BBC actu... | [] | [] | [
[
"http://www.history.com/news/history-lists/6-world-war-ii-propaganda-broadcasters",
"https://books.google.com/books?id=nvRNx6YM7LIC&lpg=PP1&dq=Lord%20Haw%20Haw&pg=PP1#v=onepage&q=Lord%20Haw%20Haw&f=false",
"http://www.bbc.co.uk/archive/hawhaw/index.shtml"
]
] | |
40cp4o | what does "safely remove hardware and eject media" do to make it "safe"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/40cp4o/eli5_what_does_safely_remove_hardware_and_eject/ | {
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"text": [
"It prevents the computer from trying to write to the media while it is being physically removed. If it's removed while the computer it trying to write to it, it can damage all the data on the disc.",
... | [] | [] | [
[],
[],
[]
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3scj0j | what is end-to-end encryption that everybody is talking about with regards to the uk and how does passing that bill to end it effectively be a bad thing? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3scj0j/eli5_what_is_endtoend_encryption_that_everybody/ | {
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"End to end encryption means that the data get encrypted before it is ever transmitted, and not decrypted until after it is received on the other end. This is the only way to guarantee that it's protected from somebody listening in somewhere in be... | [] | [] | [
[]
] | ||
2q3quu | How do I know if what I'm looking at is a star or a galaxy? | Like in general on a dark clear night, is there a way to differentiate between the two just with the naked eye? | askscience | http://www.reddit.com/r/askscience/comments/2q3quu/how_do_i_know_if_what_im_looking_at_is_a_star_or/ | {
"a_id": [
"cn39fb2"
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"score": [
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"text": [
"There are only a few galaxies you can see with your naked eye. Andromeda (M31) and the Magellanic Clouds being the only ones a typical untrained observer will ever see or notice. All three are fuzzy blobs of varying size. It is possible to confus... | [] | [] | [
[]
] | |
5xw0af | if transubstantiation means the body of christ is being eaten, doesn't that mean it's cannibalism? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5xw0af/eli5_if_transubstantiation_means_the_body_of/ | {
"a_id": [
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"text": [
"Not exactly. Denominations that believe in transubstantiation also don't think that Christ was merely human, but in fact the son of God. This includes the belief that he is *consubstantial*, that is, made of the same essence, as God the father. T... | [] | [] | [
[]
] | ||
eyh4z4 | why, in todays high tech age, do we still use film stock and lenses for movies and pictures, when it could all be done on a computer? | People spend tens of thousands on anamorphic lenses and such, when you could just film in 4K, add a lens flair filter, and crop it to desired ratio. Clearly im missing something | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eyh4z4/eli5_why_in_todays_high_tech_age_do_we_still_use/ | {
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"text": [
"Many people feel that using traditional filming methods makes the movies look better, as they prefer the way images appear when filming on film stock rather than going digital. E... | [] | [] | [
[],
[],
[],
[
"https://parlaystudios.com/blog/feature-film-budget-breakdown/",
"http://annawu.com/blog/wp-content/uploads/2011/08/focal-length-comparison.jpg",
"https://www.bhphotovideo.com/explora/video/features/anamorphic-lenses-key-widescreen-cinematic-imagery"
]
] | |
2rdeen | why doesn't one horse equal one horsepower? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rdeen/eli5_why_doesnt_one_horse_equal_one_horsepower/ | {
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"text": [
"Because horses are not mass-produced at standardized specifications.\n\nIt's the same reason your foot isn't one foot long.",
"Watt (Yeah, that Watt) measured that a brewery horse could pull 32,400 foot pounds per minute... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Horsepower"
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6skosl | outside of academia, who employs modern philosophers and what is their role in modern society? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6skosl/eli5outside_of_academia_who_employs_modern/ | {
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"I'd say lots of them write books and/or articles and essays which they sell to magazines or even get invited to tv talk shows to discu... | [] | [] | [
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"https://www.reddit.com/r/explainlikeimfive/comments/5q99r6/eli5_how_do_philosophers_make_money_how_did_they/"
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[],
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] | ||
3i9kam | how does companies like steam get away with not charging sales tax? | The only explanation I came up with is the game is free, but you just buy the license. Is this correct? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3i9kam/eli5_how_does_companies_like_steam_get_away_with/ | {
"a_id": [
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"text": [
"Depending on where you live, they **do** charge sales tax. Here's what that looks like from a purchase in Illinois: _URL_0_",
"Sales tax is for the state in which the item is purchased. Until recen... | [] | [] | [
[
"http://i.imgur.com/qswCv1G.png"
],
[],
[]
] | |
1h3827 | Would bees in flight add to the weight of an enclosed box? | I asked this question on [this post](_URL_0_) and was told to askscience.
If I have a box of bees that are constantly in flight, would they cause the box to weigh more than if it was empty? I know that air has weight and the bees would displace that air but I can't work out if they would make any difference in the wei... | askscience | http://www.reddit.com/r/askscience/comments/1h3827/would_bees_in_flight_add_to_the_weight_of_an/ | {
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"text": [
"Yes.\n\nInstead of bees, imagine a much bigger box with an Apache gunship hovering inside. The massive downward pressure generated by the blades of the chopper would add to the weight of the box, at least until all the oxyge... | [] | [
"http://www.reddit.com/r/AskReddit/comments/1h2ksa/what_are_some_questions_that_youve_never_asked/"
] | [
[],
[]
] | |
2uq22b | why is the hydrogen car not getting more attention? | When I read that Toyota released the Miraj, they said it runs on hydrogen, is cheaper than petrol and emits clean exhaust fumes.
I thought this would be a huge thing and great for the world etc. But there is nothing else coming out and no media or internet fanfare.
Is this not a viable alternative to petrol cars? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2uq22b/eli5_why_is_the_hydrogen_car_not_getting_more/ | {
"a_id": [
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"There are a couple of really big drawbacks to the hydrogen car with current technology. The first is hydrogen storage. Although hydrogen has a terrific energy density for it's weight (1 pound of hydrogen has ~3x the energy of 1 pound of gasolin... | [] | [] | [
[]
] | |
gc7n9 | How accurate is this post on the Japanese nuclear radiation issue? | [This post](_URL_1_) specifically, as people seem to be upvoting it slowly but surely. It originates from a [Counter-Punch](_URL_0_) post, so that might explain some things. But regardless, I'm wondering if there's any truth to what was said there.
Are there particles flying around that can get breathed in and give ... | askscience | http://www.reddit.com/r/askscience/comments/gc7n9/how_accurate_is_this_post_on_the_japanese_nuclear/ | {
"a_id": [
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"text": [
"There's truth that there are radically different impacts from different types of radiation (alpha,beta,gamma) and where they're coming from, and what tissue is being irradiated, and so on. But he's talking about [Sieverts](_... | [] | [
"http://www.counterpunch.org/takashi03222011.html",
"http://www.reddit.com/r/todayilearned/comments/gbypx/til_chernobyl_is_closer_to_new_york_than/c1mghn1"
] | [
[
"http://en.wikipedia.org/wiki/Sievert",
"http://www.asahi.com/english/TKY201103250204.html"
],
[]
] | |
bge2yw | how exactly do trees get sick and how do plant related sicknesses spread? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bge2yw/eli5_how_exactly_do_trees_get_sick_and_how_do/ | {
"a_id": [
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"score": [
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"text": [
"There is various ways, via pathogens or insects such as earwigs,apheids, mealy bugs that eat the leaves and the bark, spreading from tree to tree. Dead rotten tissue spreads. \n They can spread if not contained. They are contained using a range... | [] | [] | [
[]
] | |
1r9y49 | why is over penetration from a bullet a bad thing? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1r9y49/eli5_why_is_over_penetration_from_a_bullet_a_bad/ | {
"a_id": [
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"score": [
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2,
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"text": [
"If a bullet goes into the target and comes out the other side, it is dangerous to anyone nearby. It might go straight through or ricochet in unpredictable ways. When dealing with firearms, you want the ... | [] | [] | [
[],
[],
[]
] | ||
18dsau | why is rope so strong? | Why not just have straight strands? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/18dsau/why_is_rope_so_strong/ | {
"a_id": [
"c8dvxh2"
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"score": [
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"text": [
"Imagine you have to try and lift a giant cube of iron by some handles on top. Likely, it'll be too heavy for one arm. However, use your other arm as well, and get a friend to help - it will be much easier, because you're splitting the weight amon... | [] | [] | [
[]
] | |
cjtt12 | Writing first dissertation: guidance on research and writing | Hi there,
Calling out to all of you wonderful, fascinating, historical beasts out there for assistance in writing my first historical dissertation., I am doing this outside of uni, and do not have access to that kind of material (pre application work)
Some quick questions:
How do you yourselves find historical sou... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cjtt12/writing_first_dissertation_guidance_on_research/ | {
"a_id": [
"evgh3yz"
],
"score": [
2
],
"text": [
"Read as much as you can. Don't come up with a question/focus until you've exhausted your reading. I used the bibliography of good overview books to get deeper reading. Local university libraries often let you in for free but don't let you borrow ... | [] | [] | [
[]
] | |
z4qzb | Would it ever be possible for the sky to be anything but blue? | I know the blue tone comes from blue light being scattered more easily than red light by the air. Would there ever be conditions that could turn our sky more toward the red end of the spectrum? | askscience | http://www.reddit.com/r/askscience/comments/z4qzb/would_it_ever_be_possible_for_the_sky_to_be/ | {
"a_id": [
"c61faof",
"c61fgze"
],
"score": [
2,
3
],
"text": [
"The colour of the sky can change if there's particulate matter blowing around.\n[Red Sky in Sydney](_URL_0_) but I suspect that's not what you wanted?",
"Yes. If the Sun was a red giant, our sky would be more red than it... | [] | [] | [
[
"http://www.smh.com.au/environment/weather/sydney-turns-red-dust-storm-blankets-city-20090923-g0so.html"
],
[]
] | |
24hsex | Is there a physiological (or maybe psychological) explanation for "Crazy Eyes"? | askscience | http://www.reddit.com/r/askscience/comments/24hsex/is_there_a_physiological_or_maybe_psychological/ | {
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"ch7h8m7",
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"text": [
"Damage to the amygdala produces deficits in the ability to recognize fear due to attentional neglect of other people's eyes. Interestingly, children with high psychopathic traits... | [] | [] | [
[
"http://brain.oxfordjournals.org/content/136/8/2550.full"
],
[
"http://www.jneurosci.org/content/32/45/15952.full"
],
[
"http://emotion.caltech.edu/dropbox/bi133/files/Whalen%20et%20al.pdf"
],
[]
] | ||
b3vem6 | How do germs/bacteria travel exactly? | If I drop food on the floor, there's no way I'm eating that food. However, if I place a plate of food on the floor, I'd still eat the food off that plate. Do germs and/or bacteria manifest only on whatever it comes in direct contact with, or will it spread around (in my example, around the plate and onto the food)? | askscience | https://www.reddit.com/r/askscience/comments/b3vem6/how_do_germsbacteria_travel_exactly/ | {
"a_id": [
"ej31acu",
"ej3velo"
],
"score": [
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3
],
"text": [
"It all depends, most pathogenic bacteria live in a water environment so they'd have to some kind of direct contact to that to spread. This is why the CDC always preaches to clean up raw chicken juice while cooking and to pr... | [] | [] | [
[],
[
"https://jb.asm.org/content/jb/180/5/1009/F1.medium.gif",
"http://www.vivo.colostate.edu/hbooks/pathphys/digestion/herbivores/bugs1.jpg",
"https://hypertextbook.com/facts/2001/JoyceWong.shtml",
"https://jb.asm.org/content/180/5/1009",
"http://cronodon.com/BioTech/Bacteria_motility3.html"... | |
2wsqc4 | Why do plants seem to be more likely than animals to survive with mutations that duplicate entire sets of chromosomes? | I was under the impression that while polyploidy-causing mutations are common for plants, such mutations usually cause animal embryos to miscarry before they can be carried to term. Is this true? If it is, then why? | askscience | http://www.reddit.com/r/askscience/comments/2wsqc4/why_do_plants_seem_to_be_more_likely_than_animals/ | {
"a_id": [
"coudj4u"
],
"score": [
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],
"text": [
"It is true that plants can generally tolerate polyploidy much more easily than animals. It is possible that animals are more prone to polyploidy than we had first expected, since the cytogenetics of large wild populations isn't something usually ... | [] | [] | [
[
"http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8312.2004.00332.x/full",
"http://www.ufv.br/dbv/pgfvg/BVE684/htms/pdfs_revisao/mutagenese_transposon/Polyploidy.pdf"
]
] | |
1on4h4 | How significant was the input of Subutai/Tsubodai to the success of both Genghis Khan's individual battles and long term campaigns? | As far as i know, Tsubodai was the main military strategist for Genghis Kahn. Did any of his strategies win battles that would have been lost without him? Was he actually that important to the overall conquering of other nations and would the Mongolian empire have been as powerful without him? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1on4h4/how_significant_was_the_input_of_subutaitsubodai/ | {
"a_id": [
"ccu1ylq",
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"text": [
"Genghis was a genius in the choosing of his Generals. It did not matter what their background may have been since Genghis practiced a system of Meritocracy anyone who proved their worth would be promoted. Subutai was one of ... | [] | [] | [
[
"humanities360.com"
],
[
"http://www.amazon.com/Great-Captains-Unveiled-Liddell-Hart/dp/030680686X",
"http://www.amazon.com/Strategy-Second-Revised-Edition-Meridian/dp/0452010713/ref=pd_sim_b_1/176-3940519-8665963",
"http://books.google.ca/books?id=tFQcwH2StsMC&pg=PA89&dq=At+Mohi+on+Ap... | |
1uasc2 | During World War II, how were American infantry weapons regarded by the other world powers? | Were American weapons typically held in high esteem? I am particularly interested in hearing the German opinion. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1uasc2/during_world_war_ii_how_were_american_infantry/ | {
"a_id": [
"cegftbq"
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"score": [
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"text": [
"If we're speaking about pure technical analysis it's hard to find primary sources and there is a lot of post-war speculation about various nations opinions on other nations equipment that I would not be too hasty to trust. The best lead would be... | [] | [] | [
[
"http://www.dererstezug.com/TacticalPhilosophies.htm",
"http://books.google.com.au/books/about/Kennbl%C3%A4tter_fremden_Ger%C3%A4ts.html?id=35We_Y2pgg0C&redir_esc=y"
]
] | |
3a40x5 | Was the American eugenics movement responsible for the holocaust? | I recently started reading Edwin Black's book "The War Against the Weak: Eugenics and America's campaign to create a Master Race" and what he seems to be asserting is that the American eugenics movement of the progressive era is what inspired the Nazis' ideals that eventually lead to the holocaust.
How true is this? I... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3a40x5/was_the_american_eugenics_movement_responsible/ | {
"a_id": [
"cs9jggw",
"cs9uuv8"
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"score": [
17,
2
],
"text": [
"This is a tricky sort of historical question. If the question is, can we trace a genealogy of ideas from the American eugenics movement to Nazi Germany, and from there to the Holocaust? — the answer is yes, we can. It is ac... | [] | [] | [
[],
[]
] | |
43yndx | WWI Austria-Hungary uniform question | I'm trying to get some info on the soldiers in [this picture] (_URL_0_). I'm pretty sure that they're Austro-Hungarian based on the uniforms, particularly the cloth field caps that some of them are wearing. I'm not 100% sure, but I've never seen that type issued elsewhere.
I don't know whether Austrian and Hungarian u... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/43yndx/wwi_austriahungary_uniform_question/ | {
"a_id": [
"cznf4sn"
],
"score": [
2
],
"text": [
"Short before WWI it was already clear to A-H, that the formerly used multi coloured uniforms are obsolote. Here is an [illustrated article](_URL_1_) (in Hungarian) with the new uniforms, that were used form 1908. The soldiers on your photo do loo... | [] | [
"https://i.imgur.com/VYT58QX.jpg"
] | [
[
"http://militiahungarorum.roncskutatas.hu/1867_k_a_c_f.html",
"http://nagyhaboru.blog.hu/2014/08/14/az_osztrak-magyar_hadsereg_egyenruhai_1914-ben"
]
] | |
mosk1 | why do so many politicians abuse their power ? | Hardly a week goes by without a report on some elected official abusing the system or taking kickbacks etc. What causes so many supposedly good people to turn bad ? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mosk1/why_do_so_many_politicians_abuse_their_power/ | {
"a_id": [
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"score": [
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3,
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2,
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"text": [
"You are assuming they are good in the first place. To reach that level of political succe... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | |
1t43a2 | what is the consumer price index, cost-of-living adjustment, and why is there debate about which is better to use? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1t43a2/eli5_what_is_the_consumer_price_index/ | {
"a_id": [
"ce444a4",
"ce44y4l"
],
"score": [
2,
2
],
"text": [
"I think you might've gotten confused somewhere along the line. The COLA (cost-of-living adjustment) is directly based on the CPI (consumer price index).",
"The Consumer Price Index is a calculation performed by the Feder... | [] | [] | [
[],
[
"http://www.bls.gov/cpi/cpifaq.htm"
]
] | ||
37m142 | What are good books about Propaganda Posters? | Dear people of /r/AskHistorians. I bought a book today about Chinese Propaganda Posters (Wolf, M (2011)*Chinese Propaganda Posters.* Cologne: Taschen). It is really amazing how all those cold-war Chinese Propaganda posters are bundled in one book. Now is my question: Are there books like this for other nations as well,... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37m142/what_are_good_books_about_propaganda_posters/ | {
"a_id": [
"crnu44f",
"crnydtz"
],
"score": [
2,
2
],
"text": [
"Can't recommend a book but I can recommend you ask over at /r/propagandaposters ",
"David King has produced a number of handsome hardcovers on Soviet imagery: *Red Star Over Russia* and *Russian Revolutionary Posters* s... | [] | [] | [
[],
[]
] | |
2q87jw | what's so hard about human cryo-tech? preserving a healthy human and then defrosting 100 years later alive? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2q87jw/eli5_whats_so_hard_about_human_cryotech/ | {
"a_id": [
"cn3r5gv",
"cn3r65k",
"cn3shd4",
"cn3xd8p"
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"score": [
31,
7,
4,
3
],
"text": [
"When water freezes, it forms tiny ice crystals. When those crystals form inside cells, they rip apart the cell membrane causing irreparable damage. ",
"When complex multi-cel... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Cryopreservation"
],
[]
] | ||
83m7ue | why does coughing tear up your throat when all you are doing is expelling air? | Sick and random thought occurred, thought I'd ask.
| explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/83m7ue/eli5_why_does_coughing_tear_up_your_throat_when/ | {
"a_id": [
"dvivqh9"
],
"score": [
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],
"text": [
"A cough is a vigorous expulsion of air to eject a foreign object or whatever is irritating you airways. To get that you are closing off your throat at the epiglottis, then building up some pressure behind it before opening the airway so the air... | [] | [] | [
[]
] | |
2ao0y1 | Looking for a book covering the end of the Third Reich | I am looking for a book that covers the end of the Third Reich. I am interested in the lead up to and conclusion of the Battle of Berlin, the subsequent German capitulation, Victory in Europe, Nuremburg Trials, and the fates of the various Nazi officials, heads of government, generals, etc.
Stories about the collapse... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ao0y1/looking_for_a_book_covering_the_end_of_the_third/ | {
"a_id": [
"cix1w4g",
"cix22or"
],
"score": [
3,
3
],
"text": [
"The first thing that comes to my mind is Ian Kershaw, The End: Hitler's Germany 1944-45. Kershaw is a good Historian, an even better writer and the topic may be exactly what you're looking for. Also, the eBook is $9.51 at _U... | [] | [] | [
[
"Amazon.com"
],
[]
] | |
1itfr7 | what's the difference between a tube amp, solid state amp, amphead, stack, etc? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1itfr7/eli5_whats_the_difference_between_a_tube_amp/ | {
"a_id": [
"cb7vfjo"
],
"score": [
2
],
"text": [
"A tube amp uses vacuum tubes in its amplifier stages. It supposedly has a warmer cleaner sound.\n\nSolid State amps use transistors or ICs for amplification.\n\nA hybrid amp uses both transistors and tubes. Most often a Hybrid amp uses tubes in t... | [] | [] | [
[]
] | ||
6czkgp | In the book 1421: The Year China Discovered America, it says they had colonies on Australian shores, how true is this? | When I search it up on google not a lot of information comes up. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6czkgp/in_the_book_1421_the_year_china_discovered/ | {
"a_id": [
"dhynjmg"
],
"score": [
6
],
"text": [
"The frequently asked questions wiki page on this subreddit has a [section dealing with Gavin Menzies and 1421](_URL_0_). As you'll notice if you read the posts linked to in that FAQ, historians do not have a high opinion of Menzies. Also, an exce... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/historians_views#wiki_historians.27_views_of_gavin_menzies.27_.221421.3A_the_year_china_discovered_the_world.22",
"https://mikedashhistory.com/2016/10/31/dreamtime-voyagers-australian-aborigines-in-early-modern-makassar/"
]
] | |
3zotja | why are vegans against dairy and eggs? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3zotja/eli5_why_are_vegans_against_dairy_and_eggs/ | {
"a_id": [
"cyntrk5"
],
"score": [
2
],
"text": [
"Yeah, it's generally because the cows and chickens and such that non-meat animal products come from are horribly mistreated. "
]
} | [] | [] | [
[]
] | ||
cco0wb | how is the scrotum able to react to temperature changes by tightening or loosening but when i’m in the shower with hot water running over them they still shrink if it’s cold. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cco0wb/eli5_how_is_the_scrotum_able_to_react_to/ | {
"a_id": [
"eto67d1",
"eto698e"
],
"score": [
8,
141
],
"text": [
"The temperature range for ideal sperm production is actually quite narrow. The [cremaster muscle](_URL_0_) is responsible for lowering (cooling) or raising (warming) the testicles in an attempt to maintain that ideal tempe... | [] | [] | [
[
"https://en.m.wikipedia.org/wiki/Cremaster_muscle"
],
[
"https://en.wikipedia.org/wiki/File:Gray1143.png"
]
] | ||
2k26zu | When was the first recorded battle that used black powder or gun powder as a weapon? Did both sides have it? How crucial was it to the battle? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2k26zu/when_was_the_first_recorded_battle_that_used/ | {
"a_id": [
"clhdrtg"
],
"score": [
45
],
"text": [
"I would say the siege of De'an in China in 1132 is the first recorded battle using black powder weapons. They employed what was called a 'Fire Lance' to shoot flames and shrapnel a few feet out from a bamboo tube attached to a spear.\n\nBlack po... | [] | [] | [
[]
] | ||
kewy4 | Observation in Quantum Mechanics? (How does the electron "know" it is being watched?) | I know that when you observe things on a quantum level the outcome can change, but I don't understand how or why. Is there a good explanation? Is there a good book on the subject for a general audience? | askscience | http://www.reddit.com/r/askscience/comments/kewy4/observation_in_quantum_mechanics_how_does_the/ | {
"a_id": [
"c2jpuj8",
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"c2js60z"
],
"score": [
9,
9,
6,
3,
9,
9,
6,
3
],
"text": [
"\"Observing\" is not the same as watching. In physics, the act of observation involves an in... | [] | [] | [
[],
[
"http://www.amazon.com/Conceptual-Foundations-Quantum-Mechanics-Advanced/dp/0738201049/ref=sr_1_11?ie=UTF8&qid=1315968277&sr=8-11"
],
[],
[],
[],
[
"http://www.amazon.com/Conceptual-Foundations-Quantum-Mechanics-Advanced/dp/0738201049/ref=sr_1_11?ie=UTF8&qid=1315968277&sr=8... | |
2ratwq | Did an uneven distribution of wealth play a roll in the fall of the Roman empire? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ratwq/did_an_uneven_distribution_of_wealth_play_a_roll/ | {
"a_id": [
"cnebhaf"
],
"score": [
13
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"text": [
"The reasoning behind this argument, for those who are unaware, is that the decline of freeholding citizen-soldier-farmers from the days of the Republic led to a decline in the Roman democracy, and eventually, to the Empire as 'barbarians' took o... | [] | [] | [
[]
] | ||
eh52v1 | before language was invented was an internal dialogue possible for humans? how would it have worked? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eh52v1/eli5_before_language_was_invented_was_an_internal/ | {
"a_id": [
"fcegxk3",
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"fcej1sj",
"fcemgq3"
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2,
6,
2,
26,
3
],
"text": [
"That's an interesting question, and I doubt anyone can tell you since you'd need to experience it to know for sure, but I can tell you that this morning whil... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
a3pelg | what is abductive reasoning? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a3pelg/eli5_what_is_abductive_reasoning/ | {
"a_id": [
"eb7zw58",
"eb803le"
],
"score": [
3,
2
],
"text": [
"It is trying to figure out the best explanation for something without needing to prove it. Sort of trying to figure out the cause due to the effect.\n\nIt's not great for proving something is true, but can be helpful for fin... | [] | [] | [
[],
[]
] | ||
8sb34p | Why can’t we harness the Casimir effect as an energy source? | [Sixty Symbols- Casimir Effect and Black Holes](_URL_0_)
From what I understand it would not ever produce too much energy even if harnessed. Let me be clear I am a chemistry undergrad senior with only basic knowledge of physics, so please excuse my naïvety; but would it be possible to use plates with some sort of piezo... | askscience | https://www.reddit.com/r/askscience/comments/8sb34p/why_cant_we_harness_the_casimir_effect_as_an/ | {
"a_id": [
"e0yyg08",
"e0z3ddl"
],
"score": [
19,
13
],
"text": [
"It is just like any other potential energy. You can extract energy by moving conductors closer together. And then? If you want to repeat that you have to move them apart again, putting that energy back in.",
"It’s pret... | [] | [
"https://youtu.be/IRcmqZkGOK4"
] | [
[],
[]
] | |
aztebp | why do the tv shows produced by local stations on a budget look so terrible, while those produced by hbo/netflix/etc look so good? how exactly does the extra budget money make them look so much better? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aztebp/eli5_why_do_the_tv_shows_produced_by_local/ | {
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"It funds better lighting, and cinematography instead of just video recording. Using much more expensive cameras and knowing what you are doing produces vastly better results than... | [] | [] | [
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bv3cgv | How common were dinosaurs? | It sounds dumb but hear me out. In movies, we always see dinosaurs in a mass quantity, squished together and nearly on top of each other. But if we were to go back right now, how often would you see dinosaurs? What would be the density of dinosaur life? What modern day animal sightings could you compare dinosaurs with?... | askscience | https://www.reddit.com/r/askscience/comments/bv3cgv/how_common_were_dinosaurs/ | {
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"Dinosaur were weird. Their maturity curve was very different from mammals and more like fish. Mammals, especially large ones, usuall... | [] | [] | [
[],
[
"https://www.factmonster.com/dk/encyclopedia/science/era-dinosaurs",
"https://ucmp.berkeley.edu/mesozoic/triassic/triassictect.html",
"https://www.livescience.com/43295-triassic-period.html",
"https://cosmosmagazine.com/palaeontology/big-five-extinctions"
],
[],
[],
[],
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1hdv84 | Did people from the Medieval time period consider themselves living in "Medieval" times, or was it something titled by modern historians? | Did people from the Medieval time period consider themselves to be in the Medieval time period?
Or did modern historians create that word to describe that time period? If so, why/how/when did they choose that word?
Similar questions for people living in "The Dark Ages." | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1hdv84/did_people_from_the_medieval_time_period_consider/ | {
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"Reference to the Middle Ages first enters Latin in 1469, and the tripartite periodization with which we're familiar today became the standard way of thinking in the seventeenth century thanks to Christoph Cellarius, although... | [] | [] | [
[],
[]
] | |
2sp3w6 | how does the curiosity rover take pictures of itself? | When looking at pictures like [this](_URL_0_) it appears there is nothing attached to the rover itself that is taking the picture. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2sp3w6/eli5how_does_the_curiosity_rover_take_pictures_of/ | {
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"I won't be able to explain any better, so have a look here: _URL_0_",
"I'm trying to post you this link but the stupid automoderator of this sub has removed my post so here I am writing a lengthy se... | [] | [
"http://i.imgur.com/2aWKxtd.jpg"
] | [
[
"http://www.nasa.gov/mission_pages/msl/multimedia/pia16457.html#.VLnNJHXcdhE"
],
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"http://news.nationalgeographic.com/news/2012/121204-curiosity-mars-rover-portrait-science-space/"
],
[
"http://en.wikipedia.org/wiki/Selfie_stick"
]
] | |
u05hb | What was the most advanced society relative to the rest of the world? | Probably been asked before, and more probably a simplistic take: the Egyptians were architects extraordinaire, the Chinese had super weaponry hundreds of years before the rest of us, and Greeks as well as Muslims and Hindus (not sure what to call the respective cultures) were mathematically ahead of everyone.
What c... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/u05hb/what_was_the_most_advanced_society_relative_to/ | {
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"text": [
"What time period are you talking about? The most technologically advanced societies would be today's societies. 3000 BCE- 600 BCE- 0 CE- 600 CE- 1450 CE- 1750 CE- 1914 CE- Present have a lot of power shifts and history going... | [] | [] | [
[],
[]
] | |
3r6zvb | the speaker of the house is not nonpartisan? | I've noticed that the new Speaker of the United States congress (Paul Ryan) listed repealing Obama care as one of his top priorities, which seems incredibly partisan to me. In Canada (where I live) the speaker of the house (federally) and of the legislatures (provincially) are usually nonpartisan and don't push specifi... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3r6zvb/eli5_the_speaker_of_the_house_is_not_nonpartisan/ | {
"a_id": [
"cwlggi4",
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"score": [
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"text": [
"The Speaker, in the U.S., is usually a major figure in the majority party and is usually partisan (at least recently). In fact, Boehner's relative willingness to compromise was a big part of why he had so much trouble gettin... | [] | [] | [
[],
[]
] | |
32s6g4 | inflammation and atherosclerosis | Contemporary medical research is focusing a lot on diet-induced inflammation, and how this may be the leading cause in ailments such as atherosclerosis.
What I have not understood, is the mechanism behind this inflammation? How do the arteries get inflamed? A chemical 'irritates' the cell walls? If so, how? If not... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32s6g4/eli5_inflammation_and_atherosclerosis/ | {
"a_id": [
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"text": [
"The basics of this are that inflammation occurs when cells are damaged, the source of damage doesn't matter but when a cell IS damaged they release chemicals that cause inflammation.\nAtherosclerosis is also a process based in cell damage. Your b... | [] | [] | [
[]
] | |
3z6alj | possible solutions to xeno's paradox | Could anyone ELI5 the possible solutions to Xeno's Paradox? In case you may be unfamiliar with it, it is a series of paradoxes developed by the ancient Greeks. Essentially, it is states that moving from point 'A' to point 'B' is physically impossible because you must pass through an infinite series of midpoints.
Fo... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3z6alj/eli5_possible_solutions_to_xenos_paradox/ | {
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"The solution is that at the same time you're halving distance, you're also halving time. So while you have an infinite number of steps, most of them take an infinitesimal amount of time.\n\nYou could state Xeno's Paradox th... | [] | [] | [
[],
[]
] | |
6ud970 | Aliens, Bigfoot, and Ghosts? What's the history of "the paranormal" in Western thought? | I heard about John Murray Spear and his attempt to build a "New Motive Power", so I was curious, what is the history of what we would roughly call "the paranormal" (by which I mean things like aliens, UFOs, ghosts, cryptozoology, ancient aliens, ESP, etc.) in Western thought?
When did they become the paranormal for t... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6ud970/aliens_bigfoot_and_ghosts_whats_the_history_of/ | {
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"dlsmjqx"
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"score": [
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"text": [
"An interesting case study would be the Loch Ness Monster; a creature attested as far back as St Columba's early medieval hagiography before its resurgence in the mid 20th century. As we'll see, shifting cultural and scientific paradigms complet... | [] | [] | [
[]
] | |
2h3hpc | Did Hitler have anything to say about 'Mein Kampf' and its contents after he finally rose to power? Did he ever make any attempt to revise, expand or alter it? | And did he ever try to write another book? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2h3hpc/did_hitler_have_anything_to_say_about_mein_kampf/ | {
"a_id": [
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"text": [
"Hitler did actually try and write another book. Its been called Zweites Buch or \"Second Book\", where as Mein Kampf focused on Hitler's early life and struggles as well as setting the tone for Nazi racial politics, the Se... | [] | [] | [
[],
[]
] | |
59is37 | how does shampoo and body wash work so effectively when it only stays on our body for a few seconds before getting washed off? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/59is37/eli5_how_does_shampoo_and_body_wash_work_so/ | {
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"If I understood correctly, you are basically asking how soap works. \n\nSoap/shampoo/bo... | [] | [] | [
[],
[
"https://www.youtube.com/watch?v=w4tkp6ieldw"
],
[],
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8k810h | are there any benefits to regressive taxation? has it ever been used? | Hey! I'm currently taking econ in high school and have been reading into the different forms of taxation. I find regressive taxation to be quite fascinating because of it's inherent awfulness (tax more to the poor, less to the rich). When doing research online I haven't found a single example of a country actually usin... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8k810h/eli5_are_there_any_benefits_to_regressive/ | {
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"text": [
"There are many forms of regressive taxes in common use. Sales taxes, for example, are regressive, which is why food is often exempt from them.",
"Not much... | [] | [] | [
[],
[],
[],
[],
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] | |
1btkn4 | the challenger (space shuttle) crash. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1btkn4/eli5_the_challenger_space_shuttle_crash/ | {
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"text": [
"The Challenger disaster was technically a structural failure leading to an explosion. It was caused by a design flaw in the solid rocket boosters (SRB's) which are the two big white rockets stuck to the outside of the big orange tank (look at a p... | [] | [] | [
[]
] | ||
pyqd3 | how is it that an equation is able to describe the nature of reality? | While I was watching a video it said, "Einstein's equation suggested the universe was either expanding or condensing." How can abstract numbers define something like the nature of the universe? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/pyqd3/eli5_how_is_it_that_an_equation_is_able_to/ | {
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"score": [
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"text": [
"Equations aren't about numbers. You put numbers into them and get numbers out of them, but that's not the point. The point of equations is to express *concepts*, by describing how ... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Fibonacci_numbers#In_nature"
],
[]
] | |
5fpk23 | Is mild psoriasis associated with a shorter life expectancy? | While looking for information on psoriasis, I came across two studies that seem to completely contradict each other. In [this study](_URL_1_), mild psoriasis is not associated with an increased risk of death. However, in [this study](_URL_0_), people diagnosed with even mild psoriasis before the age of 25 die, on avera... | askscience | https://www.reddit.com/r/askscience/comments/5fpk23/is_mild_psoriasis_associated_with_a_shorter_life/ | {
"a_id": [
"danxl7e",
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"score": [
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2
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"text": [
"For Gulliver et. al, it looks like they focused on hospitalized patients. For Gelfand et. al, they mention that they found that patients treated as outpatients fair better. Perhaps the patients who were hospitalized had othe... | [] | [
"https://www.ncbi.nlm.nih.gov/pubmed/21291654",
"https://www.ncbi.nlm.nih.gov/pubmed/18086997"
] | [
[],
[]
] | |
2zu53h | why do you see more in the camera app, depending on the orientation of your phone? | My friends were freaking out about this today. Why when you rotate your phone while taking a picture, doe do you see more depending on your phone's orientation?
Like, in portrait you see more up & down, and in landscape you see more left to right. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2zu53h/eli5_why_do_you_see_more_in_the_camera_app/ | {
"a_id": [
"cpmaf8q",
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"score": [
5,
2
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"text": [
"Your scene is a rectangle not s square so the camera is cropped to fit the display. ",
"A smartphone's camera is 4:3 in landscape, so when you take a portrait shot it's 3:4. Almost all camera sensors are rectangular, DSL... | [] | [] | [
[],
[]
] | |
42cugu | does alcohol increase or decrease dopamine levels | I know at first alcohol raises dopamine levels but what about in the long run? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/42cugu/eli5does_alcohol_increase_or_decrease_dopamine/ | {
"a_id": [
"cz9bxje"
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"score": [
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"text": [
"[Read this](_URL_0_)\n\nI am the walking hedonic dysregulation theory"
]
} | [] | [] | [
[
"http://www.hamsnetwork.org/dopamine.pdf"
]
] | |
2r1nch | why are republicans against giving the lgbt community equality? | I read an article about Democrats wanting to introduce a bill in Congress that would ban discrimination and the like targeted at the LGBT community. For what reasons would conservatives not be in support of this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2r1nch/eli5_why_are_republicans_against_giving_the_lgbt/ | {
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"text": [
"IMO, it's got not much to do with human's rights then it has to do with the religious wing. \n\nIf I'm not mistaken, many of the active conservative communities oppose to the LGBT... | [] | [] | [
[],
[],
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21m9rd | How do cats see in the dark? | And specifically, how were they able to evolve that way when humans could not? In the second episode of the new Cosmos series with Neil DeGrasse Tyson, he spends time talking about how the eyeball was originally evolved in an underwater environment by a common ancestor of ALL living creatures today, including humans, a... | askscience | http://www.reddit.com/r/askscience/comments/21m9rd/how_do_cats_see_in_the_dark/ | {
"a_id": [
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"score": [
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"text": [
"Great question! Firstly, a quick description of vision (the how): \n\nSpecialized neurons called photoreceptors are what pick up light and convert it into signals that the brain can interpret. The two major types of photoreceptor cells are rods a... | [] | [] | [
[]
] | |
35j39o | why do people use itunes even though there are may other ways to download music. | ^ | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/35j39o/eli5_why_do_people_use_itunes_even_though_there/ | {
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"text": [
"I believe you have to use iTunes to download to apple devices, and if you want to legally purchase music why not use iTunes as opposed to any other format",
"The Itunes store ... | [] | [] | [
[],
[],
[],
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] | |
120tsa | Are the Voyager probes still taking pictures? | I know the Voyager probes are sending data, but are there any pictures of the possible heliosphere or the other outer reaches of the solar system contained in that data? | askscience | http://www.reddit.com/r/askscience/comments/120tsa/are_the_voyager_probes_still_taking_pictures/ | {
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"text": [
"The cameras on the voyager probes have been disabled to save power.",
"In the [wikipedia article](_URL_1_) in the \"Scientific instruments\" yoi can see t... | [] | [] | [
[],
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"http://www.dailymail.co.uk/sciencetech/article-2196997/Voyager-1-beams-images-Earth-tiny-dot-prepares-interstellar-space.html",
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[
"http://voyager.jpl.nasa.gov/science/thirty.html"
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[],
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4u6i7z | does ice go bad? if i found some ice cubes that had been sitting in a freezer since 1945, could i eat them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4u6i7z/eli5_does_ice_go_bad_if_i_found_some_ice_cubes/ | {
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"text": [
"If the ice was made from good water in the first place it is probably good. Glacier ice is sold as a novelty. It is thousands of years old.\n\nIce made from contaminated water is not good and probably stays contaminated for ... | [] | [] | [
[],
[]
] | ||
1jw5mt | 3d movies | As the title states. I'm wondering how 3D movies work, and how they actually become 3D. Thanks (: | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jw5mt/eli5_3d_movies/ | {
"a_id": [
"cbiv55u"
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3
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"text": [
"To keep it simple. You can produce 3D in your vision every day because you have two eyes.\n\n3D movies are filmed with two camera lenses, side by side, similar to your eyes. \n\nWhen shown on your TV/movie theatre, the special glasses you wear ma... | [] | [] | [
[]
] | |
sqi7j | Can r/askscience please tear this apart? I don't want it to be true. | askscience | http://www.reddit.com/r/askscience/comments/sqi7j/can_raskscience_please_tear_this_apart_i_dont/ | {
"a_id": [
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"score": [
2,
2
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"text": [
"Same thing was posted a few days ago. It was bollocks then and it's bollocks now. A specialised nuclear warhead or 50 couldn't wipe out 3 billion people, let alone a piddly power station fuel rod.",
"I tend to not trust ... | [] | [] | [
[],
[]
] | ||
3otc00 | how did america's economy overtake britain in the late 1800s? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3otc00/eli5_how_did_americas_economy_overtake_britain_in/ | {
"a_id": [
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"score": [
3
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"text": [
"America had a ton of natural resources, long period of peace to develop, rapid increase in production due to industrialization, and rapid increase in work force due to immigration. Factor this in with increasing education and the growth of cities... | [] | [] | [
[]
] | ||
5t2ufm | What does the Schrodinger equation mean and what does it tell us? | I am beginning quantum mechanics and we have been studying the Schrodinger equation pretty extensively. But I am confused about what this equation represents and why can't we derive it? | askscience | https://www.reddit.com/r/askscience/comments/5t2ufm/what_does_the_schrodinger_equation_mean_and_what/ | {
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"score": [
16,
2,
2,
3
],
"text": [
"The time-dependent Schrodinger equation tells you how a quantum state vector evolves with time. It says that the Hamiltonian operator is the generator of translations in time. If ... | [] | [] | [
[],
[],
[],
[]
] | |
1u40tg | why does the hair of humans get oily after a day or 2 without bathing, but a cat's hair always feels so soft after not being for 11 months or more? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1u40tg/eli5_why_does_the_hair_of_humans_get_oily_after_a/ | {
"a_id": [
"ceeamxa"
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"score": [
9
],
"text": [
"Your body overproduces skin oil because you wash it away every day. If you go a month or so without using soap or shampoo, your body will eventually reach an equilibrium, and it'll be a lot less oily and gross than you think.\n\nCats also spend ... | [] | [] | [
[]
] | ||
z0lsd | How physically fit were soldiers of antiquity? What was their training like? For that matter, how fit were average people? | Spartacus and 300 have deluded my perceptions. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/z0lsd/how_physically_fit_were_soldiers_of_antiquity/ | {
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92,
9
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"text": [
"You could always go to the source itself. Ad fontes.\n\nThis is *De Re Militari*, an elementary military training manual from the late Roman Empire. Check out the recommendations for the skills that... | [] | [] | [
[
"http://www.pvv.ntnu.no/~madsb/home/war/vegetius/",
"http://www.pvv.ntnu.no/~madsb/home/war/vegetius/dere03.php#03"
],
[],
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] | |
4jwmwz | why does red on a blue background or vice versa hurt our eyes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4jwmwz/eli5_why_does_red_on_a_blue_background_or_vice/ | {
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4
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"text": [
"it hurts ours eyes? ",
"Certain high contrasting colors are difficult to focus on. It doesn't physically hurt our eyes, it's your eyes straining themselves to actually focus.\n\nOne that always get... | [] | [] | [
[],
[],
[]
] | ||
2wnuc4 | Black History Month AMA Panel | February is Black History Month in the United States, created in 1976 to recognize the important, and far too often ignored, role that African-Americans have played in the country since its colonial beginnings. In recognition of this celebration, we've assembled a fantastic panel for you today of experts in the field, ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2wnuc4/black_history_month_ama_panel/ | {
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"cosovm1",
"cospdxa",
"cospm3x",
"c... | [] | [] | [
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6qgoc9 | Why African rain forests are located on the western side and not all the way to Ethiopia and Somali? | What's the reason for Ethiopia being so arid? Shouldn't it get moisture from the Indian Ocean by the means of trade winds? | askscience | https://www.reddit.com/r/askscience/comments/6qgoc9/why_african_rain_forests_are_located_on_the/ | {
"a_id": [
"dky2ts8"
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"score": [
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"text": [
"My book shows the wet band going most of the way across the continent, to the headwaters of the Nile, but there is a dry spot on the far east, apparently with winds from the north east (Saudi Arabia) or SouthWest (Africa). Either way, they appa... | [] | [] | [
[]
] | |
rglu4 | Is there any way to make oneself dream less often? | askscience | http://www.reddit.com/r/askscience/comments/rglu4/is_there_any_way_to_make_oneself_dream_less_often/ | {
"a_id": [
"c45ng33",
"c45nhy9",
"c45njfb"
],
"score": [
2,
3,
3
],
"text": [
"If you feel like you're dreaming too much, there is a good chance you aren't going into the deeper sleep cycles and there are factors preventing you from reaching deeper sleeping states. Generally eithe... | [] | [] | [
[],
[],
[]
] | ||
31cc0e | why do autistic children frequently show extraordinary intellectual prowess? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/31cc0e/eli5_why_do_autistic_children_frequently_show/ | {
"a_id": [
"cq09jk3",
"cq09su3"
],
"score": [
4,
7
],
"text": [
"It's not all that frequent, it's just a persistent myth that autism is like \"Rain Man\". Probably because it makes us feel better about the situation.\n\nYou've got a relatively small number of people with low-level autist... | [] | [] | [
[
"https://www.youtube.com/watch?v=w_23z9yJAq0&ab_channel=DiscoveryLife"
],
[]
] | ||
3zo1zk | why were flat roofs used so much in buildings in the past? did they not know the leaking problem it would eventually lead to? | I work in an old building that has a flat roof. It leaks every time we get a heavy rain. My boss has done almost everything and it eventually ends up leaking again. The school I went to had a flat roof and it leaked. Were they cheaper? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3zo1zk/eli5why_were_flat_roofs_used_so_much_in_buildings/ | {
"a_id": [
"cynof79",
"cynseys",
"cynvimj",
"cynw0bx"
],
"score": [
5,
2,
3,
2
],
"text": [
"Flat roofs are much cheaper to build than pitched roofs. They require less material and significantly less time. This is especially true when they are spanning a large open area li... | [] | [] | [
[],
[],
[],
[]
] | |
29ragi | why do grocery stores have paper bags for mushrooms and plastic bags for everything else? | Why do grocery stores have paper bags for mushrooms and plastic bags for everything else? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29ragi/eli5_why_do_grocery_stores_have_paper_bags_for/ | {
"a_id": [
"cinpv6x"
],
"score": [
2
],
"text": [
"Moisture. Moisture ruins mushrooms. Plastic bags hold the moisture in, while paper bags will absorb the moisture and keep the mushrooms looking fresh. "
]
} | [] | [] | [
[]
] | |
rj8js | why doesn't reddit load image links in new tabs practically. | When i open a reddit link in a new tab, why does it open like this:
_URL_0_
instead of like this;
_URL_1_
possibly with some upvote and downvote buttons added in and a link to the original content in the toolbar that appears at the top. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/rj8js/why_doesnt_reddit_load_image_links_in_new_tabs/ | {
"a_id": [
"c4697i5",
"c469wwz",
"c46a9s2"
],
"score": [
2,
2,
2
],
"text": [
"download reddit enhancement suite and you can set it to open images in a new tab",
"I believe most of reddit's users are not signed in. Opening a toolbar for every user would be impractical, becaus... | [] | [
"http://i.imgur.com/b90ZE.jpg",
"http://www.reddit.com/tb/iwkkx/"
] | [
[],
[],
[]
] | |
3610xe | how does the "communication" of evolution happen? | This mosquito had been buzzing around my ear for a few minutes. I acquired my target and brought him down.
My next thought:
"hmmm that's gunna suck when mosquitoes learn how to evade our hands."
The thing is, the mosquito is dead. He can't communicate any more, however evolution still happens. While mosquitoes migh... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3610xe/eli5_how_does_the_communication_of_evolution/ | {
"a_id": [
"cr9pxw1",
"cr9pz43"
],
"score": [
7,
2
],
"text": [
"He dosent communicate. What happens is that you removed him from the gene pool, he can no longer reproduce. But all the mosquitos who didn't get hit can reproduce, so they can pass on whatever trait they have that allowed th... | [] | [
"http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0012166"
] | [
[],
[]
] | |
2y3jn4 | Why do some historians regard the battle of seven pines as the most important battle of the civil war? | Why do some historians regard the battle of seven pines as the most important battle of the civil war?
All answers apreciated | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2y3jn4/why_do_some_historians_regard_the_battle_of_seven/ | {
"a_id": [
"cp62lgb"
],
"score": [
2
],
"text": [
"The only one i've seen is that it places Robert E Lee in control of the Army of Northern Virginia since Johnson got injured during the battle. Why is Lee gaining control of the army of northern virginia important? Because he's Robert E Lee and th... | [] | [] | [
[]
] | |
3fgiuy | Wait, so were the Contras funded with Cocaine or Iranian arms sales? | I'm writing an essay on the Iran-Contra scandal, I've seen Kill The Messenger which deals with the CIA cocaine smuggling. But I've also been researching the Iranian weapons deals in exchange for hostages, which resulted income for the Contras as well. Was the U.S taking part in both? Can someone just lay it all out fla... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3fgiuy/wait_so_were_the_contras_funded_with_cocaine_or/ | {
"a_id": [
"ctohfb9"
],
"score": [
62
],
"text": [
"Yes, the US was taking part in both. \n\nThe Congress had cut off funding for the Contra war. The CIA and others, in the executive branch, were deeply committed to the war, but they now had no funding.\n\nThe US, as a part of the hostage releas... | [] | [] | [
[
"https://www.brown.edu/Research/Understanding_the_Iran_Contra_Affair/thehearings.php"
]
] | |
6g5exu | what is the point of making medical students study all the subjects/all residential rotations? | If, for example, you know you want to be a psychiatrist, what's the point of having to go through the physical science rotations? Isn't that a waste of resources? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6g5exu/eli5_what_is_the_point_of_making_medical_students/ | {
"a_id": [
"dinn14e",
"dinsnso",
"dinwxhm"
],
"score": [
5,
5,
2
],
"text": [
"Humans are one giant interconnected network of neural, chemical, and structural oddities. To understand the brain, you have to understand the body, and vice versa. It isn't a waste of time *at all*, and... | [] | [] | [
[],
[],
[]
] |
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