q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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218287 | How does a Cameleon change color base on its environment? | My question isn't much about Cameleon's skin chemical interaction. It's more about visualization and/or sensing environment: I saw a video where they were placing glasses with different frame colors beneath a cameleon and the cameleon was immediately changing colors base on the colors. What was surprising to me, the ca... | askscience | http://www.reddit.com/r/askscience/comments/218287/how_does_a_cameleon_change_color_base_on_its/ | {
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"For reference, this seems to be the video in question. Looks to be a viral commercial.\n\n_URL_0_",
"So the video you are talking about is fake. Chameleo... | [] | [] | [
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"https://www.youtube.com/watch?v=Vs1RlkXTT08"
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"https://www.youtube.com/watch?v=UR_byRbXxvs"
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1g56xz | When a thyroid disorder is suspected, are the TSH and T4 blood tests sufficient to confidently confirm or disprove the diagnosis? | askscience | http://www.reddit.com/r/askscience/comments/1g56xz/when_a_thyroid_disorder_is_suspected_are_the_tsh/ | {
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"text": [
"In addition, one could use:\n\n1. [Thyroid ultrasound](_URL_2_): ?cystic/nodular, size of cysts/nodules, no information on function of nodule (?toxic/non-toxic)\n2. [Nuclear thyroid uptake scan](_URL_1_) using technetium pertechnetate: function o... | [] | [] | [
[
"http://www.scielo.br/img/revistas/clin/v62n4/a07fig02.jpg",
"http://radiopaedia.org/cases/graves-disease-thyroid-scintigraphy-1",
"http://radiopaedia.org/cases/benign-thyroid-lesion-on-ultrasound"
]
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36l3ex | why are there fake/bad ads on sites like "putlocker" and other various sketchier websites. | First time poster here. Where do these crappy ads come from, who is posting them, how, and why? I'm talking about "find local singles in your area" type ads or obviously false clickbait ads that clearly lead to some sort of virus. Do people actually click on them? Is this what is funding websites like "putlocker"? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/36l3ex/eli5_why_are_there_fakebad_ads_on_sites_like/ | {
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"Imagine that out of the people who visit websites with those ads, 50% of them see the ads. Now imagine out of those who see them, 1% click on them by accident and 0.5% click on them on purpose (e.g. they are computer illiterate, don't realize wha... | [] | [] | [
[]
] | |
9y5em4 | how can the voyager and other craft go to such extreme distance? how does it have enough fuel? why can't we send humans like that instead? | I'm curious about these pictures that I see all the time. Voyager or some other spacecraft sends pictures of distant planets, being some light years away. Even pictures of Earth looking like a speck of dust. How did it travel so far? How is this possible?
For humans, I understand it would take tons of more specialized... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9y5em4/eli5_how_can_the_voyager_and_other_craft_go_to/ | {
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5beq0k | why does sound need a medium to travel through and exist upon? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5beq0k/eli5_why_does_sound_need_a_medium_to_travel/ | {
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"Sound is just vibrations traveling through a medium, like air or water. If there's no medium, there's nothing that can vibrate, and thus no sound.",
"Sound is movement of particles. If there is no p... | [] | [] | [
[],
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6leh49 | how are nuts so high in calories, yet so healthy and good for weight loss? | I'm on a diet and bought a 2 3/4 oz bag of mixed nuts and it's 470 calories (380 from fat). This kinda goes against everything I've learned about calories and weight loss. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6leh49/eli5_how_are_nuts_so_high_in_calories_yet_so/ | {
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"text": [
"I do not know what you have learned about calories and weight loss, but what matters with them is total input in a day being less that output for you to los... | [] | [] | [
[],
[],
[],
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] | |
yztde | Could you completely sound proof a room from sounds outside of it by creating a thin vacuum layer around the room? | Let's say you live in a glass dome (similar to Sandy's dome in Sponebob Squarepants, but above the water). Instead of one solid piece of glass that makes up your dome, there are two glass domes, one encasing the other, with a 1 inch layer of air in between. If you were able to create a vacuum in this 1 inch layer betwe... | askscience | http://www.reddit.com/r/askscience/comments/yztde/could_you_completely_sound_proof_a_room_from/ | {
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"text": [
"In principle yes, but how would you keep the two domes from touching? ",
"it's a good sound insulation, but the part of the closure that is not under vacuum (the foundation of ... | [] | [] | [
[],
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[],
[]
] | |
19kzvn | If a nipple is removed, by any means, does it grow back as a nipple or just regular skin? | askscience | http://www.reddit.com/r/askscience/comments/19kzvn/if_a_nipple_is_removed_by_any_means_does_it_grow/ | {
"a_id": [
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"text": [
"The nipple-areolar complex cannot grow back - after [mastectomies in which the NAC is not spared](_URL_1_), surgeons will often create an artificial nipple and then [tattoo in a surrounding areola](_URL_0_) for cosmesis. "
]
} | [] | [] | [
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"http://www.diepflap.it/dati/pag/19/img/104.jpg",
"http://www.plasticsurgerycenterofthepalmbeaches.com/wp-content/uploads/2011/06/before_after_2vive.jpg"
]
] | ||
3v6wva | why isn't australia cold and snowy like north america and europe? | Its closer to the south pole than the equator | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3v6wva/eli5_why_isnt_australia_cold_and_snowy_like_north/ | {
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"Victoria (south-eastern Australia) is [only about as far south of the equator as Spain or Virginia are north of it](_URL_0_)",
"No, it's not closer to the South Pole to the Equator. Whoever told you... | [] | [] | [
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"http://www.mapsofindia.com/worldmap/world-map-with-latitude-and-longitude.jpg"
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"https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Antipodes_equirectangular.svg/2000px-Antipodes_equirectangular.svg.png"
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kqva4 | Why does my Hand Sanitizer expire? | I just noticed today that my hand sanitizer expires. It isn't for quite some time (July 2013) but I can't seem to understand why it would.
Is it purely "political"? As in, they make up and expiration date so that consumers will be sure to buy more when that day comes around or is it a chemical issue, as in the ingredi... | askscience | http://www.reddit.com/r/askscience/comments/kqva4/why_does_my_hand_sanitizer_expire/ | {
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"[According to this link](_URL_0_) it expires because some of the alcohol evaporates. However this doesn't make the hand sanitizer un... | [] | [] | [
[
"http://www.leonardchu.com/blog/index.php/2010/hand-sanitizer-doesnt-expire-so-why-do-they-have-expiration-dates/"
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"http://www.reddit.com/r/askscience/comments/kqva4/why_does_my_hand_sanitizer_expire/c2mh0m5"
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"http://www.leonardchu.com/blog/index.php/2010/hand-sanitizer-doesnt-... | |
1bx8ww | Monday Mish-Mash | History on Television | Previously:
- [Apologies and Questions](_URL_1_)
- [Poetry and History](_URL_5_)
- [Oratory](_URL_0_)
- [Military Strategy](_URL_7_)
- [Memorials, Statues and Monuments](_URL_6_)
- [Games and History](_URL_4_)
- [Sex and Scandal](_URL_2_)
- [Siege Warfare](_URL_3_)
Today:
First, pursuant to some of the suggestions ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1bx8ww/monday_mishmash_history_on_television/ | {
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"text": [
"Oh, so Matthew Sutton, who penned a marvelous book on Aimee Semple McPherson, played an acti... | [] | [
"http://www.reddit.com/r/AskHistorians/comments/1a36wu/monday_mishmash_oratory/",
"http://www.reddit.com/r/AskHistorians/comments/1azt32/monday_mishmash_apologies_from_me_and_questions/",
"http://www.reddit.com/r/AskHistorians/comments/17fpl8/monday_mishmash_sex_and_scandal/",
"http://www.reddit.com/r/AskHist... | [
[],
[],
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23i7od | How does our brain turn the sound waves it hears into a something understandable and something we can take information from? | it always amazes me and i wonder what the science behind it is? | askscience | http://www.reddit.com/r/askscience/comments/23i7od/how_does_our_brain_turn_the_sound_waves_it_hears/ | {
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"text": [
"Sound waves enter into your ear and those vibrations come into contact with your eardrum. They travel through the three ossicles and then into the inner ear. One of the three ossicles, the stapes, makes contact with the oval... | [] | [] | [
[],
[]
] | |
ch5tzd | how do those heart rate monitors on phones that don't have built in sensors work by using only flash and the camera? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ch5tzd/eli5how_do_those_heart_rate_monitors_on_phones/ | {
"a_id": [
"eupomzv",
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3
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"text": [
"The flash lights up your finger, the camera detects any changes to how brightly lit your finger is. During a beat there’s a little more blood in the vessels of the finger, so it blocks a little more light. The camera can se... | [] | [] | [
[],
[]
] | ||
2f5jtx | Copper jewelry | I was in a conversation with a friend the other day and the subject of copper jewelry came up. He said that it was not used historically- this smelled wrong to me, but I lacked the knowledge to be sure. Looking online I am seeing some central Americans used it and Egyptians... But this seems incomplete.
Anyone able... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2f5jtx/copper_jewelry/ | {
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"text": [
"Copper jewelry exists as far back as the Badarian Period in Egypt (pre-Dynastic circa 4400BC). Copper jewelry is found all over the ANE going as far back as the Chalcolithic period (c 6000BC). Copper jewelry runs from prehistoric Britain all the... | [] | [] | [
[]
] | |
2i6lri | Can someone tell me about the 17th-19th C History of Lower Silesia, Poland? | I'm currently doing some research into the Lower Silesia region of Poland, with a view to marketing it as a site for contemporary tourism, and as such have been looking into its past/history.
I have come across many references to a time when Lower Silesia was an *extremely* popular holiday destination for the European... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2i6lri/can_someone_tell_me_about_the_17th19th_c_history/ | {
"a_id": [
"ckzatbu"
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"text": [
"/u/Premislaus, I hope you don't mind me tagging you, you're just the only flaired user with Polish history in your flair :)"
]
} | [] | [] | [
[]
] | |
ezg6ki | How were WW2/WW1 ships repaired? | How were large sections of carriers' or battle ships' hills repaired? Were there prefabricated parts? and how would each individual naval port have the right prices for each ship? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ezg6ki/how_were_ww2ww1_ships_repaired/ | {
"a_id": [
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"text": [
"Repairs could be made in a number of ways, depending on the extent of the damage, the time pressure on the repair and the facilities available. Generally speaking, prefabricated parts were rare. Instead, repair crews would fabricate new pieces, ... | [] | [] | [
[]
] | |
2uwq0i | where does all the internet comes from and why the speed isn't the same everywhere? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2uwq0i/eli5_where_does_all_the_internet_comes_from_and/ | {
"a_id": [
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"score": [
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"text": [
"The Internet is just a bunch of servers and networks that are connected to each other, think of old school telephone operators, you pick up the phone, tell them who you want to talk to, and they connect you to them. This is basically what happens... | [] | [] | [
[]
] | ||
1j0gep | darren aronofsky's "the fountain" | I knew I was watching something very well done, but as for figuring out what actually happened in the movie... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1j0gep/eli5_darren_aronofskys_the_fountain/ | {
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"text": [
"There are three plot lines going on throughout the movie:\n\n1. In 1500, Queen **Isabella** of Spain wants to find the Fountain of Youth / Tree of Life in the Yucatan, and is threatened by the head of the Spanish Inquisition because of this. She... | [] | [] | [
[
"http://www.youtube.com/watch?v=UkVS5A5gfGs"
]
] | |
8hj3tn | Why do a large amount of Renaissance paintings have either bad or inaccurate anatomy in regards to humans? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8hj3tn/why_do_a_large_amount_of_renaissance_paintings/ | {
"a_id": [
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"text": [
"Hi there -- you may be interested in [this section of our FAQ](_URL_0_) which covers art in the Renaissance and touches on \"realism\" in painting. "
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/art#wiki_art_in_the_renaissance"
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3hk1d8 | why do some of my beard hairs grow in insanely thick while the rest are pretty normal? | I have a pretty good beard, but something odd happens. I have a few sporadic hairs that grow super quick and incredibly thick. When I say thick, I mean like 3-4x the thickness of my normal beard hairs. They are also much darker hairs. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3hk1d8/eli5_why_do_some_of_my_beard_hairs_grow_in/ | {
"a_id": [
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"text": [
"I, too, would like to know why this happens. Mine seem to be sort of brittle as well, and I generally can't stop myself from fiddling with them until they just sort of break off at the root, only to grow back in in a day or two."
]
} | [] | [] | [
[]
] | |
cm88nj | why is china lowering the yuan to a decade year low a big deal? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cm88nj/eli5_why_is_china_lowering_the_yuan_to_a_decade/ | {
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"text": [
"Does your country trade with China? If yes, the exchange rate is important.\n\nIf the Chinese Yuan (CNY) devalues, it means you can buy Chinese-made stuff cheaper. You are discouraged from buying local-made stuff since the p... | [] | [] | [
[],
[]
] | ||
a2nucu | Can more than two stars orbit each other, and is there a limit to how many stars there can be in the same multiple star system? | askscience | https://www.reddit.com/r/askscience/comments/a2nucu/can_more_than_two_stars_orbit_each_other_and_is/ | {
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"text": [
"More than two stars can orbit each other: in fact the closest extrasolar star system, Alpha Centauri, consists of two sunlike stars circling one another with a smaller red dwarf companion orbiting them... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Star_system#Septenary"
],
[
"https://en.wikipedia.org/wiki/Star_system#Hierarchical_systems"
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[]
] | ||
efkm33 | what exactly is blood pressure | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/efkm33/eli5_what_exactly_is_blood_pressure/ | {
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5,
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"text": [
"Blood runs in tubes around your body. These tubes are called blood vessels, and to drive the blood around the heart pumps all the time throughout our lives (the heart is pretty much a glorified muscle)... | [] | [] | [
[],
[],
[]
] | ||
1u5x5w | what is the difference between a web designer, a web developer, and a web programmer? | And what is the normal workflow when building a web site between the different specialties, to include database design on the server? And am I leaving anything out? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1u5x5w/eli5_what_is_the_difference_between_a_web/ | {
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"text": [
"From my limited experience as a network admin\nI'd say...\n\nWeb Designer: This guy has an art background\nand knows CSS and HTML.\n\nWeb Dev: This guy manages a little more than\nprograms. Although he... | [] | [] | [
[],
[],
[]
] | |
a46sul | what exactly causes our skin to "crawl" when we see something disturbing or unexpected? | Probably asked before, but exactly as the title says. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a46sul/eli5_what_exactly_causes_our_skin_to_crawl_when/ | {
"a_id": [
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"score": [
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"text": [
"That's your hair standing on end. Its caused by a hormone released in response to certain stresses. Its the same thing that makes a cats fur puff out when scared, and done for the same reason. Of course in cats and animals this makes them look bi... | [] | [] | [
[]
] | |
7imgg2 | why did 20th century bombs dropped from aircraft usually made high-pitched, loud whistle-like sounds while falling? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7imgg2/eli5_why_did_20th_century_bombs_dropped_from/ | {
"a_id": [
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"text": [
"The whistles were purposefully attached to the bombs. Their purpose was to weaken enemy morale and to enhance the intimidation of dive-bombing. Look at the Stuka dive-bomber, a similar case. What other purpose did it's sir... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Junkers_Ju_87#Ju_87B"
],
[]
] | ||
9yymle | why does romaine seem to be recalled so frequently, but other lettuces not so often? is there something about romaine that doesn't occur with green leaf, spinach, etc..? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9yymle/eli5_why_does_romaine_seem_to_be_recalled_so/ | {
"a_id": [
"ea540l2"
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"score": [
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"text": [
"I'm not sure if the premise is necessarily true: that Romaine is recalled more often. There is an outbreak E. Coli outbreak going on with Romaine this year, so it may seem that way. However, I certainly remember bagged lettuce being massively... | [] | [] | [
[
"https://www.thecut.com/2018/04/what-to-know-about-the-romaine-lettuce-recall-and-e-coli.html",
"https://www.wallacesfarmer.com/story-salinas-valley-company-recalls-lettuce-8-8960"
]
] | ||
e1ggh9 | Is arctic methane sequestered carbon? | I understand that the carbon in fossil fuels was once atmospheric carbon that became plants and such, then buried. Is the same true for the carbon of methane locked in the permafrost of the arctic regions? | askscience | https://www.reddit.com/r/askscience/comments/e1ggh9/is_arctic_methane_sequestered_carbon/ | {
"a_id": [
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"text": [
"Yes. The carbon in permafrost comes from organic matter that was originally in the soil before it froze (as is the case for essentially all soils on Earth)."
]
} | [] | [] | [
[]
] | |
3mgr3c | Would you say America wanted the Cold War more than the Soviets? In other words, did the U.S. "start" it? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3mgr3c/would_you_say_america_wanted_the_cold_war_more/ | {
"a_id": [
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2
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"text": [
"It's simplistic to attempt to attribute the Cold War to one side or the other. Here's the best (and so well written I'm just going to quote it) 'back of the envelope'analysis I've read. From Postwar, by Tony Judt. \n\n\n\"I... | [] | [] | [
[],
[]
] | ||
44w1hj | what is the difference between a home and a pro version of windows? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/44w1hj/eli5what_is_the_difference_between_a_home_and_a/ | {
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"text": [
"You won't probably feel the differences at home.\n\nThe main difference is the Pro editions can be joined to an Active Directory domain. The second is the built-in encryption system (BitLocker).\n\n\n"
]
} | [] | [] | [
[]
] | ||
5rwyml | do governments have plans set in the event of a contact with extra-terrestrial beings? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5rwyml/eli5do_governments_have_plans_set_in_the_event_of/ | {
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"Yes. But we can't tell you or we'll have to kill you. \n\nThere's alot of classified what-if plans. Some far-fetched like aliens land, some not like regional or national disaster. ",
"They proba... | [] | [] | [
[],
[],
[
"http://i.imgur.com/VNMm5dH.png",
"http://www.seti.org/post-detection.html"
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8ov3f3 | what is meritorious consideration in contract law? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8ov3f3/eli5_what_is_meritorious_consideration_in/ | {
"a_id": [
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"score": [
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"text": [
"In order for a contract to be valid, both parties have to get some sort of benefit from it. I give you $20, you mow my lawn, we are both getting something out of it. The legal term for this is a *consideration*, and a valid consideration is reg... | [] | [] | [
[]
] | ||
288dy0 | What were Teddy Roosevelt's views and political stance on race and equal rights? | I was reading in the post about his dislike of Jefferson, and the responder said "One example is when Roosevelt criticizes Benton and Jefferson both for their personal hypocrisies concerning the treatment of people of color. Roosevelt writes: "Like [Jefferson], [Benton] failed to see the curious absurdity of supporting... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/288dy0/what_were_teddy_roosevelts_views_and_political/ | {
"a_id": [
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"score": [
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"text": [
"Roosevelt's views on race were complicated but on the whole they were progressive for the period (haha). He did support black civil rights. However he spent a good bit of time in North Dakota, and while he was there he became convinced that the l... | [] | [] | [
[]
] | |
erzfu3 | What happens to the oil that we apply on our skin? | My sister has been recommending this massage place that she loves for all eternity now. So the other day I decided to try out. The masseuse applied plenty of oil over my body (so much that it seemed to drip) yet 30 minutes later I notice that my body is just as before. So my question is where did all the oil go? I know... | askscience | https://www.reddit.com/r/askscience/comments/erzfu3/what_happens_to_the_oil_that_we_apply_on_our_skin/ | {
"a_id": [
"ff7t6yu"
],
"score": [
15
],
"text": [
"Massage therapists use water-based lubricant, so the majority of the \"oil\" that they applied has simply evaporated. Only a small amount of non-water material remains.\n\nIf you were to try rubbing actual oil on your body, you would find that ... | [] | [] | [
[]
] | |
2rv42o | During WW2, how were the Soviets able to so out-produce Germany? | Reading *Russia's War* by Richard Overy, there were tables comparing the industrial output of Nazi Germany and the Soviet Union. From 1941-1944 Germany vastly outproduced the USSR in Coal, Steel and Aluminium. Only in Oil did the USSR maintain large superiority.
Yet in terms of military output, the USSR produced vast... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2rv42o/during_ww2_how_were_the_soviets_able_to_so/ | {
"a_id": [
"cnjyq9u"
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"text": [
"\nThe USSR had a much more intense wartime mobilization of their workforce. When it mattered.\n\nThe key area is in war-related industry, where from the start of the war until 1943 Germany only increased the workforce in miniscule ( < 1%) proport... | [] | [] | [
[]
] | |
281a15 | Why does music/sounds make me think of either shapes or a specific color pattern? | askscience | http://www.reddit.com/r/askscience/comments/281a15/why_does_musicsounds_make_me_think_of_either/ | {
"a_id": [
"ci6fl6f"
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"score": [
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"text": [
"You could have 'synesthesia' which is where the stimulation of one sense triggers another. There are various different types of synesthesia as we have many senses, but sound and vision seems to be the most common (of those who have synesthesia, w... | [] | [] | [
[
"https://en.m.wikipedia.org/wiki/Synesthesia"
]
] | ||
1na127 | if nazi war criminals were given (somewhat) fair trials at nuremberg then why wasn't osama bin laden given one? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1na127/eli5_if_nazi_war_criminals_were_given_somewhat/ | {
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"text": [
"Pretty much impossible to take him alive. The nazis surrendered and went to court. OBL spent a decade on the run, hiding with armed guards.",
"Because he shot at the people trying to capture him, an... | [] | [] | [
[],
[],
[]
] | ||
36dra6 | What is the difference between Roman concrete and modern concrete? Also have we "rediscovered" how Roman concrete was made? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/36dra6/what_is_the_difference_between_roman_concrete_and/ | {
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"text": [
"That's probably a better question for /r/askscience or engineering. Especially since there are many many many different types of concrete, high strength, corrosion resistant, sulfate resistant, asphalt... | [] | [] | [
[],
[],
[
"https://www.reddit.com/r/AskHistorians/comments/369ucz/or_they_used_concrete_medieval_europe_thought_the/",
"http://www.reddit.com/r/AskHistorians/comments/23893y/how_did_we_lose_the_ancient_roman_invention_of/",
"http://www.reddit.com/r/AskHistorians/comments/16mvvw/why_was_roman_concret... | ||
65bj6j | During the heyday of the Russian Empire, to what degree could Cossacks be considered state-sponsored military colonists (or a 'rank' of the Russian military), and to what degree could they be considered a cohesive ethnic group? | I'm asking because I'm doing a bit of research on militarized agricultural colonialism in the Japanese Empire and see frequent comparisons to the Cossacks. But, depending on what source I'm looking at, I get very different answers about whether 'being' a Cossack entails. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/65bj6j/during_the_heyday_of_the_russian_empire_to_what/ | {
"a_id": [
"dg9x448"
],
"score": [
2
],
"text": [
"While I can't answer, I'm really interested in your topic, militarized agricultural japanese colonialism. Do you have any good reading on that?"
]
} | [] | [] | [
[]
] | |
3lyjij | how do asians differentiate amongst people based on their countries? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3lyjij/eli5_how_do_asians_differentiate_amongst_people/ | {
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"text": [
"The same way everyone else does. You have difficulty telling Asian nationalities apart because it's not something you do on a regular basis. There are visible ways to tell, and people who are exposed to a wider diversity of ... | [] | [] | [
[],
[]
] | ||
4bx31k | why is it that sometimes japanese spellings of (video game, tv show, movie, etc) titles are just the sound of the english title written out, even though it comes from japan? | According to Wikipedia, the pronunciation of the JAPANESE title of [Dragon Ball](_URL_1_) and [Dragon Ball Z](_URL_0_) are Doragon Bōru and Doragon Bōru Zetto respectively. That doesn't seem to make sense to me, but it's not the first time I've come across situations like this. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4bx31k/eli5_why_is_it_that_sometimes_japanese_spellings/ | {
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4,
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"text": [
"Because they thought it sounded cooler that way. Also \"Zetto\" is probably coming from the Greek \"Zeta\" rather than English.\n\nFor example, rather than just translating \"Gojira\" to \"Gorilla Whal... | [] | [
"https://en.wikipedia.org/wiki/Dragon_Ball_Z",
"https://en.wikipedia.org/wiki/Dragon_Ball"
] | [
[],
[],
[]
] | |
3f927q | what happens to prisoners serving a 100+ year sentence when they start to get senile and old? do you die in prison the same way you normally would of old age? | i read an article about a man who served a 144 year sentence, do they just let you die in prison like you would normally of old age? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3f927q/eli5_what_happens_to_prisoners_serving_a_100_year/ | {
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"text": [
"Pretty much, yeah. If you have medical conditions that can't be properly attended to in prison you might be moved to a secure hospital, but they don't let you out. You will die in prison or some prison-like facility.",
"... | [] | [] | [
[],
[
"http://www.washingtonpost.com/sf/national/2015/05/02/the-painful-price-of-aging-in-prison/"
]
] | |
1lzn5j | After reading about Julius Caesar's Legion's dedication towards him, how did they react when they heard the news of his assassination? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1lzn5j/after_reading_about_julius_caesars_legions/ | {
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"text": [
"Well, by the time of Caesar's Assassination, the Legion had been disbanded and all the veterans had been given parcels of land to live out their days on.\n\nWhen Caesar was assassinated, however, the men must have been outraged simply out of the... | [] | [] | [
[]
] | ||
1gmrqu | Are diabetes and cancer fairly new illnesses or are they old yet not talked so much about like acne? | Does anyone know how far back they have existed and/or the ways they were treated? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1gmrqu/are_diabetes_and_cancer_fairly_new_illnesses_or/ | {
"a_id": [
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3
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"text": [
"On cancer, I can strongly recommend [Siddhartha Mukherjee's The Emperor of All Maladies](_URL_0_), which (among many other things) is a history of cancer and the ways we have treated it. (That is my source for the purposes o... | [] | [] | [
[
"http://www.amazon.com/The-Emperor-All-Maladies-Biography/dp/1439170916"
],
[]
] | |
8or3q9 | When a water filter (e.g. Brita filter) is past its expiration date, is it just not filtering very well anymore, or is it actively making the water worse? | askscience | https://www.reddit.com/r/askscience/comments/8or3q9/when_a_water_filter_eg_brita_filter_is_past_its/ | {
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"If it's unused and sealed properly it will be fine.\n\nIf it's exposed to oxygen both activated charcoal and DI resin will exchange with oxygen and redu... | [] | [] | [
[],
[
"http://www.wcponline.com/2009/06/13/chlorine-chloramine-removal-activated-carbon/"
],
[],
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2a20t4 | Is it true that Manuel I Komnenos aided the Turks/worked against the crusaders, during the Second Crusade? | Here's the quote from the [wiki article:](_URL_0_)
> The main Western Christian source, Odo of Deuil, and Syriac Christian sources claim that the Byzantine emperor Manuel I Comnenus secretly hindered the crusaders' progress, particularly in Anatolia where he is alleged to have deliberately ordered Turks to attack them... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2a20t4/is_it_true_that_manuel_i_komnenos_aided_the/ | {
"a_id": [
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"text": [
"Not really. It certainly seems that Manuel I was not particularly inclined to help the Crusaders and didn't go out of his way to make things easier for them but actually going so far as to ally himself with the Turks would be too far. It's worth... | [] | [
"http://en.wikipedia.org/wiki/Second_Crusade"
] | [
[]
] | |
bbzdpk | how did congress set their salaries? | Who was in charge of setting everyone in Congress's salaries, benefits, what Insurance provider do they go through? Do they all use the same Insurance provider? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bbzdpk/eli5_how_did_congress_set_their_salaries/ | {
"a_id": [
"ekmk6uf"
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"score": [
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"text": [
"Congress is in charge of the government's money, so they set their own salaries by passing the appropriate bill. The president still has veto power, of course, and any salary changes won't take place until after the next Congressional election. I... | [] | [] | [
[]
] | |
2r1hty | Is there an historical reason Turkey is considered part of Europe/Asia but Egypt is not considered Africa/Asia? | This is something that I've come back to a few times now recently, and I'm not sure who to ask.
Why is Turkey considered by many to be part of two continents when the area that is in Europe is so small, yet a larger portion of Egypt exits in Asia? I don't recall ever seeing anything that lists Egypt as part of Asia. ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2r1hty/is_there_an_historical_reason_turkey_is/ | {
"a_id": [
"cnbkir3"
],
"score": [
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],
"text": [
"One thing worth considering is that, since relative land area isn't a number most people have to hand, and it's not a very intuitive way of thinking about geography, relative land area just isn't an important factor in deciding which continent w... | [] | [
"http://en.wikipedia.org/wiki/List_of_sovereign_states_and_dependent_territories_by_continent"
] | [
[]
] | |
2ka2nz | Where do the particles to be fired in the Large Hadron Collider come from? | The LHD has particles collide at great speeds, sure. But where are these particles acquired? Is it some platinum bar that has flakes shaved off, then processed further to get even smaller stuff to fire? Is a quark captured when it radiates off of something? How do you 'load up' the LHD, and where does the stuff to coll... | askscience | http://www.reddit.com/r/askscience/comments/2ka2nz/where_do_the_particles_to_be_fired_in_the_large/ | {
"a_id": [
"cljehqj"
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"score": [
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],
"text": [
"The protons come from a bottle of hydrogen at LINAC 2. The gas is ionised in a device called a duoplasmatron (effectively a gas-filled discharge tube with a hole in the anode).\n\nFor the lead ions, an isotopically pure sample of ^(208)Pb is hea... | [] | [] | [
[
"http://home.web.cern.ch/about/updates/2013/02/heavy-metal-refilling-lead-source-lhc",
"http://home.web.cern.ch/about/accelerators",
"http://tesla.physics.wmich.edu/Accelerator_Handbook/Duoplasmatron/Introduction/"
]
] | |
nw2kt | Does the human inclination to eat things with a certain taste reflect deficiencies of certain nutrients in the body? | I know that a salt appetite can develop from a sodium deficient diet, does this mean that a person who lacks sufficient iron in their diet will be more inclined to eat an iron-rich food (steak, fish).
thanks | askscience | http://www.reddit.com/r/askscience/comments/nw2kt/does_the_human_inclination_to_eat_things_with_a/ | {
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10,
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],
"text": [
"Pica, intense cravings for non-food objects such as dirt, often results from iron deficiencies. It stands to reason that other food cravings could have similar roots...see [here... | [] | [] | [
[
"http://www.sciencedirect.com/science/article/pii/0195666390900232"
],
[
"http://www.reddit.com/r/askscience/comments/n1aaa/do_cravings_for_specific_kinds_of_food_mean/"
],
[
"http://www.sciencedirect.com/science/article/pii/0195666390900232"
],
[
"http://www.reddit.com/r/askscience/co... | |
277anz | what happened to aol, man? | They used to be such a huge company, they dominated the internet scene, and then like that...gone? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/277anz/eli5_what_happened_to_aol_man/ | {
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"text": [
"They're still around, mostly as a branding/media company. They own the Huffington Post, for example. (They own a lot of other properties and have an extensive online advertising ar... | [] | [] | [
[],
[],
[],
[]
] | |
3jyt6d | How did Nomads survive in Siberia? | Also, how did people survive in places such as Ireland and England prior to settling? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3jyt6d/how_did_nomads_survive_in_siberia/ | {
"a_id": [
"cutiplu"
],
"score": [
8
],
"text": [
"[Nomads still survive in siberia](_URL_0_). The nenet tribe follows herd of reindeer. They eat reindeer meat, wear reindeer fur, make tents from reindeer pelts, etc etc, and presumably have been doing so for a very long time.\n\nas for pre-histor... | [] | [] | [
[
"http://www.bbc.co.uk/tribe/tribes/nenets/index.shtml",
"http://www.bbc.co.uk/history/ancient/british_prehistory/iron_01.shtml",
"http://hraf.yale.edu/resources/faculty/explaining-human-culture/hunter-gatherers-foragers-2/"
]
] | |
miuhr | Why do dogs know our emotions and we know theirs? | Why does it seem that dogs are able to understand our emotions? Do their closest ancestors, gray wolves, share a similar affinity to be able to sense our emotions or have we simply bred that trait into our dogs?
And for that matter, why can we seem to understand cat and dog's emotions so well? Why can I tell when my... | askscience | http://www.reddit.com/r/askscience/comments/miuhr/why_do_dogs_know_our_emotions_and_we_know_theirs/ | {
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2,
3,
4,
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"text": [
"Evolutionary psychologists believe that it's all about facial expressions. Gestures aren't n... | [] | [] | [
[],
[
"http://email.eva.mpg.de/~tomas/pdf/Hare_Tomasello05.pdf"
],
[
"http://movies.netflix.com/WiMovie/National_Geographic_Science_of_Dogs/70144621?trkid=2361637",
"http://movies.netflix.com/WiMovie/Dogs_Decoded_Nova/70148726?trkid=2361637"
],
[],
[],
[
"http://email.eva.mpg.de/~tomas... | |
amov34 | why does eating a pound of food (or any amount) not cause you to weigh + that amount immediately after when stepping on a scale? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/amov34/eli5_why_does_eating_a_pound_of_food_or_any/ | {
"a_id": [
"efniapz"
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"score": [
4
],
"text": [
"It does, but typical hooman scales are horribly innacurate. Just ask any pugilist how much an average poo weighs before weigh-in."
]
} | [] | [] | [
[]
] | ||
1zchup | Was the split of Germany the main cause of the Cold War? | A question we were discussing in class, and just wondering if I forgot any points, thoughts, or viewpoints on this. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1zchup/was_the_split_of_germany_the_main_cause_of_the/ | {
"a_id": [
"cfsoks8"
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"score": [
2
],
"text": [
"The split of Germany was an early effect of the Cold War, more than a cause. Initially, all Germany was under the ultimate sovereignty of the Allied Control Council, where all four powers sat together and decisions were to be made by unanimous v... | [] | [] | [
[]
] | |
j39b7 | What are some good science books for lay folks? | Liberal arts background here. I've read "The Selfish Gene" and I'm currently reading Gleick's "Chaos." These are the closest books I've come to being reasonable reads for non-sciencey folks. Any other recommendations?
EDIT: Should add that I'm open to (and love) TED talks if anyone has any suggestions | askscience | http://www.reddit.com/r/askscience/comments/j39b7/what_are_some_good_science_books_for_lay_folks/ | {
"a_id": [
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4,
3,
3
],
"text": [
"Any particular field? I've recommended \"The Emotional Brain\" by Joseph LeDoux as a pretty good book on how we came to really understand the role of the amygdala in fear processing... if you're intere... | [] | [] | [
[],
[
"http://www.amazon.com/QED-Strange-Princeton-Science-Library/dp/0691125759"
],
[
"http://www.nytimes.com/2010/09/19/books/review/Morris-t.html"
]
] | |
11y3re | Who is more genetically similar to
you, your sibling or offspring? | askscience | http://www.reddit.com/r/askscience/comments/11y3re/who_is_more_genetically_similar_to_you_your/ | {
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84,
17,
2,
17,
595
],
"text": [
"On average it is the same, namely 50%\n\nYour offspring always carries 50% of your genetic payload, while with a sibling it can range between 0% and 100%... | [] | [] | [
[],
[],
[],
[
"http://i.imgur.com/vkd6D.jpg"
],
[
"http://www.reddit.com/r/askscience/comments/11dgcf/is_there_a_1_in_246_that_two_non_twin_siblings/c6ln27d"
]
] | ||
1i3rvp | What did the armies of The Battle of Tours consist of? | I think that this occurred before knighthood was big in Europe and I really have no idea how the Islamic army was set up at all. What were they like? Additionally, can anyone point me to some books about this event and those preceding and succeeding them? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1i3rvp/what_did_the_armies_of_the_battle_of_tours/ | {
"a_id": [
"cb0wkvm"
],
"score": [
4
],
"text": [
"The Muslim forces would have been almost exclusively armored cavalry with lances and long swords. They would have planned to simply charge and disperse the Frankish infantry. In the Middle Ages, infantry could usually not stand up to armored cava... | [] | [] | [
[]
] | |
1gy272 | Is it inherently easier to see something small and nearby than something big and far away? | Let's say I have a drawing on a 1-square-meter sheet of paper, suspended in the air 1 meter away from me. Let's say there's also a reproduction of that drawing, blown up to 4 square meters and suspended 4 meters away from me.
Is the large drawing going to be harder to see than the small drawing? Will details be more d... | askscience | http://www.reddit.com/r/askscience/comments/1gy272/is_it_inherently_easier_to_see_something_small/ | {
"a_id": [
"caoy0f9"
],
"score": [
4
],
"text": [
"`YouHaveShitTaste` seems to be trolling in that thread. \n\nFor someone who's young enough, and with good eyes, you're right: both drawings will occupy the same size on the retina, and thus, they'll be able to see them just as well.\n\nOlder peop... | [] | [
"http://www.reddit.com/r/gaming/comments/1gfi09/house_sitting_for_rich_folk_this_is_how_i_play/caju7ng"
] | [
[
"http://en.wikipedia.org/wiki/Vergence",
"http://en.wikipedia.org/wiki/Accommodation_%28eye%29"
]
] | |
3uqpb3 | why do all uk plugs have three prongs/ always have an 'earth' whilst most other counties only have two prongs? (or no earth?) | All my plugs have three prongs, presumably one is always earth, but literally every other country I've ever been to ( mostly in Asia) only have two, does this mean there is no earth? Is this more dangerous?
Thanks in advance!! 😊 | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3uqpb3/eli5_why_do_all_uk_plugs_have_three_prongs_always/ | {
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"cxgyovg",
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"cxh062d"
],
"score": [
3,
14,
2
],
"text": [
"It's due to the way the outlets are destined, in the UK, the earth/ground prong is longer than the other two, as it is inserted into the outlet, the other two holes are opened (they are closed when not... | [] | [] | [
[],
[],
[]
] | |
84pp63 | how can 2 switches wired to the same light be able to turn it on and off no matter the state of the other switch? | There is this light along my stairs which can be affected by both switches without intervention. (AKA no "OR" gates) How is this possible? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/84pp63/eli5_how_can_2_switches_wired_to_the_same_light/ | {
"a_id": [
"dvrcu5i"
],
"score": [
35
],
"text": [
"In household electric wiring, a three-way switch setup (common term) often involves wiring two double-pole switches a line, with the power source connected to one and the lamp connected to each other. In this case, each switch has two position... | [] | [] | [
[
"https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/3-way_switches_position_2.svg/300px-3-way_switches_position_2.svg.png"
]
] | |
5q9w5w | why does youtube's copyright law about songs not affect lyric videos? | While they're useful, the videos are pretty much a reupload of the song with subtitles, and from what I've heard youtubers can get a copyright strike from as little humming a song. I understand covers since they probably fall under the "transformative" category, but I doubt lyric videos do. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5q9w5w/eli5_why_does_youtubes_copyright_law_about_songs/ | {
"a_id": [
"dcxiwm2"
],
"score": [
3
],
"text": [
"If you make content or a music mix, you are to put the titles of songs used in your video description. Else they will will remove your video.\n\nMaking a lyric video counts as user made content (I guess). So as long you put credits in your descri... | [] | [] | [
[]
] | |
1lwzca | what does it mean for austrailia now that abbot is the pm? | Sweeping changes? Will day to day life be affected? If so many people were against Abbot, how did he win? Is he really that bad for Austrailia? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1lwzca/eli5_what_does_it_mean_for_austrailia_now_that/ | {
"a_id": [
"cc3kqkm",
"cc3tee3"
],
"score": [
7,
3
],
"text": [
"Tying to be as non-bias as possible. Your day to day life will not be affect aside from the fact that you might pay slightly higher taxes / you might receive slightly less services. A lot of people were against abbott on the... | [] | [] | [
[],
[]
] | |
mrkky | How does time near the speed of light work for two different frames of reference? | Ok, so I know the classic example of an astronaut leaving earth traveling at near the speed of light and then returning to find that time has passed much quicker on earth than in his speedy spaceship.
However, in my astronomy textbook it says that if there are two bodies moving relative to each other and each body ha... | askscience | http://www.reddit.com/r/askscience/comments/mrkky/how_does_time_near_the_speed_of_light_work_for/ | {
"a_id": [
"c33adv0",
"c33afft",
"c33adv0",
"c33afft"
],
"score": [
6,
4,
6,
4
],
"text": [
"Ah this is the classic [twin paradox](_URL_0_).\n\nSpecial relativity states that reference frames that are uniform are equivalent. i.e. they are either traveling at a constant spe... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Twin_paradox"
],
[
"http://en.wikipedia.org/wiki/Twin_paradox"
],
[
"http://en.wikipedia.org/wiki/Twin_paradox"
],
[
"http://en.wikipedia.org/wiki/Twin_paradox"
]
] | |
2a5vqx | what is the physics explanation behind 3d technology? | I recently completed a rigorous physics course that involved a few chapters on optics and light, and ever since I've been trying to figure out on my own how the 3D effect is produced. Anyone know? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2a5vqx/eli5_what_is_the_physics_explanation_behind_3d/ | {
"a_id": [
"cirsamw"
],
"score": [
3
],
"text": [
"One of the most compelling ways to convince the brain that you are seeing something that is 3D when it is actually an image on a flat surface is to feed a different image into each eye. This is how the old red/blue 3D glasses work—they project b... | [] | [] | [
[]
] | |
11tj8v | What are the environmental benefits to bringing wolves back to most of their native habitats? | Long story short i got into an argument with another student in one of my classes, he was deeply entrenched on the subject that all wolves should be killed "our ancestors killed them off for a reason", and that they are a huge drain on money and manpower for any rancher. I am trying to become a biologist and was embarr... | askscience | http://www.reddit.com/r/askscience/comments/11tj8v/what_are_the_environmental_benefits_to_bringing/ | {
"a_id": [
"c6pg9py",
"c6pgbxh",
"c6pgha1",
"c6plrrh"
],
"score": [
11,
4,
10,
3
],
"text": [
"This is an important recent study that you should read about trophic cascades between wolves, elk and aspen in Yellowstone. Basically, having a top predator back in the system ha... | [] | [] | [
[
"http://www.cof.orst.edu/leopold/papers/2001trophiccascades.pdf"
],
[],
[
"http://www.bioone.org/doi/abs/10.1641/0006-3568%282004%29054%5B0755:WATEOF%5D2.0.CO%3B2"
],
[]
] | |
6utfhy | what did the idea of "Gross" look like before the development of germ theory? how quickly did germ theory change the daily habits of common people? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6utfhy/what_did_the_idea_of_gross_look_like_before_the/ | {
"a_id": [
"dlvqwi7"
],
"score": [
6
],
"text": [
"I\"m only a dabbler in historical knowledge, but in this case I think you may be looking for more of an anthropological or sociological answer. The thing is that even with modern germ theory a lot of this comes down to culture and in my limited e... | [] | [] | [
[]
] | |
2hlnz2 | how do testicles not get wrapped around each other inside the scrotum? | I need to know, I'm kind've terrified by the notion of them getting twisted together. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2hlnz2/eli5_how_do_testicles_not_get_wrapped_around_each/ | {
"a_id": [
"cktsyqu",
"ckttg0e",
"cktvoic"
],
"score": [
6,
12,
2
],
"text": [
"They can. It's called testicular torsion.",
"Your balls are seperated by a thin wall so they cant tangle each other. However one testicle can twist around itself causing testicular torsion.",
... | [] | [] | [
[],
[],
[]
] | |
73j5i7 | why can’t video games make walking/running look realistic? | Video games have seen major innovations in recent years, with incredible graphics, new forms of interaction like VR, and more complicated algorithms.
But while playing FIFA 18, I noticed that players running around still have the illusion that their feet are sliding around. It seems that their feet are never actually... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/73j5i7/eli5_why_cant_video_games_make_walkingrunning/ | {
"a_id": [
"dnqplba",
"dnqpp3y",
"dnqzg48"
],
"score": [
3,
10,
2
],
"text": [
"there are generally 2 ways to do this:\n\n- Physics simulation: use the momentum of the character to calculate where the legs/feet should go in order to provide the proper change in direction. In real ... | [] | [] | [
[],
[
"https://youtu.be/Rpr1SIvL4Gg"
],
[
"https://youtu.be/wlndIQHtiFw",
"https://youtu.be/Ul0Gilv5wvY"
]
] | |
du6q8a | Why was Australia not discovered by the Chinese first? | From a geographical standpoint, it would be alot easier for the Chinese to find Australia before the English.
How did they not stumble across it first?
Is there any record of them finding it? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/du6q8a/why_was_australia_not_discovered_by_the_chinese/ | {
"a_id": [
"f72l2ia"
],
"score": [
32
],
"text": [
"I am not an expert on China, and can't say much about Chinese sea-faring. I can however correct a few misconceptions here.\n\nIndigenous Australians first discovered Greater Australia at least 60,000 years ago.\n\nVisits from Austronesian seafar... | [] | [] | [
[]
] | |
6ghn45 | So what would happen if you took off your helmet on mars? It has a form of an atmosphere so I wouldn't imagine it'd be the same effect as space. How long would you have to live and what's the most likely cause of death? | askscience | https://www.reddit.com/r/askscience/comments/6ghn45/so_what_would_happen_if_you_took_off_your_helmet/ | {
"a_id": [
"diqxs8x"
],
"score": [
17
],
"text": [
"It does have an atmosphere, but its density is so low that for all practical purposes (at least from the point of view of human respiration) it is equivalent to a vacuum.\n\nThe effect will be exactly the same as in space: Your lungs lose oxygen... | [] | [] | [
[]
] | ||
xf8n5 | Explain this hoverboard design and why I shouldn't get excited. | _URL_0_ | askscience | http://www.reddit.com/r/askscience/comments/xf8n5/explain_this_hoverboard_design_and_why_i_shouldnt/ | {
"a_id": [
"c5ltxjr",
"c5lugso",
"c5lw1k0"
],
"score": [
9,
39,
9
],
"text": [
"Looks like it's based on electromagnets, which if I'm not mistaken means for you to go all back to the future with it would require roads that would produce a magnetic field to repel against. ",
"... | [] | [
"http://hoverboardproject.com/"
] | [
[],
[
"http://www.youtube.com/watch?v=uHEQgjNcFBo",
"http://www.youtube.com/watch?v=glCNP6qH_Dc"
],
[]
] | |
395770 | When did humans realize clouds are evaporated water? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/395770/when_did_humans_realize_clouds_are_evaporated/ | {
"a_id": [
"cs0rgp7"
],
"score": [
2
],
"text": [
"We had a thread similar to this a few months back. From [What did people think clouds were before we could scientifically describe them?](_URL_0_), /u/RomeosDistress quotes Augustine of Hippo (354-430 CE):\n\n > The clouds, according to the testi... | [] | [] | [
[
"http://redd.it/2fenjh"
]
] | ||
34fd0c | How factionalized was the German government during Nazi rule and how did factional infighting affect the war effort? | I read a biography on Reinhard Heydrich and I was surprised by the sheer amount of competing factions in the Nazi government. However since the biography did focus on Heydrich, the book only mentioned political factions when it concerned Heydrich's power. How many factions were there, how influential were these faction... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/34fd0c/how_factionalized_was_the_german_government/ | {
"a_id": [
"cqu4e77"
],
"score": [
2
],
"text": [
"An interesting source here is Albert Speer's *Infiltration*; Speer was Hitler's Minister of Armaments after 1942, and the book is largely about the way Himmler's SS and the Ministry of Armaments kept butting heads. To hear Speer tell it, Himmler'... | [] | [] | [
[]
] | |
9tphc1 | usage factor on electricity bill | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9tphc1/eli5_usage_factor_on_electricity_bill/ | {
"a_id": [
"e8y53se"
],
"score": [
2
],
"text": [
"Some electrical companies charge you based on \"demand\" or \"peak\" or \"load\", rather than a flat rate. \n\nSo, basically, when you consume your kwh at night, the power plant is not busy and can easily supply it, but if you consume it during ... | [] | [] | [
[]
] | |
2utepi | why when a drop of water lands on a piece of paper and it dries the paper is left wrinkled at that spot. | Smooth paper is left wrinkled when exposed to water. It seems to happen to every kind of paper. What is happening to cause the wrinkles? Why doesn't it flatten out again when it dries? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2utepi/eli5why_when_a_drop_of_water_lands_on_a_piece_of/ | {
"a_id": [
"cobl233"
],
"score": [
3
],
"text": [
"I have no evidence but my thought is that the fibers of the paper likely swell and rearrange themselves as they push outward in their swelling. Try getting a piece of paper wet and leaving something quite heavy on top of it to see if that changes... | [] | [] | [
[]
] | |
ash2kw | How are underwater tunnels built? (Such as the one from Copenhagen to Malmö) Additionally, what steps and precautions are taken to ensure it will not flood both during and after construction? | askscience | https://www.reddit.com/r/askscience/comments/ash2kw/how_are_underwater_tunnels_built_such_as_the_one/ | {
"a_id": [
"eguhrfw",
"eguuboz",
"eguy2cv",
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"egv3tpf",
"egvg52o",
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"egvopog",
"egvqqpd",
"egvt9xe",
"egw4gsq"
],
"score": [
2198,
75,
58,
115,
21,
7,
14,
9,
3,
7,
2
],
"text": [
"This is called an... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Submerged\\_floating\\_tunnel",
"https://en.wikipedia.org/wiki/Submerged_floating_tunnel",
"http://www.railsystem.net/immersed-tube-tunnel/"
],
[
"https://www.youtube.com/watch?v=9oZqYLGNzKE"
],
[
"https://en.wikipedia.org/wiki/Transbay_Tube"
],
[
... | ||
1lvwud | Why is thunder a low-pitch rumbling instead of a high-pitch blast? | askscience | http://www.reddit.com/r/askscience/comments/1lvwud/why_is_thunder_a_lowpitch_rumbling_instead_of_a/ | {
"a_id": [
"cc3dx5c"
],
"score": [
8
],
"text": [
"Audio engineer here, I would think it has to do with the wavelength of the different frequencies of the audible frequency band. Lower sounds (bass) have much longer wavelengths, and therefore do not produce a full wave (compression/rarefaction) ... | [] | [] | [
[]
] | ||
eu6n77 | how/why does it benefit the us dollar when saudi arabia uses it exclusively when selling oil? also, why do a lot of places outside of the us accept/favour the us dollar? | Why does the US want Saudi Arabia to sell oil exclusively using the US dollar? Also, why do a lot of places outside of the US accept/favour the US dollar? Is there something particularly special about it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eu6n77/eli5_howwhy_does_it_benefit_the_us_dollar_when/ | {
"a_id": [
"fflyde2",
"ffme74h"
],
"score": [
4,
4
],
"text": [
"If the dollar weakens, a barrel of oil will still cost the same amount for American customers.\n\nThe price paid will only be based on the oil market at the time, rather than how many pounds, euros, etc the dollar is worth."... | [] | [] | [
[],
[]
] | |
2jl5wy | will wearing glasses daily deform your skull? | I've been wearing glasses for 10+ years and I've noticed indents where they sit on the side of my head. Is that an indent in the skull or just the tissue? Would they go away with the absence of glasses? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2jl5wy/eli5_will_wearing_glasses_daily_deform_your_skull/ | {
"a_id": [
"clcqmzx",
"clcqund",
"clcrcex",
"clcsjjp",
"clct8g7"
],
"score": [
3,
5,
7,
3,
2
],
"text": [
"Anecdotal evidence only: My wife, who is 46, has been wearing glasses since she was 4 or 5. There are indentations in the bone on the side of her head where t... | [] | [] | [
[],
[],
[],
[],
[]
] | |
dthuhm | how do contactless payments through a phone work without service or wifi? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dthuhm/eli5_how_do_contactless_payments_through_a_phone/ | {
"a_id": [
"f6wnsgi",
"f6wq6xv"
],
"score": [
11,
2
],
"text": [
"Your phone creates a \"virtual card\" of sorts. Your normal card is just a collection of data like serial numbers, account number etc that tells the card reader how to withdraw money. Your phone simply creates similar card,... | [] | [] | [
[],
[]
] | ||
4y83k9 | how do home routers work and what do the various bands do? | I pay for decent internet service (90Mbps) but speed test maxes out at about 2MBps download speed. While I am not a wireless technician I know this is off and have heard talk of various bands that I can switch to or change. I have absolutely no idea how home networks in general function and how I might improve them so ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4y83k9/eli5_how_do_home_routers_work_and_what_do_the/ | {
"a_id": [
"d6lpo6e",
"d6ltywn"
],
"score": [
3,
2
],
"text": [
"Quite likely you are just being defrauded by your ISP provider, Just because you are paying for it does not mean you are getting it.\n\nYour download speed will be determined by your weakest link. Get a friend to come by wit... | [] | [] | [
[],
[]
] | |
56gbek | If a huge and dense enough amount of coherent light was emitted, would it create a black hole traveling at the speed of light? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/56gbek/if_a_huge_and_dense_enough_amount_of_coherent/ | {
"a_id": [
"d8j3gn4",
"d8je9nq"
],
"score": [
249,
9
],
"text": [
"A system of photons all moving in the same direction has no invariant mass, so you can Lorentz-transform into a frame where they have arbitrarily small energy. And in such a frame, it's clear that they should not form a bl... | [] | [] | [
[],
[
"https://youtu.be/gNL1RN4eRR8"
]
] | |
3phfq5 | why do animals not seem to need the vitamins that humans do? | I get that their bodies are different and all but isn't our biological make up the same? My dog never eats oranges and doesn't have scurvy. Why can't I just eat meat and be good to go? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3phfq5/eli5_why_do_animals_not_seem_to_need_the_vitamins/ | {
"a_id": [
"cw6apgr"
],
"score": [
2
],
"text": [
"First, you don't NEED a lot of vitamins. You benefit from their presence, but you can survive without them. \n\nBut for some of the ones you do need that animals don't seem to, it's because our bodies have evolved somewhat counterproductively to ... | [] | [] | [
[]
] | |
2c64xj | why is aids poked fun at by comedians and shows like south park while diseases like cancer aren't? | Why is AIDS made fun of by crude comedians and tv shows while cancer isn't? Is cancer somehow more taboo than AIDS? Where did the laughability of AIDS come from? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2c64xj/eli5_why_is_aids_poked_fun_at_by_comedians_and/ | {
"a_id": [
"cjcapcm",
"cjcat3j",
"cjcaubi",
"cjceadj"
],
"score": [
2,
3,
3,
2
],
"text": [
"According to the South Park episode, AIDS is declared officially funny. And dude comedians make fun of almost every disease. Except birth defects. That's just a comedy killer. ",
... | [] | [] | [
[],
[],
[],
[]
] | |
6nvhh4 | if most money is just numbers in a database, how come we don't hear of hackers who break in and just increase their account balance? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6nvhh4/eli5_if_most_money_is_just_numbers_in_a_database/ | {
"a_id": [
"dkcieje"
],
"score": [
3
],
"text": [
"Accounting and balance sheets. Every debit has to have a credit, and every credit a debit...or it will show up as out of balance. If there were to be a balancing entry in the respective offset account, then maybe it would go undetected...but none... | [] | [] | [
[]
] | ||
1apq4a | why news reports always use the word "allegedly" even if there is proof of something? | Basically, anytime you see a news story, they always state "The alleged thief was caught on camera and sentenced", or "The victim was allegedly stabbed to death". Why do they ALWAYS use this word? As far as I know, allegedly (alleged) can have many different meanings, however the very first meaning is *to assert withou... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1apq4a/eli5why_news_reports_always_use_the_word/ | {
"a_id": [
"c8zlkes",
"c8zm0g6"
],
"score": [
3,
2
],
"text": [
"Legally people are innocent until proven guilty. While they have arrested someone and charged them with say thievery, until the trial convicts them they are simply a \"suspect\" and not a thief. News agencies therefore canno... | [] | [] | [
[],
[]
] | |
37spm8 | how do gift cards for multiple restaurants/stores work? | I understand they are all owned by the same corporation, but how does the money get spread out?
An example is Cara Operations in Canada, they own several restaurant chains such as Harvey;s, Swiss Chalet, Kelsey's, Milestones, and Montana's. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/37spm8/eli5_how_do_gift_cards_for_multiple/ | {
"a_id": [
"crpj3yf"
],
"score": [
2
],
"text": [
"It gets split up when you purchase an item.\n\nWhen you purchase a gift card at Swiss Chalet, you're really purchasing fake-money only usable at Cara Operations' stores. I'm sure in Cara's accounting books they have a big bucket for all the giftc... | [] | [] | [
[]
] | |
5jgmyf | why do black americans seem to be affected by slavery more so than people of other ethnicities are affected by the generational atrocities committed against their people? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5jgmyf/eli5_why_do_black_americans_seem_to_be_affected/ | {
"a_id": [
"dbg0c9h",
"dbg0iox",
"dbg0r2m",
"dbg0sun",
"dbg2uxi",
"dbg3dwl"
],
"score": [
5,
3,
14,
8,
4,
21
],
"text": [
"They aren't. Plenty of people around the world have it worse than African Americans. There are even places in the world that still pra... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
7tljfp | What the heck is with Switzerland? How have they avoided almost every single major European war or conflict for the past 600 years or so? Is it due to their geographical location, their banks, or a third factor? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7tljfp/what_the_heck_is_with_switzerland_how_have_they/ | {
"a_id": [
"dtdjint"
],
"score": [
32
],
"text": [
"First to just clarify, Switzerland has participated in some large conflicts during the last 600 years, most recently the Napoleonic wars, though they have been neutral since. I will mostly touch on the world wars but most of the points apply to ... | [] | [] | [
[]
] | ||
6kaxzf | why is the death rate for alzheimer's so incredibly low in japan? | In Canada, the death rate per 100,000 for Azlheimer's is 35.50. In France, it's 25.62. In the US, it's 45.58. In Japan, on the other hand, the death rate is staggeringly low at 4.23.
Logically, one would expect Japan to have an even higher death rate from Alzheimer's than most countries given that Alzheimer's affects ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6kaxzf/eli5_why_is_the_death_rate_for_alzheimers_so/ | {
"a_id": [
"djkn01w",
"djko1by",
"djkqmqp",
"djl2s5p",
"djl5gtg"
],
"score": [
3,
3,
19,
2,
2
],
"text": [
"I could imagine diet and life style play a part. From what I understand people in Japan eat a very healthy diet with very little processed foods. This genera... | [] | [
"http://www.worldlifeexpectancy.com/cause-of-death/alzheimers-dementia/by-country/"
] | [
[],
[],
[],
[],
[]
] | |
yvh0f | What would a nuclear detonation on the surface of the Earth look like from the ISS or similar orbiting platform? | Assuming the bomb is something in the range of 20 to 50 Megatonnes | askscience | http://www.reddit.com/r/askscience/comments/yvh0f/what_would_a_nuclear_detonation_on_the_surface_of/ | {
"a_id": [
"c5z7fxb"
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"score": [
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"text": [
"Okay. The ISS orbits between 200 and 250 miles high. A 20 megaton bomb will produce a fireball [about 2 miles in diameter](_URL_1_). It will cause a \"conflagration\" [40 miles in diameter](_URL_0_).\n\nWhat would this look like from 200 miles aw... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Effects_of_nuclear_explosions",
"http://en.wikipedia.org/wiki/File:Comparative_nuclear_fireball_sizes.svg",
"http://i.imgur.com/sZUCu.jpg"
]
] | |
7hhfhs | Why don't microorganisms die from cold temperatures? | I know they can die from very high heat and are only inactive in cold temperature (not dead). I mean humans can't thrive in cold climate without any really thick clothing. How do microorganism not die from cold temperatures? | askscience | https://www.reddit.com/r/askscience/comments/7hhfhs/why_dont_microorganisms_die_from_cold_temperatures/ | {
"a_id": [
"dqscbbw"
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"score": [
2
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"text": [
"Microorganisms have adapted to a range of extreme environments, including extreme cold. Every microorganism will have an ideal temperature range for growth and a temperature range at which they survive, and most microorganisms cannot grow at low/... | [] | [] | [
[]
] | |
9eptip | how a country like venezuela in such financial and institutional chaos can ever recover. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9eptip/eli5_how_a_country_like_venezuela_in_such/ | {
"a_id": [
"e5qlebh",
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"score": [
6,
4
],
"text": [
"Define \"recover\". The government may be deposed violently, a bunch of people may starve or flee the country, but they aren't entirely without resources so a smaller population could be supported. Alternatively the current ... | [] | [] | [
[],
[]
] | ||
1plsbz | If I go headlong toward a black hole, accelerating to near the speed of light, will time dilate so I never actually get there? | The faster you go, according to relativity, the more time slows down. If I travel directly toward a black hole, accelerating as fast as I can, will I ever get there? Will time dilate so that it will just slow down and leave me hanging on the precipice? What will happen? | askscience | http://www.reddit.com/r/askscience/comments/1plsbz/if_i_go_headlong_toward_a_black_hole_accelerating/ | {
"a_id": [
"cd3su9f",
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"score": [
9,
3
],
"text": [
" > The faster you go, according to relativity, the more time slows down.\n\nThis is what other people, who aren't moving with you, see happen to your clock. You, on the other hand, experience time passing perfectly normal wh... | [] | [] | [
[],
[]
] | |
6rf2ks | In the USA before soft drinks were invented, what were the recreational drink of choice for non-alcohol drinkers? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6rf2ks/in_the_usa_before_soft_drinks_were_invented_what/ | {
"a_id": [
"dl5bevk",
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"score": [
33,
5,
728
],
"text": [
"Hi there people!\n\nThis thread is rising currently on the sub and so I am here to remind people that we have [rules for answers](_URL_4_) in place. Answers should be:\n\n* in-depth, comprehensive, a... | [] | [] | [
[
"http://twitter.com/askhistorians",
"https://www.reddit.com/r/AskHistorians/wiki/bestof",
"http://www.reddit.com/r/AskHistorians/search?q=title%3A%22Sunday+Digest%22&restrict_sr=on&sort=new&t=all",
"https://www.facebook.com/askhistorians/",
"https://www.reddit.com/r/AskHistorians/w... | ||
3a3wx4 | In the study of epigenetics, how do we know a given gene is being expressed? | What techniques are used in the field? Would a DNA sample reveal the epigenome or is more information necessary? | askscience | http://www.reddit.com/r/askscience/comments/3a3wx4/in_the_study_of_epigenetics_how_do_we_know_a/ | {
"a_id": [
"cs9hmya",
"cs9igb4",
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"score": [
3,
3,
6
],
"text": [
"Epigenetic regulations can occur on the DNA of a cell. DNA is packed in proteins (histones), and on these histones epigenetic regulations also occur. A well-known epigenetic marker on DNA is DNA-methyla... | [] | [] | [
[],
[],
[
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2644350/",
"https://en.wikipedia.org/wiki/Chromatin",
"https://en.wikipedia.org/wiki/Histone_code",
"https://en.wikipedia.org/wiki/Nuclear_run-on"
]
] | |
97qtij | why haven't we invented a better way to clean teeth than brushing/flossing? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/97qtij/eli5_why_havent_we_invented_a_better_way_to_clean/ | {
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"e4ad675",
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"score": [
170,
7,
12,
8,
618,
46,
233,
5,
... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"https://mk0yoniliferixmrukax.kinstacdn.com/wp-content/uploads/sites/6/2017/05/IMG_0559.jpg",
"https://en.wikipedia.org/wiki/Miswak"
],
[]
] | ||
1wqnv4 | When/Why did it stop being acceptable for Western aristocrats/noblemen to take mistresses? How was this practice reconciled with Christian doctrine forbidding adultery? | My first question is whether I am indeed correct in my understanding that the practice of both taking mistresses/concubines by noblemen was both widespread and acceptable. By acceptable, I mean the sort of thing for which there was no, even theoretical, objections most people would raise (jealously from a man's wife be... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1wqnv4/whenwhy_did_it_stop_being_acceptable_for_western/ | {
"a_id": [
"cf4qm51",
"cf4r1wv"
],
"score": [
9,
8
],
"text": [
"This has not disappeared, but depends on the country. Mistresses are common in France - for instance [François Mitterand](_URL_0_) was well known to have a mistress.",
"To this day, the morality of extra-marital relation... | [] | [] | [
[
"http://www.independent.co.uk/news/world/widows-in-weeds-mourning-mistresses--plus-ca-change-to-the-french-1323906.html"
],
[]
] | |
4affit | Is it true that all ocean dwelling mammals have a terrestrial ancestor? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/4affit/is_it_true_that_all_ocean_dwelling_mammals_have_a/ | {
"a_id": [
"d10hag3"
],
"score": [
13
],
"text": [
"Yes it is accurate. You can see in the physiology of the mammals why this is the case. If you look at the tail fluke, you'll see that marine mammals have a [horizontal](_URL_0_) fluke whereas fish like sharks have a [vertical](_URL_1_) fluke. Th... | [] | [] | [
[
"https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTfzg5bcnF1BhGK9AJR0G5MVnK_VF3c9XhPlOuFRpvlxi4MmuHg",
"https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSZeUIJPN4wEZzZbn5NRR1_XGINRzNSJhVZyD0GxQxxRfQMlTNX"
]
] |
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