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8kxme6 | What population density could t-rex realistically have had? | askscience | https://www.reddit.com/r/askscience/comments/8kxme6/what_population_density_could_trex_realistically/ | {
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1hvbyk | why do some people cry during sex? is it biological or psychological? both? are there performance or dysfunction related to crying during intercourse? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1hvbyk/eli5_why_do_some_people_cry_during_sex_is_it/ | {
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1nbyhw | who owns the united states federal reserve? if it is the government, explain why we need to pay interest on the created money? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1nbyhw/eli5_who_owns_the_united_states_federal_reserve/ | {
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"The Federal Reserve doesn't really have an owner. The leadership is appointed by the government, but the government doesn't claim any ownership rights over the organization or its stuff. \n\nWhy do we d... | [] | [] | [
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"http://money.cnn.com/2012/03/20/news/economy/federal_reserve_profit/index.htm"
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sodii | why fight to have student loans forgiven? | I don't understand why a lot of people want student loans forgiven. Did the government trick students into taking out loans?
It doesn't make sense to me that someone would sign something saying they would borrow money and pay it back and then get upset they have to pay it back to the point where they frame the invest... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/sodii/eli5_why_fight_to_have_student_loans_forgiven/ | {
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"http://www.reddit.com/r/explainlikeimfive/comments/sodii/eli5_why_fight_to_have_student_loans_forgiven/c4ftf6e",
"http://www.cracked.com/blog/5-ways-we-ruined-occupy-wall-street-generatio... | [
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1u3rv9 | why does it feel good to sleep in the fetal position decade after being in the womb? | Why do some people continue to sleep in the fetal position decades after potentially developing new sleep habits? Speaking on a personal note, I love to sleep on my side with my arms crossed in an X with my legs curled up (preferably pressed against my SO) with my feet crossed as well. I understand that our vital organ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1u3rv9/eli5why_does_it_feel_good_to_sleep_in_the_fetal/ | {
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"text": [
"It's a psychological thing; regression. The fetal position inside your mothers womb is a safe, warm time in your life so subconsciously you go back (regress) to that time of safety and so on.\n\nSource: 1 intro class of Psych last semester."
]
... | [] | [] | [
[]
] | |
2kj389 | [Physics] Why can I hit a tennis ball pretty far with minimal effort, but I have to work a lot harder to throw it the same? | I was playing tennis earlier today, and was thinking about how the fastest serve (overhead shot) in tennis was almost 50mph faster than the fastest baseball pitch. Why, even with the same kind of ball, is it so much easier to hit the ball than throw it? | askscience | http://www.reddit.com/r/askscience/comments/2kj389/physics_why_can_i_hit_a_tennis_ball_pretty_far/ | {
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"2 things going on here. \n\n1. Leverage. The longer the moment arm you use (tennis bat) the more force you can exert on the ball. Ball goes further.\n\n2. Tension. Tension of the strings in the bat make for a small ammount of elasticity which wor... | [] | [] | [
[]
] | |
6fvmcj | feeling weak while having a cold. what causes that? | Hello!
We all have had a cold. Sympthoms vary: sore throat, runny nose, raised temperature... and above all that "general weakness" affecting whole body. I have that right now without any other sympthoms (had them before though :D), and it got me thinking: what is my body doing now, when all other sympthoms are gone? ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6fvmcj/eli5_feeling_weak_while_having_a_cold_what_causes/ | {
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"Your body is spending so much energy on fighting the cold that it doesn't spare energy for much else. A proper immune response requires a bit of energy, and fighting infection becomes job 1 (aside from breathing, heart function, etc.). Your immun... | [] | [] | [
[]
] | |
628jaa | what causes photos of screens to look so bad? | Title, and also the way that the patterns can change when you zoom in and out of a photo | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/628jaa/eli5_what_causes_photos_of_screens_to_look_so_bad/ | {
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"It's called the moire effect.\n\nCameras have pixels, and those pixels are arranged in symmetric rectangular grids. Displays have pixels, also arranged in symmetric grids. When those grids perfectly align, the image is fin... | [] | [] | [
[],
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"https://en.m.wikipedia.org/wiki/Moiré_pattern"
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] | |
4686ex | how does the conservation of mass and energy, and the expansion of the universe correlate/allow for the other? | If matter and energy can not be destroyed or created, only changed, how do we explain the expansion of the universe? I understand things are getting more spread out, but something has to be occupying all that extra space, doesn't it? As far as I knew there's no such thing as nothing. All of space consists of somethi... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4686ex/eli5_how_does_the_conservation_of_mass_and_energy/ | {
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"You can have nothing. That's what a vacuum is, the absence of something. While space is not a perfect vacuum, it's pretty close. So as space expands, you get a bigger vacuum."
]
} | [] | [] | [
[]
] | |
1t4hsz | Are there any examples of a unit or part of an army effectively going rogue and that started doing their own thing? | I ask this because i'm playing a game called Spec Ops: The Line where there is a rogue battalion of the US army. It made me wonder are there an real examples of this happening throughout history? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1t4hsz/are_there_any_examples_of_a_unit_or_part_of_an/ | {
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"text": [
"There are many, many examples of this in Roman civilisation alone. Not to put too fine a point on it, but are you aware of Julius Caesar and [crossing the Rubicon](_URL_0_)?"
]
} | [] | [] | [
[
"http://www.eyewitnesstohistory.com/caesar.htm"
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] | |
28s8q6 | Rangers in history | Where there ever any rangers in history? Like Faramir and Aragorn from Lord of the Rings or Will and Halt from the Rangers Apprentice series. If you haven't heard of them basically they are exceptional archers that are superb at remaining unseen using there skills and a mottled green cloak, to be general. If there were... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/28s8q6/rangers_in_history/ | {
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"text": [
"Well, the archetypal form of those sorts of characters certainly existed. Tolkein, as a professor of English, was very aware of his influences and what he was drawing on. The later horde of fantasy authors ripping him off? Probably less so. \n\n... | [] | [] | [
[]
] | |
ayrbkw | When an animal is born with two fully functioning heads, how do their brains deliberate and balance control over the body? | askscience | https://www.reddit.com/r/askscience/comments/ayrbkw/when_an_animal_is_born_with_two_fully_functioning/ | {
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"Tried a quick google for some research but couldn’t find any. I assume it’s different from person to person. It would all depend on how their brains were connected to each other and the rest of the body I would assume"
]
} | [] | [] | [
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dyyww0 | cocaine | So I read the post "[ELI5 LSD](_URL_0_)" and I was curious so I searched for some other drugs on the subreddit. While searching for cocaine I didn't really find a good explanation like I did for the LSD thread.
So I am wondering... What is cocaine and what does it do to your brain when you take it, and also what h... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dyyww0/eli5_cocaine/ | {
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"Cocaine basically causes loads of a chemical called dopamine to be produced and this chemical is normal produced in small amounts that then produces a signal that is turned into an action the amount of dopamine affects how b... | [] | [
"https://www.reddit.com/r/explainlikeimfive/comments/dymtnq/eli5_lsd/"
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[],
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2nsj3u | why is it that mac operating systems rarely need to be updated yet windows seemingly needs to be updated every few days? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2nsj3u/eli5_why_is_it_that_mac_operating_systems_rarely/ | {
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"OS X does need to be updated~~graded~~ fairly often. The thing is, Apple makes it a fairly seamless process. Rarely does an update require a restart, for instance, while Windows updates tend to be very intrusive. If you select autoupdate for both... | [] | [] | [
[]
] | ||
cms57p | Why are batteries arrays made with cylindrical batteries rather than square prisms so they can pack even better? | askscience | https://www.reddit.com/r/askscience/comments/cms57p/why_are_batteries_arrays_made_with_cylindrical/ | {
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"First of all, some packs are made with prismatic cells. The pr... | [] | [] | [
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5raunu | Were more artillery shells fired in WWII or WWI per capita? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5raunu/were_more_artillery_shells_fired_in_wwii_or_wwi/ | {
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"text": [
"per capita what? Per artilleryman? Per frontline infantryman? Per European population?"
]
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[]
] | ||
5fr7ox | what causes naturally "good" or "bad" memory retention in a person and why is there a difference? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5fr7ox/eli5_what_causes_naturally_good_or_bad_memory/ | {
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"Since you're talking about memory retention, I'm going to skip over short-term memory, which naturally decays.\n\nTo start, the idea of having a *perfect* memory is a bit of a lie. It's totally normal to not remember every little detail. Memory i... | [] | [] | [
[]
] | ||
2qvrf5 | Why do we have primary colours? | I posted this originally in AskReddit. I was sent here.
I'm sorry for asking so many questions at once. It started with only a few but I kept going. Thanks for any help towards the answers.
Light is just a certain frequency range of the EM spectrum.
Why can it be split up into distinct colours in a prism?
What make... | askscience | http://www.reddit.com/r/askscience/comments/2qvrf5/why_do_we_have_primary_colours/ | {
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" > Why can it be split up into distinct colours in a prism?\n\nWhen light crosses a material boundary it is def... | [] | [] | [
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3kni3n | Back in the days when people believed witchcraft was a real thing and prosecuted people for being witches, how could they on one hand believe in malevolent magic and yet believe they could arrest, imprison and execute a "witch" and the witch would not escape/take revenge with their magic? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3kni3n/back_in_the_days_when_people_believed_witchcraft/ | {
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"The answer lies in our conception of magic. To most people in the modern world the first image that comes to mind is Harry Potter making things fly around... | [] | [] | [
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"https://books.google.com/books?id=LngTuKdHLiIC"
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1luxq8 | how do they decide, during sports broadcasts that vary in length, which ads to play? | I was thinking of this last night during the Broncos/Ravens NFL game. The game started 1/2 late, yet they had plenty of ads to play.
Do the companies buying ads have the option to be played only if there is extra time? Are there companies that pay for particular spots of the game, like right before kick-off? Are there... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1luxq8/eli5how_do_they_decide_during_sports_broadcasts/ | {
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"They buy ads based on when they show in the game, not for a specific time. So I may set up a deal with them for an ad at the end of the first and third quarters, plus a commercial for halftime. \n\n",
"First of all as ... | [] | [] | [
[],
[]
] | |
bk6z5l | Did medieval knights lift? | Is strength training a modern phenomenon, or have people who wanted to become strong always picked up and put down heavy things over and over? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/bk6z5l/did_medieval_knights_lift/ | {
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"I highly recommend [this thread](_URL_1_) by /u/knight117 and [this one](_URL_0_) by /u/kardlonoc which both deal with the question you ask. \n\n & #x200B;\n\nThe TL;DR is \"sort of\". They trained but primarily in a more ... | [] | [] | [
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"https://www.reddit.com/r/AskHistorians/comments/2h2kwv/did_medieval_exercise_include_pushups_or_situps/",
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"http://www.thearma.org/essays/fit/RennFit.htm"
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3jyrmd | what mass an object should have so objects start orbiting it? | Or the correct question would be: what mass should an object have to create a gravity?
UPD: I have additional stupid questions from me:
1. In theory, if to an object add some speed in the space, will it move the same speed for ever (if its not affected by gravity from any other planet).
2. Does the speed of radio wa... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3jyrmd/eli5what_mass_an_object_should_have_so_objects/ | {
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"Any object that has mass has a gravitational field. You have a gravitational field. A feather has a gravitational field. Those fields are, however, extremely weak.\n\nYou could in theory, have an object orbiting around you, ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Hill_sphere"
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[]
] | |
54vs81 | why are all cells considered to be living structures? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/54vs81/eli5_why_are_all_cells_considered_to_be_living/ | {
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"text": [
"The cells have all the traits we associate with living things. They eat food, they procreate etc. The cells in the human body isn't all that different from the cells of single cell organisms."
]
} | [] | [] | [
[]
] | ||
1ubluu | what happens to people in colorado who were already convicted of marijuana - related offenses? | What happens to people who were convicted of something that is no longer illegal?
EDIT: thanks for the quick replies! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ubluu/eli5_what_happens_to_people_in_colorado_who_were/ | {
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... | [] | [] | [
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9e1vxu | this siphon water experiment | Hey can someone break down this experiment? _URL_0_
I understand that this is a siphon, but whats the point of using the water bottle that is filled with a bit of water? Also what forces are causing the water to be able to move from the higher cup to the lower cup and not stay inside the bottle? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9e1vxu/eli5_this_siphon_water_experiment/ | {
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"The force causing the movement of the water is pressure and gravity. \n\nwhen you suck on a straw, you are creating a low pressure area in your mouth, this causes whatever you are trying to drink to flow through that straw,... | [] | [
"https://www.youtube.com/watch?v=pf33oquDddw"
] | [
[
"https://youtu.be/viJ3T-1KZqY"
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[]
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2h2tim | what is the definition of life? | Like how is it different from that thing it was right before it mutated into life? And do we know how this happened already? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2h2tim/eli5what_is_the_definition_of_life/ | {
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"All known life has a few things in common, organisms (things that are alive) have these in common: they're composed of a cell or cells, undergo metabolism, maintain homeostasis, grow, respond to stimuli, and reproduce. There are a few things that... | [] | [] | [
[]
] | |
pe9h9 | category theory. | A friend of mine is teaching himself category theory and tried to explain it to me, but he's much further ahead of me. Is it possible to understand it without much formal education in higher maths (I have some background in Multivar Calculus, basic linear algebra, basic real analysis, basic set theory)? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/pe9h9/eli5_category_theory/ | {
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"First, let's start with a couple of examples of what math subjects are like.\n\nIn Real Analysis, we start with some set of Real numbers and first we learn some stuff about them. After we know some of their properties, we then look at functions f... | [] | [] | [
[]
] | |
2lr27z | what is/are the difference/s between the arabic, turkish and persian people? | I know it's similar to how Japanese aren't Korean and Serbians aren't Croation,I tried finding more info but every piece of info is biased. Can someone elaborate more on this info, social, cultural, geneology etc perhaps including famous empires of each race/culture and famous contributions/people | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2lr27z/eli5_what_isare_the_differences_between_the/ | {
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"text": [
"All of them have a different language.\n\nArabic and Persians are very much oriental people, Turks are more \"western\".\n\nArabic and Persians ancestors always seems to be in the place they live now.Turkish people ancestor... | [] | [] | [
[],
[]
] | |
3m8w7q | Would we really have made more scientific progress today if it where not for the decline of the roman empire and the dark ages? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3m8w7q/would_we_really_have_made_more_scientific/ | {
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"For one, the Roman Empire was actually not a very innovative entity. There are a few pieces of advanced technology like concrete which would not be re-discovered until after the renaissance but for the most part the Empire was simply good at ach... | [] | [] | [
[]
] | |
1iyf4t | why are black holes not infinitely bright? | If a black hole has already consumed all nearby matter and is not changing in size, wouldn't there be an angle at which incoming photons would get permanently caught in orbit? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1iyf4t/eli5_why_are_black_holes_not_infinitely_bright/ | {
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"text": [
"If the photon is permanently caught, it cannot make it to your eye.",
"I'll try to clarify what I think is the main point of confusion:\n\nPhotons are not bright in the sense that you can see one flying past you. The *... | [] | [] | [
[],
[]
] | |
6xeuh3 | How much does drinking a cold drink really affect your body temperature? | askscience | https://www.reddit.com/r/askscience/comments/6xeuh3/how_much_does_drinking_a_cold_drink_really_affect/ | {
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... | [] | [] | [
[],
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[],
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"http://www.popsci.com/does-drinking-hot-liquids-cool-you-off#page-3"
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"http://www.quakeroats.com/products/rice-snacks/rice-cakes/salt-free.aspx"
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[],
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"https://books.google.com/books?id=_McpDwAA... | ||
h2lqn | Is it possible to develop astigmatism over time? | I have been told since I was 12 that I was near-sighted, and I've had a handful of eye exams since then. My vision isn't that bad.. I think I recall being -2.5. I can't read the numbers on the latest prescription that was just given to me (silly doctors.. with their writing). Anyway, this entire time, nobody has said a... | askscience | http://www.reddit.com/r/askscience/comments/h2lqn/is_it_possible_to_develop_astigmatism_over_time/ | {
"a_id": [
"c1s4xlw"
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"text": [
"My optometrist has informed me that in more serious cases of myopia, astigmatism usually develops. I myself are about -10 and -11 for myopia, and has astigmatism (although I forgot the axes figures).\n\nThe cause of either disease has never been ... | [] | [] | [
[]
] | |
mos2i | Can you recommend resources that can be used to teach the Enlightenment to high school students? | I am in a credentialing program to become a history teacher, and I am putting together a unit plan for the Age of Enlightenment as a final project for a class. The unit will be about 3 weeks long for a high school class. What are some good documents, preferably short (high school, though can be longer if you could re... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/mos2i/can_you_recommend_resources_that_can_be_used_to/ | {
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"text": [
"It depends on how far you wish to go with the ideas. The ideas of Francis Bacon certainly weren't new to Europe, and he really didn't ha... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
4sgdae | When hate crime laws are passed do they actually reduce the occurrence of that type of crime, or have virtually zero effect on the suspect's motivation to commit the crime? | askscience | https://www.reddit.com/r/askscience/comments/4sgdae/when_hate_crime_laws_are_passed_do_they_actually/ | {
"a_id": [
"d59kfb1"
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"text": [
"I think it just affects the punishment mostly, which in turn would affect the occurrences. \n\n It's not only to deter hate crimes, but that a hate crime is punished differently and perceived differently. They've found that hate crimes, or biased... | [] | [] | [
[]
] | ||
1yddbe | I'm a young Macedonian man in the Hellenic period. Why would I follow Alexander the Great to the edge of the known world knowing that death was certain? What was life like for me during Alexander's conquests? | *Clarification*: Hellenic period should be Hellenistic Period | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1yddbe/im_a_young_macedonian_man_in_the_hellenic_period/ | {
"a_id": [
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"score": [
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35
],
"text": [
"This is a great question and a fascinating one. It's always difficult to tell what the average person's life was like in antiquity. If you ever study Alexander's life in depth, you'll run into many unanswered questions an... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Companion_cavalry",
"http://www.petersommer.com/travel-writing/alexander-the-great-travel-article/",
"http://books.google.com/books?id=OiMWqRokCZ4C&pg=PA24&lpg=PA24&dq=alexander+the+great+average+soldier&source=bl&ots=mhOgLzEmRR&sig=4wDkMY4yCakAv9U... | |
2vshz3 | how is my brain able to go into this zoned-out "auto-pilot" state while i'm driving, yet i get to my destination safety with no real recollection of the trip? | I'm obviously not veering all over the place or putting anyone else in danger. It's like my brain goes into it's own cruise control. What is actually going on when this happens? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2vshz3/eli5_how_is_my_brain_able_to_go_into_this/ | {
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"c... | [] | [] | [
[],
[
"http://cogsci.stackexchange.com/questions/544/running-on-autopilot"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
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"http://www.scientificamerican.com/article/what-is-the-function-of-t-1997-12-22/"
],
[],
[],
[],
[
"http://www.drnowell.com/blog/2013/01/27/Q-... | |
6hnp9r | why isn't herbalife illegal company | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6hnp9r/eli5_why_isnt_herbalife_illegal_company/ | {
"a_id": [
"dizozk8"
],
"score": [
6
],
"text": [
"Because it actually offers real products for sale whereas, pyramid schemes do not according to the US FTC (Federal Trade Commission). Therefore, it is categorized in the MLM (multi-level marketing) organizational category, which is a legal busine... | [] | [] | [
[]
] | ||
59fyyi | How does the temperature of colder planets core relate to warmer planets core closer to closer to the sun? | askscience | https://www.reddit.com/r/askscience/comments/59fyyi/how_does_the_temperature_of_colder_planets_core/ | {
"a_id": [
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2,
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"text": [
"The temperature of the core of a planet will depend on several factors: leftover heat from formation of the planet, heat generated through mechanisms like friction and radioactive decay, mass of the pla... | [] | [] | [
[],
[],
[]
] | ||
3jqfjx | the difference between the german chancellor and the president of germany | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3jqfjx/eli5_the_difference_between_the_german_chancellor/ | {
"a_id": [
"curfd1l"
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"score": [
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],
"text": [
"The President is the head of state; the chancellor is the head of the government. The head of state refers to a largely ceremonial role -- that's the person who meets other countries' diplomats and royalty, attends non-policy-related diplomatic ... | [] | [] | [
[]
] | ||
d7nap7 | why can't we live just off of sunlight energy? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d7nap7/eli5_why_cant_we_live_just_off_of_sunlight_energy/ | {
"a_id": [
"f12g652",
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"score": [
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2
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"text": [
"Biologically? Even plants can't live off sunlight alone, and they sit around all day. They still need essential nutrients and water from the soil, despite the fact that they don't move.\n\nCold-blooded animals (like reptile... | [] | [] | [
[],
[]
] | ||
4e1eow | What are the factors affecting pressure in a pipe? | I want to investigate how the following factors can affect EITHER volumetric flow rate OR pressure OR K.E. energy loss.
My aim is to choose one of the combinations which will allow me to gather a lot of data, and thus analyse using Bernoulli's principle, Hagen–Poiseuille equation?
- Angle of bend
- Shape of outlet ... | askscience | https://www.reddit.com/r/askscience/comments/4e1eow/what_are_the_factors_affecting_pressure_in_a_pipe/ | {
"a_id": [
"d1wf27q"
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"score": [
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"text": [
"So is this like a high school (college) project? \n\nFlow rate you can easily measure using a bucket and a stop watch; just wait a certain amount of time (60 seconds or whatever), then weigh the water that you've collected (or determine its volum... | [] | [
"https://drive.google.com/file/d/0B55SLbVVgR4XNXJ5YnN4bEpoOG8/view?usp=sharing"
] | [
[
"https://neutrium.net/fluid_flow/pressure-loss-in-pipe/",
"https://en.wikipedia.org/wiki/Hydraulic_analogy",
"http://www.mycheme.com/calculating-pressure-drops-in-pipe-fittings/",
"https://neutrium.net/fluid_flow/pressure-loss-from-fittings-equivalent-length-method/"
]
] | |
f2bhbh | the way i understand aging, is that cells make a slightly less perfect copy of its predecessor each time until its eventually “no good” and we just fall apart and die, if we could find a way to make cells reproduce or clone perfectly, would we be able to live forever? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f2bhbh/eli5_the_way_i_understand_aging_is_that_cells/ | {
"a_id": [
"fhbgp44"
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"score": [
2
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"text": [
"That's just part of it. Aging is a complicated process with several factors at play. The ends of each chromsome, called telomeres, gets degraded progressively each time the cell divides. Eventually the degradation gets to the actual sequence you ... | [] | [] | [
[]
] | ||
69emit | What impact does a tsunami have on ships at sea? | Hello r/askscience.
How much would a big ocean-going vessel (say, a US navy Nimitz-class aircraft carrier) notice a tsunami in the middle of an open ocean, thousands of miles from shore?
Would it be a destructive wall of water moving rapidly towards the ship, or would merely be a (un)noticable rise of the water lev... | askscience | https://www.reddit.com/r/askscience/comments/69emit/what_impact_does_a_tsunami_have_on_ships_at_sea/ | {
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... | [] | [] | [
[],
[],
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"https://www.youtube.com/watch?v=OdhfV-8dbCE"
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[
"https://nhmu.utah.edu/sites/default/files/attachments/All%20About%20Tsunamis.pdf"
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[],
[],
[],
[
"http://www.sitnews.us/Kiffer/LituyaBay/070808_lituya_bay.html"
],
[
"https://www.youtube.com/watch?v=-Vc... | |
ch7r9y | is there a radio frequency camera? | I just wondered if you could built a cameralike device to view radio frequency emmiting objects. Lets say in the 2,4 GHz range like wifi antennas.
I mean you could take a directional antenna and scan across the view like a radar. Or maybe use a grid of antennas and interference like Radiotelescopes do. But is there ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ch7r9y/eli5_is_there_a_radio_frequency_camera/ | {
"a_id": [
"euq7ouz",
"euqmel2"
],
"score": [
5,
5
],
"text": [
"Yes, a radiotelescope is such a device.",
"Yes, but the resolution is limited by the wavelength. Radio telescopes use multiple dishes and interferometry for increasing resolution, but they need to scan just like single d... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Focal-plane_array_(radio_astronomy\\)"
]
] | |
8tlxuy | Can microbes ever become UV Resistant? Why or why not? | askscience | https://www.reddit.com/r/askscience/comments/8tlxuy/can_microbes_ever_become_uv_resistant_why_or_why/ | {
"a_id": [
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"text": [
"It’s very possible over time the microbes in question will evolve to be more UV-resilient by upregulating enzymes associated with repairing UV-induced damage (for example, base excision repair). But there’s a limit to even the most efficient repa... | [] | [] | [
[]
] | ||
6sm2a8 | why college football schools needs that large stadiums (90k+ attendance)? | Univeristies plays about 6-8 home games at home during football seasons. Some of the stadiums hosts football games from high schools or bowl ganes - but the other big ones? For 8-9 months - that large stadiums generate costs. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6sm2a8/eli5_why_college_football_schools_needs_that/ | {
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"text": [
"Because each of those games brings in a ridiculous amount of money, and there aren't very many costs associated with the stadiums when they're not in use. The... | [] | [] | [
[],
[],
[],
[],
[]
] | |
8e4cfj | why do sound deviations from “normal sounds” like those used in horror movies and games cause a fear response in us? | Thinking of A Quiet Place and Doki Doki Literature Club; not just predator noises and such | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8e4cfj/eli5_why_do_sound_deviations_from_normal_sounds/ | {
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7,
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65,
4,
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"text": [
"Do you notice how they’re always minor?",
"I think i read an evolutional theory about this a long time ago. Something about sounds... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
6shlmz | the psychological reason people can still not believe an argument when presented with evidence. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6shlmz/eli5_the_psychological_reason_people_can_still/ | {
"a_id": [
"dld8y9b",
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"score": [
2,
3
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"text": [
"It's because one person's irrefutable evidence, is total bullshit to someone else. Evidence is subjective. When you say something is a fact, how often is it that you do not really know that for a fact. You are relying on \"s... | [] | [] | [
[],
[]
] | ||
7op85x | why is seafood much more fragrant/smelly than land based animals? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7op85x/eli5_why_is_seafood_much_more_fragrantsmelly_than/ | {
"a_id": [
"dsb9k4m"
],
"score": [
6
],
"text": [
"Trimethylamine oxide. It's odorless, but after you kill the fish bacteria break it down into ammonia. "
]
} | [] | [] | [
[]
] | ||
3gc1u6 | why does faraway smoke look like it's staying still? | For example, the steam coming out of cooling towers always looks static, as does smoke from a fire that you aren't close to. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3gc1u6/eli5_why_does_faraway_smoke_look_like_its_staying/ | {
"a_id": [
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"score": [
2,
2
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"text": [
"The same reason airplanes look very slow. A plane flying 400 mph looks like its crawling along because its so far away. Smoke rising a mile away is only going, I dunno, ten miles per hour, so it looks completely still becaus... | [] | [] | [
[],
[]
] | |
1s2e95 | What are the earliest accounts of 'roleplaying'? I assume children always played pretend but what did adults have any kind of pseudo-D & D in the past? When did these hobbies start to become 'a thing', basically? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1s2e95/what_are_the_earliest_accounts_of_roleplaying_i/ | {
"a_id": [
"cdtb59e",
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"score": [
23,
10
],
"text": [
"Having asked my colleagues at #Twitterstorians, they suggested the following piece, which should answer your question.\n\n_URL_0_",
"War reenactment was an early sort of 'roleplaying', where people dress in the uniform... | [] | [] | [
[
"http://www.robmacdougall.org/blog/2007/05/dungeon-master-zero/"
],
[
"http://en.wikipedia.org/wiki/American_Civil_War_reenactment",
"http://en.wikipedia.org/wiki/The_Sealed_Knot_(reenactment)"
]
] | ||
6ode2m | how do it departments handle frequent cyber attacks? | Context: the director of my organization's IT department mentioned in a presentation that we encounter hundreds of cyber attacks every week (this organization is well-known globally). How is it possible that we are attacked so frequently and how do the IT folks handle it? I know nothing about CS. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ode2m/eli5_how_do_it_departments_handle_frequent_cyber/ | {
"a_id": [
"dkgk8ag"
],
"score": [
6
],
"text": [
"Almost any publically accessible IP address is constantly bombarded by various attacks and scans. At home your router most likely protects you from a direct assault on your home computers by forbidding direct connections unless you've explicitly ... | [] | [] | [
[]
] | |
3aj7el | Does special relativity apply to circular velocity? | Does there exist time dilation between the earth's equator and the earth's poles? | askscience | http://www.reddit.com/r/askscience/comments/3aj7el/does_special_relativity_apply_to_circular_velocity/ | {
"a_id": [
"csdceoy",
"csddno5"
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"score": [
6,
2
],
"text": [
"I misread your question, there is not a time dilation effect between the Earth's pole and equator. While pure circular motion should induce such dilation, the special relativistic and general relativistic contributions cance... | [] | [] | [
[
"http://physics.stackexchange.com/a/126932",
"https://en.wikipedia.org/wiki/Ehrenfest_paradox"
],
[
"https://en.wikipedia.org/wiki/Hafele%E2%80%93Keating_experiment"
]
] | |
7x15fv | shouldnt we burn a lot of calories when eating ice cream because our body works to raise the temperature of the ice cream? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7x15fv/eli5_shouldnt_we_burn_a_lot_of_calories_when/ | {
"a_id": [
"du4n45n"
],
"score": [
5
],
"text": [
"We do burn calories when eating cold food - it takes energy to keep the body warm, and to counteract the effects of cold food - but it doesn't take that to heat up a few scoops of ice cream, especially compared to the calories you take in by eati... | [] | [] | [
[]
] | ||
1rlfaw | the moral and ethical implications of genetically modifying people | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rlfaw/eli5_the_moral_and_ethical_implications_of/ | {
"a_id": [
"cdoesf1",
"cdoksd9"
],
"score": [
3,
4
],
"text": [
"Glad there are some people out there who care. In my undergraduate degree in Biochemistry & Molecular Biology there was no bioethics course taught. We spent only one lecture in my course on Proteins touching on this subjec... | [] | [] | [
[],
[]
] | ||
392cds | why are untruthful political ads still protected under the first amendment while ads that lie about consumer products are not? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/392cds/eli5_why_are_untruthful_political_ads_still/ | {
"a_id": [
"crzrwwb",
"crzsr6x"
],
"score": [
6,
2
],
"text": [
"Most political ads are misleading, not fraudulent. They are careful not to say things which are demonstratively and objectively untrue. ",
"Well, both are protected by the First Amendment, just to varying degrees, and bo... | [] | [] | [
[],
[]
] | ||
2je13o | in the wolf of wall street, what did they do involving the steve madden stock that was illegal and how did it make them so much money? | I thought it was because they bought lots of the stock at a low price, sold lots to customers therefore inflating the price and then selling their shares and the new higher price. However later in the film Jordan states he still owns 85% | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2je13o/eli5_in_the_wolf_of_wall_street_what_did_they_do/ | {
"a_id": [
"clau9pr"
],
"score": [
4
],
"text": [
"It was a \"pump and dump\" scheme. Buy up a company that is doing terribly, talk it up like it is doing wonderfully along with faking your income reports, then sell off some shares while everyone thinks it is hot stuff. Then vanish with your gain... | [] | [] | [
[]
] | |
1su3td | why are some colour combinations painful to look at when placed alongside each other (eg. red and green?) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1su3td/eli5_why_are_some_colour_combinations_painful_to/ | {
"a_id": [
"ce18mxn"
],
"score": [
2
],
"text": [
"_URL_0_\n\nThis kicks me right in the eye-nuts."
]
} | [] | [] | [
[
"http://static.fjcdn.com/pictures/Painful_7aa431_1008344.jpg"
]
] | ||
31ixlh | how does a knife work on a molecular level? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/31ixlh/eli5_how_does_a_knife_work_on_a_molecular_level/ | {
"a_id": [
"cq1zdlu",
"cq1zdyc"
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"score": [
3,
2
],
"text": [
"It doesn't. Knives work on the micrometer level, either tearing out tiny chunks of the material, like a saw, or forcing themselves into, and then forcing open, gaps in it, like a wedge.\n\nThose chunks that are torn out, or ... | [] | [] | [
[],
[]
] | ||
1uc1xc | How did "...berg" and "...stein" become Jewish last name suffixes? It seems like they should be universal names for Eastern Europeans. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1uc1xc/how_did_berg_and_stein_become_jewish_last_name/ | {
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"cegls48",
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22,
152,
2,
2,
2,
2
],
"text": [
"Jewish names can be patronymic, matronymic , occupation or place names, or even chosen for their cadence! for example:\n\n**Patronym... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/1782_Edict_of_Tolerance",
"http://sh1.webring.com/people/bt/touviagoldstein/documents.html",
"https://en.wikipedia.org/wiki/Heinrich_Friedrich_Karl_vom_und_zum_Stein"
],
[],
[
"http://books.google.fr/books?id=4LssAAAAYAAJ&printsec=frontcover#v=onepage... | ||
2y51o6 | traditionally, why do conservatives support israel while liberals do not support israel? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2y51o6/eli5_traditionally_why_do_conservatives_support/ | {
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4,
3
],
"text": [
"Both parties in the US support israel. At this moment, however, we've got political gamesmanship. The GOP invited a foreign leader to speak to Congress in an... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Team_B"
],
[],
[]
] | ||
2bpzr8 | flat personal tax/consumption tax. | Here's my thinking. The tax code (in the US but I'm sure other countries have similar problems) is SO complex that a million loop holes exist. If the tax were changed to twenty pages of simple layman's jargon these holes would be closed. The economic drain that occurs as a necessity of employing so many people as tax p... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2bpzr8/eli5_flat_personal_taxconsumption_tax/ | {
"a_id": [
"cj7r7o4"
],
"score": [
4
],
"text": [
"A flat tax is inherently regressive, and puts more of a burden on the people who can least afford it.\n\nA consumption tax is even worse, because the people who can most afford to be taxed also spend the lowest percentage of their income on essen... | [] | [] | [
[]
] | |
5ekwie | why is audio/voice quality so bad between crucial communication lines (soldiers/police/pilots etc.) | Why in 2016 is the quality still so bad? It's like they're using happy meal toys. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ekwie/eli5_why_is_audiovoice_quality_so_bad_between/ | {
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"score": [
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16,
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"text": [
"Oftentimes the audio quality is fine, but when they record it, they use a very low bitrate, which makes it sound junky. They do that to save space, obviously. And for 99.99999... | [] | [] | [
[],
[],
[],
[]
] | |
24dgze | what is a high functioning alcoholic and what is the problem with that? | The term "High Functioning Alcoholic" seems to be meaningless to me. Reading the literature it states that an HFA has
* The ability to be professional
* The ability to maintain and create relationships
* Does not display any signs of struggle in their life
* Has not gotten into trouble due to alcohol
Yet, they're sti... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/24dgze/eli5what_is_a_high_functioning_alcoholic_and_what/ | {
"a_id": [
"ch617zj",
"ch61ayp",
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"score": [
10,
2,
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"text": [
"(1) They are doing a lot of damage to their liver and physical health in general - which is entirely their choice and right.\n(2) They may have underlying psychological issues which they are very good ... | [] | [] | [
[],
[],
[]
] | |
49q2ua | what causes that feeling a split second before your realize you're about to have a very big accident? | Like when you're walking downstairs and miss one step and you're about to take a tumble, there is that fraction of a second where it feels like your heart is jumping into your throat?
I feel like whenever this happens I become way more alert than previously. Is there a natural way to reproduce this feeling with food ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/49q2ua/eli5what_causes_that_feeling_a_split_second/ | {
"a_id": [
"d0ttwfg"
],
"score": [
4
],
"text": [
"Its your fight or flight response.\n\nWhen you sense that you are in danger, your body releases a bunch of chemicals that prepare you to either fight the threat or run away from it. Your get more alert, stronger, faster and more coordinated to f... | [] | [] | [
[]
] | |
22axk7 | why is air less dense at higher altitudes? | This is probably a really dumb question so sorry in advance. I guess there are formulas which will explain this, but what properties of air make it less dense at a higher altitude? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22axk7/eli5_why_is_air_less_dense_at_higher_altitudes/ | {
"a_id": [
"cgl1c25"
],
"score": [
11
],
"text": [
"Imagine you stacked 100 cardboard boxes on top of each other. The one on the bottom would be crushed due to the weight of the other boxes on top of it. It being compressed would cause it to become denser than the other boxes above it. \n\nReplac... | [] | [] | [
[]
] | |
5xq62n | Why does North Korea have such few allies? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5xq62n/why_does_north_korea_have_such_few_allies/ | {
"a_id": [
"denik7n"
],
"score": [
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],
"text": [
"North and South Korea both claim to be the one true Korea with the other one being an illegitimate government. Historically, both sides have legitimate claims with Pyongyang and Kaeseong both being major capital cities of former dynasties during ... | [] | [] | [
[]
] | ||
2mbrvd | Can there be an object of sufficient mass that light would orbit the object due to gravitional lensing? | askscience | http://www.reddit.com/r/askscience/comments/2mbrvd/can_there_be_an_object_of_sufficient_mass_that/ | {
"a_id": [
"cm33twd"
],
"score": [
7
],
"text": [
"Yes. If an object with mass M has a radius less than 3GM/c^(2), [light can circle entirely around the object](_URL_0_). The density required for this is pretty extreme; it's limited mostly to black holes."
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Photon_sphere"
]
] | ||
5nas3e | Why do European monarchs almost always have adjectives applied to their names? (i.e. Louis "the Pious" of France) | Also, is it something that was added by historians after the fact, or were they generally given during a monarch's reign? (Presumably some, like Charles the Bald, wouldn't have liked this). | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5nas3e/why_do_european_monarchs_almost_always_have/ | {
"a_id": [
"dca4oie"
],
"score": [
2
],
"text": [
"For both Louis the Pious and his son Charles the Bald, these were both names by which they were known during their lifetimes. As for Charles' opinions on his nickname, we've no record of how he felt about it, but he might well have like it and fo... | [] | [] | [
[]
] | |
5ggx16 | why does american culture put so much emphasis on "moving out of the house" and being independent from one's family, when other cultures (e.g. asian and spanish) live with their extended family under the same roof throughout their lifetimes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ggx16/eli5_why_does_american_culture_put_so_much/ | {
"a_id": [
"das3yej",
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"das8xhm",
"das8xzr",
"d... | [] | [] | [
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[],
[],
[],
[],
[],
[],
[],
[
"https://en.m.wikipedia.org/wiki/Rugged_individualism"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
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[],
[],
[],
[],
[],
[
"http://brilliantmaps.com/wp-content/uploads/europe-living-with-parents.png"
],
[],
[]... | ||
3ce0ew | how comic distribution works? | I got into comics in 2013, and while I only keep up with two series (Mega Man and X-Men), I'm still really confused at how comics get released, just because I go to my local bookstore every so often instead of a comic book store (which I go to once every few months). I don't understand how back issues or rarity works e... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3ce0ew/eli5_how_comic_distribution_works/ | {
"a_id": [
"csuo6kc"
],
"score": [
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"text": [
"Most American comics are produced on a monthly basis, about 22 pages per month. These comics are published by a publisher (DC, Marvel, Dark Horse, Etc.) and then distributed by a company called Diamond, who pretty much have a monopoly on comic di... | [] | [] | [
[]
] | |
at3p9k | what causes the urge to move around after hurting yourself? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/at3p9k/eli5_what_causes_the_urge_to_move_around_after/ | {
"a_id": [
"egydkqm"
],
"score": [
11
],
"text": [
"You gotta run the pain off. For real, in the wild, if you get hurt, there's probably someone or something that hurt you and your body wants to get away from them asap so you don't sustain any more injuries. "
]
} | [] | [] | [
[]
] | ||
8gw1g2 | When the mars rover went to mars were they able to remove all bacteria and small life from it? If not could any of the bacteria be able to live in the harsh conditions of mars? And how do they obtain soil samples looking for bacteria if it could possibly be from the rover itself? | askscience | https://www.reddit.com/r/askscience/comments/8gw1g2/when_the_mars_rover_went_to_mars_were_they_able/ | {
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"score": [
5257,
8,
69,
671,
103,
49... | [] | [] | [
[
"https://en.m.wikipedia.org/wiki/Tardigrade",
"marsmobile.jpl.nasa.gov",
"https://www.sciencealert.com/here-s-why-nasa-s-mars-rovers-are-banned-from-investigating-that-liquid-water",
"https://marsmobile.jpl.nasa.gov/msl/mission/technology/insituexploration/planetaryprotection/",
"sciencealert.... | ||
2lirdu | how is it the island of java can support it's 140+ million people in area the size of north carolina? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2lirdu/eli5_how_is_it_the_island_of_java_can_support_its/ | {
"a_id": [
"clv8szd",
"clvcqlb"
],
"score": [
12,
6
],
"text": [
"by depending on trade for food and other resources, and coping up with less personal space. there's still some farms and forests, but yeah its hard to get away from other people.\n\nthe total north carolina population is ab... | [] | [] | [
[],
[]
] | ||
5gl112 | Treatment of French colonies | I have a task in school to talk about how the french treated their colonies. I have found some information, but i would like to know more | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5gl112/treatment_of_french_colonies/ | {
"a_id": [
"dat313m"
],
"score": [
2
],
"text": [
"Hey there, AskHistorians allows homework questions, but other people can't do the work for you - for the way HW questions are treated on here see [the rules](_URL_0_) and [this roundtable discussion](_URL_1_). To boil it down, you have to show th... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/rules#wiki_homework",
"https://www.reddit.com/r/AskHistorians/comments/4cb022/rules_roundtable_8_the_raskhistorians_homework/"
]
] | |
64b3r5 | why is chemotherapy used the way it is? | As a general treatment of the body, rather than a local treatment of the area affected by the cancer? It just seems like if we are able to use anesthic locally, or generally, then why can't we choose to do the same with chemo? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/64b3r5/eli5_why_is_chemotherapy_used_the_way_it_is/ | {
"a_id": [
"dg0rj2e",
"dg0rqcx",
"dg10oyj",
"dg12k1v"
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"score": [
3,
5,
2,
2
],
"text": [
"I think that is what radiotherapy is. Radiotherapy focuses on one spot but chemo kills cancer cells which are trying to spread. I could be wrong tho.",
"Chemo attempts to stop ... | [] | [] | [
[],
[],
[],
[]
] | |
3iho7w | Where does the church's money come from? | I understand that in the past things were different, but nowadays the roman catholic church is far from its days of glory, still it manages to fund every church around the continent? Donations can´t suffice I mean... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3iho7w/where_does_the_churchs_money_come_from/ | {
"a_id": [
"cugmmwf"
],
"score": [
2
],
"text": [
"This goes well within the 20 year rule, you may want to ask this on a religious oriented sub, such as /r/Catholicism or /r/Christianity.\n\nAs an aside, the church can have jobs outside just being a priest. I know my local pastor is also a succes... | [] | [] | [
[]
] | |
6dp3y9 | what causes the cloud rings to form around and above a nuclear or thermonuclear bomb? | Example of [high-yield fusion Castle Bravo shot](_URL_0_) with rings. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6dp3y9/eli5_what_causes_the_cloud_rings_to_form_around/ | {
"a_id": [
"di4bnyl"
],
"score": [
5
],
"text": [
"The immense force of the blast creates a wave of high pressure in the air, traveling outwards from the centre.\n\nFollowing this high pressure is an area of extreme low pressure, this low pressure causes a drastic temperature drop.\n\nDropping te... | [] | [
"https://www.youtube.com/watch?v=T2I66dHbSRA"
] | [
[]
] | |
1nreak | How did "x" become the conventional, go-to variable? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1nreak/how_did_x_become_the_conventional_goto_variable/ | {
"a_id": [
"ccldrty"
],
"score": [
32
],
"text": [
" > You'll find details on this point (and precise references) in Cajori's History mathematical notations, 340. He credits Descartes in his La Géometrie for the introduction of x, y and z (and more generally, usefully and interestingly, for the ... | [] | [] | [
[
"http://jeff560.tripod.com/variables.html",
"http://jeff560.tripod.com/mathword.html",
"http://archive.org/details/historyofmathema031756mbp",
"http://mathoverflow.net/questions/30307/explanation-why-x-y-z-are-always-variables/30414#30414",
"http://jeff560.tripod.com/mathsym.html"
]
] | ||
qr5s2 | Question about tooth decay and evolution. | Did humans get cavities before inventions like refined sugars? Were our teeth designed to last a lifetime without brushing and cleaning? | askscience | http://www.reddit.com/r/askscience/comments/qr5s2/question_about_tooth_decay_and_evolution/ | {
"a_id": [
"c3zs26x",
"c3zs5f4",
"c3zsn9n"
],
"score": [
2,
2,
2
],
"text": [
"Yes, we got cavities. Go google image some pics of old skulls.",
"I don't have the study in front of me, but I remember learning in college that the native Ohio river valley people had a much lower ... | [] | [] | [
[],
[],
[]
] | |
2qjyz2 | (Math) Do we know everything there is to know about math? Or are there new discoveries being made in mathematics? | Do we know everything there is to know about math? Or are there new discoveries being made in mathematics? If so, what are they?
| askscience | http://www.reddit.com/r/askscience/comments/2qjyz2/math_do_we_know_everything_there_is_to_know_about/ | {
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"cn6z1on",
"cn70aoh",
"cn71a54",
"cn745h0",
"cn74x6e",
"c... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Poincar%C3%A9_conjecture",
"http://en.wikipedia.org/wiki/Fields_Medal#Fields_medalists",
"http://en.wikipedia.org/wiki/Twin_prime",
"http://en.wikipedia.org/wiki/Fermat%27s_Last_Theorem",
"http://en.wikipedia.org/wiki/Abel_Prize#Laureates"
],
[
"http://en.... | |
fqn0o | Does every neuron contain every neurotransmitter? | I have a pretty basic understanding of how synaptic transmission works and all that, but I have always wondered this. Does every neuron have it all? Or do certain neurons only contain certain transmitters? | askscience | http://www.reddit.com/r/askscience/comments/fqn0o/does_every_neuron_contain_every_neurotransmitter/ | {
"a_id": [
"c1hwvxc",
"c1hx60u",
"c1hxc07"
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"score": [
6,
2,
5
],
"text": [
"I can answer the following question: \"Does every neuron have the genetic capability to *create* every neurotransmitter?\" **Yes** (short answer). The two main excitatory and inhibitory neurotransmitter... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Synaptic_transmission#Cotransmission"
]
] | |
9m0xgn | Would a plant/crop grow faster if it had artificial sunlight and perfect conditions all the time? | Just curious since vertical farms might be a real thing in a few decades. So they can a building that has the perfect temperature, humidity/climate for a given crop.
So could having artificial sunlight shine on the crop all day everyday cause the plant to grow faster? Or is there a maximal a plant can grow in a year... | askscience | https://www.reddit.com/r/askscience/comments/9m0xgn/would_a_plantcrop_grow_faster_if_it_had/ | {
"a_id": [
"e7cedql",
"e7ng8kq"
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"score": [
3,
2
],
"text": [
"It is not so much 'growing faster' but 'just growing with minimum light'. \n\nA(not very satisfactory) explanation is [airmass](_URL_0_), if a plant grows during spring in the Nordic countries with (due to airmass) only... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Air_mass_%28solar_energy%29"
],
[]
] | |
g3pjxv | what does hormones actually do to our brains, how it makes us think, and if we extract all the hormone and hormone producing glands will the person be dead or lose his ability to think and feel? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/g3pjxv/eli5_what_does_hormones_actually_do_to_our_brains/ | {
"a_id": [
"fnsnhy2"
],
"score": [
3
],
"text": [
"Hormones is a functional name for dozens of chemicals that serve as messengers between organs, and mediate physiological processes. They basically change what cells/tissues/organs do by changing the chemical environment in which said cells are. I... | [] | [] | [
[]
] | ||
apx17e | could an organism living in the ocean at a pressure of 5 tons/in^2 survive a hit from a sledge hammer? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/apx17e/eli5_could_an_organism_living_in_the_ocean_at_a/ | {
"a_id": [
"egbr5j7",
"egbsjbj"
],
"score": [
2,
3
],
"text": [
"It would die. Constant even pressure from all sides is not the same as non-uniform pressure hitting you from one direction, which would splatter the poor thing in the other direction.",
"You have to remember that organis... | [] | [] | [
[],
[]
] | ||
31xmlg | how do united states defence contractors make money when they are not needed? | I searched! Don't kill me!! :)
There aren't any major battles right now (that I know of), so what exactly do companies like General Dynamics do during these times? I would assume production of their vehicles and tanks, and planes, and missiles and everything that they produce is on hold. Its not like tanks and APVs ar... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/31xmlg/eli5_how_do_united_states_defence_contractors/ | {
"a_id": [
"cq5xjgp",
"cq5yemg",
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],
"score": [
5,
3,
2
],
"text": [
"Many still have personnel overseas re-building infrastructure, training foreign and US troops, and cleaning up everything afterwards. Weapons and equipment are still used and destroyed in training (thin... | [] | [] | [
[],
[
"https://m.youtube.com/watch?v=4F4qzPbcFiA"
],
[]
] | |
2s981m | Is there a 4 dimensional analog to a sphere like a tesseract is for a cube? | askscience | http://www.reddit.com/r/askscience/comments/2s981m/is_there_a_4_dimensional_analog_to_a_sphere_like/ | {
"a_id": [
"cnney27"
],
"score": [
39
],
"text": [
"Yes, the sphere *S*^(3), which is the *three-dimensional* sphere (embedded in Euclidean four-dimensional space), is the set of points (*x**_1_*, *x**_2_*, *x**_3_*, *x**_4_*) such that\n\n*x**_1_*^2 + *x**_2_*^2 + *x**_3_*^2 + *x**_4_*^2 = 1\n\n... | [] | [] | [
[]
] | ||
t1u3v | As an international programmer, how do you deal with using computer science in languages from different countries? | askscience | http://www.reddit.com/r/askscience/comments/t1u3v/as_an_international_programmer_how_do_you_deal/ | {
"a_id": [
"c4itf6c"
],
"score": [
3
],
"text": [
"I am an American working for a Japanese astronomical observatory in Hawaii.\n\nAll code is in English (mostly C, Python, Java, some C++ and some Objective C). Documentation around the code may be in english or japanese. Stand-alone documentatio... | [] | [] | [
[]
] | ||
317u8h | What would a gas giant look like from within? | Intense radiation, pressure, and winds and whatnot aside, just curious what this would be like. What would it look like? How far does light penetrate? | askscience | http://www.reddit.com/r/askscience/comments/317u8h/what_would_a_gas_giant_look_like_from_within/ | {
"a_id": [
"cq06fu7"
],
"score": [
2
],
"text": [
"\"About 500 kilometers over the dense cloud cover, we enter Jupiter’s troposphere, and keep diving. This “haze” area is filled with all kinds of odd compounds, most interestingly hydrazine and the increasingly important polycyclic aromatic hydroc... | [] | [] | [
[
"http://www.geek.com/news/what-would-it-be-like-to-stand-on-jupiter-1599006/",
"http://www.universetoday.com/113106/whats-inside-jupiter/"
]
] | |
45sbv3 | are the black panthers a racist hate group? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/45sbv3/eli5_are_the_black_panthers_a_racist_hate_group/ | {
"a_id": [
"czzt5zy",
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"score": [
2,
5,
2
],
"text": [
"That's gonna be a touchy subject and one just asking for a Reddit War. However, here is the wiki on them _URL_0_ and you make your own conclusions. Remember that when they were active it was a very diff... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Black_Panther_Party"
],
[],
[]
] | ||
l2jh9 | nominalism | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/l2jh9/eli5_nominalism/ | {
"a_id": [
"c2pd3ed",
"c2pd3ed"
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"score": [
2,
2
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"text": [
"4 upvotes and no comments, wtf?!?!?",
"4 upvotes and no comments, wtf?!?!?"
]
} | [] | [] | [
[],
[]
] | ||
ngcdz | Is it correct (Scientifically) to refer to Humans as Omnivores? | Not all of us eat meat, not all of us eat plants and some of us enjoy both. We've got a couple of sharp teeth for tearing meat (I assume) and some flat ones for chewing greens (I assume).
Whats the verdict askscience?? | askscience | http://www.reddit.com/r/askscience/comments/ngcdz/is_it_correct_scientifically_to_refer_to_humans/ | {
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5
],
"text": [
"We are omnivores by design, even if we arent all by habit. Same way that someone with backwards sleep habits would not put our status as diurnal as any different.",
"Evolutiona... | [] | [] | [
[],
[],
[],
[]
] | |
6mm2ny | What are these straight line formations in the middle of Australia and what caused them? | [This](_URL_1_) is the phenomenon I'm referring to.
The very weird straight drainage patterns it results in can clearly be seen on the [beautiful map](_URL_2_) of the continent's river basins seen on [this reddit post](_URL_0_), which led me to ask the question.
Is this natural? How did it occur? Why is it unique to ... | askscience | https://www.reddit.com/r/askscience/comments/6mm2ny/what_are_these_straight_line_formations_in_the/ | {
"a_id": [
"dk2mlwz",
"dk2nxiz"
],
"score": [
10,
26
],
"text": [
"**EDIT:** It appears, as pointed out by /u/eliminate1337, these are related to linear dunes in the Simpson Desert [(e.g. this paper discussing the formation and migration of said dunes)](_URL_1_). I've (1) seen so many sim... | [] | [
"https://www.reddit.com/r/Map_Porn/comments/6m1zzs/river_basins_of_australia_in_rainbow_colours_3686/",
"https://www.google.com/maps/place/Australia/@-24.7934378,136.982672,71440m/data=!3m1!1e3!4m5!3m4!1s0x2b2bfd076787c5df:0x538267a1955b1352!8m2!3d-25.274398!4d133.775136",
"http://i.imgur.com/KOY6jss.jpg"
] | [
[
"http://edtech.mit.edu/fcgi-bin/pgt?part=1.5.1",
"http://onlinelibrary.wiley.com/doi/10.1002/2015JE004892/pdf",
"http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/how-flow-direction-works.htm",
"http://www.nationsonline.org/maps/australia-topographic-map.jpg"
],
[
"https://en... | |
1me92i | what exactly is a time share? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1me92i/eli5_what_exactly_is_a_time_share/ | {
"a_id": [
"cc8d2ug"
],
"score": [
2
],
"text": [
"It's partial ownership in a property. In a simple example, you and 25 other people would get together to buy something very expensive, like a condo that would cost millions of dollars. Then you all agree to each spend two weeks per year in the co... | [] | [] | [
[]
] | ||
1lhg87 | If dreams are memory solidification processes; What are nightmares? | From what I understand, dreams are the loose association process needed for short term memory from the day to turn into long term memory.
If this is so, or even if we don't presuppose this position, What are nightmares? What, if any, are the evolutionary benefits of them? | askscience | http://www.reddit.com/r/askscience/comments/1lhg87/if_dreams_are_memory_solidification_processes/ | {
"a_id": [
"cbzcmcy"
],
"score": [
16
],
"text": [
" > From what I understand, dreams are the loose association process needed for short term memory from the day to turn into long term memory.\n\nThis is not known to be true. Right now, we don't know what dreams are, nor what is the benefit in h... | [] | [] | [
[
"http://psycnet.apa.org/journals/bul/135/5/731/",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824214/",
"http://www.jneurosci.org/content/30/25/8671.short",
"http://www.jneurosci.org/content/30/26/9007.short",
"http://www.ncbi.nlm.nih.gov/pubmed/21075233"
]
] | |
2gomha | How often do electrons move energy levels? | I understand the basics of it. But what's the deciding factor in what energy level they move down to. The emissions spectrum we can see is when electrons drop to n=2 - but why does this happen in hydrogen when there is only one electron? Surely it would just drop down from wherever it was to n=1? And does it drop strai... | askscience | http://www.reddit.com/r/askscience/comments/2gomha/how_often_do_electrons_move_energy_levels/ | {
"a_id": [
"ckl4y4z",
"ckl4zkz"
],
"score": [
3,
3
],
"text": [
"This is actually quite complicated. In short, it depends on the specific atom and how its electronic structure is. It is not possible to further understand this from Bohr's model which just considers the different energy lev... | [] | [] | [
[],
[
"http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hydazi.html"
]
] | |
4w5ev1 | in the restaurant industry, why do prices increase from breakfast through lunch and into dinner? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4w5ev1/eli5_in_the_restaurant_industry_why_do_prices/ | {
"a_id": [
"d6449ye",
"d644qug",
"d644xre"
],
"score": [
7,
5,
2
],
"text": [
"I'm not sure about breakfast, but my first guess would be that most breakfast ingredients are cheaper. \nAs for lunch to dinner, the basic answer is portion sizes. Even ordering the exact same entree, i... | [] | [] | [
[],
[],
[]
] | ||
5ync4i | how is exercise an anti-inflammatory? | Specifically, what does exercise do to the body that reduces inflammation? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ync4i/eli5_how_is_exercise_an_antiinflammatory/ | {
"a_id": [
"deredm6"
],
"score": [
3
],
"text": [
"Think of inflammation as coming in two different flavors. \n\nAcute inflammation is temporary and strong. It breaks down your body in a temporary way and when your body is done repairing itself, you just made it stronger and better than it was be... | [] | [] | [
[]
] | |
n52ae | What is going on inside a battery to establish the potential difference that causes electric current to flow? | I'm taking an electricity and magnetism course, and its clear that some sort of work has to be done in the battery to cause current flow, but we've just accepted that it happens and moved on with circuit analysis. But I'm curious to know what the chemistry is that allows this to happen. | askscience | http://www.reddit.com/r/askscience/comments/n52ae/what_is_going_on_inside_a_battery_to_establish/ | {
"a_id": [
"c36b0jt",
"c36b0s9",
"c36eej1",
"c36fyn5",
"c36b0jt",
"c36b0s9",
"c36eej1",
"c36fyn5"
],
"score": [
2,
5,
4,
2,
2,
5,
4,
2
],
"text": [
"The difference in potential for molecules to donate/receive electrons. Some molecules are gr... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Half_cell",
"http://en.wikipedia.org/wiki/Galvanic_cell"
],
[],
[
"http://en.wikipedia.org/wiki/Double_layer_(interfacial)#Electrical_double_layers",
"http://en.wikipedia.org/wiki/Absolute_electrode_potential",
"http://en.wikipedia.org/wiki/Sea_of_elec... | |
1a9uld | What causes the dark coloration around anuses? Poop? Friction? Is it just the same process that darkens genitals and nipples in puberty? | askscience | http://www.reddit.com/r/askscience/comments/1a9uld/what_causes_the_dark_coloration_around_anuses/ | {
"a_id": [
"c8ve9eq"
],
"score": [
3
],
"text": [
"Similar threads - [1](_URL_0_), [2](_URL_1_)"
]
} | [] | [] | [
[
"http://www.reddit.com/r/askscience/comments/scm1m/why_is_some_peoples_genital_skin_several_shades/",
"http://www.reddit.com/r/askscience/comments/x5ryb/why_do_your_genitals_tan_or_at_least_are_darker/"
]
] |
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