q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
value | subreddit stringclasses 3
values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
|---|---|---|---|---|---|---|---|---|---|
2dysuw | I've heard a lot of people say that it is "unhealthy" to work nights and sleep in the daytime and could cause health problems later in life. But why? | askscience | http://www.reddit.com/r/askscience/comments/2dysuw/ive_heard_a_lot_of_people_say_that_it_is/ | {
"a_id": [
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42,
4
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"text": [
"One of our primary sources of vitamin D is sunlight. At first, given lack of sunlight, you'll get [SAD](_URL_0_) (Seasonal Affective Disorder). With continued deprivation, [your bones will get weaker](... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Seasonal_affective_disorder",
"http://en.wikipedia.org/wiki/Osteomalacia"
],
[
"http://www.nature.com/ijo/journal/v34/n3/abs/ijo2009255a.html"
],
[]
] | ||
33yp1h | why is that when i choose random on a playlist of thousands of songs, the same few songs seem to play first every time? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/33yp1h/eli5_why_is_that_when_i_choose_random_on_a/ | {
"a_id": [
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"score": [
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2
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"text": [
"The possibilities are:\n\n* Bad luck, but the device does do \"random\" well enough.\n* The device has a poor randomizing algorithm (because nothing in computing actually is random, it just looks that way)\n* Observational b... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Birthday_problem"
]
] | ||
1199xv | If a fast object, say 90% of the speed of light
travels around the earth, can it catch up to it's own
sound? If so, what happens? | askscience | http://www.reddit.com/r/askscience/comments/1199xv/if_a_fast_object_say_90_of_the_speed_of_light/ | {
"a_id": [
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"score": [
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"text": [
"In order for it to have sound, it would have to be travelling through the atmosphere. I guess \"sound\" is a mild way to describe what would be happening.\n\nIt would be a fireball. The air would be massively heated and if it was travelling at .9... | [] | [] | [
[]
] | ||
3w5qyp | Greek/Roman Rhetoric - what sort of techniques would an orator utilize? | Several years ago in one of my high school level latin classes, I recall a discussion about techniques used by the Roman orators. My memory is rather hazy on the matter, but I think these sort of "tips" were mentioned: saying things in threes (i.e. "We must fight for love, liberty, and freedom!"), using gestures/body ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3w5qyp/greekroman_rhetoric_what_sort_of_techniques_would/ | {
"a_id": [
"cxtu6eq"
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"score": [
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"text": [
" > In short, what sort of techniques were used by Greek or Roman orators?\n\nThere isn't really any short version. Oratory was, along with verse, the singlemost studied and complex literary form of the ancient world. Entire careers were spent per... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3gs1n3/in_the_tv_show_rome_by_hbo_people_adopt_weirdly/"
]
] | |
2in6tb | Gravity constant at single point on earth? | I know that gravity is stronger or weaker depending where you are on earth, but what about a single spot? Does gravity stay constant when measured over a period of time in a single spot on earth or does even in the same location vary? | askscience | http://www.reddit.com/r/askscience/comments/2in6tb/gravity_constant_at_single_point_on_earth/ | {
"a_id": [
"cl3nicj",
"cl3rmn3"
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"score": [
4,
3
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"text": [
"The gravity on a single spot varies by the second. This is how they measure magma-flows in areas where it's close to the surface (to predict eruptions). The difference in density of the magma causes the gravitational changes... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Earth_tide"
]
] | |
2fyqk3 | what constitutes a draw in chess? why does it seem as though a draw happens when it looks like a normal game going on? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2fyqk3/eli5_what_constitutes_a_draw_in_chess_why_does_it/ | {
"a_id": [
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"score": [
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2,
2
],
"text": [
"There are several situations where a draw may occur, and while it may seem like a \"normal\" game is going on to the average person, a trained eye would identify them pretty easily usually:\n\n* One pl... | [] | [] | [
[],
[],
[]
] | ||
g05rhc | How and why does toothpaste foam up when you brush your teeth? | askscience | https://www.reddit.com/r/askscience/comments/g05rhc/how_and_why_does_toothpaste_foam_up_when_you/ | {
"a_id": [
"fnbt4mj"
],
"score": [
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],
"text": [
"Among the ingredients that toothpastes contain (the vast majority) is sodium lauryl sulfate, which is the detergent that creates the foam. The detergents are important 'cause they may help increase the solubility of plaque and accretions during b... | [] | [] | [
[]
] | ||
22nofe | since saliva starts the digestion of food in our mouths, why is it that neither our tongue or any other parts of our bodies that get saliva on them are dissolved? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22nofe/eli5since_saliva_starts_the_digestion_of_food_in/ | {
"a_id": [
"cgol8lv"
],
"score": [
7
],
"text": [
"Saliva only contains amylase and lysozymes, which digests complex carbohydrates like that found in bread and carbohydrates found on the surface of bacteria.\n"
]
} | [] | [] | [
[]
] | ||
8t34e4 | Was the nazi party right in it's assertion that the treaty of Versailles was the primary cause of the economic decline of Germany? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8t34e4/was_the_nazi_party_right_in_its_assertion_that/ | {
"a_id": [
"e14ey4t"
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"score": [
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"text": [
"From [an earlier answer of mine](_URL_0_)\n\n > Was the nazi party right in it's assertion that the treaty of Versailles was the primary cause of the economic decline of Germany?\n\nNot really. While the German economic situation after 1929 was q... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/89u5t9/in_a_prominent_eli5_today_i_read_germanys/dwtut5x/?context=1"
]
] | ||
16wwtc | Why is Chile shaped so oddly? ( i.e Why is it so long and narrow?) | I had always assumed it was due to geography, the east of Chile being bound by the Andes.
However, this comment _URL_0_
seems to indicate that Chile's borders are a result of not wanting to give Argentina access to the Pacific ocean.
I can't find anything to substantiate that and am therefore skeptical but he said ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/16wwtc/why_is_chile_shaped_so_oddly_ie_why_is_it_so_long/ | {
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"text": [
"If anything prevents Argentine access to the Pacific Ocean, it's the Andes Mountains. The sea route around the southern tip of the continent is dangerous,... | [] | [
"http://www.reddit.com/r/MapPorn/comments/16vvjs/length_and_width_of_chile_oc_1049x540/c7zwip7"
] | [
[
"http://en.wikipedia.org/wiki/Boundary_treaty_of_1881_between_Chile_and_Argentina"
],
[],
[],
[
"http://cl.kalipedia.com/kalipediamedia/geografia/media/200806/05/geochile/20080605klpgeogch_24_Ges_SCO.png"
],
[]
] | |
93129c | Could we theoretically see outside the observable universe through observations on the matter within it? | This is just a thought experiment, but I’m thinking about the statement that we can’t know anything about what is outside our observable universe based on the fact that the information has not had time to travel to us.
So we know that every point in the universe is the centre of its own observable universe. Imagine a ... | askscience | https://www.reddit.com/r/askscience/comments/93129c/could_we_theoretically_see_outside_the_observable/ | {
"a_id": [
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"score": [
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3
],
"text": [
"It is not possible to make any observation of the region of the universe outside of the observable universe. See [this post](_URL_0_) for more details.\n\nThe light we receive now from galaxies near the edge of the observab... | [] | [] | [
[
"https://www.reddit.com/r/askscience/comments/8v3adw/are_we_gravitationally_attracted_to_things/e1k8mej/"
],
[]
] | |
1o82bd | why are musical notes the pitches that they are? why not smaller or bigger increments in frequencies? and who decided this? | Just started learning piano and my curious mind can't stop thinking about it:
For example, why not 16 notes in a standard scale,with the difference in pitch cut in half, instead of 8?
Why does a standard major scale go in steps of whole-whole-half-whole whole-whole-half? And why does this sound normal as opposed to ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1o82bd/eli5_why_are_musical_notes_the_pitches_that_they/ | {
"a_id": [
"ccpm54y",
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5
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"text": [
"Let's start from simple things. If you played 8 whole notes you would arriving at a different note. Tones and half tones are such that after 8 notes you're at the exact double frequency. \nAnd if you p... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Consonance_and_dissonance#Dissonance"
],
[
"http://www.wolframalpha.com/input/?i=graph+sin%28x%29+%2B+sin%281.498301+*+x%29+from+x%3D0+to+x%3D500",
"http://www.wolframalpha.com/input/?i=sin%28x%29+%2B+sin%281.5x%29",
"http://www.wolframalpha.com/input/?i=sin... | |
2464fz | why do certain body parts feel numb while drunk? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2464fz/eli5_why_do_certain_body_parts_feel_numb_while/ | {
"a_id": [
"ch40wl7"
],
"score": [
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"text": [
"Alcohol is a depressant. It hinders the brain's ability to function properly and impedes neural messages from reaching the brain."
]
} | [] | [] | [
[]
] | ||
6rmp2c | How do we know that the Universe's law or constants never change? | If all we know is from comparing the universe against itself, how can we actually know that our various discoveries on how the universe operate can't ever change? It goes against human instinct for sure, but has science actually proven that the universe isn't able to change itself?
And since theories that the universe... | askscience | https://www.reddit.com/r/askscience/comments/6rmp2c/how_do_we_know_that_the_universes_law_or/ | {
"a_id": [
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"score": [
10,
9,
2,
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],
"text": [
"If all of physics changes all of the time then we really have no basis for any of the research that we do because anything could be caused by anything.\n\nHowever, we actually don... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Time-variation_of_fundamental_constants"
],
[],
[],
[
"https://arxiv.org/abs/1008.3907",
"https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.107.191101",
"http://www.usra.edu/news/pr/2017/fundamentalconstant/"
]
] | |
1pg80z | How was correspondence handled between Axis and Allied nations during World War II? | I read on Wikipedia that POWs in the prison were allowed correspondence with their families back home. I was wondered at what areas was mail transferred? Switzerland? Sweden? Been wondering this for awhile and love to hear more on this. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1pg80z/how_was_correspondence_handled_between_axis_and/ | {
"a_id": [
"cd206qx",
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"score": [
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5,
2
],
"text": [
"I know of at least a couple of instances where impartial charities handled mail. \n\nThe best one I can think of would be Helmuth Heye, captain of the Herman heavy cruiser Admiral Hipper, wrote to the B... | [] | [] | [
[],
[],
[]
] | |
2sfq6i | how does closing our eyes signal to the brain that it's time to shut down (sleep)? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2sfq6i/eli5_how_does_closing_our_eyes_signal_to_the/ | {
"a_id": [
"cnp1bpr"
],
"score": [
2
],
"text": [
"It's not necessarily so that closing your eyes makes you sleepy. Often it's the other way around: you feel and urge to close your eyes when you are tired and sleepy. Bu in a way it's like two sides to a coin - the two phenomena are interconnected... | [] | [] | [
[]
] | ||
2xkk5h | the railgun | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xkk5h/eli5_the_railgun/ | {
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"text": [
"There are a couple of different railgun designs, but essentially, a magnetic projectile (like a steel ball) is attracted by a big electromagnet. As the projectile arrives at the m... | [] | [] | [
[],
[],
[],
[
"http://www.wired.com/2014/08/the-physics-of-the-railgun/"
]
] | ||
58j0ht | Let's say that I'm riding with Edward Longshanks in 1282 to combat some Welshmen. Naturally, I'm not going to exchange pleasantries with them. Would it be more expected of me to use swear words based on bodily fluids and genitals or religious themed ones? Any good examples of appropriate curses? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/58j0ht/lets_say_that_im_riding_with_edward_longshanks_in/ | {
"a_id": [
"d90ykhu"
],
"score": [
11
],
"text": [
"The problem with the Middle Ages in England is that there is much less writing in English than there is in French or Latin. However, we do have the *Canterbury Tales* which is a fairly extensive corpus for Middle English words and also has the b... | [] | [] | [
[]
] | ||
20xpft | how can cosmetic and otc drug companies get away with putting out duplicate products with strikingly similar boxes without getting sued? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/20xpft/eli5_how_can_cosmetic_and_otc_drug_companies_get/ | {
"a_id": [
"cg7p810"
],
"score": [
2
],
"text": [
"The rules the FDA makes for drugs are highly complex, but the jist of it is that drug makers only have a certain period of time in which they can hold patents and protect their intellectual property before they effectively become public. Usually ... | [] | [] | [
[]
] | ||
behqos | Why did they need an algorithm to take a picture of the black hole and what did the algorithm even do? | askscience | https://www.reddit.com/r/askscience/comments/behqos/why_did_they_need_an_algorithm_to_take_a_picture/ | {
"a_id": [
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"score": [
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"text": [
"It is an image but not a picture.\n\nSee [this question from a few hours ago](_URL... | [] | [] | [
[
"https://www.reddit.com/r/askscience/comments/bee8ec/why_did_they_need_so_much_code_to_take_the_black/"
],
[],
[
"https://www.youtube.com/watch?v=UGL_OL3OrCE"
],
[],
[],
[],
[],
[
"https://i.imgur.com/bh24JaW.jpg",
"http://cmb.physics.wisc.edu/pub/tutorial/ElecSpec_Images/wavelen... | ||
3e2evb | how is thermal sensation measured/estimated? | You know, when you're watching the weather report, and the hot chick goes like "dude, it's 10 Cº, with a thermal sensation of 5 ºC"
How is that measured? People don't perceive temperature all the same, do they? So how is this possible? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3e2evb/eli5_how_is_thermal_sensation_measuredestimated/ | {
"a_id": [
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"text": [
"The feels like takes humidity and windspeed into effect, both testable factors. \n\nGenerally objects heat or cool in an inverse exponential fashion shown [here](_URL_0_). Having humidity or wind will increase or decrease the rate of cooling, but... | [] | [] | [
[
"http://forio.com/simulate/~~/2124059382/simulationThumbnail/image/asavitzky/test-excel-import.png?width=452&height=263&fitWidth=true"
]
] | |
rq063 | If other universes exist, is it possible that their laws of physics are different than ours? If so, how is this possible? | askscience | http://www.reddit.com/r/askscience/comments/rq063/if_other_universes_exist_is_it_possible_that/ | {
"a_id": [
"c47pcz6"
],
"score": [
4
],
"text": [
"Here is a wikipedia article you might find interesting.\n\n_URL_0_"
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Fine-tuned_Universe"
]
] | ||
487m9i | Why is DNA considered an acid when it has mostly negative charges from phosphate groups? shouldn't that make it a base? | askscience | https://www.reddit.com/r/askscience/comments/487m9i/why_is_dna_considered_an_acid_when_it_has_mostly/ | {
"a_id": [
"d0iomua"
],
"score": [
4
],
"text": [
"The \"acid\" part refers to the fact that it has a [phosphate group](_URL_0_), which can deprotonate - making it an acid, much like phosphoric acid. It does not refer to the form it takes under physiological conditions (that is, they're not split... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Phosphate"
]
] | ||
615u2k | is near term extinction really imminent? if so, what can we do as individuals to withstand it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/615u2k/eli5_is_near_term_extinction_really_imminent_if/ | {
"a_id": [
"dfbz1b0"
],
"score": [
2
],
"text": [
"Humanity is a highly intelligent, spread-out and resilient species. Untold millions may die and civilizations crumble, but outright extinction is highly unlikely unless we're talking about truly extraordinary calamities, of which \"just\" climate... | [] | [] | [
[]
] | ||
2qfq8p | why do swiss banks seem immune to all foreign legal obligations except for taxes? | Watching Wolf of Wall Street and all the other things I've read/heard, why are the Swiss banks immune to extradition? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2qfq8p/eli5_why_do_swiss_banks_seem_immune_to_all/ | {
"a_id": [
"cn5oh7y"
],
"score": [
3
],
"text": [
"Please do a search before you post. I did it for you this time because I'm nice:\n\n_URL_0_\n\nThey have softened their stance in recent years, however."
]
} | [] | [] | [
[
"http://www.reddit.com/r/explainlikeimfive/comments/1ecgsx/eli5_what_makes_swiss_bank_accounts_special/"
]
] | |
3uw7mv | this statement from the federal reserve | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3uw7mv/eli5this_statement_from_the_federal_reserve/ | {
"a_id": [
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"score": [
12,
5,
2
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"text": [
"We want to keep as many people employed as we can, without jacking with our prices. Right now it looks like we can do that. So far it looks like everything will be fine, but we're watching the global e... | [] | [] | [
[],
[],
[]
] | |
123ide | When I drink something with caffeine in it, how long does it affect my body? | I don't drink coffee but when I'm studying in the evening and start to get tired, I may grab a coke or something. My question is, how long does the caffeine affect my system? Also, I know caffeine that is consumed shortly before bed will make it hard to sleep but is there any other effects? As in, does it affect your b... | askscience | http://www.reddit.com/r/askscience/comments/123ide/when_i_drink_something_with_caffeine_in_it_how/ | {
"a_id": [
"c6rvh4a"
],
"score": [
2
],
"text": [
"There are a lot of variables that will affect how long caffeine will stay in your system; such as, whether you're a male or female, your weight, the actual amount of caffeine consumed, your current tolerance level, etc. There's simply no way to ... | [] | [] | [
[]
] | |
2g07f1 | why are people interested in tap-to-pay with cellphones? | I don't get it. What is so difficult with paying with cash or a card that people think something like Apple Pay is a big deal? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2g07f1/eli5_why_are_people_interested_in_taptopay_with/ | {
"a_id": [
"ckedasq",
"ckeee6k"
],
"score": [
5,
2
],
"text": [
"1 thing is more convenient to carry than 2 things. ",
"Laziness breeds innovation. Before all of these iDevices and such people had a wallet they carried around to pay for things. Then they had to carry a wallet AND wha... | [] | [] | [
[],
[]
] | |
1oqcgx | Does how my body is oriented while asleep(on my back/side/stomach) have any effect on my brain or body's circulation? | askscience | http://www.reddit.com/r/askscience/comments/1oqcgx/does_how_my_body_is_oriented_while_asleepon_my/ | {
"a_id": [
"ccuj95y"
],
"score": [
2
],
"text": [
"The majority of your blood while sleeping in a particular position would be pooled near the bed, meaning that the mileage closest to the ground would have more blood going through it, simply because of gravity. \n\nGravity has a pretty significan... | [] | [] | [
[]
] | ||
6yhuxc | who are these "experts" we always hear about in the news or in sources of information? ex:"experts say..." | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6yhuxc/eli5_who_are_these_experts_we_always_hear_about/ | {
"a_id": [
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"score": [
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2,
5,
2
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"text": [
"It depends on what the particular article is about. For example, if you're doing a story involving some computing concept, like a virus, you may ask some folks how viruses work, o... | [] | [] | [
[],
[],
[],
[]
] | ||
huwsk | Why does sticking your head in the freezer provide relief for your eyes when chopping onions? | askscience | http://www.reddit.com/r/askscience/comments/huwsk/why_does_sticking_your_head_in_the_freezer/ | {
"a_id": [
"c1ykeje"
],
"score": [
4
],
"text": [
"It's probably as simple as the fact that you're getting your face away from the onions."
]
} | [] | [] | [
[]
] | ||
1yr1te | why do i get emails on my phone before they come through to outlook on my computer? | I get the email notification on my phone, on LTE or 3G, several seconds before it pops up in Outlook, which is connected to the internet either by Wifi or a LAN connection.
Curious if this happens to others / what is the reason for it.
Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1yr1te/eli5_why_do_i_get_emails_on_my_phone_before_they/ | {
"a_id": [
"cfmzdkp"
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"score": [
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],
"text": [
"Without you giving more specifics about your mail server, it is probably because your phone is set to push, or to be immediately notified when mail arrives, while your desktop is set to pull, or to check on a timer or at certain time intervals fo... | [] | [] | [
[]
] | |
63o6np | what toxins do those cleanse diets and pills remove. | I've heard lots of different things online and from other people about how you should do cleanse diets to get rid of toxins in your body. Also it seems like tons of medicines and products claim to flush toxins from your body. Isn't that what your kidneys and liver do? If they're fake, how are they allowed to sell produ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/63o6np/eli5_what_toxins_do_those_cleanse_diets_and_pills/ | {
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"None. We have organs in our bodies, as you mentioned, to do the job for us. The cleanse diets/pills are just woo.",
"They are classed as supplements and have that little statement at the bottom. ... | [] | [] | [
[],
[],
[]
] | |
308r3h | why does food seem to taste different with different consistencies? | Like for example chicken drumsticks - i would never eat the skin when its partially fried, but if it's crispy it taste amazing. Also, even if the food actually tastes good, the consitency can ruin the pleasure if it's not right. Why is this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/308r3h/eli5_why_does_food_seem_to_taste_different_with/ | {
"a_id": [
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"text": [
"When you prepare and cook food, you are changing, removing, and creating new chemicals in the food. A piece of bread will have certain chemicals in it, but when it is toasted (via the Maillard reaction) you are changing the chemicals within the b... | [] | [] | [
[]
] | |
2kn4tv | why don't we ever learn about the 14 presidents before george washington? | I was only very recently told that 14 men served 1 year terms as president before George Washington became president with the ratification of the constitution. Why didn't I learn about this in school? Did I just miss that day, or do people deliberately not talk about this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2kn4tv/eli5why_dont_we_ever_learn_about_the_14/ | {
"a_id": [
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"None of them matter. Under the Articles of Confederation, the federal government only barely existed. Washington was the first President after the adoption of the Constitution, which means he was the first with any actual a... | [] | [] | [
[],
[]
] | |
2ikq0x | why can't tissue like meniscus that fails or tears be replaced with an artificial substance that works just as well? | It seems like I read weekly about tissue in the body that has been shown to be receptive to synthetic replacement (or regrowth) but not with regard to knee ligaments/cartilage? Why is that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ikq0x/eli5why_cant_tissue_like_meniscus_that_fails_or/ | {
"a_id": [
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"There are lots of materials we can use that the body will accept, and in some cases the material will even be able to encourage the body to heal faster or work in a way to help the intergration.\n\n > an artificial substance that works just as w... | [] | [] | [
[]
] | |
9bmmks | How/Why does Intel have a higher IPC than AMD at the same clock frequency in their CPUs? | askscience | https://www.reddit.com/r/askscience/comments/9bmmks/howwhy_does_intel_have_a_higher_ipc_than_amd_at/ | {
"a_id": [
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"The other answer in this thread is a bit simplistic, and not quite correct in some cases.\n\nFirst, let's look at where differences in IPC (instructions per cycle) can arise. In essence, all Intel and AMD CPUs are [Von Neumann](_URL_1_) machines,... | [] | [] | [
[
"https://www.amazon.com/Computer-Architecture-Quantitative-John-Hennessy/dp/012383872X",
"https://en.wikipedia.org/wiki/Von_Neumann_architecture"
]
] | ||
515l42 | Was there ever a 'Zionist'-type movement for African Americans? Did freed slaves ever think of building a new nation in Africa? | After the Holocaust, Jews across the world fled to Israel and founded a new nation (albeit on land that wasn't empty).
Was there ever (or is there, I suppose) a movement to do the same for African Americans? To return to Africa and build a new nation? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/515l42/was_there_ever_a_zionisttype_movement_for_african/ | {
"a_id": [
"d79t72g"
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"text": [
"Yes, the Back-to-Africa movement, also called Black Zionism, was such a movement that saw popularity in pre-civil war times, reconstruction, and a brief revival in the 1920s.\n\nIt started up in the 19th centuries, when many free blacks in both t... | [] | [] | [
[]
] | |
20f6ts | If silicon wafers can only be made round, why are the chips we make not hexagons instead of squares to cover the edges more efficient? | Hexagons, Octagons... whatever is more efficient to fill a circle than squares. | askscience | http://www.reddit.com/r/askscience/comments/20f6ts/if_silicon_wafers_can_only_be_made_round_why_are/ | {
"a_id": [
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"text": [
"It would be very hard to cut the wafer in pieces if the die is not rectangular [although laser cutting seems to be able to cut any shape](_URL_0_).\n\nAnyway, the arrangement of the logic gates on the die is mostly in a horizontal and/or vertical... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Wafer_dicing"
]
] | |
4tgs63 | How voltage travel in a wire at the fundamental level? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/4tgs63/how_voltage_travel_in_a_wire_at_the_fundamental/ | {
"a_id": [
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"text": [
"The electrons do move. It's just that a very small increase in the number of electrons causes a very large increase in the force, so there's negligible electric current before the system stabilizes.\n\nIt's sort of like [Pas... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Pascal%27s_law"
],
[]
] | |
barmnn | how are we able to send information through the air? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/barmnn/eli5_how_are_we_able_to_send_information_through/ | {
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"There are devices that encode and decode on either side of a transmitted signal. The encoder turns the signal in to a wave form, the decoder reassembles that wave form so the devic... | [] | [] | [
[],
[],
[],
[]
] | ||
32cgiv | why do hangnails hurt so much? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32cgiv/eli5_why_do_hangnails_hurt_so_much/ | {
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"score": [
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"text": [
"Here's a picture of a homunculus (a picture of the human body with each body part shrunk or expanded based o... | [] | [] | [
[
"http://workinghandsproject.com/images/demo/Homunculus.jpg"
],
[],
[],
[],
[],
[
"https://www.youtube.com/watch?v=AsZ5MbQgzv4"
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n832z | During the eclipse this morning I noticed the shadow moved from top to bottom. Shouldn't it be the other way around? | Seems the shadow cast by the earth would start from the bottom. What exactly was going on? | askscience | http://www.reddit.com/r/askscience/comments/n832z/during_the_eclipse_this_morning_i_noticed_the/ | {
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"text": [
"The shadow of the Earth on the Moon appears to move that way because the Moon is actually orbiting our planet in a direction completely opposite of its apparent movement in the sky (the rotation of our planet makes it look l... | [] | [] | [
[],
[]
] | |
2l4tbo | Are there any US presidents who had a bad life after presidency? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2l4tbo/are_there_any_us_presidents_who_had_a_bad_life/ | {
"a_id": [
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"text": [
"Harry Truman was poor before and after his presidency.\n\n\"One of the saddest cases of presidential hardship, Truman, was relatively poor throughout his life. He borrowed against his meager future inheritance and invested in a zinc mining operat... | [] | [] | [
[
"http://247wallst.com/investing/2010/05/25/americas-poorest-presidents-bankruptcy-insolvency-and-extreme-financial-hardship/3/"
]
] | ||
2iq6vk | why opening the task manager almost always seems to fix a non-responsive application | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2iq6vk/eli5_why_opening_the_task_manager_almost_always/ | {
"a_id": [
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"text": [
"Because starting the task manager is like an astronaut calling in and saying \"Houston, we have a problem\". You've got your computers attention, it's sort of a \"top level\" instruction, everything else the pc is doing is frozen, and you get the... | [] | [] | [
[]
] | ||
1j7xz9 | What is the general timeline of the evolution of English monarchic power from absolute to Queen Elizabeth II being a tourist attraction? | At what point could the English King/Queen no longer rule by decree? And what was their last significant independent power (that is, more power than just providing Royal Ascent to every piece of legislation and picking an MP to form a government)? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1j7xz9/what_is_the_general_timeline_of_the_evolution_of/ | {
"a_id": [
"cbc91q9"
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"text": [
"As [I've written before](_URL_1_), there's no single point. It was a series of events, over hundreds of years.\n\n* The first loss of power was the signing of the Magna Carta, by King John. While his brother Richard was off fighting the Crusades,... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Bill_of_Rights_1689",
"http://www.reddit.com/r/AskHistorians/comments/r7ls0/at_what_point_did_the_british_monarchy_lose_power/c43k95r"
]
] | |
1dr7dn | where did the star shape originate? | Stars dont really look like the 5 pointed stars we use today. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1dr7dn/where_did_the_star_shape_originate/ | {
"a_id": [
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"It originates far back when we did not have telescopes or anything to see the stars with. When you look at the star, it really looks like the 5 pointy thing we know it as, because of the light beams.\n\nMore info: _URL_0_"
]
} | [] | [] | [
[
"http://www.ehow.com/about_5125294_pointed-star-symbolize.html"
]
] | |
zc35m | Is mutation inevitable among living things? | I did some research whether evolution is unavoidable and found some answers:
Evolution will occur in any system where there is:
1) entities that replicates
2) variation in replicated copies
3) any effects that makes some variants reproduce more or less frequently than others
It makes perfect sense, but it also means ... | askscience | http://www.reddit.com/r/askscience/comments/zc35m/is_mutation_inevitable_among_living_things/ | {
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"text": [
"I think the answer is yes. As others pointed out, you can reduce it to extremely low values if you're ready to expend more and more effort to do so, but the mutation rate can never... | [] | [] | [
[],
[],
[],
[]
] | |
37l0j7 | Why did Romans use amphoras instead of barrels? | Amphoras are more prone to breaking than barrels. If you're transporting them in a ship, barrels seem to use the limited amount space more efficiently. A broken amphora is useless, a broken barrel can be repaired or its parts could be used to create a new barrel. And finally, [ship crews could break down barrels](_URL_... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37l0j7/why_did_romans_use_amphoras_instead_of_barrels/ | {
"a_id": [
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13,
2
],
"text": [
"Have a look at [this](_URL_0_) thread. It's not exactly the same question, but I think some of the answers are relevant to yours.",
"There is a certain aspect of path dependence here. Barrels and a... | [] | [
"http://www.reddit.com/r/AskHistorians/comments/2szut7/when_i_think_of_roman_liquid_storage_i_think_of/cnux3tl"
] | [
[
"https://www.reddit.com/r/AskHistorians/comments/2szut7/when_i_think_of_roman_liquid_storage_i_think_of/"
],
[],
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] | |
3a5mor | Why can we see Mercury and Venus in the sky if they are within our orbit? | I don't understand why we can see Mercury and Venus if their orbits are inside of our own? Surely we are looking out of our solar system thus couldn't see them unless during the day but then the sun would make it to bright to observe.
Assuming it has something to do with refraction/geometry. | askscience | http://www.reddit.com/r/askscience/comments/3a5mor/why_can_we_see_mercury_and_venus_in_the_sky_if/ | {
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"The answer does have to do with geometry.\n\nConsider the following arrangement:\n\n Sun Venus\n\n\n\n XXX\n XXXXX\n EARTH\n XXX\n\nImagine you l... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Elongation_%28astronomy%29"
],
[]
] | |
1mpe0l | Did French nobility flee to Jamaica during the Revolution? | It is legend in my family that we're descended from the French Commander of the Navy (I can't find the title), who fled to Jamaica with his family near the start of the French Revolution.
Was this common/known for the upper classes at that time? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1mpe0l/did_french_nobility_flee_to_jamaica_during_the/ | {
"a_id": [
"ccbeohf"
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"text": [
"That's entirely possible. [A lot of _émigré_ aristocrats](_URL_1_) fled to London or other parts of the British empire, so it's equally possible some made their way to Jamaica. The planter class in Saint-Domingue, Martinique, and Guadeloupe wer... | [] | [] | [
[
"http://books.google.fr/books?id=PfqSkQEACAAJ&dq=emigres+french+revolution&hl=en&sa=X&ei=137SUZj1KeiM7QbUhoCQCg&redir_esc=y",
"http://www.reddit.com/r/AskHistorians/comments/1hg62k/how_many_of_the_french_aristocrats_who_fled_to/caud6tc",
"http://books.google.fr/books?id=NIOmQgAACAA... | |
84piyk | What led the US to allow a conditional surrender of Japan after demanding unconditional surrender at the Potsdam Conference? | I have been studying this in History in school, and there seems to be a few pieces missing out the puzzle. Here's what I (thinkknow:
1. After VE Day, Potsdam conference is organized to figure out what the postwar world would look like, and how to defeat Japan. An unconditional surrender is demanded of Japan.
2. Previ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/84piyk/what_led_the_us_to_allow_a_conditional_surrender/ | {
"a_id": [
"dvry1zf"
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"text": [
"I'm not sure where you're getting the idea that Japan was allowed to surrender conditionally. They weren't. They accepted unconditional surrender... as for why much of the Japanese government was bureacratic mechanisms (and the Emperor) were all... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/5i4fic/in_japan_there_are_nationalists_who_openly_deny/"
]
] | |
2iz4ir | Finding Newspaper Sources | I was wondering if one of you could give advice on the best way to find newspaper sources for events when they don't come up from a google search
Thanks | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2iz4ir/finding_newspaper_sources/ | {
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"Libraries usually offer access to newspaper archives which you can search. Often this requires a login of some type if used online, or physical presence at the library.\n\nThese archives usually aren't publicly available sin... | [] | [] | [
[],
[
"http://webpages.uidaho.edu/special-collections/Other.Repositories.html",
"http://ufdc.ufl.edu/hnccoll"
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] | |
2mangk | how come junk food tastes so good? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2mangk/eli5_how_come_junk_food_tastes_so_good/ | {
"a_id": [
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"text": [
"High fat, sugar, and sodium content activates dopamine receptors in the brain that promote stimulation which creates the sensation of happiness and satisfaction. This effect is almost immediate, but certainly not lasting. "
]
} | [] | [] | [
[]
] | ||
1br30o | Why can't they make the "perfect computer language?" A language that is higher level language that has a super intelligent compiler to create efficient machine code from that level? | I have programmed in almost every language. Most of the time I will use Python or Perl to program because I can get things done quickly with them. Unfortunately, for some tasks, C is over 100 times faster than those languages. Unfortunately, it would also take me 10 times as long to create programs using C.
Why ca... | askscience | http://www.reddit.com/r/askscience/comments/1br30o/why_cant_they_make_the_perfect_computer_language/ | {
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"text": [
"Because computation is nontrivial.\n\nThe idealization of computation... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Computational_complexity",
"http://en.wikipedia.org/wiki/Lambda_calculus",
"http://en.wikipedia.org/wiki/P_%3D_NP",
"http://en.wikipedia.org/wiki/Halting_problem",
"http://en.wikipedia.org/wiki/Kolmogorov_complexity",
"http://en.wikipedia.org/wiki/Lambda_calcu... | |
13egni | Are onions toxic to all dogs? I just read a thread in r/dogs about a dog dying a (horrific) death from eating 3oz of onions, but I've fed onions to all of my dogs, (golden and two shih tzus) who all lived to at least 15 years. What's the difference? | askscience | http://www.reddit.com/r/askscience/comments/13egni/are_onions_toxic_to_all_dogs_i_just_read_a_thread/ | {
"a_id": [
"c7382x5"
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"score": [
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"text": [
"sure, but did your dogs eat 3oz of onions at once? Dosage is probably an important factor."
]
} | [] | [] | [
[]
] | ||
1thgnk | i've read when you hit the water after jumping off of a bridge it's the same as concrete, why isn't rain the same as having gravel dropped on you from miles in the air? | I'm sure most of you have read that when you jump off a high bridge you die instantly on impact because the water is basically as hard as concrete when you're going that fast, why isn't rain basically the same as little rocks when it falls? Seems like it's the same deal just in reverse. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1thgnk/eli5_ive_read_when_you_hit_the_water_after/ | {
"a_id": [
"ce7zplt"
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"score": [
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"text": [
"according to sources, terminal velocity of raindrops is about 10m/s, for human body it's 50m/s or so."
]
} | [] | [] | [
[]
] | |
2c37os | - what is the difference between the usa supporting "contras" and "mujahideen" and moscow supporting ukrainian separatists? | Serious question. Serious replies welcomed. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2c37os/eli5_what_is_the_difference_between_the_usa/ | {
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"text": [
"There are a few gray areas here, but the way I see the differences (and I feel they're minor) are:\n\n* Are the Ukrainian Separatists a... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
wh77r | Why did lager become so prevalent in the United States? | Didn't know if I should this here or r/beer. Can anyone explain when and why the American style lager beer (e.g., Budweiser or Coors) became the standard beer in North America? Why did people stop drinking ale? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/wh77r/why_did_lager_become_so_prevalent_in_the_united/ | {
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35,
12,
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"text": [
"I imagine in the hotter areas it is because the heavier and more alcoholic ale is no where near as refreshing. That is just speculatio... | [] | [] | [
[],
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[],
[],
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ahv5ku | If an English medieval king wants something built who is the first person he would go to for help? | I know a king has a lot of servants/people under him that each serve a different purposes such as a steward, standard bearer, a master of the hunt, etc. But if a king decides he wants to build a monument, or a tower, or something, who would he approach to get the job done? Essentially what would be considered the medie... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ahv5ku/if_an_english_medieval_king_wants_something_built/ | {
"a_id": [
"eeig8gi"
],
"score": [
4
],
"text": [
"This is a pretty interesting question. The first person an English king would probably talk to would be someone from Parliament. English Kings were still under the Magna Carta for a good portion of the Medieval Ages. The King would need to get th... | [] | [] | [
[]
] | |
5b7rd0 | how can someone survive with just 1/4 of a liver in the case of a transplant? | I heard that you can get a liver transplant with as little as 1/4 of a liver and it will eventually grow to full size. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5b7rd0/eli5_how_can_someone_survive_with_just_14_of_a/ | {
"a_id": [
"d9mfddo"
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"score": [
2
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"text": [
"Simple answer is that the liver regenerates slowly over time. As long as you don't stress it out you could live a fairly healthy life, while you wait for it to grow back. If you ever did you would only be able to drink water and would have to mon... | [] | [] | [
[]
] | |
8z961z | how does micellar water work? | I know it has something called "micelles", hence the name, but that's about it. Its a product I use every day and would like to know how it works | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8z961z/eli5_how_does_micellar_water_work/ | {
"a_id": [
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"text": [
"What does it do and how do you use it? I always see it in pharmacies and supermarkets",
"So imagine a molecule. One end likes water. One end likes oil. Oil and water don't like touching each other s... | [] | [] | [
[],
[],
[]
] | |
57bjjq | Western films often purport a stark difference between Southwestern "village Indians" like the Pueblo and Yuma, and "warrior Indians" like the Apache and Comanche. Were these cultures really so distinct in lifestyle? | Movies like The Man from Laramie regularly depict Pueblo peoples as entirely pacifistic farmers who live in Western-style villages and tend to be Catholic. By contrast, Apache and Comanche are depicted as ruthless nomads with no livelihood except violence.
In the 18th and 19th centuries, were settled Southwestern peop... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/57bjjq/western_films_often_purport_a_stark_difference/ | {
"a_id": [
"d8rhbu2"
],
"score": [
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],
"text": [
"Your assertion that this idea is much more complicated than Hollywood portrays is absolutely correct. This idea of Navajos, Comanches, Apaches, etc. as especially violent comes out of the Indian Wars fought by the U.S. Military against these gr... | [] | [] | [
[]
] | |
yzdrj | iran vs israel | I'm looking for a non-biased simple explanation of why they seem to hate each other. Thank you :) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/yzdrj/eli5_iran_vs_israel/ | {
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"Back in the early part of the 20th century there was the Zionist movement. This was the idea that the Jews needed a country to call their own. One of the most popular ideas was to create this in the biblical region of Judea,... | [] | [] | [
[],
[]
] | |
6kkzbh | why do human bodies build up tolerance to alcohol/drugs but not daily medications like antidepressants/cardiac/etc meds? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6kkzbh/eli5_why_do_human_bodies_build_up_tolerance_to/ | {
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"I can't speak for the other meds, but you absolutely can build up a tolerance to antidepressants and painkillers and the like"
]
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arla7v | Would a Roman from the 1st-2nd century AD recognize anything in the Eastern Roman Empire (Byzantine) in the 11th-12th century as "Roman"? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/arla7v/would_a_roman_from_the_1st2nd_century_ad/ | {
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"In religion, language, and many other respects, the Byzantine Empire of the Comnenian period was very different from its Roman ancestor. It continued, however, to preserve many of the cultural traditions, some of the institutions, and one of t... | [] | [] | [
[]
] | ||
9fxd69 | what is the psychology behind humans wanting rare/exclusive things so badly? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9fxd69/eli5_what_is_the_psychology_behind_humans_wanting/ | {
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218slc | What was Spain's relationship with Northern Africa in the late 15th and early 16th centuries? | What was Spain's relationship with Northern Africa in the late 15th and early 16th centuries?
I know they had some influence in Tunis at some point. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/218slc/what_was_spains_relationship_with_northern_africa/ | {
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"Spain as we understand it now only really comes into existence in 1472 with the marriage of Ferdinand of Aragon and Isabelle of Castille, and the union of those two kingdoms. \n\nThe kingdom of Aragon under Ferdinand not only controlled the medit... | [] | [] | [
[
"http://books.google.com/books?id=xzfI6Hbv6AQC&printsec=frontcover&dq=Empire+of+the+sea&hl=en&sa=X&ei=jBMxU_HRE4aikQfXw4HoDQ&ved=0CDgQ6AEwAA#v=onepage&q&f=false",
"http://en.wikipedia.org/wiki/Kingdom_of_Naples"
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13ecqs | [Neurology] Layman wants to know: Why do games like Portal give me motion sickness? And why doesn't this affect everyone? | In addition to Portal, there are Unity-based games [like this one](_URL_0_) where WASD moves you laterally and the mouse turns you and looks around.
I cannot play these games for more than a few minutes before I start to feel miserable: dizzy and nauseated. It takes me a long time to recover after I stop playing.
Wha... | askscience | http://www.reddit.com/r/askscience/comments/13ecqs/neurology_layman_wants_to_know_why_do_games_like/ | {
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"Just a friendly reminder, please keep the discussion to the scientific phenomenon of motion sickness and avoid sharing your personal anecdote.\n\nThanks!",
" > Simulation sickness, or simulator sickness, is a condition ... | [] | [
"http://jayisgames.com/archives/2012/11/imscared_-_a_pixelated_nightmare.php"
] | [
[],
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"http://en.wikipedia.org/wiki/Motion_sickness#Simulation_sickness"
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hxrps | Why does an electron emit or absorb energy when it goes up or down a level? | Furthermore what does it mean for an electron do go down or up a level? Where does that energy come from? Can an electron always emit energy or is there a level cap, or vice-versa can it absorb an infinite amount of energy or it reaches a certain level when it can't absorb anymore? | askscience | http://www.reddit.com/r/askscience/comments/hxrps/why_does_an_electron_emit_or_absorb_energy_when/ | {
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" > Why does an electron emit or absorb energy when it goes up or down a level?\n\nConservation of energy. An electron (bound within an atom) goes up a level when it absorbs a photon. So imagine the electron has an energy of 10 (in some unit) be... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Ground_state"
]
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836gvm | When taking human body temperature, is there a location/method that gets closest to one's "real" temperature ("real" for medical purposes, i.e. identifying fever or other issues)? | My experience has been that oral temperatures are about .5-1 degree cooler than rectal temps. I know that temps can be measured in the armpit, ear, vaginal canal, and forehead. Which one is considered "real" or relevant for medicine? Or does it not matter that much? | askscience | https://www.reddit.com/r/askscience/comments/836gvm/when_taking_human_body_temperature_is_there_a/ | {
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"They are all real as long as you understand how they all differ from the core body temperature.\n\nRectal, ear, and temporal artery temperatures are closest to core body temperature but more importantly they are less likely to be affected by envi... | [] | [] | [
[]
] | |
ygso8 | why is north considered up? is there any practical reason why north won the right to point towards the top of the page and not the south? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ygso8/eli5_why_is_north_considered_up_is_there_any/ | {
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"North is a direction, before maps there was no up, just four directions, we just happene... | [] | [] | [
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"http://en.wikipedia.org/wiki/Pole_Star",
"http://en.wikipedia.org/wiki/%CE%92_Ursae_Minoris",
"http:/... | ||
9r9f8n | does sound get louder when multiplied? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9r9f8n/eli5_does_sound_get_louder_when_multiplied/ | {
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"Sound waves carry energy that physically makes the air particles (or any medium that it travels through) viabrate as the sound moves. If you have more things making noise the total amount of particles viabrateing in the air is a lot more thus a l... | [] | [] | [
[]
] | ||
146gfq | If I were to condense an entire 20" pizza to the size of a penny and ate it, would I feel full? | askscience | http://www.reddit.com/r/askscience/comments/146gfq/if_i_were_to_condense_an_entire_20_pizza_to_the/ | {
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"The enzymes in your stomach will have a rather difficult time breaking down something that is 20 times higher in density than what they are used to. It might very well be discarded as waste, like an actual penny."
]
} | [] | [] | [
[]
] | ||
a3p1gl | In light of Pearl Harbor Day tomorrow, to what extent was Japanese internment in America a land-grab by white farmers? | I realize this was [asked before](_URL_0_), but it remains unanswered. Like the original poster, I first encountered the idea through [this post](_URL_2_) ([single page version](_URL_1_)) by Dr. Sarah Taber. Relevant quote here:
> The Central Valley used to be peppered with Japanese family farms. Not anymore. What h... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a3p1gl/in_light_of_pearl_harbor_day_tomorrow_to_what/ | {
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"The simple answer is yes and no. While those who would economically benefit from internment were not silent about their support for the policy, it would likely be more accurate to say internment was the result of widespread Japanese prejudice ra... | [] | [
"https://www.reddit.com/r/AskHistorians/comments/89fyf8/how_accurate_is_this_post_on_japanese_internment/",
"https://threadreaderapp.com/thread/954774752970801152.html",
"https://twitter.com/SarahTaber_bww/status/954774752970801152"
] | [
[]
] | |
6dumq9 | how is the pattern on a key chosen? and how are they all different so that two keys cannot open the same door? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6dumq9/eli5_how_is_the_pattern_on_a_key_chosen_and_how/ | {
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"A lock is made up of pins. Each needs to be lifted a certain height to allow the lock to open.\n\nNow let's say that height is set to a digit so there are 10 unique possible heig... | [] | [] | [
[],
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6ki81y | - why do some plants, tomatoes for example, almost immediately droop when transplanted? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ki81y/eli5_why_do_some_plants_tomatoes_for_example/ | {
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g43hg | What does an electron "absorbing" a photon actually mean? | When an electron "absorbs" this packet of energy, what is the actual mechanism that increases the energy of the electron, or atom, or electron cloud? Does the momentum increase by a quantized amount until the electron rockets to a new orbital? Does the psi-wave intensity increase to a point that it can't mathematically... | askscience | http://www.reddit.com/r/askscience/comments/g43hg/what_does_an_electron_absorbing_a_photon_actually/ | {
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"Quantum field theory literally says that you destroy the old electron and photon and create a new electron in a state that conserves energy, momentum, etc. This process takes no time. An equivalent desc... | [] | [] | [
[],
[],
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] | |
388riw | Spectrum of an antimatter star? | This question is largely theoretical, but here goes:
Say you have two similar stars in all respects except one is made of anti-matter (75% anti-H and 25% anti-He) and the other is made of matter (75% H and 25% He). Would they both give off the same characteristic spectrum (given we had the instruments to detect the an... | askscience | http://www.reddit.com/r/askscience/comments/388riw/spectrum_of_an_antimatter_star/ | {
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"The measured spectral lines would be the same in both cases.",
"Theoretically, yes, but we're only recently beginning to be able to test this via [measurement](_URL_0_). (Gotta' love that whole measurement thing.)"
... | [] | [] | [
[],
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"http://newscenter.lbl.gov/2012/03/07/measure-antiatom/"
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6bxuga | Regarding Robert E. Lee during Reconstruction | Recently, I got into a discussion with a friend who asserted that Robert E. Lee, later in his life, was a progressive figure who worked to shift the South away from it's roots in slavery. In particular, he used this quote:
> "So far from engaging in a war to perpetuate slavery, I am rejoiced that slavery is abolish... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6bxuga/regarding_robert_e_lee_during_reconstruction/ | {
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"While I cannot offer much on Lee himself, many Virginians were not enthusiastic supporters of slavery. Like nearly all Americans they believed society either should or naturally would be divided based on race, but the institution of slavery itsel... | [] | [] | [
[]
] | |
4epbte | why are so few low-wage service sector workers unionized in the u.s.? | There are clearly many workers who are dissatisfied with pay and working conditions in the low-wage service sector. What is keeping workers at companies like Walmart, McDonald's, Starbucks, Subway, etc. from forming unions? Do they not want to unionize? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4epbte/eli5_why_are_so_few_lowwage_service_sector/ | {
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"Unionization works when the workers have the threat of going on strike. And that's only a threat if they are hard to replace. \n\nIf a fast food restaurants ... | [] | [] | [
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1mx3pi | why do music artists usually have 1-2 "singles" per album? why don't they just make 10 singles | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1mx3pi/eli5_why_do_music_artists_usually_have_12_singles/ | {
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"Because you'd start ignoring them if they released too many singles. They release a couple leading up to the album with the hope that it will entice you into ... | [] | [] | [
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2d80ll | I am looking for a comprehensive source of African folklore/legends/myths what have you. Can anyone point me in the direction of one or several books? | I realize this question might not be totally kosher since i'm not asking for any information to be spelled out here, merely asking for where to find it myself. But i can think of no better place to ask.
Thanks in advance. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2d80ll/i_am_looking_for_a_comprehensive_source_of/ | {
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"The African continent is huge and complex, so works of synthesis are necessarily superficial. There are several works by Harold Courlander and by Jan Knappert that might of use to them. Search for titles by these authors, and you may find somethi... | [] | [] | [
[]
] | |
5nzt92 | Has anyone ever determined how Hermann Göring was able to commit suicide before his execution? | From various texts and films I've read and seen, it was a mystery as to how Göring was able to get the potassium cyanide pill that he took his own life the night before his scheduled execution.
Has history ever been able to determine who provided Göring with the cyanide pill? Surely he could not have brought it in hi... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5nzt92/has_anyone_ever_determined_how_hermann_göring_was/ | {
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fjoeni | Book recommendations for history of interwar Europe | I'm interested in learning more about interwar Europe (WW1-WW2) are there any good books that are recommended? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/fjoeni/book_recommendations_for_history_of_interwar/ | {
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"- Stalin Volume 1 Paradox of Power 1878-1928 \n\n- Stalin Volume 2 Waiting for Hitler 1928-1941\n\nThe cover it from the Russian side in quite a bit of detail and contain some original research on the pact and its practice\n\n- The Deluge: The Gr... | [] | [] | [
[]
] | |
cs5li6 | what is the use of the brush-like thing on the side of the escalators that we use to "clean shoes" ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cs5li6/eli5_what_is_the_use_of_the_brushlike_thing_on/ | {
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} | [] | [] | [
[]
] | ||
767cz5 | why states don't have perfect borders? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/767cz5/eli5_why_states_dont_have_perfect_borders/ | {
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2c87q4 | Why are there so few large flying animals today? | In the late cretacious period there was a [flying reptile](_URL_0_) with a twelve meter wingspan, with some estimates putting it far higher than that. Looking at todays birds, the biggest is a [vulture](_URL_1_) with wingspan of 1.2 meters.
What happened? has being that big just become useless from a survival aspect? ... | askscience | http://www.reddit.com/r/askscience/comments/2c87q4/why_are_there_so_few_large_flying_animals_today/ | {
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6gy8j3 | why do we have to restart our pc after uninstalling an app? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6gy8j3/eli5_why_do_we_have_to_restart_our_pc_after/ | {
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"In my experience, only the OS itself applies to this statement, meaning updates etc.\n\nAny other program I've used asked me to rest... | [] | [] | [
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"https://www.reddit.com/r/explainlikeimfive/comments/2r8w1w/eli5_when_you_inst... | ||
qszqp | HIV vaccine: how viable would it be to create one using FIV? | Feline Immune Deficiency virus. it's the cat version, it exists because cats are also an African species, and have had the virus for probably thousands of years. I recently read an article about how certain HIV drugs have had effects on FIV. i also read that humans are immune to HIV infection. I know that there have be... | askscience | http://www.reddit.com/r/askscience/comments/qszqp/hiv_vaccine_how_viable_would_it_be_to_create_one/ | {
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"It's not particularly viable, and there are a few reasons why. \n\nFirst, is something we call \"tropism,\" that is, what types of cells viruses can infect. Viruses don't just push themselves into any old cell, they have receptors that have evolv... | [] | [] | [
[]
] | |
2k17cm | Is there a temperature where water will never freeze or evaporate? | To expand on that, say you had a ring of water left over on a table after a cup was sitting there for a period of time. In any 'normal' condition the water will evaporate off the table, and if it were especially cold it would freeze. Is there a situation where the water will remain in liquid state indefinitely due to i... | askscience | http://www.reddit.com/r/askscience/comments/2k17cm/is_there_a_temperature_where_water_will_never/ | {
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"Take an enclosed volume at 100% relative humidity, apply higher pressure and cool the air and the puddle would conceivably never evaporate. In fact, under those conditions additional condensation would form as the water vapor is 'squeezed out ... | [] | [] | [
[]
] | |
1ee560 | AskScience AMA: We are the authors of a recent paper on genetic genealogy and relatedness among the people of Europe. Ask us anything about our paper! | **Message from Graham and Peter: Thanks everyone for all of your great questions. We'll answer some of the pending questions, as of 1pm PT May 16th, but won't be answering new ones. Thanks!**
We are the authors, Peter Ralph (/u/petrelharp) and Graham Coop
(/u/grahamcoop), of a recent paper on
[The Geography of Recent... | askscience | http://www.reddit.com/r/askscience/comments/1ee560/askscience_ama_we_are_the_authors_of_a_recent/ | {
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"http://phenomena.nationalgeographic.com/2013/05/07/charlemagnes-dna-and-our-universal-royalty/",
"http://www.nature.com/news/most-europeans-share-recent-ancestors-1.12950",
"http://gcbias.org/european-genealogy-faq/",
"http:/... | [
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[]
] | |
33ns1s | what ever happened to kony, and the #stopkony2012 movement? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/33ns1s/eli5_what_ever_happened_to_kony_and_the/ | {
"a_id": [
"cqmnq7d",
"cqmnxsq",
"cqmp79h"
],
"score": [
11,
5,
2
],
"text": [
"The filmmaker took some drugs then took his clothes off then took a stroll down a public street and got arrested.",
"Joseph Kony was already pushed out of Uganda long before the film was made, so ... | [] | [] | [
[],
[],
[]
] | ||
2mfzoa | why is the ending of a tv show or movie suspenseful even if i know the ending? | I was watching an episode of [Criminal Minds](_URL_0_) and I found myself wanting to yell "OH MY GOSH COME ON GO FASTER SHE'S ABOUT TO DIE" and getting all worked up, even though I know exactly how it ends. Why is that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2mfzoa/eli5_why_is_the_ending_of_a_tv_show_or_movie/ | {
"a_id": [
"cm3uyfd"
],
"score": [
3
],
"text": [
"Good shows, movies, books, etc, craft themselves in such a way that the spectator becomes emotionally invested in the characters. This is why conclusions to such things end up being rather satisfying, or perhaps disappointing, depending on what y... | [] | [
"http://en.wikipedia.org/wiki/Criminal_Minds"
] | [
[]
] | |
1363q2 | Where did modern military structure come from? | It appears as if all armed forces have the same organization. All generals have similar uniforms. There is the same line of succession. Where did it come from? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1363q2/where_did_modern_military_structure_come_from/ | {
"a_id": [
"c7151p8"
],
"score": [
12
],
"text": [
"This is a *very* complex question. I'll try to cut down to the bare basics of your question - why it's all so similar.\n\nModern military traditions can be traced back to the \"early modern period\", also known as the renaissance in Europe. At t... | [] | [] | [
[]
] | |
pwkkz | How efficient is respiration? | Edit I should clarify: how efficient is *cellular* respiration?
If I remember correctly, 1 glucose yields ~38 or so ATP when everything runs smoothly.
So what brings about my question is that my botany teacher told us that this was a very efficient process but also told us that according to the 2nd law of thermodyna... | askscience | http://www.reddit.com/r/askscience/comments/pwkkz/how_efficient_is_respiration/ | {
"a_id": [
"c3stah7"
],
"score": [
2
],
"text": [
"_URL_1_ \n_URL_0_\n\nThe 2nd law of thermodynamics does guarantee energy loss, but the number is wrong. It's about a 60% loss (meaning 4 times as much energy is recovered as your teacher claimed). Of course more energy will be lost when the AT... | [] | [] | [
[
"http://www.cbu.edu/~seisen/AerobicRespiration.htm",
"http://science.jrank.org/pages/5826/Respiration-Efficiency-cellular-respiration.html"
]
] | |
24cq4s | What is the earliest example of someone researching a potential trip to the moon? | I'm thinking along the lines of giant ladders, or human cannons, or adapted hot-air balloons (because my mind infers this question solely in terms of Warner Bros cartoons), but in all seriousness, It might seem like the sort of thing that a curious king or Victorian millionaire eccentric would task someone with researc... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/24cq4s/what_is_the_earliest_example_of_someone/ | {
"a_id": [
"ch5xpzr"
],
"score": [
8
],
"text": [
"Cyrano de Bergerac was probably the first to describe in detail the theoretical science needed to build a rocket to the moon in his book \"Les états et empires de la lune\" (The States and Empires of the Moon) of 1657.\n\nUnfortunately, despite t... | [] | [] | [
[
"http://upload.wikimedia.org/wikipedia/commons/c/ca/Cyrano_Sonne.jpg"
]
] | |
dzh7f5 | How hygenic were prostitutes of 19th century London? | Was reading about Jack the Ripper and his victims, and I began to wonder considering how unhygenic of a time Victorian London was. What I'm interested in specifically is how hygenic was prostitution, were there many STDs that went around etc?... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/dzh7f5/how_hygenic_were_prostitutes_of_19th_century/ | {
"a_id": [
"f8bqt3d"
],
"score": [
6
],
"text": [
"###Firstly: what do we mean by prostitutes?\n\nSome 19th century writers use the word in an expansive sense -- a prostitute could be any woman who had any sort of sexual contact outside of lawful marriage, any mistress of a wealthy man whether fi... | [] | [] | [
[]
] | |
fd0bbu | difference between apy and apr? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fd0bbu/eli5_difference_between_apy_and_apr/ | {
"a_id": [
"fje5iqg",
"fje6ecn"
],
"score": [
12,
7
],
"text": [
"So say you have a 12% interest rate per year.\n\nOn the surface, that would seem to indicate that if you owed $1000, you would be charged 12% or $120 per year because of interest.\n\nBut generally, that 12% per year is spli... | [] | [] | [
[],
[]
] | ||
139g9a | Why does soft plastic packaging leak when thawed? | What say a package made of soft plastic containing for example frozen chicken thaws it always seems to leak. Is this simply because it's a poor quality plastic, or does the thawing process do something to the material? | askscience | http://www.reddit.com/r/askscience/comments/139g9a/why_does_soft_plastic_packaging_leak_when_thawed/ | {
"a_id": [
"c720niz"
],
"score": [
6
],
"text": [
"Are you sure it is not water condensing on a cold surface or a layer of ice on the surface melting?"
]
} | [] | [] | [
[]
] |
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