q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
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values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
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6pbeor | what do cows have in their body/diet that produces "magic" mushrooms from their waste? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6pbeor/eli5_what_do_cows_have_in_their_bodydiet_that/ | {
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"It has literally nothing to do with cows. Cow poop is just fertilizer. Magic mushrooms are a species of mushroom. Only specific species of mushroom produce the chemicals known as psilocybin and psilocin. Which are responsibl... | [] | [] | [
[],
[]
] | ||
38zbed | cogito ergo sum | "I think, therefore i exist"
I am sure I do not fully understand the phrase. Can someone explain? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/38zbed/eli5_cogito_ergo_sum/ | {
"a_id": [
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"score": [
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"text": [
"If you are able to question whether you physically exist, then you do. If you didn't really exist, you couldn't be able to question your existence.",
"Existence is a fickle bitch. If you can't see, hear taste, or touch s... | [] | [] | [
[],
[]
] | |
50ulum | For hundreds of years, lands stretching from Algeria to Bengal were under the rule of Turks. If Turks dominated for so long, why are Turkic languages, outside of Central Asia, limited to Anatolia and Azerbaijan? | What about those places made the people there adopt Turkic languages as opposed to, say, Syria which was also under Turkish rule | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/50ulum/for_hundreds_of_years_lands_stretching_from/ | {
"a_id": [
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"For most of history, Turkic languages were not looked upon as prestigious or worthwhile. Most (perhaps all, though there may be exceptions) of the states of Turkic origin in the eastern half of the Muslim world used Persian... | [] | [] | [
[],
[]
] | |
3tt6xt | how does reading help you write better? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3tt6xt/elif_how_does_reading_help_you_write_better/ | {
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"AS a person whos English is second language, reading anything in English, increases my knowledge of language. I learn new words, new sentence structures. And in general how to write like an adult without using, lol, lmao, et... | [] | [] | [
[],
[]
] | ||
1s2u6j | how bad was body odor back in the day? roman times, ancient china, colonial americas, medieval europe, egypt, etc. if we truly could time travel, would the funky bo be a deal breaker for some ages? | Just how intense was body odor back in the day. I know this is gonna be a broad question with many variables at times, but I get the feeling that there's a general rule of thumb for each era. I've been told that many Ancient Romans bathed, along with the Chinese and Japanese. However, I've also been told that medie... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s2u6j/eli5_how_bad_was_body_odor_back_in_the_day_roman/ | {
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"http:... | |
2ec0q4 | hydrogen peroxide for first aid. how does it work and what is the mechanism of action? | Why do we use peroxide and what exactly does it do? How does it work? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ec0q4/eli5_hydrogen_peroxide_for_first_aid_how_does_it/ | {
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"text": [
"Hydrogen Peroxide (H2O2) decomposes into oxygen and water, creating highly reactive **free radical oxygen** species (Oxygen with an unpaired electron) in th... | [] | [] | [
[],
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3hrapg | why are things that humans make considered artificial, and not natural? for example, a beaver builds a dam, and its considered natural. humans make food with materials that they made from natural resources but it would be considered artificial. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3hrapg/eli5_why_are_things_that_humans_make_considered/ | {
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"This is because of their very definitions. Artificial does not mean fake, it means the item was something that was made by human skill. As opposed to natural which means something that was created by nature - Eg. created by... | [] | [] | [
[],
[]
] | ||
7kqigy | Why can't human cells use anaerobic processes to create ATP when in an atmosphere of no oxygen? | I know that some single-celled organisms are capable using fermentation to catabolize glucose and other sugars to create ATP in the absence of oxygen, so what prevents humans from being able to do the same? We have the enzymes necessary and use anaerobic fermentation at times of high exertion, so why can't we use ferme... | askscience | https://www.reddit.com/r/askscience/comments/7kqigy/why_cant_human_cells_use_anaerobic_processes_to/ | {
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"_URL_0_\n\nAnaerobic glycolysis only produces 2 ATP per glucose, compared to a maximum of 38 with aerobic glycolysis.\n\n_URL_1_\n\n > Virtually all tissues have a requirement for glucose to function normally. Glycolysis i... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Anaerobic_glycolysis",
"https://www.openanesthesia.org/aba_aerobic_vs/"
],
[]
] | |
4y2pzt | for a human, when is the period of most rapid development in the brain? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4y2pzt/eli5for_a_human_when_is_the_period_of_most_rapid/ | {
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"Not counting *in utero* growth of the brain, yes, the brain develops most rapidly in the first 3 years of life.\n\nDevelopment doesn't mean growth in mass alone, however. It also means refining neural connections, which also means that some conne... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Synaptic_pruning"
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8ul7kg | Black holes. If they did not exist, could galaxies sustain themselves? | I am curious... Do galaxies depend on black holes to maintain its structure?
How do these extraordinarily massive spinning star-frisbees stay so balanced like a fully functional solar system? | askscience | https://www.reddit.com/r/askscience/comments/8ul7kg/black_holes_if_they_did_not_exist_could_galaxies/ | {
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"Nope. The black hole in the middle of the Milky Way (Sagittarius A\\*) represents 0.04% of the mass of the galaxy, whereas the Sun (which the planets orbit) represents 99.8 - 99.9% the mass of the solar system.\n\nSo if Sag ... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Triangulum_Galaxy"
]
] | |
1y3ips | Can a winter storm have an "eye"? | I live out in Newfoundland, and we are getting hammered by quite the winter storm. This morning, our winds were 110km out of the east, and now they are howling out of the west.
Mid afternoon, the winds were calm and there was blue sky (with a few clouds racing across to the east). Can winter storms have an "eye," pa... | askscience | http://www.reddit.com/r/askscience/comments/1y3ips/can_a_winter_storm_have_an_eye/ | {
"a_id": [
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"text": [
"Yes. Both low and high pressure systems, in fact, can have well-defined centers of circulation around which winds swirl (in the Northern Hemisphere, counterclockwise for low pressure systems and clockwise for high, if I haven't totally lost my mi... | [] | [] | [
[
"http://earth.nullschool.net/#current/wind/surface/level/orthographic=-58.69,47.20,3000",
"http://imgur.com/bJyRTyR"
]
] | |
d73r0j | how do they get fizzy drinks inside cans? | It just seems impossible since you need to open an airtight can to get it out, so how did it get in there? :/ | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d73r0j/eli5_how_do_they_get_fizzy_drinks_inside_cans/ | {
"a_id": [
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"score": [
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"text": [
"Have the can with the top not on, pour in fizzy drink, immediately seal it with the top. Very little space left inside the can to let the fizz escape from the liquid. The small amount that does pressurizes the can, ensuring more cannot escape."
... | [] | [] | [
[]
] | |
1mb566 | How come Glow in the Dark objects seem really bright, but don't illuminate the area around them that well? | askscience | http://www.reddit.com/r/askscience/comments/1mb566/how_come_glow_in_the_dark_objects_seem_really/ | {
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"text": [
"Piggy back question: and why don't they glow in the light?",
"The other answers are a bit too vague or incorrect. Answering this and the follow up question.\n\nJust for information, the unit for th... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Rhodopsin",
"http://en.wikipedia.org/wiki/Lux"
],
[]
] | ||
iajw9 | What the hell happened to me last night!? INCEPTION (for real) details inside... | TL;DR: I don't want a diagnosis, I just want to know what's happening in the body to do that. Is this what sleep paralysis or night tremors are?
I'm prescribed Trazodone to help me sleep. I've had sleep problems most of my life and this has been the only thing that isn't habit forming nor wakes me up in the middle of ... | askscience | http://www.reddit.com/r/askscience/comments/iajw9/what_the_hell_happened_to_me_last_night_inception/ | {
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"Fa... | [] | [] | [
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[],
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3niewu | how does an external battery pack continue to charge my phone when bot my phone and the pack have the same level of charge. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3niewu/eli5_how_does_an_external_battery_pack_continue/ | {
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"text": [
"Say you have a 2 liter bottle and a 20 oz bottle, although both may be at 50 percent capacity, the 2 liter still has more in it."
]
} | [] | [] | [
[]
] | ||
2wyjul | why do humans like/dislike different food if we're all hardwired to only want energy? | Like why would someone dislike a chocolate bar even though its packed with energy? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2wyjul/eli5_why_do_humans_likedislike_different_food_if/ | {
"a_id": [
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"text": [
"Some foods have more readily available energy. Glucose (sugar) tastes good and we crave it because our bodies can quickly convert it into energy. It is not as easily available in our evolutionary past. Densely caloric foods ... | [] | [] | [
[],
[]
] | |
185gfh | Is a vaccine still effective if the person is already infected with the virus? | askscience | http://www.reddit.com/r/askscience/comments/185gfh/is_a_vaccine_still_effective_if_the_person_is/ | {
"a_id": [
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"text": [
"Yes - a good example is the [rabies post-exposure prophylaxis treatment](_URL_1_),which combines a vaccine with anti-rabies antibodies. Research has also shown that [vaccination in the early stages of chicken pox can resolv... | [] | [] | [
[
"http://www.ncbi.nlm.nih.gov/pubmed/19841607",
"http://www.researchgate.net/publication/10833889_UV-induced_DNA_damage_and_repair_a_review/file/9fcfd507e3aafcaef1.pdf"
],
[]
] | ||
1y3a1h | Are all particles in the electromagnetic spectrum photons? | askscience | http://www.reddit.com/r/askscience/comments/1y3a1h/are_all_particles_in_the_electromagnetic_spectrum/ | {
"a_id": [
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"text": [
"The electromagnetic spectrum is simply the range of frequency of photons.",
"The electromagnetic spectrum is not a class of particles like, for example, the Standard Model.\n\nTo translate your question into every-day o... | [] | [] | [
[],
[]
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9zf33p | how can an original gameboy that has been sitting in storage for 6 years still have a full battery charge, while my old cell phone's battery is dead after a couple months? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9zf33p/eli5_how_can_an_original_gameboy_that_has_been/ | {
"a_id": [
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"text": [
"Phones use lithium batteries. Lithium batteries are terrible. AA batteries last 30+ years without being touched",
"Rechargeable Li-Ion batteries generally have a relatively high self-discharge rate... | [] | [] | [
[],
[],
[]
] | ||
27thjb | Why did low-intensity conflict become the norm? | Hello,
I have been a lurker on reddit (especially this subreddit) for a while now but I decided to register for this question: why did low-intensity, guerilla warfare become so prevalent in the last half century? When I look at history, I see many rebellions, revolts, revolutions but battles seemed to be fought mostly... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/27thjb/why_did_lowintensity_conflict_become_the_norm/ | {
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"Part of this is a sort of history bias: it's a lot easier to talk about the battle of Cumae than it is to talk about That Time Those Guys Killed Some People And Took Off. And probably a historian bias, too. There's often a l... | [] | [] | [
[
"http://www.npr.org/templates/story/story.php?storyId=4176645"
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[]
] | |
10kfft | How does pH affect enzymes? | What is it that gets destroyed? Is it the peptide bonds? | askscience | http://www.reddit.com/r/askscience/comments/10kfft/how_does_ph_affect_enzymes/ | {
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"text": [
"It will vary. For example, changes in pH can trigger denaturation of the protein; in other cases, though, there might be a deleterious effect on its function. Hydrolysis of peptide bonds without the aid of an enzyme is rath... | [] | [] | [
[],
[]
] | |
eqbses | How do neurons know not to send the signal in the wrong direction? | I just dont get how neurons know that the signal has to move forward after they receive it. Would it be possible for them to send it back to the Soma if they were "confused" somehow and what would the side effects be?
(Sorry for the bad formation) | askscience | https://www.reddit.com/r/askscience/comments/eqbses/how_do_neurons_know_not_to_send_the_signal_in_the/ | {
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"So the way neurons propagate signals is through a chain of opening and closing of ion channels. The reason it doesn't typically go backwards is because the previously opened ion channels temporarily inactivate and prevent op... | [] | [] | [
[],
[]
] | |
367706 | how is bill cosby just going around the country performing stand up? if 34 people accused someone of rape in any other profession, they would not be performing their normal job. | At the least, how is he not just holed up in his house being forced to stay off stage and out of the public eye?
Edit-37 accusers. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/367706/eli5how_is_bill_cosby_just_going_around_the/ | {
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"Because they are nothing more than accusations. If there is a point where there is law enforcement involvement, then his movements might be restricted.",
... | [] | [] | [
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1lxqas | How long did it take for knowledge of the "discovery" of America to make it to the Muslim world? Did any Muslim leaders send subsequent expeditions to the New World? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1lxqas/how_long_did_it_take_for_knowledge_of_the/ | {
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"text": [
"Additional question: I've heard many of Co... | [] | [] | [
[],
[],
[],
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"https://en.wikipedia.org/wiki/Barbary_Coast",
"http://www.amazon.com/Power-Faith-Fantasy-America-Present/dp/0393330303",
"http://www.amazon.com/The-Algerine-Pennsylvania-Peter-Markoe/dp/1594160635"
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[
"http://www.amazon.com/The-Adventures-Ibn-Battuta-Fourteenth/dp/05202438... | ||
lvgu7 | It seems everybody has a gluten intolerance... Is this a legitimate issue? Or overblown? | I get about a dozen people a week at my coffee house say they have a gluten intolerance. And this number is increasing. "i can't have that it has gluten in it" "Do you have any gluten free baked goods?"
It sprung up over night and now i get a TON people saying they have this intolerance..
I was wondering if this was ... | askscience | http://www.reddit.com/r/askscience/comments/lvgu7/it_seems_everybody_has_a_gluten_intolerance_is/ | {
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"text": [
"I should start off by saying this is not my area of research. However, as a scientist and someone with known gluten problems (likely celiac disease, but thats a different story for a different subreddit), I spend a fair bit... | [] | [] | [
[
"http://www.ncbi.nlm.nih.gov/pubmed/21224837"
],
[
"http://www.ncbi.nlm.nih.gov/pubmed/21224837"
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1omxbb | if someone 'objects' during a wedding ceremony, what happens next? | I've always wanted to know this, and Google is throwing up mixed answers. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1omxbb/eli5if_someone_objects_during_a_wedding_ceremony/ | {
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2aj5j5 | How long after Hitler's suicide did the Allies know the cause of death? | And how did they find out? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2aj5j5/how_long_after_hitlers_suicide_did_the_allies/ | {
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"The Russians found out pretty quickly what happened because they reached Berlin first. However, they ended up capturing most of the witnesses who were present in Hitler's bunker and kept the whole thing a secret (or ambiguous at the least).\n\nA... | [] | [] | [
[]
] | |
tpvo6 | why we should shut down things like computers and gaming consoles instead of just unplugging them. | I always shut down my various machines, and I was just wondering exactly why this is better than just turning them off at the plug. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/tpvo6/eli5_why_we_should_shut_down_things_like/ | {
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"It's to avoid corrupting your data. If the computer is accessing something at the instant it loses power then you may find that certain files don't work when you turn it on again. If it's rewriting your... | [] | [] | [
[],
[],
[]
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2j67pq | if we can use the rectum for effectively absorbing suppositories, how come we don't get blood poisoning from all the bacteria and waste minerals in our faeces? | It doesn't make sense to me. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2j67pq/eli5_if_we_can_use_the_rectum_for_effectively/ | {
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"Just taking a wild g... | [] | [] | [
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8ic513 | Are there any theories of a correlation between massive volcanic eruptions and a reversal of earth's magnetic field? | I was reading this [article](_URL_0_) about increased seismic activity in the Yellowstone basin.
In the article it stated that the last major eruption of the Yellowstone super volcano was about 640,000 years ago, which was about the same time as the last magnetic pole reversal.
Are both Earth's magnetic field and vo... | askscience | https://www.reddit.com/r/askscience/comments/8ic513/are_there_any_theories_of_a_correlation_between/ | {
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"text": [
"No. The mantle is an insulating region and so the magnetic field does not interact with it. Further to this any changes in the fluid flow in the outer core will not propagate through the mantle for millions of years (as this is the timescale for ... | [] | [
"http://www.news.com.au/technology/environment/natural-wonders/quakes-and-eruptions-spark-talks-of-yellowstone-super-volcano/news-story/b1c4804f8e70fc50b6795acdded3e5fe"
] | [
[]
] | |
2g05x7 | on to catch a predator, what crime are those guys committing? | They *thought* they were talking to a 13 year old girl, but they were talking to an adult pretending to be a 13 year old girl. Isn't that just roleplay? There were no kids involved, but there are cops and those guys get arrested.
If they said "I thought we were roleplaying, I never expected her to *actually* be 13" ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2g05x7/eli5_on_to_catch_a_predator_what_crime_are_those/ | {
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6tios5 | Why were there no Nuremburg-type trials for Confederate leaders after the American Civil War? | Was there a call for such trials from union political leaders or the populace? It seems that the confederate leaders got off fairly easily for conducting an armed rebellion and engaging in what could be considered war crimes. Was it felt that holding confederate leaders to account would be counter-productive, turning t... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6tios5/why_were_there_no_nuremburgtype_trials_for/ | {
"a_id": [
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"text": [
"In was Lincoln's expressed wish that such tribunals not be held. During the River Queen conference that Lincoln held in March 1865 (this was on the steamer 'River Queen'), he told Gen. Grant, Gen. Sherman, and Admr. Porter his intentions for hand... | [] | [] | [
[]
] | |
3wxa2m | If there were more/less than 24 hours in a day, would humans have adapted to need more/less sleep? | askscience | https://www.reddit.com/r/askscience/comments/3wxa2m/if_there_were_moreless_than_24_hours_in_a_day/ | {
"a_id": [
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"text": [
"We can't say for sure because we still have such a rough idea of what sleep is actually for. We know there are harmful effects from sleep deprivation (there is a reason it is considered a form of torture) and all mammals have evolved to need slee... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Sleep_(non-human\\)"
]
] | ||
46qb6v | Prior to their presidency, have any Presidents of the United States ever been cited, arrested, or gone to jail? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/46qb6v/prior_to_their_presidency_have_any_presidents_of/ | {
"a_id": [
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"score": [
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"text": [
"Washington, Jefferson and Adams were tried and convicted of treason in absentia by the British. \n\nAndrew Jackson was imprisoned by the British during the revolutionary war. He also publicly killed a man in an illegal duel, though he was never c... | [] | [] | [
[]
] | ||
abnxr6 | Do the the planets in the solar system have any effect on the planets near them (gravitational pull for example)? If any of the planets were destroyed somehow, would that have consequences for the rest of the solar system? | askscience | https://www.reddit.com/r/askscience/comments/abnxr6/do_the_the_planets_in_the_solar_system_have_any/ | {
"a_id": [
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"score": [
3,
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2
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"text": [
"A little bit. Measurable but not with consequence for e.g. someone just looking into the sky. The [perihelion precession of Mercury](_URL_0_) is a famous test of general relativity, but 90% of it actual... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Tests_of_general_relativity#Perihelion_precession_of_Mercury"
],
[],
[]
] | ||
1dvrs7 | What is the distance to the horizon from the ISS? | I follow Chris Hadfield's Facebook page, he has great picture of Earth from the cupola module of the ISS, but the Earth looks unexpectedly close from orbit. I don't understand the trigonometry calculations, and whether the horizon appears further than calculated due to a mirage effect through the atmosphere. So my ques... | askscience | http://www.reddit.com/r/askscience/comments/1dvrs7/what_is_the_distance_to_the_horizon_from_the_iss/ | {
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"text": [
"It's been a few decades since I took geometry, but here's my back-of-the-envelope calculation for distance-to-horizon:\n\n_URL_1_\n\nResult: about 2330 kilometers using average val... | [] | [] | [
[
"http://www.heavens-above.com/orbit.aspx?satid=25544",
"http://i.imgur.com/0JcVOYB.png"
],
[],
[],
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4bkhgt | Is there any plant in the world that can induce a miscarriage? | I used to live in the Philippines. Abortion is illegal there, and when women would get pregnant they would try to abort the baby by eating some sort of plant.
I don't think it's worked, it certainly hasn't for one of my cousins.
But it got me thinking, is there any plant in the world that could induce a miscarriage? | askscience | https://www.reddit.com/r/askscience/comments/4bkhgt/is_there_any_plant_in_the_world_that_can_induce_a/ | {
"a_id": [
"d19zuwh"
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"text": [
"There certainly are plants that have been used as abortifacients. The real issue is balancing abortive intent with full-on toxicity and potential for harm to the pregnant woman. These are extremely difficult to study in a controlled fashion as we... | [] | [] | [
[
"http://www.merckvetmanual.com/mvm/reproductive_system/abortion_in_large_animals/abortion_in_goats.html",
"http://www.merckvetmanual.com/mvm/reproductive_system/abortion_in_large_animals/abortion_in_cattle.html",
"http://www.ncbi.nlm.nih.gov/pubmed/12807304"
]
] | |
1vffif | Is how the bible is written now how books / text was written in that time? | I'm not trying to start any kind of religious battle at all, I'm seriously wondering:
the bible we have today is written in verse/prose style. Was that how other documents of the time were also written?
Per historical information I have seen, the writing of the bible / new testament wasn't done until approximately... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1vffif/is_how_the_bible_is_written_now_how_books_text/ | {
"a_id": [
"cerz4in"
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"score": [
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"text": [
"Something that you should take into account is that the Bible contains many different forms of literature. Some of the Books contain prose narrative (Exodus or the Gospels for example) where others are poetry or songs (the Psalms) and therefore ... | [] | [] | [
[]
] | |
hskij | A hypothetical question | Lets say I (hypothetically) threw a plugged in toaster into the ocean. What would be the range of the electric current that would travel through the water? Would it just keep going? If there was a person a mile away, would they feel it? | askscience | http://www.reddit.com/r/askscience/comments/hskij/a_hypothetical_question/ | {
"a_id": [
"c1y0kcn"
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"score": [
4
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"text": [
"Throwing a toaster into the ocean would short circuit the toaster, allowing current to flow from the hot wire to neutral or ground. Since electricity will travel along the path of least resistance, its unlikely that a person would be harmed by t... | [] | [] | [
[]
] | |
253dh3 | What causes molecules/ atoms to be in constant motion? | askscience | http://www.reddit.com/r/askscience/comments/253dh3/what_causes_molecules_atoms_to_be_in_constant/ | {
"a_id": [
"chdbc0s"
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"score": [
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"text": [
"Being above zero degrees kelvin. You can think of temperature as being an average of the kinetic energy of the molecules in a substance. As you probably already know, the more energy/heat you add to something the higher the temperature. If a mole... | [] | [] | [
[]
] | ||
40w7qn | i understand "heat" but what creates "coldness"? what makes up the cold waves that i feel when i put my hand near an ice block? | I understand heat is created by moving atoms and molecules, the faster they move the hotter it gets but what about "coldness"? If "coldness" created by atoms and molecules not moving then why do I feel cold waves when i put my hand near an ice block? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/40w7qn/eli5_i_understand_heat_but_what_creates_coldness/ | {
"a_id": [
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"The temperature of the ice block affects the air around it.\n\nIt cools the air immediately around it, which makes it more dense, and thus heavier, and it falls to ground. When it does this, it displaces other air.\n\nMeanwhile, more hot air has ... | [] | [] | [
[]
] | |
aju7tw | why/how is a 24 mp full frame camera sensor better than a 26 mp aps-c camera sensor | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aju7tw/eli5_whyhow_is_a_24_mp_full_frame_camera_sensor/ | {
"a_id": [
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"text": [
"Full frame definitely has advantages when using wide lenses and take a wider variety of them. Cropped sensors can distort the imagery with some lenses, but do have other advantages like bieng smaller of... | [] | [] | [
[],
[],
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1684i3 | What would be different about our solar system and Earth if we were located in the Eagle nebula or somewhere similar? | I know that a nebula is a cloud of dust and gas and some are star-forming regions. I was wondering if we could survive as a species in a star-forming nebula. The problems I could see might include less light reaching the earth but what about radiation, asteroids, collisions, the density of dust and gas? Is life likely ... | askscience | http://www.reddit.com/r/askscience/comments/1684i3/what_would_be_different_about_our_solar_system/ | {
"a_id": [
"c7txplc"
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"score": [
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"text": [
" > I know that a nebula is a cloud of dust and gas and some are star-forming regions. I was wondering if we could survive as a species in a star-forming nebula\n\nWith active star formation comes active star death. In these areas, supernovae and ... | [] | [] | [
[]
] | |
4w1uiv | What happens when opposite magnetic poles meet? | There's a gif in r/oddlysatisfying of a n/s magnet in a container of iron filings in some kind of solution. The filings aren't attracted to the center. What's happening? | askscience | https://www.reddit.com/r/askscience/comments/4w1uiv/what_happens_when_opposite_magnetic_poles_meet/ | {
"a_id": [
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"text": [
"If you look at the magnetic force between the magnet and one of the iron filings, it will in general have a component in the radial direction, but it scales like 1/(distance)^(4). So it's very weak unless the dipoles are very close to each other.... | [] | [] | [
[]
] | |
l6yyo | Are there any easily-understood evidences for macroevolution that even the strongest detractors could understand? | I know that the fossil record shows linking species between certain species that we have recorded, and that is all well and good, but I am wondering if there are any good evidences for macroevolution that I could plainly say "hey, check this out", very clearly showing an instance of macroevolution that all people under... | askscience | http://www.reddit.com/r/askscience/comments/l6yyo/are_there_any_easilyunderstood_evidences_for/ | {
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"score": [
6,
31,
13,
9,
22,
9,
... | [] | [] | [
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"http://en.wikipedia.org/wiki/E._coli_long-term_evolution_experiment"
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"http://en.wikipedia.org/wiki/Recurrent_laryngeal_nerve"
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[],
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"http://en.wikipedia.org/wiki/Appeal_to_... | |
7gzth5 | why is there no warning light for when your headlights or breaklights are no longer functioning? | I feel like a lot of people get pulled over for that sort of thing bc they just don't realize it was broken in the first place. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7gzth5/eli5_why_is_there_no_warning_light_for_when_your/ | {
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"If a headlight is out, it's usually pretty obvious.\n\nIf a taillight is out, the parking brake indicator usually comes on.",
"Depends on my car, my old VW golf absolutely did ... | [] | [] | [
[],
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2q7491 | what exactly is happening in your muscles as you get older and sudden vigorous activity makes you much more sore the following day, and the soreness lasts longer. | I'm in my mid 40's and the example I'm thinking of is playing flag football on Thanksgiving. I remember being in my 20's and being sore the day after, but not too bad. Then in my 30's I noticed a big uptick in the level of soreness. Now in my 40's it's almost crippling and lasts several days. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2q7491/eli5_what_exactly_is_happening_in_your_muscles_as/ | {
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"Muscles are tissues. They rip and get repaired. Your cells could only replicate so many times before the process becomes less effective. (Aging)\n\nAs for being sore, the lactic acid your muscles are not being cleared out fa... | [] | [] | [
[],
[]
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qhnb3 | the point of high fashion | It seems to me that with the exception of Lady Gaga and Katy Perry, no one goes around dressed in some of the crazy things that come down the runway. I know that not all fashion shows are meant to be avant garde and those can translate into something that I would where but what is the point of pretending that these loo... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/qhnb3/eli5_the_point_of_high_fashion/ | {
"a_id": [
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9
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"text": [
"Fashion shows like those are not there to show how you are supposed to wear the clothes, it just shows what the designer's visions and inspirations are. You are supposed to take elements from it and mak... | [] | [
"http://www.smashinglists.com/20-weirdest-fashion-runway-trends/"
] | [
[
"http://batchplease.com/a/2011/02/rihanna-carven-cutout-dress.jpg"
],
[],
[]
] | |
4ikgfe | How historically accurate is the film 300? | when I first saw it I thought (as I'm sure most people do) that it was completely ridiculous how they portrayed thermopolae, but whilst reading Herodotus' Histories, I saw that he describes how the Spartans threw two Persian diplomats into a well. this bears a striking resemblance to [this](_URL_0_) scene, and it got... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4ikgfe/how_historically_accurate_is_the_film_300/ | {
"a_id": [
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"text": [
"In its essence, *300* is a retelling of Herodotos' account of the battle of Thermopylai (480 BC), meaning that its basic narrative is as historically accurate as we could hope for. However, there are at least 3 layers of h... | [] | [
"https://www.youtube.com/watch?v=-qR0Uke2XNI"
] | [
[
"http://files.thecobbs.com/a33_lot173_0-max.jpg"
],
[]
] | |
zcrlq | how do radar and sonar work? | I never really understood how radar and sonar work. I think it has something to do with bouncing off of objects. Could someone please explain? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/zcrlq/eli5_how_do_radar_and_sonar_work/ | {
"a_id": [
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"text": [
"You bounce radio waves off of something and they eventually come back, a computer then shows the range, speed, altitude or depth as well as terrain. ",
"Think of spitting down a hole. The longer it ... | [] | [] | [
[],
[],
[]
] | |
6it3el | how do snipers make kill shots over 2 miles away? hiw do they correct for all the variables that come into play with a shot that long? | Question inspired by the recent longest confirmed kill by a Canadian sniper. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6it3el/eli5_how_do_snipers_make_kill_shots_over_2_miles/ | {
"a_id": [
"dj8tg3n"
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"score": [
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"text": [
"An incredible amount of training, a shitload of experience, and not a small amount of luck, in some cases.\n\nAt that distance, there are so many variables to take into account that they make computer programs to help get the math right. If you l... | [] | [] | [
[]
] | |
1bxfex | networking: what it is, how to do it, and how to use it. | So I get the general, overarching idea of networking. Know people, get jobs from knowing people.
I know NOTHING past that. NOTHING at all, and given that I know I'm in the perfect position to network, I'd like to know all about it.
And please give a step-by-step on how to do it. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1bxfex/eli5_networking_what_it_is_how_to_do_it_and_how/ | {
"a_id": [
"c9aztcf"
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"score": [
31
],
"text": [
"Keep in mind that many, many people get their jobs or find out about job opportunities from friends, acquaintances and co-workers (rather than things like job postings). One of the goals of networking is to ensure that when someone hears about a... | [] | [] | [
[]
] | |
u8cez | What is the slowest recorded speed of sound? | If sound travels slowest in a gas and even slower in cold gasses, what is the slowest recorded speed of sound? | askscience | http://www.reddit.com/r/askscience/comments/u8cez/what_is_the_slowest_recorded_speed_of_sound/ | {
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6,
6,
3
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"text": [
"The more loose the gas is, the slower the speed at which sound travels in it. What this means is that as the gas loosens, the speed will gradually decrease until the vibrations in the gas will cease to ... | [] | [] | [
[],
[],
[]
] | |
7t5rej | why do preachers talk the way they do? | Is it something akin to auctioneer's speech, where it is a learned thing among the subculture, or is it unique to the individual preacher? They all sound the same. Is there a reason behind it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7t5rej/eli5_why_do_preachers_talk_the_way_they_do/ | {
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"text": [
"It likely comes from the days before microphones. Short sentences, projected voice, and this instilled a style of speaking which has continued due to the organic nature of it.",
... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Maze_Jackson"
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65hvov | why can't scientists send an empty, satellite controlled submarine with cameras into the bermuda triangle and discover it's mystery? also, how far are we from discovering it's secrets? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/65hvov/eli5_why_cant_scientists_send_an_empty_satellite/ | {
"a_id": [
"dgaer05"
],
"score": [
4
],
"text": [
"There is no mystery to the Bermuda Triangle. It has virtually average rates of ship disappearances and plane crashes as any other populated region. The idea that things magically vanish there is a myth. "
]
} | [] | [] | [
[]
] | ||
4x51k9 | how do sheep herding dogs, know how to herd? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4x51k9/eli5_how_do_sheep_herding_dogs_know_how_to_herd/ | {
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5,
12
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"text": [
"Instincts. A pack of wolves will know that a tight group is better to catch than a loose group.",
"A combination of training and inbred instinct.\n\nA couple hundred years of artificial selection ... | [] | [] | [
[],
[],
[]
] | ||
8o07bw | How do we know there's a Baryon asymmetry? | The way I understand it, is that we see only matter, and hardly any antimatter in the universe, and we don't understand where all the antimatter went that should have been created in the Big Bang as well, and this is called the Baryon asymmetry.
However, couldn't this just be a statistical fluke? If you generate matte... | askscience | https://www.reddit.com/r/askscience/comments/8o07bw/how_do_we_know_theres_a_baryon_asymmetry/ | {
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167,
82,
33,
6,
32,
5,
3
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"text": [
"The only observed ways that matter is created is when an antimatter-matter pair of pa... | [] | [] | [
[],
[
"https://www.scientificamerican.com/article/how-do-we-know-that-dista/"
],
[
"https://physics.stackexchange.com/questions/274780/baryon-photon-ratio?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa",
"https://www.popularmechanics.com/space/a27259/how-many-part... | |
6xswsk | How were the modern provinces of South Africa chosen? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6xswsk/how_were_the_modern_provinces_of_south_africa/ | {
"a_id": [
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"text": [
"The [Commission on the Demarcation/Delimitation of States, Provinces and Regions collected a lot of information in 1993](_URL_0_) in its purview of trying to create viable, internally consistent, and functional governments. ... | [] | [] | [
[
"http://wiredspace.wits.ac.za/handle/10539/17933"
],
[
"http://web.archive.org/web/20070827141350/https://www.issafrica.org/pubs/ASR/7No2/Griggs.html"
]
] | ||
2o2jdv | in the us, how is flag burning legal when it's clearly stated against the law? | So first off, I did a search and didn't find it.
Second, as usual my family is spouting off at the mouth without any real knowledge of events on Facebook, but they did get me thinking, is flag burning technically legal? I thought it was, but I like to do my research and be positive. So I did a Google search and came... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2o2jdv/eli5_in_the_us_how_is_flag_burning_legal_when_its/ | {
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12,
2,
3
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"text": [
"Flag burning is protected first amendment speech. The supreme court case Texas v Johnson stated that any laws prohibiting flag burning are unconstitutional.",
"To my knowledge, flag burning restric... | [] | [
"http://www.law.cornell.edu/uscode/text/18/700",
"http://thelawdictionary.org/article/is-flag-burning-illegal/"
] | [
[],
[
"http://en.wikipedia.org/wiki/Texas_v._Johnson"
],
[
"http://en.wikipedia.org/wiki/United_States_v._Eichman"
]
] | |
23mt4v | how is it possible for someone to survive riding in the wheel well of a jet at 36,000 feet for several hours? | With the cold temps and lack of oxygen I just don't get what happens to allow the person to survive it. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23mt4v/eli5_how_is_it_possible_for_someone_to_survive/ | {
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"Like most of the stories going, he entered a staye of hibernation. This is possible. Ive heard stories of people being trapped underwater in subfreezing temps but what happens is the body keeps only the vitals alive. Ive ... | [] | [] | [
[],
[]
] | |
aciyui | How does a stomach bug function and what effect does the virus itself have on the human body? | I've been throwing up since 5am this morning so that's got me thinking. Why do we throw up with a stomach bug. If a virus needs a host, why would it cause someone to throw it up. What would happen to someone if they weren't able to throw up?
And is throwing up the thing that cures the virus or does the body cure the vi... | askscience | https://www.reddit.com/r/askscience/comments/aciyui/how_does_a_stomach_bug_function_and_what_effect/ | {
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"If your body is trying to digest something and sees something wrong, it will force you to vomit. It may not notice it until it gets into your intestines, which is where the real digestion happens. Once it sees it, the body ... | [] | [] | [
[],
[
"https://www.sciencedaily.com/releases/2011/07/110718085218.htm",
"https://www.mdpi.com/1999-4915/2/3/748"
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] | |
5ra2l5 | why are modern depictions of the future often dystopic, compared to the bright and positive predictions in the past? | In the past (particularly the late 19th and early 20th centuries) predictions of the future were filled with amazing inventions and a happy society. Modern predictions are filled with crumbling civilizations, plagues, and collapse of society. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ra2l5/eli5_why_are_modern_depictions_of_the_future/ | {
"a_id": [
"dd5kp1k",
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"score": [
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"text": [
"Science Fiction is less of a prediction mechanism and more of a window into what people are currently thinking. In early sci-fi, the goal was to exploit a possible future where people became better as ... | [] | [] | [
[],
[],
[]
] | |
89erf3 | What are good books on the history of the exploration of the Antarctic? | Hey everyone, after having watch the anime "A Place Further Than The Universe" (Which, if you haven't watch, do, its a 10/10 imo), I have become interested in the topic of Antarctic. So, what are some good suggestions for books and resources on it? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/89erf3/what_are_good_books_on_the_history_of_the/ | {
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"So, while this not strictly a specific answer to your question, a good place to look for stuff like this (imo) is the [*Isis Bibliography of the History of Science*](_URL_0_), which has been made into a database for public u... | [] | [] | [
[
"https://data.isiscb.org/"
],
[
"https://www.amazon.com/Last-Place-Earth-Amundsens-Exploration/dp/0375754741"
]
] | |
rnuom | why does my device's light stay on for a second after i turn off the power? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/rnuom/eli5_why_does_my_devices_light_stay_on_for_a/ | {
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"Everything is still discharging. Basically, the power isn't completely off yet.",
"Capacitors, they're an electrical component that effectively act like t... | [] | [] | [
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7dplnb | in this age of sophisticated online tracking and surveillance, how are criminals able to transfer money through multiple offshore accounts, and be able to withdraw it, without the trail being followed and their identity discovered? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7dplnb/eli5_in_this_age_of_sophisticated_online_tracking/ | {
"a_id": [
"dpzir1o",
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"text": [
"Most often, by using an account of a business whose owners are secret, and/or in a country where banking privacy laws prohibit revealing who owns an account without a ton of paperwork.\n\nSometimes, by withdrawing the money ... | [] | [] | [
[],
[]
] | ||
1aljuh | Please recommend a book about the life in Nazi concentration camps, especially from psychological and sociological perspective | Hello,
can you please recommend a book (books) to me about the life in WW2 concentration camps? I'm interested especially in the psychological and sociological perspective.
What was the life and society like under extreme duress? What social structure arose among the prisoners? What were the relationships between the ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1aljuh/please_recommend_a_book_about_the_life_in_nazi/ | {
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"text": [
"I think [Man's Search for Meaning](_URL_0_) is right up your alley. You might want to just read the first half, which is one of the most famous Holocaust mem... | [] | [] | [
[
"http://www.amazon.com/Mans-Search-Meaning-Viktor-Frankl/dp/080701429X"
],
[
"http://www.amazon.com/Survival-In-Auschwitz-Primo-Levi/dp/9562915301",
"http://www.amazon.com/One-Day-Life-Ivan-Denisovich/dp/0451228146/ref=sr_1_1?s=books&ie=UTF8&qid=1363717687&sr=1-1&keywords=one+day+i... | |
mlzkg | soap vs rest vs json and why one is better than the other. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mlzkg/eli5_soap_vs_rest_vs_json_and_why_one_is_better/ | {
"a_id": [
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"score": [
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"text": [
"OK, first of all they are three slightly different things.\n\nREST describes a method for creating APIs or informational services. A RESTful API or service allows clients to make requests to it in the form \"verb object\" wh... | [] | [] | [
[],
[]
] | ||
2daqyf | how are nielsen homes selected for nielsen ratings? if i watch a show and don't have a nielsen box, am i helping that show's ratings at all? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2daqyf/eli5_how_are_nielsen_homes_selected_for_nielsen/ | {
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6k8o8z | I have read that the conflicts of the Hundred Years War put both England and France into very considerable debt, who paid for this? | How were these wars financed and how was this money used? Where did the initial funds/resources come from? How were they paid off in a system where many didn't even earn a wage in any modern sense? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6k8o8z/i_have_read_that_the_conflicts_of_the_hundred/ | {
"a_id": [
"djl3hbz"
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"score": [
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"text": [
"So your question has several moving parts. Let me answer each one separately. \n\n > How were these wars financed and how was this money used?\n Where did the initial funds/resources come from? \n\nThese two questions are actually very interlinke... | [] | [] | [
[
"http://ramscholar.openrepository.com/ramscholar/handle/10675.1/17"
]
] | |
4e5682 | how do animals like ants and birds instinctually know how to build their dwellings/homes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4e5682/eli5_how_do_animals_like_ants_and_birds/ | {
"a_id": [
"d1x539j",
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"d... | [] | [] | [
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"http://hubpages.com/animals/how-do-birds-learn-to-build-their-nests",
"http://lansingwbu.blogspot.nl/2011/03/ever-wonder-how-birds-know-how-to-build.html",
"http://biology.st-andrews.ac.uk/stories/2011_07_25.aspx",
"http://www.dailymail.co.uk/sciencetech/article-2041933/Birds-learn-build-better-n... | ||
5zgkfd | how inheritances work and why people covet them so much? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5zgkfd/eli5_how_inheritances_work_and_why_people_covet/ | {
"a_id": [
"dexxguq"
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"score": [
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"text": [
"How they work: Relatives leave you money in their will and when they die you inherit that money\n\nWhy they're coveted: Free money"
]
} | [] | [] | [
[]
] | |
2vlbqi | Are there different "kinds" of mathematics/physics in the universe? | If we take Coulomb as an example. It is equal in magnitude to the charge of 6.241×10^18 electrons.
Now, theoretically, say there are humans just as evolved as us on a different planet. Would they also use "Coulomb" as a constant? (other word for it obviously) | askscience | http://www.reddit.com/r/askscience/comments/2vlbqi/are_there_different_kinds_of_mathematicsphysics/ | {
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"text": [
"No. There is nothing fundamental about the Coulomb. It's based on other human constructs. \n\nOf course, things will still act the same way under a \"different\" kind of physics. ",
"Values of constants are chosen arbitr... | [] | [] | [
[],
[]
] | |
1bmnl7 | Are Hydrogen Bonds and Van der Waal's Forces related in anyway? If so, how? | askscience | http://www.reddit.com/r/askscience/comments/1bmnl7/are_hydrogen_bonds_and_van_der_waals_forces/ | {
"a_id": [
"c982wyh"
],
"score": [
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"text": [
"I think the short answer would be: not really. Hydrogen bonds are a particular strong form of dipole-dipole intermolecular interactions. The only real relationship in that both VDWF and HB are intermolecular forces."
]
} | [] | [] | [
[]
] | ||
297lyz | Do New York City's skyscrapers have any noticeable effects on the city's weather? | What about the city's pavement? I would be curious to know in general how an urban environment alters a city's weather. | askscience | http://www.reddit.com/r/askscience/comments/297lyz/do_new_york_citys_skyscrapers_have_any_noticeable/ | {
"a_id": [
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],
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"text": [
"Cities affect the local climate. Generally, they are warmer due to materials (concrete, asphalt, etc.) and the lack of evapotranspiration due to lack of vegetation. They are generally less windy (because of tall buildings) and develop street cany... | [] | [] | [
[]
] | |
1pl929 | how many vitamins do you really need to stay healthy? | It just seems like there are so many different kinds of vitamins, and when I think about what I ate during the day, there's no way I'm getting all of those. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1pl929/eli5_how_many_vitamins_do_you_really_need_to_stay/ | {
"a_id": [
"cd3grmg"
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"score": [
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"text": [
"Biochemically, a vitamin is a co-factor for an enzyme in a reaction somewhere in your body. That means they are not consumed by whatever chemical reaction they are helping with. That means you don't technically need a steady supply in your diet s... | [] | [] | [
[
"http://fnic.nal.usda.gov/food-composition/individual-macronutrients-phytonutrients-vitamins-minerals/vitamins-minerals"
]
] | |
211z8p | vacuums, not the machine, the actual process of a vacuum and is the vacuum of space a true vacuum? | I understand things get sucked into vacuums but how is the vacuum created? Is drinking from a straw the same thing? And why if you plug one end of the straw soda stays inside the straw? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/211z8p/eli5_vacuums_not_the_machine_the_actual_process/ | {
"a_id": [
"cg8utct",
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"score": [
3,
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"text": [
"A vacuum is simply an area where no 'stuff' (matter) is present. Certain parts of space are vacuums because there is nothing there. No stuff. No matter. \n\nThings do not simply fly out into vacuums like a vacuum cleaner ... | [] | [] | [
[],
[]
] | |
5epfpa | Are Coptic Christians in Egypt descended from Ancient Egyptians or Greco-Romans? Where do they come from? | I have read Copts claim to be the direct descendents of Ancient Egyptians, but I've also read things written by people that they are actually descendents or leftovers from the Greek or Roman period of Egypt.
Who exactly are the Copts and who were their ancestors? Do they share the same ancestors as Egyptian Arab-Musli... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5epfpa/are_coptic_christians_in_egypt_descended_from/ | {
"a_id": [
"daed7gi"
],
"score": [
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"text": [
"I can't speak for their genetics, but the Coptic language is a direct descendant of Ancient Egyptian, albeit written in a Greek script. Since the Copts did not originate as an ethnoreligious group but rather morphed into one over time, it's most ... | [] | [] | [
[]
] | |
1tdw3c | when suicidal, how can we be determined to kill ourselves, but our body does everything it can to stop us? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1tdw3c/eli5_when_suicidal_how_can_we_be_determined_to/ | {
"a_id": [
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"score": [
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"text": [
"We can perform many actions voluntarily. Suicide can lead to one overriding any mental barriers which would caus... | [] | [] | [
[
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2077351/",
"http://en.wikipedia.org/wiki/Brain-derived_neurotrophic_factor#Function"
],
[],
[],
[],
[],
[],
[]
] | ||
50cg2n | Hi, my name is jack, I'm 14 years old, and I love Baseball. I would like to know when a pitcher throws a baseball, how does it curve? | I found this gif on my front page as soon as I made an account here so it kind of helps me make the question more clear. Here is a pitcher throwing what is known to be a "Knuckleball" and it has a lot of breakdown to it, I want to know what makes a ball curve like this. _URL_0_
Thank you everyone. And remember science... | askscience | https://www.reddit.com/r/askscience/comments/50cg2n/hi_my_name_is_jack_im_14_years_old_and_i_love/ | {
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... | [] | [
"https://gfycat.com/WhichUnnaturalAsianlion"
] | [
[
"http://www.iflscience.com/physics/spinning-basketball-drops-and-swerves-away-due-magnus-effect/"
],
[
"http://baseball.physics.illinois.edu/knuckleball.html",
"http://imgur.com/a/nWkha"
],
[
"https://www.grc.nasa.gov/www/k-12/airplane/Images/mix.gif"
],
[],
[
"http://www.science... | |
19baf9 | How did religion factor in to Genghis Khan's expansionism? | From my knowledge Genghis Khan never really cared about religion and avoided a significant amount of hostility because of this approach and his merit based hierarchy. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/19baf9/how_did_religion_factor_in_to_genghis_khans/ | {
"a_id": [
"c8miclu"
],
"score": [
2
],
"text": [
"You might find [this](_URL_0_) thread an interesting read. It's a discussion on the religious tolerance of the Mongols. "
]
} | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/18d8ed/what_was_ghengis_khans_motivation_behind_his/"
]
] | |
bft541 | why do cpus and gpus perform better when cool | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bft541/eli5_why_do_cpus_and_gpus_perform_better_when_cool/ | {
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"text": [
"If a processor is cool enough, it will often speed its clock (which controls how fast things happen) up, balan... | [] | [] | [
[],
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[]
] | ||
34dacr | With today's anniversary of the fall of Saigon, I cant help but ask, what did the U.S. do wrong in Vietnam? | I know its a broad question so let me narrow it down some.
* Was the original premise of U.S. involvement wrong? Primarily that policy makers interpreted a civil war as theater of a wider anti-communist struggle.
* How did military strategists approach the conlict and what were the principal aspects of its failure (o... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/34dacr/with_todays_anniversary_of_the_fall_of_saigon_i/ | {
"a_id": [
"cqtvi95"
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"score": [
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"text": [
" > Was the original premise of U.S. involvement wrong? Primarily that policy makers interpreted a civil war as theater of a wider anti-communist struggle.\n\nWhether or not the original premise of U.S. involvement was wrong is a question which ... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1nxqgl/to_what_extent_was_counterinsurgency_actually/ccn28io",
"http://www.reddit.com/r/AskHistorians/comments/2wmizc/what_was_the_united_states_overall_goal_during/coseawv"
]
] | |
51knh8 | Why doesn't it rain in Mediterranean climates in the summer months around the world? | Edit: The precipitation amounts range from nil to a few millimeters as compared to summer in other climates in the world. | askscience | https://www.reddit.com/r/askscience/comments/51knh8/why_doesnt_it_rain_in_mediterranean_climates_in/ | {
"a_id": [
"d7fdc4k"
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"score": [
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"text": [
"If you look at a map of [the Mediterranean climates around the world](_URL_0_), you'll see that they share a set of common features:\n\n* They're all located around 30° latitude,\n* They're all located on the east side of large oceans.\n\nThis is... | [] | [] | [
[
"https://sites.google.com/site/climatetypes/mediterranean",
"https://en.wikipedia.org/wiki/Atmospheric_circulation"
]
] | |
2555t7 | In the new Kingdoms that emerged after the fall of the Western Roman Empire, when did the distinction between Barbarian and Roman disappear? | What I'm referring to is the era when the citizens of these new Kingdoms stop differentiating themselves ethnically along the lines of either "Roman" or [Insert name of Germanic tribe].
We know that when the "Barbarian" invaders settled on what were previously Roman provinces, they didn't immediately intermingle with ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2555t7/in_the_new_kingdoms_that_emerged_after_the_fall/ | {
"a_id": [
"chdwwwj",
"che497v"
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"score": [
5,
2
],
"text": [
"You might be interested by [this](_URL_0_) old post, which, though it is centered on Aquitaine, tries to address the same question for Gaul. I can (try to) answer follow-up questions if you have any.",
"It really depends... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1wxbry/were_the_late_merovingian_kings_really_as_useless/cf6tovg"
],
[]
] | |
38sryb | "it's the amps which kill you not volts." but, wouldn't amps be always constant for given volt, as r=v/i. (where r of human body is same) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/38sryb/eli5_its_the_amps_which_kill_you_not_volts_but/ | {
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"text": [
"It depends on the power source. Some power sources limit the amount of current that can be drawn independently of the supplied voltage.\n\nFor example, many AC-DC adapters will limit the current outpu... | [] | [] | [
[],
[],
[]
] | ||
1g8k8f | hockey lines and a coach's strategy on when to change. | Anything you know about hockey lines. Is the first line usually the best? Why do the players change their usual lines during a power play? Thanks for the help. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1g8k8f/eli5_hockey_lines_and_a_coachs_strategy_on_when/ | {
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"text": [
"The first line is generally the best and has the superstar players on it. In most cases there are four lines played in a game with the fourth line only being played sometimes. \n\nUsually on the secon... | [] | [] | [
[],
[],
[]
] | |
4paldz | what means if a song gets certified platinum by riaa? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4paldz/eli5_what_means_if_a_song_gets_certified_platinum/ | {
"a_id": [
"d4jc0cz"
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"score": [
3
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"text": [
"It is an official recognition of the number of units sold.\n\nIt means the work has sold a million copies.\n\nThere is also gold which marks half a million sales and multi platinum which marks 2 million sales."
]
} | [] | [] | [
[]
] | ||
30cmjx | Why does the warp of a CD not match its spin? | Made a gif from the slow mo guys: _URL_0_
They said it themselves, the warp of the CD doesnt appear to match the speed that the disc is spinning at. Anyone know why this is?
Thanks | askscience | http://www.reddit.com/r/askscience/comments/30cmjx/why_does_the_warp_of_a_cd_not_match_its_spin/ | {
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"text": [
"I'm guessing it's a frame rate effect. \n\nThe warp could well be of a high frequency vibration which is at a higher frequency than the frame rate of the camera. \n\nThey have in effect under-sampled the event. You need to h... | [] | [
"http://imgur.com/PpshWaf"
] | [
[],
[]
] | |
ckc9ug | why are all negative temperatures hotter than the planck temperature? | Edit: *negative absolute temperatures. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ckc9ug/eli5_why_are_all_negative_temperatures_hotter/ | {
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"So here's the thing:\n\nTemperature is caused by how much energy atoms have. Atoms like to move, but since they're so small you generally don't see it. The more they move the hotter they are.\n\nIf they reach a certain temperature they break atom... | [] | [] | [
[]
] | |
3tg91t | why do hotter things cool down quicker? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3tg91t/eli5why_do_hotter_things_cool_down_quicker/ | {
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"text": [
"The molecules of the cooling surface transfer heat to the surrounding air molecules by colliding with them. When t... | [] | [] | [
[],
[],
[],
[
"http://www.iflscience.com/chemistry/hot-water-freezes-faster-cold-and-now-we-know"
],
[],
[],
[]
] | ||
5w2d1z | why do we need e-mails to register an account on another website | Back then (like more than 10 years ago) - our details in our emails wasn't verified anyway. And I remember no one among my circle of friends put real details into registering their email. Anyone can make a duplicate emails and almost everyone I know (we were kids) use some pseudo cool name to register.
Nowadays - who ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5w2d1z/eli5why_do_we_need_emails_to_register_an_account/ | {
"a_id": [
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"text": [
"In case you forget your password, then they can send an activation code for you in case you request a password reset. Or to sell your information to a third party."
]
} | [] | [] | [
[]
] | |
68zqb8 | why does tensing your legs help you reach orgasm? | E: holy shit 6k upvotes.
E2: just a note, I did my search beforehand and apparently I didn't do it correctly. Move on.
E3: reposts should be considered on a case by case basis. Or somehow allow archive posts to be marked active again or at least commentable. New information can be discovered by simple conversatio... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/68zqb8/eli5_why_does_tensing_your_legs_help_you_reach/ | {
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"dh2v7td",
"dh2xiso",
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"dh2y1us",
"dh2y8vw",
"d... | [] | [] | [
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"https://www.reddit.com/r/explainlikeimfive/comments/2p4jnj/eli5_why_does_tensing_my_leg_muscles_help_me_to/"
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3duom9 | why do house lizards stay stationary for long periods of time? what's going through their head? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3duom9/eli5_why_do_house_lizards_stay_stationary_for/ | {
"a_id": [
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"text": [
"Reptiles are cold blooded which means they can't produce their own body heat. In turn, they rely on external heat sources like the sun or a rock heated by the sun, to keep up their body temp. If they start to get cold, they'll become more slugg... | [] | [] | [
[]
] | ||
12xbhj | What was the etiquette for riding horses in cities? | For thousands of years people used horses as their primary means of transportation. What was the etiquette for riding horses in cities? Did they have to stay in the streets or could they walk around on the sidewalks? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/12xbhj/what_was_the_etiquette_for_riding_horses_in_cities/ | {
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"text": [
"You can't ride into St. Peters Basilica unless you're a Knight of the [Order of St. Sylvester](_URL_0_), an Order that is awarded by the Pope.\n\nHere in Germany it is said that ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Order_of_St._Sylvester",
"http://en.wikipedia.org/wiki/Order_of_the_Golden_Spur",
"http://en.wikipedia.org/wiki/Konrad_Adenauer"
],
[],
[],
[
"http://books.google.com/books?id=-QXhVgYITTIC"
]
] | |
7wgi8k | Does the salt put down on roads affect the salinity of surrounding water courses? | As per title. Just wondered as I watch the salt being put down. | askscience | https://www.reddit.com/r/askscience/comments/7wgi8k/does_the_salt_put_down_on_roads_affect_the/ | {
"a_id": [
"du13wlq"
],
"score": [
7
],
"text": [
"Yes it does. Here is a good explanation. \n\n_URL_0_"
]
} | [] | [] | [
[
"https://www.sciencedaily.com/releases/2009/02/090210125424.htm"
]
] | |
rgccy | Carbon-dioxide is important for tree growth, but how much more important is it than the nutrients in the soil? | Could I, in theory, produce super plants by pumping CO2 into an airtight greenhouse? | askscience | http://www.reddit.com/r/askscience/comments/rgccy/carbondioxide_is_important_for_tree_growth_but/ | {
"a_id": [
"c45lhj3"
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"score": [
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"text": [
"So, carbon dioxide is used to create glucose, which the plant uses as an energy source and to create starch, but just like you can't survive on glucose alone, neither can a plant. Plants need those nutrients to build structures that are made up o... | [] | [] | [
[]
] | |
1n5unp | pharmaceutical terminology, purposes/functions, brand names etc. | Or maybe a more apt title would be **"Buying pharmaceuticals 101"**...
Growing up with the NHS I've never really been exposed to the stuff that seems second nature to Americans. If I get ill I either get some stuff at the supermarket or go to the doctor's who will prescribe something and will get filled out by the lo... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1n5unp/eli5_pharmaceutical_terminology_purposesfunctions/ | {
"a_id": [
"ccfnye7",
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"score": [
2,
2
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"text": [
"Brand name drugs are drugs that are produced under a brand name given to the drug by the inventor. Lipitor, Valium, Xanax, etc. are examples of brand names.\n\nWhen a drug first hits the market, it is protected by patents, s... | [] | [] | [
[],
[]
] | |
5r53o0 | why do people's eyes get small/ squinty when they smoke weed? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5r53o0/eli5_why_do_peoples_eyes_get_small_squinty_when/ | {
"a_id": [
"dd4lw2c",
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"score": [
7,
2
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"text": [
"Decreased blood pressure. In the eyes, a dilation of the ocular capillaries occurs, encouraging the blood flow through the eyes and effectively causing red eyes. ",
"Before I ever got high I used to laugh at one of my fr... | [] | [] | [
[],
[]
] | ||
lopv6 | If light is made of alternating electric and magnetic fields, why can neither and electric nor a magnetic field interact with light? | *What I know*:
Most of this: _URL_0_
*What I want to know*:
Why can't the path of a ray of light be deflected by a magnetic/electric field in the same
way that the path of a moving electron can?
Why don't the magnetic and electric fields form a vector sum of the external fields and
the fields of the light ray?
... | askscience | http://www.reddit.com/r/askscience/comments/lopv6/if_light_is_made_of_alternating_electric_and/ | {
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"text": [
"Electric and magnetic fields can only apply a force to charged particles, and as photons have no net charge, they will not be deflected by EM fields. \n\nElectric fields and magnet... | [] | [
"http://hyperphysics.phy-astr.gsu.edu/hbase/ligcon.html"
] | [
[
"http://en.wikipedia.org/wiki/Radio_antenna",
"http://en.wikipedia.org/wiki/Superposition_principle"
],
[],
[
"http://en.wikipedia.org/wiki/Radio_antenna",
"http://en.wikipedia.org/wiki/Superposition_principle"
],
[]
] | |
1afhlp | Misconceptions on Historical Warfare | I have been interested in the separation between conceptions and reality on warfare. I'm asking here because I don't know of any subreddit dedicated to battle questions. I feel that its likely some of you have participated in mock battles, as such your experience here will shine through.
* How long does the edge on a ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1afhlp/misconceptions_on_historical_warfare/ | {
"a_id": [
"c8wybzm"
],
"score": [
2
],
"text": [
"I'm thinking your question will get more attention if you place it in a particular period. \"Historical\" is a big time period. ;-) \n\nI'm curious about this as well, in particular how communication took place over large distances. I assume ... | [] | [
"http://en.wikipedia.org/wiki/Glaive",
"http://en.wikipedia.org/wiki/Shuriken",
"http://en.wikipedia.org/wiki/Chakram"
] | [
[]
] |
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