q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
value | subreddit stringclasses 3
values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
|---|---|---|---|---|---|---|---|---|---|
3esjmm | why cant leaf blower noise be muffled? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3esjmm/eli5why_cant_leaf_blower_noise_be_muffled/ | {
"a_id": [
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"It can, if you want a 70 pound leaf blower. You can't just wave a wand and make noise go away. You need a lot of very absorbent material with plenty of room for gasses to expand, and also has a clear channel for exhaust to flow through, and even ... | [] | [] | [
[]
] | ||
31ctli | was/is there a reason there was looney tunes and merrie melodies? why didn't they just have one show? | I've tried to read up, it seems that some characters bounced back and forth between the two shows. Any actual reasoning why? Maybe something to do with ownership of certain songs / characters / names ect | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/31ctli/eli5_wasis_there_a_reason_there_was_looney_tunes/ | {
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"text": [
"Both shows were produced by Warner Bros, so I think the separation was done to allow the company to fill up more timeslots with 2 shows instead of 1, which gave their programming more airtime. ",
"[... | [] | [] | [
[],
[
"http://www.straightdope.com/columns/read/1057/whats-the-difference-between-a-looney-tune-and-a-merrie-melody"
],
[]
] | |
1ssenc | Why is the perception of pitch and loudness logarithmic rather than linear ? | askscience | http://www.reddit.com/r/askscience/comments/1ssenc/why_is_the_perception_of_pitch_and_loudness/ | {
"a_id": [
"ce0w17x"
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"text": [
"A log scale gives you a more nuanced and differentiated perception of weak sounds, compared to linear. A linear scale would \"compress\" weak sounds into a much more narrow perceptual range, compared to log.\n\nIt is probably advantageous for all... | [] | [] | [
[]
] | ||
4dbc5z | Was there freedom of speech in Prussia of Frederick the Great? | In some internet discussion, one guy claimed that Prussia of Frederick the Great had greater freedom of speech than modern United States. This is so unbelievable that i asked him for sources, he of course refused to cite any, as expected.
I did some research of my own and found that freedom of speech in 18th century ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4dbc5z/was_there_freedom_of_speech_in_prussia_of/ | {
"a_id": [
"d1pg38d"
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"text": [
"The person you spoke to seems to have a very limited understanding of Early Modern censorship, which was infintely more oppressive than today. As such we will look at two examples.\n\nFirst, Frederick and Voltaire. While the two became friends, [... | [] | [] | [
[
"https://www.questia.com/library/journal/1G1-202311672/voltaire-s-satire-on-frederick-the-great-candide"
]
] | |
1o0cwm | why do race cars have stickers for headlights? why not just real headlights or no stickers? | Do the stickers serve a purpose other than aesthetics? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1o0cwm/eli5_why_do_race_cars_have_stickers_for/ | {
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"text": [
"what stickers? i don't see any [here](_URL_0_)",
"Because it would blind other racers. The roads already have lights that have light... | [] | [] | [
[
"http://rampantramblings.files.wordpress.com/2010/09/subaru-water.jpg"
],
[],
[],
[],
[
"http://blog.simraceway.com/wp-content/uploads/2012/03/R18-TDI-at-night_Sebring-20121.jpg",
"http://www.inautonews.com/wp-content/uploads/yapb_cache/2013_ford_fusion_nascar.bc8zeif4k3cww0sc4skcwow0w.a5fuq... | |
1xmxmy | to keep the physics oriented questions going: i've always wondered what is outside our universe. if the universe is expanding (or contracting), shouldn't there be a space outside of our universe that's allowing for that expansion/contraction? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1xmxmy/eli5_to_keep_the_physics_oriented_questions_going/ | {
"a_id": [
"cfcroq2",
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"score": [
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"text": [
"It's space itself that's expanding. The universe is (probably) infinite in extent, so when we say that it's \"expanding,\" what we mean is that things are getting farther apart.\n\nIt's not expanding \"into\" anything, becau... | [] | [] | [
[],
[]
] | ||
whqd6 | Are there neuroprostheses (namely limb prostheses) that use the electrical impulses directly from severed nerves as control input? If not, why isn't it done? | I have heard of prostheses that do something like what I'm describing, but, if I recall correctly, they connect the severed nerves to rarely used, existing muscles and take the control signals from there. Has anyone ever directly connected a nerve to a device and received input that way?
I ask because it seems like suc... | askscience | http://www.reddit.com/r/askscience/comments/whqd6/are_there_neuroprostheses_namely_limb_prostheses/ | {
"a_id": [
"c5dijti"
],
"score": [
2
],
"text": [
"I don't know anything about prostheses, but I've done lots of nerve recordings. The problem is that a \"nerve\" may contain several thousand individual axons, each of which (or at least groups of which) target different portions of a muscle (or d... | [] | [] | [
[]
] | |
6lw0vm | Why does light travel a longer distance through different medium? | I learnt that light doesn't actually change its speed in a medium that makes it seem like it slows down, instead it only makes it travel a longer route? How does it do that? and why? | askscience | https://www.reddit.com/r/askscience/comments/6lw0vm/why_does_light_travel_a_longer_distance_through/ | {
"a_id": [
"djx37p7"
],
"score": [
11
],
"text": [
"[Check out the FAQ.](_URL_0_)"
]
} | [] | [] | [
[
"https://www.reddit.com/r/askscience/wiki/physics/light_through_material"
]
] | |
37v0ij | why do you have to be over 18 to buy wd-40? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/37v0ij/eli5_why_do_you_have_to_be_over_18_to_buy_wd40/ | {
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"crq1unk",
"crq2xmu",
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"score": [
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35,
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32,
2
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"text": [
"Apparently some genius decided it would be a great idea to inhale the WD40 fumes and get high that way. A bunch of people picked up on it, and so stores se... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
22b59u | why do people have trouble comprehending large numbers? | I'm lookin for more than a "because they're dumb" answer.
People seem to understand the difference and relevance between 500 and 20,000, but the different between 500 million and 20 billion seem to get lumped in as 'big numbers' and people don't seem to comprehend them well.
This is seen frequently in political talks... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22b59u/eli5_why_do_people_have_trouble_comprehending/ | {
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"text": [
"Because humans don't deal with scales that big it's easiest to describe it with time.\n\nIt's easy to think back a year or a decade because we experience that length of time we can understand it. But te... | [] | [] | [
[],
[],
[]
] | |
dfwpkw | When birds (specifically geese, but any birds) fly in a large pattern, how do they know their next move? Are all the birds following the bird at the front? Or do they all know where exactly to go, and just fly in a pattern for efficiency? | askscience | https://www.reddit.com/r/askscience/comments/dfwpkw/when_birds_specifically_geese_but_any_birds_fly/ | {
"a_id": [
"f38tqq5",
"f3agr67"
],
"score": [
8,
6
],
"text": [
"If you are asking about migration behavior, the most entertaining answer has to be a movie from the 90's called \"Fly Away Home\" based on the IRL efforts of Bill Lishman. The birds (Canada geese in the movie, whopping cran... | [] | [] | [
[],
[
"https://www.nytimes.com/2003/01/07/science/fly-ball-or-frisbee-fielder-and-dog-do-the-same-physics.html",
"http://www.indiana.edu/~jkkteach/Q550/Pennings2003.pdf"
]
] | ||
1iwvjo | How do you build a liquid fuel rocket? | askscience | http://www.reddit.com/r/askscience/comments/1iwvjo/how_do_you_build_a_liquid_fuel_rocket/ | {
"a_id": [
"cb8tof2",
"cb8xnbr"
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"score": [
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2
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"text": [
"Hopefully you're already familiar with hobby-grade solid-engine rockets, as that would be the jumping off point for most beginners. Liquid engines are a bit more complicated, and usually have higher thrusts, so they're mean... | [] | [] | [
[
"http://home.total.net/launch/",
"http://www.rocketry.org/faq/faq.php",
"http://www.risacher.org/rocket/"
],
[]
] | ||
zljap | What effect does cooking have on best before/expiry dates? | Say you have some chicken that is due to expire in one day, and then cook it, will it last a further three days, or still expire in one? I'm imagining the cooking kills any present viruses and bacteria, which is what I assume the original expiration date was based on; but obviously new ones might accumulate when it's t... | askscience | http://www.reddit.com/r/askscience/comments/zljap/what_effect_does_cooking_have_on_best/ | {
"a_id": [
"c65nnw1"
],
"score": [
6
],
"text": [
"The expiration dates on food are simply for quality and not safety. Cooking chicken to 165F for 15s (internal temperature, not surface) is sufficient to reduce non-spore forming pathogenic bacteria to non-dangerous levels. If you cook the chicken... | [] | [] | [
[]
] | |
364n8e | What determines the brightness of a light emitting object such as a light bulb or the sun? Is there more photons per every unit of surface area or are the wave lengths just more energetic? | I would like to think that the surfaces of all light emitting objects would release photons evenly assuming they were all spherical in shape. If one of these object had slightly more energy than the other, would it appear brighter or would it change color cause it's wavelengths are getting more energetic? I guess I'm... | askscience | http://www.reddit.com/r/askscience/comments/364n8e/what_determines_the_brightness_of_a_light/ | {
"a_id": [
"crax4eu"
],
"score": [
5
],
"text": [
"Brightness is associated with intensity - which correlates to the number of photons. \n\nA single photon can, indeed, carry more energy than another. Since Energy is related to frequency and wavelength, a change in energy will simply change the ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Black-body_radiation"
]
] | |
2l492l | Why did Rome and Greece have more artists than the Vikings? | Hi!
I'm born and raised in Denmark, and therefore I have heard ALOT about the vikings and our ancient history.
But lately I've been thinking about art and ground-breaking artists.
In ancient Europe, Rome and Greece had a lot of ground-breaking artists and philosophers. The list is very long.
But weren't the scandinav... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2l492l/why_did_rome_and_greece_have_more_artists_than/ | {
"a_id": [
"clrhmm1"
],
"score": [
2
],
"text": [
"Another Dane here, hej :).\n\nSo, the viking age is not actually the same period as what you might think of as the classical era. The viking age is usually considered to have been from 796 to 1066 CE (e.v.t.), while the \"classical era\" when mos... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Viking_art#mediaviewer/File:Osebergskipet-Detail.jpg"
]
] | |
257mqs | how do we know cern's large hadron collider isn't just creating new particles that otherwise wouldn't or do not exist?? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/257mqs/eli5how_do_we_know_cerns_large_hadron_collider/ | {
"a_id": [
"chekv9w",
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"score": [
4,
3
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"text": [
"The point of particle colliders is to generate scenarios that occur in other parts of the universe, but are hard for us to detect. High-energy particle interactions happen all the time, like in the centers of stars.\n\nIt's ... | [] | [] | [
[],
[]
] | ||
4tgnhn | why is it so difficult to keep the pokemon go servers from crashing? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4tgnhn/eli5_why_is_it_so_difficult_to_keep_the_pokemon/ | {
"a_id": [
"d5h3zc7",
"d5h44xn"
],
"score": [
2,
2
],
"text": [
"Imagine that you're in the ocean in a massive school of fish. A fishing boat casts it's net overboard and traps all of you. The crew tries to pull you all in but the wench isn't strong enough, so you all just sit there idlin... | [] | [] | [
[],
[]
] | ||
57efaa | how come if i nick my leg shaving it bleeds like a gunshot wound? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/57efaa/eli5_how_come_if_i_nick_my_leg_shaving_it_bleeds/ | {
"a_id": [
"d8rdvyr"
],
"score": [
10
],
"text": [
"5% of all the blood in your body hangs out in your skin and your legs have lots of blood vessels near the surface. On a tiny, tiny level in your skin, when you cut your leg with a razor, it's so sharp it doesn't leave ragged edges like a normal ... | [] | [] | [
[]
] | ||
2k493t | why do mechanical pencils squeak sometimes while you write? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2k493t/eli5_why_do_mechanical_pencils_squeak_sometimes/ | {
"a_id": [
"clhqxf4"
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"score": [
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"text": [
"Has to do with the \"lead\" used in them. They don't make points like old fashioned pencils and when they get flat on the tip, it creates a specific friction that causes a gross feeling and I'm assuming the squeaky noise you refer to. (I'm Deaf s... | [] | [] | [
[]
] | ||
en5yx9 | Can a liquid/gas get stuck to an adhesive? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/en5yx9/can_a_liquidgas_get_stuck_to_an_adhesive/ | {
"a_id": [
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"score": [
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6
],
"text": [
"Well first it depends on the liquid \nU got water which compared to other liquids doesn’t have great surface tension which causes it to not just stick to itself \nNow u got something like mercury that will not stick to anyth... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Cyanoacrylate"
]
] | |
5lob76 | why can games such as pac man have a maximum level counter value of 256 (maximum 8bit integer value) when the score can go past it? (ex: 293370) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5lob76/eli5_why_can_games_such_as_pac_man_have_a_maximum/ | {
"a_id": [
"dbx6m0e",
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"score": [
3,
7
],
"text": [
"Computers aren't restricted to a single size for all numbers. When a developer has limited memory to work with, they'll use the smallest size they can get away with for each number to use the least amount of memory. \n\nThe ... | [] | [] | [
[],
[]
] | ||
1ulh8q | When astrophysicists say that a planet is the same size as Earth, do they mean in terms of mass or in terms of diameter? | askscience | http://www.reddit.com/r/askscience/comments/1ulh8q/when_astrophysicists_say_that_a_planet_is_the/ | {
"a_id": [
"cejebpd"
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"score": [
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"text": [
"Well, you probably won't catch an astrophysicist using a term as vague as \"size,\" particularly not in a research paper - scientists will be specific when talking about radius, mass etc. But when these things get reported out and covered outside... | [] | [] | [
[]
] | ||
5dv4qg | [other] why is there no requirements for us cabinet members? | Some of the positions seem like it would be quite beneficial to have a good, educated background in, particularly the more "sciencey" positions. I believe the Surgeon General MUST be an MD so why not say the secretary of energy be a doctorate who specializes in that? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5dv4qg/eli5other_why_is_there_no_requirements_for_us/ | {
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"text": [
" > so why not say the secretary of energy be a doctorate who specializes in that?\n\nBecause when you start placing such rules on appointments whoever makes those rules now is in ... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/Ernest_Moniz",
"https://en.wikipedia.org/wiki/United_States_Department_of_Energy",
"https://www.whitehouse.gov/administration/cabinet"
],
[]
] | |
4dqhnf | what is tau in math, and why do some people prefer it to pi? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4dqhnf/eli5_what_is_tau_in_math_and_why_do_some_people/ | {
"a_id": [
"d1td409"
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"score": [
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],
"text": [
"Numberphile did a video on this topic, it adresses most of the points:\n\n[Tau replaces Pi?](_URL_0_)\n"
]
} | [] | [] | [
[
"https://www.youtube.com/watch?v=83ofi_L6eAo"
]
] | ||
2cwv6e | Where and how did the "haunted church" trope originate? | Being a sacred place of worship, I've always wondered why there are stories of ghosts (which seems so unholy) in churches. How did this originate? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2cwv6e/where_and_how_did_the_haunted_church_trope/ | {
"a_id": [
"cjk31o0"
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"score": [
8
],
"text": [
"Can I just tell you, thank you. Seriously. Thank you. People rarely ask about ghosts, and even more rarely about their interaction with sacred space- and here you’ve come along and made my day by asking the perfect question.\n\nSimply put, ghosts... | [] | [] | [
[
"http://www.fordham.edu/halsall/source/augustine-onthecareofthgedeadnpnf1-03-39.asp"
]
] | |
fee12l | why do our bodies twinge or feel a wave/rush when viewing a video of someone having an accident? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fee12l/eli5_why_do_our_bodies_twinge_or_feel_a_waverush/ | {
"a_id": [
"fjndlrm"
],
"score": [
8
],
"text": [
"mirror neurons \n\nWhen we see someone perform an act, your brain fires as if you were performing the act. So your body cringes instinctively because your brain is acting like you just had an accident."
]
} | [] | [] | [
[]
] | ||
s5d7p | Could adaptation be considered short-term evolution? | For example, how some bacteria are becoming antibiotic resistant in recent years.
What is the distinct difference between the two? | askscience | http://www.reddit.com/r/askscience/comments/s5d7p/could_adaptation_be_considered_shortterm_evolution/ | {
"a_id": [
"c4b7kya",
"c4b8w97",
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],
"score": [
3,
4,
2
],
"text": [
"Strictly, in the biological sense, evolution is the successive modification of heritable traits across generations. Traits, in the evolutionary sense, are defined as an observable expression of a gene. ... | [] | [] | [
[],
[],
[]
] | |
c9dkkn | Was there some sort of "reverse-Orientalism" (Westernism?)? | Could I, say, find a Persian philosopher dealing in details with the theme of "Western despotism", or an Indian novelist setting his novel in the mysterious, magical and erotic land of Northern Lancashire?
To give some chronological boundaries, I'm mostly interested in what happened before the 20th century (so not, f... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/c9dkkn/was_there_some_sort_of_reverseorientalism/ | {
"a_id": [
"esz36ql"
],
"score": [
27
],
"text": [
"/u/Zooasaurus and I talk about two different eras--19th century and Middle Ages--in [this earlier thread](_URL_1_). I'll c-p mine here, but you really should check out theirs as well!\n\nOh, and I don't know if this interests you, but I also hav... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/9zy1x6/the_middle_eastern_folktale_aladdin_was_actually/",
"https://www.reddit.com/r/AskHistorians/comments/9x0tvb/were_there_eastern_parallels_to_orientalism_at/"
]
] | |
5mzg14 | why do we physically shake our heads to help change our train of thought? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5mzg14/eli5_why_do_we_physically_shake_our_heads_to_help/ | {
"a_id": [
"dc7jfwc",
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"score": [
2,
8,
7
],
"text": [
"Thoughts and memories are stored physically in your brain. A little mild brain damage caused by shaking your head may break some of those connections, enabling new ones to be made. ",
"Anything tha... | [] | [] | [
[],
[],
[]
] | ||
2kitz2 | when i 'know what i mean', but can't seem to explain it in words, what is happening in my brain? | i'm writing an essay write now and i keep hitting that point where i feel like i know what i'm trying to say, but i can't seem to actually articulate it. just wondering if there was any interesting rationale for this maybe? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2kitz2/eli5_when_i_know_what_i_mean_but_cant_seem_to/ | {
"a_id": [
"cllpu2p",
"cllzyns"
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"score": [
7,
3
],
"text": [
"I think you are describing \"presque vu\" (French: almost seen) which is another word for Tip of the Tongue syndrome. There are a few different hypothesis as to what is happening. As far as I understand it, it is when your b... | [] | [] | [
[],
[]
] | |
1vjlvf | Was anything like animal husbandry ever attempted on humans? | Slaves being the most obvious group, but I guess I don't want to limit my question. I knew slaves were sold at higher or lower prices according to physique and ability, but were there attempts to "breed out" unwanted traits like, say, aggressiveness? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1vjlvf/was_anything_like_animal_husbandry_ever_attempted/ | {
"a_id": [
"cet3ctf"
],
"score": [
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"text": [
"The word you are looking for is \"eugenics.\" That is not a good answer, but hopefully knowing the terminology will help you find answers more easily if you search /r/askhistorians. "
]
} | [] | [] | [
[]
] | |
1ksa8n | Questions on red shifts and expansion of universe | askscience | http://www.reddit.com/r/askscience/comments/1ksa8n/questions_on_red_shifts_and_expansion_of_universe/ | {
"a_id": [
"cbs3m8v"
],
"score": [
2
],
"text": [
"1. Redshift due to relative velocity is indistinguishable from redshift due to expansion of the intervening space.\n\n2. The expansion of the universe isn't a force itself, to properly characterize it you need an understanding of general relativi... | [] | [] | [
[]
] | ||
t62l6 | Why does loud, low-pitched noise from powerful rockets and jet engines also have a distinctive high pitched crackle? | Watching the recent Coor's Light rocket take-off commercial reminded me of a question I have wondered about. Why is it that jet fighters and rocket launches can make a deep, powerful roar, and then also at the same this load high pitched crackle sound. I have been to several airshows and a shuttle launch, and I always ... | askscience | http://www.reddit.com/r/askscience/comments/t62l6/why_does_loud_lowpitched_noise_from_powerful/ | {
"a_id": [
"c4jv4xq"
],
"score": [
2
],
"text": [
"This is probably more the product of the sound [clipping](_URL_0_) due to its high amplitude at the mic. The sharp edges at the clipping point are high frequency components in the fourier series of the sound wave. This sounds like \"crackle.\" ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Clipping_%28audio%29"
]
] | |
21brs9 | what do some people find appealing in communism? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/21brs9/eli5_what_do_some_people_find_appealing_in/ | {
"a_id": [
"cgbhyab",
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"score": [
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"text": [
"On paper, it sounds great. Everyone has what they need all the time. Sounds like a Star Trek-like utopia to me.\n\nProblem is, in application, it never works, and those who truly believe in it are either benefiting from it (... | [] | [] | [
[],
[]
] | ||
6fxx2q | why do we have decussation (cross over of nerves) in our nervous system? | Does it serve any purpose or advantage compared to if there is no crossing over? Because I'm sure it'll be a whole lot easier for our body (development stage wise) to make nerves control same side of the body. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6fxx2q/eli5_why_do_we_have_decussation_cross_over_of/ | {
"a_id": [
"dilxeue"
],
"score": [
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"text": [
"This is one of those questions that science currently doesn't have a concrete answer to.\n\nOne of the most popular hypothesis is that nerve crossover occurred when animals went from ventral to dorsal nerve cords. A long long time ago, a rudiment... | [] | [] | [
[
"https://s3.amazonaws.com/classconnection/957/flashcards/1145957/png/screen_shot_2015-01-15_at_65126_pm-14AF0A75FA2524A9B29.png",
"https://www.researchgate.net/publication/10953772_When_does_a_ganglion_become_a_brain_Evolutionary_origin_of_the_central_nervous_system",
"https://www.ncbi.nlm.nih.gov/pub... | |
4c1sqg | What happened to the tribes of Europe? When did their role start to fade and what caused it? | I'm reading a book on African tribalism and clan system and it got me wondering... Did Europe ever have a clan system as today exists in Libya, Somalia etc, and what happened to them? I've heard about the various Germanic and other European tribes but when did their role in everyday life of common people begin to fade ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4c1sqg/what_happened_to_the_tribes_of_europe_when_did/ | {
"a_id": [
"d1eue4o"
],
"score": [
8
],
"text": [
"Well, these social groupings have been important well into the twentieth century. In the middle of the century, a leader arose in a particularly warlike central European tribe who combined millinarianism with mystified teachings regarding tribal ... | [] | [] | [
[]
] | |
v1ktf | Is the Nicotine responsible for the feeling you get when you smoke or is it the Carbon monoxide? | I'm currently studying Heath sciences. so I know some basics, And I know that the Carbon monoxide might reduce the hemoglobin affinity for the Oxygen therefore, less oxygen to the brain. but is this the reason of the "Feeling good" or is it the Nicotine itself?
Edit: actually I just reviewed the monoxide effect on hem... | askscience | http://www.reddit.com/r/askscience/comments/v1ktf/is_the_nicotine_responsible_for_the_feeling_you/ | {
"a_id": [
"c50ieie"
],
"score": [
7
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"text": [
"It's pretty easy to test since there are non-smoking nicotine products, like snus. In sweden, where I live, snus is probably more popular than cigarettes. The \"highs\" are quite similar. Perhaps I'm not being scientific enough here but I'm not s... | [] | [] | [
[]
] | |
1stoph | what causes "brain farts"? | We have all had that moment when we are having a conversation and try to think of a word or name that for some reason remains just on "the tip of your tongue". Why do our brains some times just completely go blank trying to pull a memory that is completely lost, almost like the file containing that information is gone,... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1stoph/eli5_what_causes_brain_farts/ | {
"a_id": [
"ce15vym"
],
"score": [
3
],
"text": [
"When this happens, you've rarely actually lost the memory. What usually happens is you've lost a way to find it.\n\nWhen you learn something, your brain makes pathways to find it later. If these aren't very strong, they can go away. If you didn't... | [] | [] | [
[]
] | |
42ltox | Why everyone hates Inflation Theory? What is the best model to explain the beggining of the Universe? | I have been hearing for a couple of months that the inflation theory, just as the string theory, is "the target drawn around the dart", but I never really get the point of that affirmation. Why is that? Why the inflation theory is "not mathematically elegant"?
Besided the Inflation Theory, what is the best scientific m... | askscience | https://www.reddit.com/r/askscience/comments/42ltox/why_everyone_hates_inflation_theory_what_is_the/ | {
"a_id": [
"czbgv3v",
"czbi5n9",
"czbopvf"
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"score": [
4,
4,
5
],
"text": [
"Can you provide a source for this? Inflation is quite well thought of by most physicists (as far as I'm aware)",
"I thought that the inflation theory is pretty well supported? We observe things movi... | [] | [] | [
[],
[],
[]
] | |
3ph1qa | what is it that psychologists do and how do they actually help people other than being someone to talk with? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ph1qa/eli5_what_is_it_that_psychologists_do_and_how_do/ | {
"a_id": [
"cw6843b",
"cw688or",
"cw68bb2",
"cw6ab46"
],
"score": [
10,
4,
3,
3
],
"text": [
"There's loads of different kinds of therapy out there for all different issues. Cognitive behavioural therapy has been shown to be effective and is quite common. The therapist hel... | [] | [] | [
[],
[],
[],
[]
] | ||
6w6fxf | Were Confederate Memorials erected in the Deep South as a response to the Civil Rights Movement? | There are many people (not so much in the media, but more like local politicians and Facebook pundits) stating that many Confederate Memorials were put up in the 1960's as a way of reinforcing segregation. However I can't really find any list to either prove or disprove this assertion.
I don't really think this is tru... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6w6fxf/were_confederate_memorials_erected_in_the_deep/ | {
"a_id": [
"dm5u5p5"
],
"score": [
19
],
"text": [
"Not to deter further discussion, but...\n\nThere's a very comprehensive [Monday Method's thread from just a few days ago](_URL_0_) featuring many flaired users discussing the statues, their importance (or lack thereof) to historical study, and t... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/6v1yj5/monday_methods_collective_memory_or_lets_talk/",
"https://www.reddit.com/r/AskHistorians/comments/6u6rtk/why_were_confederate_monuments_raised_in_union/",
"https://www.reddit.com/r/AskHistorians/comments/6u4hs2/what_is_the_history_of_the_confeder... | |
2stivd | what does it mean when an abandoned car on the highway has a white bag or object hanging out from the window? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2stivd/eli5_what_does_it_mean_when_an_abandoned_car_on/ | {
"a_id": [
"cnspruf",
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"cnsramn",
"cnsrj0n"
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"score": [
22,
10,
61,
4,
8
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"text": [
"Sorry they're downvoting you bro. /r/nostupidquestions is the place you're looking for. Have an upvote.",
"Around here, vehicles get an orange sticker ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
2cq9vl | "why do my eyes change color?" | I've been noticing recentlly that my eyes change their shade throught the day, at seemingly random intervals.
For example, when I was shaving this morning they were a dark forest green (really awesome looking really), but as the day progressed the became a very pastel green, and at one point were almost white.
I've a... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2cq9vl/eli5_why_do_my_eyes_change_color/ | {
"a_id": [
"cjhxzje",
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"cji1qa3",
"cji3y4f"
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"score": [
2,
2,
2,
4,
2
],
"text": [
"I would like to know this too. My eyes change from deep blue to green all the time. Some have told me it depends on what I'm wearing and or what my surroundin... | [] | [] | [
[],
[],
[],
[],
[]
] | |
6eo7la | how do weed killers like round up decipher between weed roots and plant roots? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6eo7la/eli5_how_do_weed_killers_like_round_up_decipher/ | {
"a_id": [
"dibqk3d"
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"score": [
5
],
"text": [
"Round up doesn't decipher, it kills almost any plant that absorbs enough of it, by inhibiting an enzyme plants need to grow. It doesn't generally kill woody plants, because it's typically sprayed on a large portion of the larger plants sensitive... | [] | [] | [
[]
] | ||
4wsfjf | if red light is least scattered by air molecules, why is green a more visible color in laser pointers? | Red is used in cautionary signs and is a connotation of danger because it is the visible to the human eye, right? So why are green laser pointers easier to see at day and night over long distances? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4wsfjf/eli5_if_red_light_is_least_scattered_by_air/ | {
"a_id": [
"d69isrr",
"d69k4vr",
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"score": [
4,
2,
2
],
"text": [
"The human eye is most sensitive to green. Green is also scattered by air more than red. You can't see a laser from the side at all if there's nothing to scatter the light to you. This combination makes ... | [] | [] | [
[],
[],
[]
] | |
1dqbk1 | Is the siege and razing of Jerusalem in 70CE recorded in Jewish religious texts? If so, then what is said and what is the perspective on the event? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1dqbk1/is_the_siege_and_razing_of_jerusalem_in_70ce/ | {
"a_id": [
"c9sv0bs"
],
"score": [
2
],
"text": [
"Flavious Iosephus recorded it, but that isn't a religious text, and Talmud was written only a few centuries later. So the first hand perspective is probably missing for the most part from the religious literature due to the fate the Jews met. In ... | [] | [] | [
[]
] | ||
76ew51 | Is it logically possible for humans not to have had a mitochondrial Eve? | Is a mitochondrial eve a logical necessity for humans given how mitochondria work in the context of human (or mamalial?) (or any) evolution? | askscience | https://www.reddit.com/r/askscience/comments/76ew51/is_it_logically_possible_for_humans_not_to_have/ | {
"a_id": [
"doecasx",
"doecex1"
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"score": [
4,
3
],
"text": [
"I can see how you might have a mitochondria introduced from, say, interbreeding with neanderthals and then have a separate mitochondrial population hanging around in Europe, but then you could just go back to the common ance... | [] | [] | [
[],
[]
] | |
3ik9ug | what did humans think time and gravity were before einstein and newton? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ik9ug/eli5_what_did_humans_think_time_and_gravity_were/ | {
"a_id": [
"cuh699z"
],
"score": [
2
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"text": [
"Newton didnt really change anything about how we percieved time that I can think of. Stuff falling down was intuitive to people, it didnt need explaining. Its just the way things were. And if it did need explaining \"because god made it that way\... | [] | [] | [
[]
] | ||
2sppy2 | Has the White House ever been burglarized? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2sppy2/has_the_white_house_ever_been_burglarized/ | {
"a_id": [
"cns7drl",
"cnsas3n"
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"score": [
4,
2
],
"text": [
"Do you mean other than being looted and burned down in 1814?",
"[Dolly Madison **totally** stole a portrait of George Washington from the White House.](_URL_0_)"
]
} | [] | [] | [
[],
[
"http://www.smithsonianmag.com/history/how-dolley-madison-saved-the-day-7465218/?no-ist"
]
] | ||
88emhp | Why were live-in domestic servants so much more common in the 19th and early 20th centuries than they are today? | I've been doing some family history research recently, and it appears that a number of my ancestors had servants/maids (not slaves) who lived in the house and assisted with domestic duties. None of these ancestors were exceptionally wealthy. For example, my paternal grandmother grew up with a servant in her household, ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/88emhp/why_were_livein_domestic_servants_so_much_more/ | {
"a_id": [
"dwkknc1"
],
"score": [
21
],
"text": [
"I'm giving this answer mostly based on two books by the same historian, Frank Trentmann:\n\n - The Empire of Things (2016)\n - The Oxford Handbook of the History of Consumption (2012)\n \nFrom their titles alone, you may be able to guess that Tr... | [] | [] | [
[]
] | |
9zyznb | the mpemba effect, and does it really work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9zyznb/eli5_the_mpemba_effect_and_does_it_really_work/ | {
"a_id": [
"eaf5apc"
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"score": [
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"text": [
"When you freeze water, normally cold water will freeze faster than hot water. This makes sense - 200F water needs to become 150F water before you can freeze it so you'd expect to see 150F water take less time to freeze. Usually, this is the cas... | [] | [] | [
[]
] | ||
5r3dme | how come calculators are the only computers we've commonly adapted solar panels into? why haven't we intergrated them into things like laptops or cellphones? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5r3dme/eli5_how_come_calculators_are_the_only_computers/ | {
"a_id": [
"dd4357g",
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"score": [
19,
4,
3
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"text": [
"Handheld calculators require very little power; tiny solar panels can power them.\n\nYou'd need massive panels to power a smart phone. The power consumption difference is more than you'd think.",
"... | [] | [] | [
[],
[],
[]
] | ||
a6xs9a | why do usb connectors have 2 sides? every time i go to plug one in i have to turn it around... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a6xs9a/eli5_why_do_usb_connectors_have_2_sides_every/ | {
"a_id": [
"ebytfes",
"ebytxpd",
"ebyu183",
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"score": [
3,
6,
2,
16
],
"text": [
"The real question is why are they rectangular and not trapezoid. Like the USB mini or printer connector.\nIf a computer expects 10signals/wires in order 1-10 it will usually not b... | [] | [] | [
[],
[],
[],
[]
] | ||
cqu5ns | space debris artificial vs. natural | There are always plenty of information/videos available about the dangers of space debris to satellites and ISS but not a lot about the other natural objects like comets, asteroids or other natural debris. Does that mean they are not as dangerous as the man-made debris? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cqu5ns/eli5_space_debris_artificial_vs_natural/ | {
"a_id": [
"ewzt5cj",
"ex017rh"
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"score": [
3,
3
],
"text": [
"There really isn't any appreciable natural debris in the areas where satellites orbit. In the millions and millions of years of the Earth existing before we started sending stuff up all the rocks, dust and particles were dra... | [] | [] | [
[],
[]
] | |
1k77jn | The absorbance/reflection of light is affected by the colour of the surface it hits; does this also apply to sound? | askscience | http://www.reddit.com/r/askscience/comments/1k77jn/the_absorbancereflection_of_light_is_affected_by/ | {
"a_id": [
"cbm3tae",
"cbm4hkg"
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"score": [
3,
2
],
"text": [
"Absorption & reflection of light is not affected by the colour of something, it is *precisely* what gives something its colour. The colour that we perceive is a result of the electronic structure of an object and how light... | [] | [] | [
[],
[]
] | ||
36oi3k | What is the relationship between the planck length/time and the speed of light? | Is the speed of light the fastest thing possible *because* it is the shortest possible distance over the shortest possible time, or are those values defined by the speed of light itself, which is the maximum speed for some other reason? | askscience | http://www.reddit.com/r/askscience/comments/36oi3k/what_is_the_relationship_between_the_planck/ | {
"a_id": [
"crfpebl"
],
"score": [
12
],
"text": [
"The Planck lengths and times are **defined** such that their ratio is the speed of light. The only difference between them is a factor of c. The Planck units are not inherent universal pixel sizes, although that's a fairly common misconception."... | [] | [] | [
[]
] | |
8kzrxq | Why was Ottoman Empire so unprepared for first Balkan War? | Their army was larger than any Balkan nation and they still lost, at least spies could get to some info. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8kzrxq/why_was_ottoman_empire_so_unprepared_for_first/ | {
"a_id": [
"dzc0axg"
],
"score": [
72
],
"text": [
"In his study of Ottoman performance during the war, now routinely cited by Ottoman historians, Edward J. Erickson identifies the following as the primary factor involved in the Ottoman defeat:\n\nBeginning in 1910 the Ottomans had, in conjunctio... | [] | [] | [
[]
] | |
1apix7 | If a person injected alcohol directly into their bloodstream would they become instantly drunk? | askscience | http://www.reddit.com/r/askscience/comments/1apix7/if_a_person_injected_alcohol_directly_into_their/ | {
"a_id": [
"c8zl3dw"
],
"score": [
2
],
"text": [
"I would say that around/above 0.20 BAC is when you are piss drunk, and 0.20 BAC means \"0.2% of a person's blood, by volume, is alcohol\". For the average human with (according to google) 5 liters of blood, this comes out to 1/3rd of an ounce (_U... | [] | [] | [
[
"https://www.google.com/search?hl=en&safe=off&q=5+liters+times+.002+in+ounces"
]
] | ||
hxsuk | How can some animals live for several centuries without dying off from cancer far earlier? | In an earlier thread on [extending life spans](_URL_0_), many concluded that at some point cancer rates would overwhelm treatment. As we age, the risk of cancer increases due to likelihood of certain errors increasing with time.
So, how do certain [animals](_URL_1_), with very long life spans, overcome this problem... | askscience | http://www.reddit.com/r/askscience/comments/hxsuk/how_can_some_animals_live_for_several_centuries/ | {
"a_id": [
"c1z983n",
"c215dwd"
],
"score": [
12,
2
],
"text": [
"First, the examples in your second link seem mostly to be *maximum* lifespans, which is not the same as average lifespans. A single individual living far beyond the average lifespan isn't really indicative of anything, just... | [] | [
"http://www.reddit.com/r/askscience/comments/gw56g/how_close_are_we_to_being_able_to_live_forever/",
"http://en.wikipedia.org/wiki/List_of_long-living_organisms#Animals"
] | [
[],
[
"http://cancerres.aacrjournals.org/content/71/11/3739.short"
]
] | |
34ufxu | How hot is the moon during an eclipse? | So I was thinking about the fact that the reason we have seasons is because the earth is tilted and each hemisphere is either closer or further from the sun depending on the time of the year. I was wondering if the same effect happens to the moon; What is the difference in temperature between when there is a solar ecli... | askscience | http://www.reddit.com/r/askscience/comments/34ufxu/how_hot_is_the_moon_during_an_eclipse/ | {
"a_id": [
"cqy86z2",
"cqyff55",
"cqyxl6z"
],
"score": [
6,
5,
2
],
"text": [
"Solar eclipse has no effect on temperature because the exact same amount of sun is still hitting the moon. A lunar eclipse would cause a slight decrease in temperature but they are so short it wouldn't... | [] | [] | [
[],
[],
[]
] | |
9wd6ul | When did people first start associating functions to y and x graphs? Why? | askscience | https://www.reddit.com/r/askscience/comments/9wd6ul/when_did_people_first_start_associating_functions/ | {
"a_id": [
"e9k3pll",
"e9ko1bh"
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"score": [
10,
25
],
"text": [
"I would like to encourage more history of science questions on this sub. However, if you don't get an answer, consider posting to /r/askhistorians, /r/historyofscience, /r/historyofideas, /r/philosophyofscience or, in this... | [] | [] | [
[],
[]
] | ||
3cq3ro | in movies when they show pictures of the protagonists when they were younger do they get the actors to bring in actual pictures from their childhood or do they photoshop/use other actors for the pictures? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3cq3ro/eli5_in_movies_when_they_show_pictures_of_the/ | {
"a_id": [
"csxwdhn"
],
"score": [
2
],
"text": [
"Vast majority of the time, they will use young actors. There may have been a couple occasions in which an actor used his actual own photo."
]
} | [] | [] | [
[]
] | ||
69jgsu | if our stomach acid is so strong, why do things that make us sick/give us food poisoning not get destroyed during digestion? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/69jgsu/eli5_if_our_stomach_acid_is_so_strong_why_do/ | {
"a_id": [
"dh72pzi",
"dh72w02",
"dh7780t",
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"dh7cq0m",
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"dh7dusi",
"dh7essu",
"dh7f3xf",
"dh7fhvq",
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"dh7nlzr",
"dh7qyff",
"dh7vpca",
"dh7vq4s",
"dh87a3x",
"dh8rj4b"
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... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"http://www.radiolab.org/story/197112-guts/"
],
[
"https://en.m.wikipedia.org/wiki/Infectious_dose"
],
[],
[],
[],
[],
[],
[],
[],
[]
] | ||
4e3111 | why does wine come in large bottles, while beer comes in cases of much smaller ones? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4e3111/eli5_why_does_wine_come_in_large_bottles_while/ | {
"a_id": [
"d1wk2gb",
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"score": [
10,
8
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"text": [
"Probably because of the fizz. Suppose beer came in one big bottle. Then if you open one you would have to consume it all at one time because if you don't it will eventually go flat. Wine does not have this problem.\n\nEdit:... | [] | [] | [
[],
[
"https://www.vivino.com/wine-news/a-simple-guide-to-wine-bottle-sizes/standard#style"
]
] | ||
rtqr1 | What do historians think of Mikhail Gorbachev? Was his leadership of the USSR's break-up viewed as a success or a failure? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/rtqr1/what_do_historians_think_of_mikhail_gorbachev_was/ | {
"a_id": [
"c48l6pa",
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"score": [
10,
3,
3,
5,
3,
2
],
"text": [
" > Was his leadership of the USSR's break-up viewed as a success or a failure? \n\nGorbachev never wanted the Soviet Union to break-up,... | [] | [] | [
[],
[
"http://www.esquire.com/features/what-ive-learned/mikhail-gorbachev-0908"
],
[],
[],
[
"http://imgur.com/LAeVu"
],
[
"http://articles.latimes.com/1990-11-20/news/mn-5066_1_soviet-union"
]
] | ||
2vbpig | The Royal Frankish Annals contain references to "Saracens" and "Moors". Is there a precise distinction between these two terms for the Franks? | In the Royal Frankish Annals, their Muslim enemies are variously referred to as "Mauri" and "Sarracenos". My Latin sucks, so forgive me if I have written the wrong declension.
The Franks referred to their ally al-Rashid as the king of Persia (regis Persarum) in year 807 of the annals. Did they have a name for their mu... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2vbpig/the_royal_frankish_annals_contain_references_to/ | {
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"The word Saracen is so old that its ultimate etymology is unknown; however it is believed to derive from Abraham's wife Sara. The Saracens originally inhabited the Syro-Arabian desert and harassed the Roman Empire. Startin... | [] | [] | [
[],
[]
] | |
7653cb | why do bodies of water (e.g. oceans, lakes etc...) do not sink into the ground that they are surrounded by. | This was a question I recently heard about a toddler that asked, "Why is that when it rains the water is absorbed in the ground but the ocean water does not" | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7653cb/eli5_why_do_bodies_of_water_eg_oceans_lakes_etc/ | {
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"the ground below a lake or ocean is already fully saturated with water. if you fill a jar with sand and start \"raining\" water into it, you will saturate the sand and a pool of water will eventually develop on top of it. ",... | [] | [] | [
[],
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"https://en.wikipedia.org/wiki/Water_table"
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7np80f | How do historians draw general "rules" or find trends in empires, such as Rome and Britain, that can be indicators of rise, or even decline and imminent fall? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7np80f/how_do_historians_draw_general_rules_or_find/ | {
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"There are many models that seek to plot the factors that contribute to the rise and fall of empires, but perhaps the best-known at present is the one set out by the British historian Paul Kennedy in his The Rise and Fall o... | [] | [] | [
[],
[]
] | ||
c5wrgh | why does the us have so many federal law enforcement agencies, many with overlapping objectives instead of having just one or two for all crimes? | You got the FBI who investigates all federal crimes including drug and weapons trafficking but the DEA also investigates those things, the ATF pretty much does the same thing as the FBI as well and so on. Why have so many different agencies that besides a few minor things, mainly investigate the same things? I understa... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/c5wrgh/eli5_why_does_the_us_have_so_many_federal_law/ | {
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"The FBI also investigated domestic terrorism and kidnapping, the DEA operates overseas. They have different missions and objectives.\n\nThe ATF and DEA might be merged into a sin... | [] | [] | [
[],
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2v1k4z | how come only some parts of a city highway have streetlights? | Sometimes huge sections of a highway will have lights and sometimes it won't. Why are there lights anyways. If it isn't deemed necessary for all parts of a highway why is necessary for some parts? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2v1k4z/eli5_how_come_only_some_parts_of_a_city_highway/ | {
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"They go in at intersections, interchanges, and other higher traffic volume areas, to make lane changes and merging safer. It's not worth the cost to light all parts of every freeway. Plus, highway lights damage crops, so their use is discouraged... | [] | [] | [
[]
] | |
nf4b7 | Is there an evolutionary advantage to having a good singing voice? | I know some animals have mating calls and stuff- did humans?
(I was homeschooled by my christian parents, so I don't really know much about evolution) | askscience | http://www.reddit.com/r/askscience/comments/nf4b7/is_there_an_evolutionary_advantage_to_having_a/ | {
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"http://endo.endojournals.org/content/128/3/1532.short"
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[],
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[],
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"http://onlinelibrary.wiley.com/doi/10.1002/ajhb.21079/full",
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156e7y | Can only gravity *slow* down a spacecraft? | As I understand it, Gravity can be used to slingshot a spacecraft and make it go faster - if this is the case, is there a way to interact with gravity to make a spacecraft slow down *without interacting with a stellar body or transfer of energy from mass to mass* (i.e. crashing into a planet will obviously stop the spa... | askscience | http://www.reddit.com/r/askscience/comments/156e7y/can_only_gravity_slow_down_a_spacecraft/ | {
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"You can do the gravity assist in reverse to get rid of speed. This has been done by many probes travelling to inner solar system.\n\nI wrote a fairly lengthy [response](_URL_0_) to a gravity assist que... | [] | [
"http://en.wikipedia.org/wiki/Dynamical_friction"
] | [
[
"http://www.reddit.com/r/askscience/comments/13if8l/how_fast_can_man_made_crafts_go_using_planetary/"
],
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"http://en.wikipedia.org/wiki/Gravity_assist"
],
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] | |
crcmq2 | why is the "t-pose" the default pose used when animating 3d models? why is this pose easier to work with then others? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/crcmq2/eli5_why_is_the_tpose_the_default_pose_used_when/ | {
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"The \"T-Pose\" isn't easier to animate with, the reason it was used it because it kept joints in the body away from other joints in the body (ie the upper arm bone, or humerus, is a good distance away from the spine bone, etc). This was useful ... | [] | [] | [
[]
] | ||
fsh70q | How do anti-inflammatories work exactly? | Do they tell our brain "hey, that body part isn't really having trouble, don't worry about it!", do they block pain transmitters or do they actually go there and fix the problem (how?)? And how do they know where exactly to go? | askscience | https://www.reddit.com/r/askscience/comments/fsh70q/how_do_antiinflammatories_work_exactly/ | {
"a_id": [
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"score": [
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"text": [
"In inflammation, an enzyme called COX2 is upregulated which increases the production of prostoglandins that have a number of functions, among which binding to receptors on nerves that then causes the perception of pain and can induce fever. Non-s... | [] | [] | [
[]
] | |
216dz8 | How much is actually known about Rurik, the legendary Varangian founder of Russia? | Did he really exist? If so, how did he establish his rule over the Slavs? Were the nobles of the Rurikid family actually descended from him, or was this just a myth to legitimize their authority? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/216dz8/how_much_is_actually_known_about_rurik_the/ | {
"a_id": [
"cgadar4"
],
"score": [
4
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"text": [
" > Did he really exist?\n\nThe answer, as you might suspect, is that it is unclear. \n\nOur earliest surviving reference to Rurik comes from the Russian Primary Chronicle which was compiled by Russian monks between 1037 AD and 1118 AD.\n\nHowever... | [] | [] | [
[
"http://fmg.ac/Projects/MedLands/RUSSIA,%20Rurik.htm#_ftn3",
"http://books.google.com/books?id=hEawXSP4AVwC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false"
]
] | |
7x6mab | Why is the dutch colonial legacy in Indonesia so much more muted than the colonial legacy of other powers? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7x6mab/why_is_the_dutch_colonial_legacy_in_indonesia_so/ | {
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"I answered a closely related question in the following thread, and perhaps that is helpful.\n\n_URL_0_",
"If we are going to talk about the Dutch language and culture in the former Dutch East Indies, we have to also talk... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/6wgwch/english_is_ubiquitous_in_india_but_dutch_has/"
],
[
"https://www.forbes.com/sites/realspin/2014/11/06/the-problem-with-the-english-language-in-india/#56e64a2f403e",
"http://www.nytimes.com/2011/02/17/world/asia/17iht-letter17.html?mcubz=0",
... | ||
ax5zch | History and thought process behind Seppuku | I'm new to Japanese history and recently picked up the Historical Fiction book Taiko by Eiji Yoshikawa. A few examples of Seppuku presents itself, but I find some of the reasons baffling and I'm now fully aware just how much I don't understand about Japanese culture!
A great example is when Hirate Kiyohide tires of ad... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ax5zch/history_and_thought_process_behind_seppuku/ | {
"a_id": [
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"There were a variety of motives to committ *seppuku.* In general, *seppuku* is an elite practice, restricted to the samurai class and their families (on a side note, this is what makes the battlefield suicides of ordinary Japanese soldiers in the... | [] | [] | [
[
"http://samuraipodcast.com/seppuku-samurai-suicide-tales-of-the-samurai-1",
"Https://www.tapatalk.com/groups/japanese_history/s-a-podcast-discussion-megathread-faq-t747-s25.html#p5061"
]
] | |
3ma62s | why japanese people have problems with l/r letters? | Been in Japan and heard things like "Herro" (hello) or "Prease" (please), si Im courious
Edit: Thanks linguist guys and others folks for really nice explanation. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ma62s/eli5_why_japanese_people_have_problems_with_lr/ | {
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"text": [
"They have no real L in their vocabulary. It's similar to how Hispanics say Tree instead of Three. Because the concept of the sound Th makes isn't there. Same goes for Japan. This i... | [] | [] | [
[],
[],
[],
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2nrzta | if black friday is all positive revenue why don't they do deals and stuff more often than once a year? | If 'being in the black' is profit for companies, why do they limit their deals to one day of the year? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2nrzta/eli5_if_black_friday_is_all_positive_revenue_why/ | {
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"The idea for black friday is that it is the day when every one starts doing Christmas Shopping. So the deals would not have the same effect on other days "... | [] | [] | [
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blzc6l | why do people in movies/tv make giant slices across their palms for drawing blood (instead of elsewhere) and then go about their business with no discussion of the giant cut across their palm? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/blzc6l/eli5_why_do_people_in_moviestv_make_giant_slices/ | {
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"**Please read this entire message**\n\n---\n\nYour submission has been removed for the following reason(s):\n\n* Discussion of fiction, gaming, fantasy, etc. are not allowed on ELI5 (Rule 2). \n\n\n\n\n---\nIf you would like this removal reviewed... | [] | [] | [
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69uzg7 | how does gyroscopic stability work on a tanks main gun. | I saw a video yesterday of a tank holding a beer on the end of it's main gun while going over bumps and the beer didn't budge. I was wondering what kind of technology would be necessary for this to be possible. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/69uzg7/eli5_how_does_gyroscopic_stability_work_on_a/ | {
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"Gyroscopic sensors detect movement of the tank in 3 dimensions. Computers convert that information into movement of the tank barrel, and signal hydraulic systems to move the gun in the opposite direction.\n\nThe system can't compensate for linear... | [] | [] | [
[]
] | |
6etmhj | why are some cities 'twinned' with eachother? what does it mean for cities to be 'sister cities'? | For example: Lucca, Tuscany is paired with Colmar, France. Birmingham, UK is paired with Chicago, USA and Leipzig, Germany. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6etmhj/eli5_why_are_some_cities_twinned_with_eachother/ | {
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"did2mqe",
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"http://www.oakville.ca/culturerec/sister-city.html"
],
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... | |
1reaan | central banking | I am trying to understand better the situation the united states is in with continuing to print money etc, could you please explain the idea of central banking, and the central bank in the U.S. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1reaan/eli5central_banking/ | {
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"text": [
"That sums up most of it, I just think the debate on these liabilities has abated, since the housing sector has stabilized. The assets were a hot potato, but it has since been cooled. "
]
} | [] | [] | [
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] | |
3usn38 | why do prosecutors go for maximum punishment even when they know they shouldn't? | Prosecutors most of the time push for the harshest penalty possible even when it is not beneficial for anyone. Why do they do this? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3usn38/eli5_why_do_prosecutors_go_for_maximum_punishment/ | {
"a_id": [
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"The defense will fight their hardest to get the lowest penalty they can.\n\nSo if the prosecution pushes for a \"fair\" punishment, the defense will likely bring that down to a lighter punishment - in other words, one that is *not enough*.\n\nBut... | [] | [] | [
[]
] | |
1rdnu4 | how do we detect light when our eyes are closed? | . | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rdnu4/eli5_how_do_we_detect_light_when_our_eyes_are/ | {
"a_id": [
"cdm6qc8"
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"text": [
"Closing your eyes doesn't shut off your eyeballs. Light can still go through your skin. For proof take a small flashlight and push it against one of your fingers. Your finger will seem to glow"
]
} | [] | [] | [
[]
] | |
4j6rjn | how does the word rem (rapid eye movement) have anything to do with sleeping? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4j6rjn/eli5_how_does_the_word_rem_rapid_eye_movement/ | {
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"text": [
"REM is a stage of sleep during which your eyes literally move rapidly under closed lids. Eyes can move rapidly any time, of course, but the term REM is associated with sleep because that name was given specifically to that stage of sleep."
]
} | [] | [] | [
[]
] | ||
4ad6ao | whats the difference between key and push-to-start engines ? why do expensive/luxury rides have push-to-start engines ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ad6ao/eli5_whats_the_difference_between_key_and/ | {
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"Push-to-start is more expensive. A standard key just fits in the tumblers like a door lock; for the newer key fobs where you insert a nub, the car's computer reads the digital signature of the key; for ... | [] | [] | [
[],
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41q2an | how do rental car companies make most of their money? | I rented a compact car this weekend from Dollar in Spokane, drove it over 1,000 miles and it was only $11/day. Around Christmas I rented a full-size car in Albuquerque for a week at $14/day. I know it is very competitive market and non-compact models are quite a bit more but I am perplexed at how they make any money. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/41q2an/eli5how_do_rental_car_companies_make_most_of/ | {
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"Because most people don't drive anywhere near that much. Wear an tear on most cars can be estimated at 50 cents ... | [] | [] | [
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1373oc | What is it about the triple bond in nitrogen molecules that makes it so inert? | It seems like something a lot of people take for granted but I keep hearing people say Nitrogen gas is inert because of its triple bond, with the implication being that more bonds means greater strength. However, nothing I have learned so far in chemistry (I'm a biologist so not much) has suggested that there is any co... | askscience | http://www.reddit.com/r/askscience/comments/1373oc/what_is_it_about_the_triple_bond_in_nitrogen/ | {
"a_id": [
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"text": [
"In terms of bond energies, triple bonds have a higher energy than double bond, which is in turn higher than single bonds. This tells us that triple bonds _require_ more energy to break. On that basis alone, you might think that triple bonds are i... | [] | [] | [
[]
] | |
1mbkjx | liberal, conservative, left-wing and right-wing | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1mbkjx/eli5_liberal_conservative_leftwing_and_rightwing/ | {
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"text": [
"Left-wing > Liberal > Moderate < Conservative < Right Wing\n\nLeft wing is communism/socialism esque beliefs\nLiberal is socialism/equality beliefs\nModerate is middle group\nCons... | [] | [] | [
[],
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85twug | how does the extinction of the northern white rhino actually impacts the planet? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/85twug/eli5_how_does_the_extinction_of_the_northern/ | {
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"Going from three individuals to zero isn't going to make a difference now, that ship already sailed when the species' numbers collapse... | [] | [] | [
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2r3d2n | the probability of an event happening in a specific moment. | Say I have a galactical timer that has an infinite number of digits showing at its screen, I know that's not very plausible but just bare with me. It's running and at a specific moment, I decide to stop it. I can read a value on the screen, indicating the time that has passed since the moment I started my timer.
It s... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2r3d2n/eli5_the_probability_of_an_event_happening_in_a/ | {
"a_id": [
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"The probability of a specific time is, in fact, zero. But here's the quinky dink: zero probability does *not* mean impossible, and you've stumbled onto a pretty classic demonstration of why.\n\nThe problem is that probability is only required to ... | [] | [] | [
[]
] | |
3yqyi2 | if we want to increase the value of a currency, why don't we just stop printing that currency? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3yqyi2/eli5if_we_want_to_increase_the_value_of_a/ | {
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"text": [
"We don't want to just increase the value of currency we want a stable currency. We do not want run away inflation or deflation. Both can cause major issues to an economy. ",
"... | [] | [] | [
[],
[],
[],
[
"https://youtu.be/XNu5ppFZbHo?t=1m50s"
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5xdl6x | what happens if i do not tip in the us? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5xdl6x/eli5_what_happens_if_i_do_not_tip_in_the_us/ | {
"a_id": [
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"score": [
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2
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"text": [
"Nothing. If they provide horrible service. Then don't tip. It's not a requirement to leave gratuity.",
"Nothing will happen to you, except you'll look like a jackass.\n\nThe server however will be going home with less mo... | [] | [] | [
[],
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] | ||
6o6pv4 | How did early Texas ranches feed their cattle through the winter? | I understand that keeping cattle through the winter in temperate climates generally involves feeding them hay. Indeed this is the whole point of hay; it's why hay technology was developed.
So how did early Texas cattle ranches, with their enormous herds, get all that hay?
Before the railroad came through, I imagine i... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6o6pv4/how_did_early_texas_ranches_feed_their_cattle/ | {
"a_id": [
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"text": [
"Really interesting question here, and it made me want to learn more. In 1850, the U.S. Commissioner of Patents (the Department of Agriculture was not created until 1862) [posted a fascinating report from a rancher in northeast Texas](_URL_0_), w... | [] | [] | [
[
"https://books.google.com/books?id=OWVGAQAAIAAJ&dq=%22Report%20of%20the%20Commissioner%20of%20Patents%20for%20the%20Year%201850%22&pg=PA189#v=onepage&q&f=false"
]
] | |
4muq3m | why aren't jobs generally rewarded based on their required effort? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4muq3m/eli5_why_arent_jobs_generally_rewarded_based_on/ | {
"a_id": [
"d3yfybl",
"d3yg4ye",
"d3ygp0i"
],
"score": [
11,
5,
18
],
"text": [
"Jobs are rewarded based on supply and demand.\n\nAn unpleasant job that doesn't add much value will pay higher than a more pleasant one that adds a similar amount of value. However, the CEO of a compa... | [] | [] | [
[],
[],
[]
] | |
3352sm | why do so many americans take prescription drugs? | According to the [CDC website](_URL_0_) nearly 50% of adults take at least one form of prescription medication. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3352sm/eli5why_do_so_many_americans_take_prescription/ | {
"a_id": [
"cqhlg98"
],
"score": [
11
],
"text": [
"Because most prescription medications improve quality of life, and the people taking them can afford to do so."
]
} | [] | [
"http://www.cdc.gov/nchs/fastats/drug-use-therapeutic.htm"
] | [
[]
] | |
1q1k0i | During the early 1800s was there a certain type of abolitionist who believed that slavery should be outlawed in the North but allowed in the south? | During the early 1800s was there a certain type of abolitionist who believed that slavery should be outlawed in the North but allowed in the south?
Does anyone have proof that this type of abolitionist thought existed? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1q1k0i/during_the_early_1800s_was_there_a_certain_type/ | {
"a_id": [
"cd88k69"
],
"score": [
3
],
"text": [
"I've never heard of such a thing. For the early 1800s, we should use the word \"emancipationist\" instead of \"abolitionist.\" Abolitionists wanted the immediate, uncompensated end of slavery. They didn't really emerge until the 1830s with Willia... | [] | [] | [
[]
] | |
17k5r3 | how can nerves be reconnected, but not repaired? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/17k5r3/how_can_nerves_be_reconnected_but_not_repaired/ | {
"a_id": [
"c86akjl",
"c86bd9q",
"c86cncv"
],
"score": [
12,
2,
2
],
"text": [
"It's like a wire. You can kinda *splice* the nerves back together, but you can't run new wire to places where the old stuff died.\n\nBut, you say, nerves are so complex! How do they put them back toget... | [] | [] | [
[],
[],
[]
] | ||
84utya | why is toys r us the company responsible for the debt required to buy itself out? | So the way I understand how buyouts work a person or group of people buy up all the available shares of a company so that it's no longer publicly traded. What I don't understand is why Toys R Us is responsible for the money spent in the 2005 deal by outside investors to buy itself. It seems a little strange to me that ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/84utya/eli5_why_is_toys_r_us_the_company_responsible_for/ | {
"a_id": [
"dvsjhgd",
"dvsm4wb"
],
"score": [
7,
7
],
"text": [
"That's how leverages buy outs work. The debt is on the company and secured by the assets of the company. Rates are higher but lower risk for investors since they are limited to losing their equity investment. ",
"Because... | [] | [] | [
[],
[]
] |
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