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 |
|---|---|---|---|---|---|---|---|---|---|
w2uey | Are anti-particles particles with a negative time value and that is why they are "destroyed" when they interact with normal matter with a positive time value? | I am not a physicist, but a physician. I heard one of my patients say this and thought it was too interesting a concept not to get further opinions on it, so better to ask reddit. | askscience | http://www.reddit.com/r/askscience/comments/w2uey/are_antiparticles_particles_with_a_negative_time/ | {
"a_id": [
"c59qgno"
],
"score": [
3
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"text": [
"[Searched](_URL_0_)\n\nRelevant [discussion](_URL_5_)\n\nOriginal question by [mindule](_URL_3_)\n\n > If antiparticles move backwards through time (Feynman–Stueckelberg interpretation), how can we produce/contain them for any length of time?\n\n... | [] | [] | [
[
"http://www.reddit.com/r/askscience/search?q=antiparticles+time&restrict_sr=on&sort=relevance",
"http://www.reddit.com/user/djimbob",
"http://www.reddit.com/user/Amarkov",
"http://www.reddit.com/user/mindule",
"http://www.reddit.com/r/askscience/comments/gpfyn/if_antiparticles_move_bac... | |
32dzoy | why does water not enter my nostrils when i go into the pool? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/32dzoy/eli5_why_does_water_not_enter_my_nostrils_when_i/ | {
"a_id": [
"cqabkja"
],
"score": [
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"text": [
"It's sorta like holding the top of a straw when you put the other end in a drink. The air that's there can't go anywhere, so the liquid can't enter. \n\nThat, and I'm always holding my nose shut underwater. "
]
} | [] | [] | [
[]
] | ||
1ujlkq | why do some english-speakers pronounce the letter 'r' like a 'w'? | Edit: Thanks for the responses - enjoyed reading all of the stories that were posted, and thanks to /u/Jontster, /u/Kseeg, /u/bks33691 & /u/maleslp for explaining this to me | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ujlkq/eli5_why_do_some_englishspeakers_pronounce_the/ | {
"a_id": [
"ceiqizp",
"ceiqquk",
"ceisxn3",
"ceisz2i",
"ceit6bo",
"ceite5i",
"ceitkoo",
"ceiuopy",
"ceiusf0",
"ceivf4a",
"ceivhly",
"ceivrrf",
"ceiwzzl",
"ceixohi",
"ceiy0ud",
"ceiyg6i",
"cej01cs",
"cej0yj3",
"cej45tu",
"cejhp9v"
],
... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Rhotacism"
],
[],
[],
[],
[
"http://www.asha.org/public/speech/disorders/speechsounddisorders/",
"http://calleteach.wordpress.com/2010/01/10/sounds-of-english-nasals-liquids-glides/"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
... | |
1vdqu1 | how can i be watching a movie from the 1970's in blu-ray? | I was watching Alien [1979] the other day on Blu-ray when I realized, how can this be better than HD quality? Wasn't it filmed before 1979 when HD cameras didn't exist? It still looked good, but is it worth buying over a DVD version? I feel like there had to be a quality cap at the time of filming. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vdqu1/eli5_how_can_i_be_watching_a_movie_from_the_1970s/ | {
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"score": [
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2,
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"text": [
"Old movies were filmed on actual film, which is far higher resolution even than HD. A huge amount of resolution is lost when you down-convert film to any commercial digital format.... | [] | [] | [
[],
[],
[],
[]
] | |
6j2yxn | why is sears holding doing so poorly and about to die? | Here in SoCal, their stores seem to be doing fairly well. However, it seems that every other week I'm hearing of their impending demise. Any explanation why? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6j2yxn/eli5_why_is_sears_holding_doing_so_poorly_and/ | {
"a_id": [
"djb2jk8",
"djb2r4x",
"djb67qk"
],
"score": [
3,
39,
7
],
"text": [
"The simple answer is more and more people are preferring online shopping to brick and mortar stores. Other businesses have already been doing that for years, and they do it better than the ones who are... | [] | [] | [
[],
[],
[]
] | |
5cdnjj | what do we know about gravity waves? and what can hope to accomplish should we master harnessing it and manipulating it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5cdnjj/eli5_what_do_we_know_about_gravity_waves_and_what/ | {
"a_id": [
"d9vojs1",
"d9vok9e"
],
"score": [
3,
2
],
"text": [
"\nGravity is the weakest of all forces. It takes something the size of the earth, 6 trillion trillion kilograms, just to exert 180 lbs of force on my body. \n\nSo it's difficult to imagine engineering applications for suc... | [] | [] | [
[],
[]
] | ||
53gv3z | how big of a space telescope in relation to the jwst would we need to take surface images of the exo-planet proxima centauri b that are comparable to pictures we have of jupiter etc. | ^ | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/53gv3z/eli5_how_big_of_a_space_telescope_in_relation_to/ | {
"a_id": [
"d7t0lia",
"d7t15ze"
],
"score": [
3,
2
],
"text": [
"Well, the camera on Juno has a resolution of 15 km per pixel.\n\n_URL_0_\n\nIn order to get the same resolution for proxima Centauri B (4.2 lightyears away), we need an angular resolution of x = 3.78×10^-13 radians.\n\nFor c... | [] | [] | [
[
"https://en.wikipedia.org/wiki/JunoCam"
],
[]
] | |
3f7t7m | Who exaltly was Bill Slim and why is the Burma Campaign known as the forgotten war? | I mean I've (very vaguely) heard about the Battles of Imphal and Kohima but I can't find much about the man credited with the victories. Also why is little said about the campaign as a whole? I've been told that Imphal and Kohima were the worst field defeat Japan's ever suffered (which is ironic as I've also been told ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3f7t7m/who_exaltly_was_bill_slim_and_why_is_the_burma/ | {
"a_id": [
"ctm49xe",
"ctme5vx"
],
"score": [
7,
2
],
"text": [
"William 'Bill' Slim was a British General who famously commanded the 14th Army, also known as the 'FBI' (Forgotten Boys in India) in WWII. He's generally considered one of the best, if not the best, British Generals of the w... | [] | [] | [
[],
[]
] | |
1pofq7 | why do i need a strong password? why can't i just use whatever password i like and take on the responsibility if my account is broken in to? | Some sites that I use I couldn't care less if broke in to my account (wolframalpha for instance). Yet all these sites have absurd password restrictions. Sometimes it seems that the more I don't care about the password, the more restrictions it has. For instance my university has a requirement that if your password is u... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1pofq7/eli5_why_do_i_need_a_strong_password_why_cant_i/ | {
"a_id": [
"cd4c319",
"cd4cfd0",
"cd4fys9"
],
"score": [
3,
15,
2
],
"text": [
"For a lot of places, getting hacked into isn't just going to affect YOU, it's going to affect other people as well. Basically any account that has email addresses or information or anything could poten... | [] | [] | [
[],
[],
[]
] | |
161arp | What does it mean when people talk of infinitely dimensioned space (Hilbert space)? | askscience | http://www.reddit.com/r/askscience/comments/161arp/what_does_it_mean_when_people_talk_of_infinitely/ | {
"a_id": [
"c7rr0tn",
"c7rujnq"
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"score": [
18,
5
],
"text": [
"It means that there are an infinite number of degrees of freedom. Alternatively, that no finite subset of the space spans the space. Given any finite collection of vectors, there will be some other vector which is linearly ... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Hilbert_space"
],
[
"http://en.wikipedia.org/wiki/Cauchy_sequence"
]
] | ||
5gdnf7 | when scientists say that your dna can change based on outside influences, what does that mean and how does that work? | ELI5: when scientists say that your DNA can change based on outside influences, what does that mean and how does that work?
So for example, does my taste in certain foods, change my DNA? Does my interest in certain women change my DNA?
If I have unprotected sex, thats an outs... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5gdnf7/eli5_when_scientists_say_that_your_dna_can_change/ | {
"a_id": [
"darerdq",
"darft4d",
"dargh3s"
],
"score": [
2,
2,
4
],
"text": [
"im guesssing a decent example could be viruses.\n\nhiv and other retroviruses inject dna/rna into the new host and change it, the virus dna will forever be within the hosts dna.",
"Well mutations ha... | [] | [] | [
[],
[
"http://www.nature.com/nrg/journal/v12/n7/full/nrg3028.html",
"http://www.nature.com/npp/journal/v38/n1/full/npp2012185a.html"
],
[
"https://en.wikipedia.org/wiki/Epigenetics#Genomic_imprinting"
]
] | |
xruip | mars time | During a NASA press conference today scientist and engineers kept mapping out a mission timeline in reference to local or mars time. what is that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/xruip/eli5_mars_time/ | {
"a_id": [
"c5p0ww8"
],
"score": [
7
],
"text": [
"Mars spins slightly slower than the earth. A day on Mars is called a *Sol* and lasts 1^d 0^h 37^m 22.663^s , [NASA adjusts their timekeeping accordingly](_URL_0_)."
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Timekeeping_on_Mars"
]
] | |
4zdcki | why do all ants bump their heads whenever they go opposite ways? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4zdcki/eli5_why_do_all_ants_bump_their_heads_whenever/ | {
"a_id": [
"d6ut7o4",
"d6ut85v"
],
"score": [
2,
5
],
"text": [
"They are tasting/smelling each other, to ensure that they are from the same group. If strangers show up, the ants don't want to let them into the group.",
"Do you mean when they are traveling in opposite directions and t... | [] | [] | [
[],
[]
] | ||
75yb2u | why are pain meds like vicodin so much different from otc drugs like ibuprofen? | Why are stronger pain meds more likely to affect you mentally, and they have warnings against operating machinery, driving, etc, but things like ibuprofen and aspirin don't affect you the same way? Do all pain meds work the same way? Is Vicodin or codeine basically just like taking a ton of ibuprofen? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/75yb2u/eli5why_are_pain_meds_like_vicodin_so_much/ | {
"a_id": [
"do9u7f1"
],
"score": [
5
],
"text": [
"They affect different chemical receptors. \nVicodin, codiene, morphine and other opiods/opiates have an effect on dopamine production/receptors in the body which are also responsible for \"good\" feelings and can suppress the feelings of pain. Ib... | [] | [] | [
[]
] | |
bnq1wq | why is it that when a camera films confetti or snowflakes falling, the quality decreases hugely? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bnq1wq/eli5_why_is_it_that_when_a_camera_films_confetti/ | {
"a_id": [
"en85947",
"en85sx2"
],
"score": [
8,
2
],
"text": [
"[This Tom Scott video](_URL_0_) answers this exact question. \n\nBasically, it's about video compression. Video compression works by storing only (well, mostly) the changes between consecutive frames. If there's a lot of cha... | [] | [] | [
[
"https://www.youtube.com/watch?v=r6Rp-uo6HmI"
],
[]
] | ||
3h3rna | why do our muscles hurt when we sleep on them weird? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3h3rna/eli5_why_do_our_muscles_hurt_when_we_sleep_on/ | {
"a_id": [
"cu3zvqh"
],
"score": [
2
],
"text": [
"Because you slept on them weird. They were forced to maintain a position they wouldn't normally maintain, for an extended period of time, with an unusual amount and distribution of weight. Your forearm wasn't meant to have the weight of your tors... | [] | [] | [
[]
] | ||
b5rnyd | how are roots able to break through asphalt roads ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b5rnyd/eli5_how_are_roots_able_to_break_through_asphalt/ | {
"a_id": [
"ejfd8os",
"ejfgicn",
"ejfiucu"
],
"score": [
4,
2,
4
],
"text": [
"moisture causes cracks which will disrupt soil under the material..if there is a root nearby water will make it grow...",
"The roots lift the asphalt as they grow beneath it. Depending on how big an... | [] | [] | [
[],
[],
[]
] | ||
3ptxys | Why do we use microwaves to heat food? | Why do we use microwaves to heat food? Why not IR, or UV, which have higher frequencies/more energy? | askscience | https://www.reddit.com/r/askscience/comments/3ptxys/why_do_we_use_microwaves_to_heat_food/ | {
"a_id": [
"cw9jwnh",
"cw9kl6a",
"cw9l0o9"
],
"score": [
18,
3,
6
],
"text": [
"Microwaves penetrate deeply, are easy to produce, and are conveniently harmless.\n\nInfrared ovens exist and we call them toaster ovens. However, it only heats the surface of food because most food is ... | [] | [] | [
[
"http://www.emu.dk/sites/default/files/physics_of_microwave_oven.pdf"
],
[],
[]
] | |
5fhqqj | the final fantasy video game series | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5fhqqj/eli5_the_final_fantasy_video_game_series/ | {
"a_id": [
"dakbjz6",
"dakbktl"
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"score": [
3,
2
],
"text": [
"No, they're not all connected. Most of them are standalone stories, in fact. There are a handful of paired games, where the setting and sometimes characters are the same, but for the most part they're independent of each o... | [] | [] | [
[],
[]
] | ||
4crdxw | If there's old English, are there older versions of other languages like Spanish, German, Russian, Chinese etc? Did they sound very different as their modern counterparts? And have some languages barely changed or even not at all? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4crdxw/if_theres_old_english_are_there_older_versions_of/ | {
"a_id": [
"d1ktzt8",
"d1kuval",
"d1kxyay",
"d1kyjnn"
],
"score": [
2,
2,
12,
2
],
"text": [
"I do not know much about European languages, but I can tell you about the Arabic language. \n\nSince the introduction of the Quran, the Written Arabic Language did not see much ch... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Old_High_German"
]
] | ||
530jfn | Why is "speed of light" the only time where a speed is used to quantify a distance? i.e. lightyears | askscience | https://www.reddit.com/r/askscience/comments/530jfn/why_is_speed_of_light_the_only_time_where_a_speed/ | {
"a_id": [
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"d7ozavi",
"d7ozt29"
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"score": [
12,
4,
2,
3,
54
],
"text": [
"The speed of light is a speed with units [L/T]. The lightyear has a unit of distance [L] and is defined by the distance traveled by light in one year, thus ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
vkiy7 | What would happen if a human was hit by an electron near lightspeed? | I'm curious what would happen to my body if I was shot with a single electron near lightspeed out of the LHC for example. Would I turn into a red gushing mess? Would I even feel a thing? This has bothered me for quite some time. | askscience | http://www.reddit.com/r/askscience/comments/vkiy7/what_would_happen_if_a_human_was_hit_by_an/ | {
"a_id": [
"c559ye9",
"c559yxq",
"c559z3l",
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"score": [
16,
8,
5,
5
],
"text": [
"The LHC is a proton-proton collier, I'm pretty sure. But let's say we have an electron with the same energy as an LHC proton--that's 7 tera-electron volts (TeV). An electron volt ... | [] | [] | [
[
"http://www.wolframalpha.com/input/?i=7+teraelectronvolts&lk=4",
"http://www.youtube.com/watch?v=lVefgfmFg9o"
],
[
"http://en.wikipedia.org/wiki/External_beam_radiotherapy"
],
[
"http://www.todayifoundout.com/index.php/2010/03/what-happens-when-you-stick-your-head-into-a-particle-accel... | |
ioiao | Could someone give me some simple explanations of the theories about what the universe exists in? | I figure someone here could do a good job of explaining some of the theories to a non-physicist. | askscience | http://www.reddit.com/r/askscience/comments/ioiao/could_someone_give_me_some_simple_explanations_of/ | {
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"c25de1e",
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"c25eibf",
"c25g5um"
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"score": [
4,
9,
9,
2,
4,
3
],
"text": [
"\"What the universe exists in?\" Please clarify what you mean by that.",
"There are none. The universe is all there is (pretty much ... | [] | [] | [
[],
[],
[],
[],
[
"http://www.simulation-argument.com/"
],
[]
] | |
25l8fh | how wrestlers can eat a ton of punches and not get knocked out but ufc fighters can get knocked out in a simple punch. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/25l8fh/eli5_how_wrestlers_can_eat_a_ton_of_punches_and/ | {
"a_id": [
"chi9ru9"
],
"score": [
2
],
"text": [
"Professional wrestling is staged. Think of it like a live stunt show. The punches pro wrestlers throw at each other are \"pulled\" punches, which means either the punch doesn't actually connect with the opponent, or the punch isn't really solid.\... | [] | [] | [
[
"https://www.youtube.com/watch?v=z5pFRq8WgN0"
]
] | ||
69is5f | Are there any books on the Spanish Empire? I can't seem to find any... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/69is5f/are_there_any_books_on_the_spanish_empire_i_cant/ | {
"a_id": [
"dh6xc7e"
],
"score": [
3
],
"text": [
"The AskHistorians Books and Resources list has a [small section on Spain and the Spanish Empire](_URL_0_) that you could check out."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/wiki/books/europe#wiki_spain_and_the_spanish_empire"
]
] | ||
a3ehqs | How does human body excrete radioactive materials once they have been inhaled and/or ingested? | For example, if a cigarette smoker would stop smoking today and we only take Po210 and Pb210 (those reside on tobacco) in consideration in the lungs, will the body eventually excrete these materials, some of them, or none at all? | askscience | https://www.reddit.com/r/askscience/comments/a3ehqs/how_does_human_body_excrete_radioactive_materials/ | {
"a_id": [
"eb7kbaj",
"eb7knt3"
],
"score": [
3,
2
],
"text": [
"Stuff in the lungs isnt excreted, anything foreign, I can tell you ask a smoker of a few things over the years, you will end up coughing out.\n\nI'm not aware if the radioactive elements build up to more risky levels compare... | [] | [] | [
[],
[]
] | |
1ackkf | "organic" compounds? | Oblivious to Chemistry.
Edit; Thanks! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ackkf/eli5_organic_compounds/ | {
"a_id": [
"c8w3n6t"
],
"score": [
7
],
"text": [
"Organic materials in a strictly chemical sense means: the molecules contain carbon (C) atoms.\n\nThere is some exception to this rule: generally CO2, diamond, graphene and a few others are considered inorganic (that's just the opposite). This has... | [] | [] | [
[]
] | |
1gtsax | To what extent (if any) were Romans involved in the second Greco-Persian war. | One of my favorite works of (historical?) fiction is *Soldier in the Mist* by Gene Wolf. The story is presented as the recovered diary of Latro, a Roman mercenary who fought for Xerxes at the Battle of Plataea.
1) How plausible is the idea of a Roman mercenary fighting for the Persians?
2) At one point Latro witnesse... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1gtsax/to_what_extent_if_any_were_romans_involved_in_the/ | {
"a_id": [
"canuoz5"
],
"score": [
16
],
"text": [
"1) It's not very plausible. Herodotos gives a detailed listing of ethnic groups in Xerxes' army, and while there's a lot to doubt in his account, that doesn't mean a historian should make stuff up (obviously it's different for a novelist!). The ... | [] | [] | [
[
"http://www.classicpersuasion.org/pw/thucydides/jthucbk4rv2.htm#4.80"
]
] | |
7ccv9n | In terms of light production vs energy consumption, how much more efficient are modern LEDs than CFLs? What's the limit to increasing efficiency in future years? | askscience | https://www.reddit.com/r/askscience/comments/7ccv9n/in_terms_of_light_production_vs_energy/ | {
"a_id": [
"dpp78j3",
"dpqpwmh"
],
"score": [
3,
2
],
"text": [
"Wikipedia article on [luminous efficacy](_URL_0_)\n\n",
"So this is irrelevant for lumens for lighting for human use, but I work with indoor plants and the efficiency of LEDs over CFLs for producing PAR watts (what the p... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Luminous_efficacy"
],
[]
] | ||
79phaf | Will a puddle of water stay there forever if the surrounding air humidity is stable at 100% (saturated)? | askscience | https://www.reddit.com/r/askscience/comments/79phaf/will_a_puddle_of_water_stay_there_forever_if_the/ | {
"a_id": [
"dp4kfg4"
],
"score": [
4
],
"text": [
"Yes. Water has a certain vapor pressure depending on temperature. When the ambient pressure is greater than the vapor pressure, condensation will occur. If the ambient pressure is lesser, evaporation will occur.\n\nAs long as there is enough wate... | [] | [] | [
[]
] | ||
5ykloz | How can a country have a trade deficit every year without running out money? | I'm specifically talking about the US. What is being depleted each year, if any? | askscience | https://www.reddit.com/r/askscience/comments/5ykloz/how_can_a_country_have_a_trade_deficit_every_year/ | {
"a_id": [
"deqv4to",
"deqyufo",
"der2s6j",
"derdvnt",
"dernfcn"
],
"score": [
4,
2,
13,
2,
2
],
"text": [
"Cause money is virtual and isn't linked to something material anymore.\n\nWhen a country is running out of money, it just ask for more on the market and some... | [] | [] | [
[],
[],
[
"http://cdn.tradingeconomics.com/charts/venezuela-balance-of-trade.png?s=vnbcbal&v=201702081418t"
],
[],
[]
] | |
1p3qib | how am i able to continue to sing a song, without being conscious i'm doing so, whilst being deep in thought about something else? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1p3qib/eli5_how_am_i_able_to_continue_to_sing_a_song/ | {
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"I'd assume it's because it's become muscle memory, in the same way as touch typing or any physical other activity works?\n\nI touch type, and I don't consciously think 'I want to press the c button, so I have to put my finger here, and then pre... | [] | [] | [
[]
] | ||
4m5bs8 | why can our bodies develop resistance to harsh viruses such as the flu, but poison ivy still plagues many of us each year? | If our bodies can develop antibodies and immunities to rapidly changing viruses such as the flu, why can't we quickly develop a tolerance to a basic plant such as poison ivy which has been around since before mankind? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4m5bs8/eli5_why_can_our_bodies_develop_resistance_to/ | {
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"text": [
"Poison Ivy is harsh ironically because of the immune system's reaction, it actually is not harmful, the irritant in poison ivy is called Urushiol, an oil that acts as an allergen, ... | [] | [] | [
[],
[],
[],
[]
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41jghz | Did German Troops Discharged after WWI Re-Enlist for WWII? | The way I understand things, after WWI the armed forces were pretty well liquidated as terms of surrender. So that would leave a lot of former soldiers without jobs. By WWII Germany was mobilizing its forces. Could these former soldiers re-enlist if they so chose - or were they called back to service? How easy/diff... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/41jghz/did_german_troops_discharged_after_wwi_reenlist/ | {
"a_id": [
"cz2v2lo",
"cz3rcbh"
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"score": [
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4
],
"text": [
"Hi there. Soldiers who served in WW1 certainly did serve for Germany in WW2. The majority of the interwar (and WW2) officer corps had served initially in WW1. Many of these officers were demobilised due to the limit placed ... | [] | [] | [
[],
[]
] | |
4bfuis | what was y2k? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4bfuis/eli5_what_was_y2k/ | {
"a_id": [
"d18qzkm",
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"score": [
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"text": [
"Y2K (or Year 2000) was a huge piece of scare mongering hype in 1999. The popular belief was the at midnight on new years eve all sorts of important computers would crash because they couldn't recognize the year 2000 as an ac... | [] | [] | [
[],
[]
] | ||
2b3uvr | Time for Fossilization? How long does it take? | Considering the footprints found in Romania, figured to be about 36,000 years old. If that person's bones had been found, would they be bones, or would they have been fossilized? How common is it to find a fossil that is still partially bone? | askscience | http://www.reddit.com/r/askscience/comments/2b3uvr/time_for_fossilization_how_long_does_it_take/ | {
"a_id": [
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"text": [
"The fossilization process begins at the time of an organism's death. Rapid burial under sediments is key for the fossilization process to begin. This prevents decomp from bacteria & protects the carcass from scavengers. \n\nAfter the intial pro... | [] | [] | [
[]
] | |
3iv4tl | How come most Caribbean people are from African descent and not mixed like the rest of the Americas? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3iv4tl/how_come_most_caribbean_people_are_from_african/ | {
"a_id": [
"cukh25l"
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"score": [
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"text": [
"Most of us are mixed, though we may not look it. Someone who is 12.5% European and 87.5% African won't necessarily look much like the former. Also, remember that countries like Cuba, the Dominican Republic, and Puerto Rico are Caribbean countries... | [] | [] | [
[]
] | ||
7d6l5l | why do some people think it's beneficial to "alkalize" the body? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7d6l5l/eli5_why_do_some_people_think_its_beneficial_to/ | {
"a_id": [
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"score": [
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3,
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"text": [
"A sufficiently charismatic snake-oil salesman convinced them of it.\n\nMost people don't have much understanding of medicine, biology or science in general. If some huckster starts tossing around fan... | [] | [] | [
[],
[],
[]
] | ||
9xmb4g | at night time, why do windows appear to act as mirrors and lower the visibility through the glass? if you want to see outside the window at night, why is it best to turn out the lights? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9xmb4g/eli5at_night_time_why_do_windows_appear_to_act_as/ | {
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"Glass reflects a certain percentage of light passing through it. When you are on the darker side of the window, the light coming throu... | [] | [] | [
[],
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[],
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2zs8v0 | how is immigration policy determined in the us? why would the us want to limit the number of educated immigrants to the country? | American born citizen here. I have a lot of international friends that have to go through a lot of paperwork and trouble just to study and work here. It got me wondering about the policy on immigration in the United States. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2zs8v0/eli5_how_is_immigration_policy_determined_in_the/ | {
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"text": [
"I am a Canadian citizen, and am in no way an expert on immigration, but i believe that the US places limits on immigration because there is limited resources (housing, jobs, healthcare etc.) that exist ... | [] | [] | [
[],
[
"http://www.us-immigration.com/index.html?referrer=adwords&gclid=CjwKEAjwiq-oBRC9gvHCsvDdn2cSJACV3DFRrADPYTsSGCtEhw8og5VQy15_tZiEoCzafDWL0n0LGxoCr3bw_wcB"
],
[]
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9uxmle | how can the gop win the senate but lose the house? | When people vote don't they vote for their party? Are there people that vote for GOP senators and Dem house members? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9uxmle/eli5_how_can_the_gop_win_the_senate_but_lose_the/ | {
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"text": [
"Some people do vote for candidates individually, not just by party.\n\nBut more importantly, only 1/3 of Senate seats are up for a vote in each 2-year electi... | [] | [] | [
[],
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[],
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] | |
1kj04t | Was Marcus Aurelius' Meditations published in his lifetime? How was he regarded as a leader, in light of his philosophical bent? What is the best English translation of Meditations? | Don't really know how to ask more clearly. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1kj04t/was_marcus_aurelius_meditations_published_in_his/ | {
"a_id": [
"cbpgp6u"
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"score": [
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"text": [
"The *Meditations* wasn't exactly published in any sense that we think of the word. We honestly don't know what he intended, but it seems unlikely that Marcus treated the text as anything other than his diary or journal (a more honest title may b... | [] | [] | [
[
"http://books.google.com/books?id=7SoyXwAACAAJ&dq=The+Romans:+From+Village+to+Empire&hl=en&sa=X&ei=1-4OUtbVNeXV2AXZ6oGIBQ&ved=0CC0Q6AEwAA",
"http://www.amazon.com/The-Meditations-Marcus-Aurelius-Grube/dp/B002JCJRRY",
"http://en.wikipedia.org/wiki/Lucius_Verus",
"http://en.wikip... | |
6j3siw | what is the loudness war and what side am i on? | I hear the term "Loudness War" with respect to recording, but I don't understand what it means. Should I be for or against Loud? What has Loud done to me? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6j3siw/eli5_what_is_the_loudness_war_and_what_side_am_i/ | {
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42,
23,
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"text": [
"You aren't quite on a side. The loudness war was an arms race within the music industry of louder and louder albums. You are collater... | [] | [] | [
[],
[],
[
"https://youtu.be/7UjQc0dM4H4"
],
[],
[
"http://www.johnsongs.com/wpimages/wpaba8c095_06.png"
],
[
"https://youtu.be/6Nfqpr3ygSg"
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8x3fkn | why can my phone with a 4 watt soc play back 1440p video without even getting warm to the touch while my laptop with a much more powerful gpu has to ramp up it's fans and make tons of heat to accomplish the same task. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8x3fkn/eli5_why_can_my_phone_with_a_4_watt_soc_play_back/ | {
"a_id": [
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"score": [
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"text": [
"Probably because your phone has hardware that can decode the video, while your laptop needs to do it via software.",
"Ah yes, Google’s and Apple’s VP9 beef. Blame Apple and/or Google. Whichever you think is guilty.\n\n... | [] | [] | [
[],
[]
] | ||
1rsl1y | In our solar system, or any solar system really, does proximity to their sun determine the size of planets? | It seems like the planets in our solar system are generally larger the further they are away from the sun. Is this pure chance or does something, such as gravity, play a role in how the planets are ordered? For instance, does having a greater distance from the sun allow the planets to accumulate more mass during fo... | askscience | http://www.reddit.com/r/askscience/comments/1rsl1y/in_our_solar_system_or_any_solar_system_really/ | {
"a_id": [
"cdqhm57"
],
"score": [
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"text": [
"In our current standard theory of planetary formation, the planets are most likely formed further out in the protoplanetary disk and migrate inwards after being formed. In our solar system, the small dense rocky planets are closest to our Sun whi... | [] | [] | [
[]
] | |
1yjbie | FAQ Friday: Have you ever wondered how similar different languages actually are? Find out the answer, and ask your own linguistics questions! | We all use language every day, yet how often do we stop and think about how much our languages can vary?
This week on **FAQ Friday** our linguistics panelists are here to answer your questions about the different languages are, and why!
Read about this and more in our [Linguistics FAQ](_URL_0_), and **ask your ques... | askscience | http://www.reddit.com/r/askscience/comments/1yjbie/faq_friday_have_you_ever_wondered_how_similar/ | {
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"cfl7e91",
"cfl86pw",
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"cflh3sl"
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"score": [
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21,
... | [] | [
"http://www.reddit.com/r/askscience/wiki/linguistics",
"http://www.reddit.com/r/askscience/wiki/index#wiki_answering_askscience",
"http://www.reddit.com/r/askscience/search?q=flair%3A%27meta%27&restrict_sr=on&sort=new&t=all"
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[],
[],
[],
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[],
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[],
[],
[],
[],
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7hwj0i | Did the red/black/white color scheme have the same "evil" connotations before the rise and fall of Nazi Germany? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7hwj0i/did_the_redblackwhite_color_scheme_have_the_same/ | {
"a_id": [
"dqute5q"
],
"score": [
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],
"text": [
"From [an earlier answer of mine](_URL_3_)\n\nNo. \n\nThe choice of the Nazi color scheme in their banners was wrapped up in the politics of the German national flag. The flag of the united Germany was the [black-white-red tricolor](_URL_2_) with ... | [] | [] | [
[
"http://www.dhm.de/fileadmin/medien/lemo/images/pli12194_en.jpg",
"https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Flag_of_Germany_%283-2_aspect_ratio%29.svg/900px-Flag_of_Germany_%283-2_aspect_ratio%29.svg.png",
"https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Flag_of_the_German_E... | ||
50kfwx | Was the original ethnicity/ethnicities behind the Olmec civilization physically notably different from the modern Amerindian populations that now inhabit the same area in any way? | I admittedly know far more about later Mesoamerican history than Olmec history, but while I was trying to polish up on research I noticed only superficially that Olmec art seems to show two distinct 'sets' of ethnic type. One is very recognizably Mesoamerican in appearance, such as this [mask](_URL_0_) or the portrait ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/50kfwx/was_the_original_ethnicityethnicities_behind_the/ | {
"a_id": [
"d74vdqc"
],
"score": [
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],
"text": [
"I want to preface what I'm about to say by letting you know that we have a section in our FAQ titled [Travel and contact across the Atlantic before Columbus](_URL_1_) that contain other answers regarding the Olmec-African connection.\n\nThat bein... | [] | [
"https://s-media-cache-ak0.pinimg.com/236x/9c/c6/d5/9cc6d5b444e3f8c8f2e91955e007ca25.jpg",
"https://www.sott.net/image/s2/57660/full/olmec1.jpg",
"http://1.bp.blogspot.com/-A10dgVeTMgc/UvcRYSOpCvI/AAAAAAAAKbU/-8sOqvq3Y4Y/s1600/Olmec+4.jpg",
"https://2.bp.blogspot.com/-jNWUXts0Tzs/UnDxkeFmH2I/AAAAAAAAA5E/EXJZd... | [
[
"https://jsa.revues.org/12294",
"https://www.reddit.com/r/AskHistorians/wiki/nativeamerican#wiki_travel_and_contact_across_the_atlantic_before_columbus",
"http://i.imgur.com/z73Aa8m.png"
]
] | |
30rcvi | how does soap and shampoo "clean" you? could you use shampoo like a soap? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/30rcvi/eli5_how_does_soap_and_shampoo_clean_you_could/ | {
"a_id": [
"cpv29r0",
"cpv92yc"
],
"score": [
3,
4
],
"text": [
"Shampoo is soap. \nSoap encapsulates dirt and greases, making it easier to rinse them off. ",
"It's important to note that soap don't kill bacteria. Soap breaks the surface tension of water and in combination with the r... | [] | [] | [
[],
[]
] | ||
128w99 | Are whales, dolphins and other marine life affected by massive ocean storms? Is it hard for a dolphin to get to the surface for air when waves are 20ft high and the ocean is churning? | askscience | http://www.reddit.com/r/askscience/comments/128w99/are_whales_dolphins_and_other_marine_life/ | {
"a_id": [
"c6t5d62"
],
"score": [
25
],
"text": [
"Sharks will go deep during a hurricane. Low pressure in the atmosphere above the water will reduce pressure under water, fooling them into thinking they are swimming shallower than they are. \n\n_URL_0_\n\n_URL_1_\n\n"
]
} | [] | [] | [
[
"http://www.in-fisherman.com/2011/07/12/weather-pattern-pike/",
"http://www.pbo.co.uk/news/405790/new-research-indicates-that-sharks-react-to-air-pressure-changes-predicting-bad-weather"
]
] | ||
oeogw | Why hasn't the brain evolved to be able to regenerate itself as easily as skin does? In other words why don't brain cells grow back quickly/at all? | askscience | http://www.reddit.com/r/askscience/comments/oeogw/why_hasnt_the_brain_evolved_to_be_able_to/ | {
"a_id": [
"c3gncfa",
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"score": [
11,
10,
4
],
"text": [
"A mature neuron is orders of magnitude more complicated than a skin cell.\n\nIs it as easy to replace an HD television as a lump of concrete the same size?",
"Skins cells are constantly being repl... | [] | [] | [
[],
[],
[]
] | ||
bte8gv | how does the scam in the wolf of wall street work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bte8gv/eli5_how_does_the_scam_in_the_wolf_of_wall_street/ | {
"a_id": [
"eowizsk"
],
"score": [
3
],
"text": [
"The pump and dump scheme? I've only seen the movie once when it first came out, but I'm pretty sure that's what it is. Basically you buy a crapload of low value stocks and create a buzz, causing others to buy which increases the price. Once it hi... | [] | [] | [
[]
] | ||
4d51py | what happens if no candidate gets the needed number of delegates for the republican nomination? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4d51py/eli5_what_happens_if_no_candidate_gets_the_needed/ | {
"a_id": [
"d1nt3di"
],
"score": [
2
],
"text": [
"They vote again until one does, it is a fairly simple process. It is called a contested convention."
]
} | [] | [] | [
[]
] | ||
46o5bo | why would a gravitational wave travel at the same speed as light? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/46o5bo/eli5why_would_a_gravitational_wave_travel_at_the/ | {
"a_id": [
"d06mzyd"
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"score": [
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"text": [
"Calling it the speed of light is sort of a misnomer, really. Instead, there's a speed of causality in the universe that no information can travel faster than. So light travels at the speed of causality, and so do gravitational waves. \n\nFor more... | [] | [] | [
[
"https://www.youtube.com/watch?v=msVuCEs8Ydo"
]
] | ||
4l86k6 | how does this phone holder for your car not break your phone? | Hello Reddit! I want to know how [this phone holder](_URL_0_) works without breaking my phone.
It essentially works by putting a metal plate on the back of my phone and then having a car mounted magnet hold up my phone via magnetic force but I have always heard that you should not put magnets near electronics so how ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4l86k6/eli5_how_does_this_phone_holder_for_your_car_not/ | {
"a_id": [
"d3l4sn8"
],
"score": [
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],
"text": [
"There are two electronics components that are sensitive to magnets: cathode ray tube (CRT) screens and hard drives. Your phone does not have either of those- it has an LED or LCD screen instead of a CRT and uses flash memory instead of a hard dri... | [] | [
"http://www.amazon.com/WizGear-Universal-Magnetic-Swift-SnapTM-Technology/dp/B00PGJWYJ0?ie=UTF8&keywords=phone%20mount%20car&qid=1464305951&ref_=sr_1_1&sr=8-1"
] | [
[]
] | |
kucuy | Ask Science: virtual images vs real images in optics | So I've already read through the comments [here](_URL_0_) but I still don't truly understand virtual images versus real images.
I get that virtual images are made from rays that diverge. But why can't a camera see them?
A camera is just a lens with a screen (CCD, film, etc). Your eye is just a lens with a screen ... | askscience | http://www.reddit.com/r/askscience/comments/kucuy/ask_science_virtual_images_vs_real_images_in/ | {
"a_id": [
"c2nafpi",
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"score": [
4,
4
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"text": [
" > But why can't a camera see them?\n\nA camera can see them just fine. Take a picture of yourself in the mirror. Congratulations! You just photographed a virtual image.\n\nYou may be thinking of the fact that you can't f... | [] | [
"http://www.reddit.com/r/askscience/comments/hgvou/i_cant_seem_to_understand_what_a_virtual_image_is/"
] | [
[],
[]
] | |
27mef8 | how do travel agents get paid? | ELI5: My fiance and I are dealing with a travel agent to plan our wedding and I was wondering how they make money? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27mef8/eli5_how_do_travel_agents_get_paid/ | {
"a_id": [
"ci277jw",
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"score": [
3,
3
],
"text": [
"Aren't you paying this travel agent? \n \nI'm surprised that there still are travel agents. I remember seeing travel agencies in strip malls when i was a little kid but I haven't seen one in years.\n \n",
"Travel agent... | [] | [] | [
[],
[]
] | |
2pmapm | How does a light bulb light up a whole room? | I know the bulb must disperse photons but...
1) What part of the bulb allows the electrical energy it receives to release these photons?
2) How is the movement of these photons measured once they are "created" by the bulb? | askscience | http://www.reddit.com/r/askscience/comments/2pmapm/how_does_a_light_bulb_light_up_a_whole_room/ | {
"a_id": [
"cmy0dnw"
],
"score": [
14
],
"text": [
"For an incandescent bulb, electricity runs through a filament in the middle causing it to heat up through simple Joule heating (essentially, the electrons in the electrical current smash into the atoms in the wire and lose some of their energy t... | [] | [] | [
[]
] | |
1c0tjy | What's the smallest possible number of fundamental units, and what would they be? | I know the SI system has 7, but I was thinking and realized that distance and time are actually the same, aren't they? And a mole is just a numerical multiplier, right? So, how few units could you end up with? | askscience | http://www.reddit.com/r/askscience/comments/1c0tjy/whats_the_smallest_possible_number_of_fundamental/ | {
"a_id": [
"c9c3e30"
],
"score": [
3
],
"text": [
"In principle, you can have only one unit. \n\nThe idea is that some fundamental constants are actually just proportionality factors, so you can just set them as 1. These are the speed of light, Planck's constant and Boltzmann constant. So distanc... | [] | [] | [
[]
] | |
1vri4l | why do many southeast asian countries have such harsh drug laws? | Mandatory capital punishment for trafficking seems excessive. Is there a historical basis for why this part of the world is so hard on drugs? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vri4l/eli5_why_do_many_southeast_asian_countries_have/ | {
"a_id": [
"cev3mjb"
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"score": [
2
],
"text": [
"These countries are are trying to improve their economic standing. They don't want people to steal to get their high, or become homeless, or jobless. They also don't want the children of he area to get addicted to any drugs. That's where most of ... | [] | [] | [
[]
] | |
1sv9n8 | We can create in vitro meat. Is there any research to create in vitro wood? | There are lots of discussion about how we can reduce human impact on the nature. One important point is if we will soon be able to create in vitro meat in commercial quantity. However, maintaining flora on the planet can be of the same importance. Are there any scientific research done to synthetize for example woods? ... | askscience | http://www.reddit.com/r/askscience/comments/1sv9n8/we_can_create_in_vitro_meat_is_there_any_research/ | {
"a_id": [
"ce1p805"
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"score": [
7
],
"text": [
"Never heard of anyone trying to grow in vitro wood. It's possible that someone is doing it somewhere but I doubt there's much money in such a prospect.\n\nThe reason in vitro meat is desirable is because mass animal farming is highly destructive ... | [] | [] | [
[]
] | |
2rv6tx | why do people squeeze lotion onto the back of their hand? | I consistently see people squeeze lotion out onto the back of their hand, even if they then proceed to apply it to their whole hand. I don't see this with hand sanitiser, soap, or anything else. Just lotion. Why do people do this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rv6tx/eli5_why_do_people_squeeze_lotion_onto_the_back/ | {
"a_id": [
"cnjjqy7",
"cnjjsfq"
],
"score": [
2,
2
],
"text": [
"The back of your hand gets dry and cracks the most, and needs as much lotion as possible. After they make sure the back is well covered the rest is dispersed evenly to the rest if the hands. ",
"I would imagine its also ... | [] | [] | [
[],
[]
] | |
63exoa | How did the Teutonic Order justify fighting Catholic Lithuania+Poland? | As I understand it, they were supposed to be there to conquer Pagan Lithuania. Then Lithuania converted to Catholicism. So the Knights... stayed around and tried to mess with the Lithuanians, until eventually they fought a massive battle against the combined Lithuanians and Polish. But how did they justify this? As an ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/63exoa/how_did_the_teutonic_order_justify_fighting/ | {
"a_id": [
"dfv5zwd"
],
"score": [
2
],
"text": [
"Ok so there is a lot going on with this question. \n\nLithuania was a pagan state until the Union of Krew(v)o in 1385-1386.\n\nThe knights that you refer to in your question would be the Teutonic Order, but by the time of the Union of Krewo they ... | [] | [] | [
[]
] | |
9ap5gt | why does driving feel smoother in the drivers seat? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9ap5gt/eli5_why_does_driving_feel_smoother_in_the/ | {
"a_id": [
"e4x08y1"
],
"score": [
9
],
"text": [
"When you know what will happen, your body prepares for it.\n\nHard left, you know exactly when it will happen.\nAceleration, deceleration are the same, you prepare for acceleration when you press gas pedal.\n\nPassengers are surprised when someth... | [] | [] | [
[]
] | ||
1p0r0l | The 3 divisibility rule is if you add up the digits of any number, and the sum you get is divisible why 3, then the larger number is too. Why is this? | askscience | http://www.reddit.com/r/askscience/comments/1p0r0l/the_3_divisibility_rule_is_if_you_add_up_the/ | {
"a_id": [
"ccxkgkw",
"ccxkjyy",
"ccxl704"
],
"score": [
4,
35,
3
],
"text": [
"First of all, observe the following things:\n\n * If a number A is divisible by 3, and number B is divisible by 3, then A + B is divisible by 3\n * If a number A is *not* divisible by 3, and number B i... | [] | [] | [
[],
[],
[]
] | ||
7qr77r | what prevents blood from flowing backwards into an iv bag? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7qr77r/eli5_what_prevents_blood_from_flowing_backwards/ | {
"a_id": [
"dsra0hw",
"dsra620"
],
"score": [
5,
24
],
"text": [
" The fact that the needle is facing away from the direction of the flow, and gravity. Put the bag below your heart, and you'll see blood go back up the tubing into the bag. ",
"Gravity. \n\nThe IV bag hangs above the pa... | [] | [] | [
[],
[]
] | ||
7opxjr | how is it that breasts get slightly bigger then slightly smaller again during 'that time of the month' | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7opxjr/eli5_how_is_it_that_breasts_get_slightly_bigger/ | {
"a_id": [
"dsbe5wk"
],
"score": [
4
],
"text": [
"Progesterone and prolactin are released during your period, which causes breast tissue to swell and milk glands to increase in size. Your body will also retain water which may contribute. "
]
} | [] | [] | [
[]
] | ||
36zbsw | Will the continued acidification of our oceans by CO2 absorption have a notable impact on Earth's oxygen supply? (by causing environmental changes for plankton) | I found [this](_URL_0_) article on the subject from Princeton University, and they say that the reduction in available elements due to lower pH is balanced out by less energy expenditure collecting carbon.
Has this been further concluded? Is there any new research or data on the subject? It struck me that we might be ... | askscience | http://www.reddit.com/r/askscience/comments/36zbsw/will_the_continued_acidification_of_our_oceans_by/ | {
"a_id": [
"criihyi"
],
"score": [
7
],
"text": [
"Are you referring to atmospheric oxygen, oceanic oxygen, or both? Also, are you asking about ocean acidification effects on primary productivity and photosynthesis in the ocean?\nAtmospheric oxygen has indeed been going down as a result of fossil... | [] | [
"http://www.princeton.edu/grandchallenges/energy/research-highlights/ocean-acidification/"
] | [
[
"http://scrippso2.ucsd.edu/plots",
"http://rsta.royalsocietypublishing.org/content/369/1943/1980",
"http://www.annualreviews.org/doi/full/10.1146/annurev.marine.010908.163855?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed"
]
] | |
2litj3 | why are 3d printed gun such a big deal? | 3D printed guns have been all over the news in the last year or so, but I don't really get it. I understand that now anyone can print their own gun at home, but just molding a gun and its parts can't be a lot harder, right? Why is the 3D printed gun different, is it just that it's a LITTLE easier? Or am I missing somet... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2litj3/eli5_why_are_3d_printed_gun_such_a_big_deal/ | {
"a_id": [
"clv678n",
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"clv6ith",
"clvc222",
"clvcrin"
],
"score": [
13,
6,
3,
3,
2
],
"text": [
"Molding a gun and its parts takes a professional with lots of experience and knowledge, along with the expensive molds/etc. \n\nA 3D printer you can buy at s... | [] | [] | [
[],
[],
[],
[],
[]
] | |
4f3zle | how can we determine gender from handwriting? what makes some handwriting "girly"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4f3zle/eli5_how_can_we_determine_gender_from_handwriting/ | {
"a_id": [
"d25p0yr",
"d25p1sl"
],
"score": [
4,
2
],
"text": [
"Women develop fine motor skills earlier than men. When leaning to write they have already developed past a males, and at that point I'm guessing they develop habits (better or worse) and they take over later in life. ",
... | [] | [] | [
[],
[]
] | ||
5iq42u | why is it that western and mid-western states (nevada, colorado) have very clean borders (demarcations with almost straight lines) whereas eastern states (florida, n.carolina) have not so clean borders? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5iq42u/eli5_why_is_it_that_western_and_midwestern_states/ | {
"a_id": [
"dba3nb0"
],
"score": [
5
],
"text": [
"Eastern states were often settled first, and divided up later. Even where not, they tended to be divided along natural boundaries 0 the state goes to this river, for example. So the boundaries are as random as the natural border.\n\nIn the west, ... | [] | [] | [
[]
] | ||
4xc0lk | Why a spacecraft reentry has to be so violent? Why don't they make reentries at slower speeds to avoid all the heating up and stuff? | askscience | https://www.reddit.com/r/askscience/comments/4xc0lk/why_a_spacecraft_reentry_has_to_be_so_violent_why/ | {
"a_id": [
"d6eadv9",
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"d6ec1rf",
"d6egvjb",
"d6eop98"
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"score": [
29,
7,
32,
2,
2
],
"text": [
"You need at minimum about 7 times the mass of you payload in fuel to slow down from orbital velocity. That's discounting the mass of the tanks and engines y... | [] | [] | [
[],
[
"https://what-if.xkcd.com/58/"
],
[],
[],
[]
] | ||
d3tw4w | In mid-1863, Vicksburg fell, and the Confederacy was officially split by the Union controlled Mississippi. How did this change the levels of support, and perception of the effort, within the regions of the Trans-Mississippi still under Confederate control? | To be sure, I figure that Vicksburg falling was more symbolic than *literal* as it wouldn't be impossible to slip through, but I would expect that that symbolic loss, with the Union now able to patrol the entire river unmolested by shore batteries or enemy ships, would be a pretty devastating blow not just to morale ge... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/d3tw4w/in_mid1863_vicksburg_fell_and_the_confederacy_was/ | {
"a_id": [
"f05aghi"
],
"score": [
21
],
"text": [
"The Trans-Mississippi Confederacy was essentially an orphaned entity after the U.S. closed the Vicksburg/Port Hudson corridor in July 1863. People were pretty easily resigned to it, to be honest. The primary sources I've read all felt like they ... | [] | [] | [
[]
] | |
a1jmhz | What are the advantages/disadvantages for an organism to having a small or a large number of chromosome pairs? | askscience | https://www.reddit.com/r/askscience/comments/a1jmhz/what_are_the_advantagesdisadvantages_for_an/ | {
"a_id": [
"eaqqxtd"
],
"score": [
3
],
"text": [
"There are clear advantages to having more chromosome pairs:\n\n1. Gene redundancy: multiple copies of the same gene reside within the genome, so mutations in a single gene don’t necessarily lead to the complete disruption of protein synthesis sin... | [] | [] | [
[]
] | ||
7k0q1b | how are cabinet members chosen? | Is it up to the discretion of the president to do this or is there a longer process? If it is up to just the president, how is this allowable in terms of a constitutional government? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7k0q1b/elif_how_are_cabinet_members_chosen/ | {
"a_id": [
"dralx04"
],
"score": [
3
],
"text": [
"Per the law, the POTUS nominates the member and then that member is confirmed by the Senate. That is all that is actually legally required.\n\nIn practice, the POTUS will have a much longer vetting process run by various staffers or will dole ou... | [] | [] | [
[]
] | |
2bb8yb | Are astronauts on the ISS able to recognize constellations? How far away from the Earth's surface could you go before they become "skewed"? | askscience | http://www.reddit.com/r/askscience/comments/2bb8yb/are_astronauts_on_the_iss_able_to_recognize/ | {
"a_id": [
"cj3mhhf",
"cj3mzuw"
],
"score": [
56,
12
],
"text": [
"Orbiting the Earth makes no difference in what you see in the night sky. If you think about it, you'll realize that as the Earth orbits the Sun each year, it covers a much, much greater distance, and yet the constellation... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Extraterrestrial_skies#Extrasolar_planets",
"http://earthsky.org/space/night-sky-appearance",
"http://curious.astro.cornell.edu/question.php?number=713"
],
[]
] | ||
1pp9uo | If a person were spinning perfectly horizontally in space, could they slow themselves by putting their arms out? Much like an ice-skater? | If we take the question further, what if the person had a pack with heavy chains that they could fling outward. Would this slow their spin down at all? Co-worker just watched Gravity... | askscience | http://www.reddit.com/r/askscience/comments/1pp9uo/if_a_person_were_spinning_perfectly_horizontally/ | {
"a_id": [
"cd4mk8c",
"cd4n3bp",
"cd4pjmb",
"cd4q7cp"
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"score": [
11,
8,
2,
2
],
"text": [
"I haven't seen Gravity, but the essential idea you are referring to is conservation of angular momentum. The answer to your question is yes, you could slow down your rotational sp... | [] | [] | [
[],
[],
[],
[]
] | |
1z5mw3 | why is berkshire hathaway (brk-a) being traded at $171,000/share? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1z5mw3/eli5_why_is_berkshire_hathaway_brka_being_traded/ | {
"a_id": [
"cfqqhjs",
"cfqqsn6"
],
"score": [
5,
3
],
"text": [
"Because there aren't many shares for sale. That means that each is worth a bigger % of the value of the company.",
"They chose to never split the shares. "
]
} | [] | [] | [
[],
[]
] | ||
8vtmj8 | Has sexual activity changed with changes in personal hygiene - in particular was oral sex common when people bathed very rarely? | Edit: With the hygiene query this was prompted in part by remembering how Napoleon wrote to Joséphine telling her:
“Je reviens en trois jours; ne te laves pas!” (I will return in three days. Don’t wash!)
which is presumably referring to cunnilingus - so was guessing that, ahem, tastes had changed, and wondered what ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8vtmj8/has_sexual_activity_changed_with_changes_in/ | {
"a_id": [
"e1qizev",
"e1rrwyp"
],
"score": [
72,
3
],
"text": [
"There's an eighth to ninth century Old Irish penitential (a text that lets you know the penance for different sins) with explicit reference to oral sex:\n\n*Nech dogni etrath o belaib iiii anni in cet-fecht ma gnathach acna... | [] | [] | [
[
"https://www.jstor.org/stable/30007320?seq=1#page_scan_tab_contents"
],
[
"https://www.reddit.com/r/AskHistorians/comments/5dwk60/how_bad_would_it_have_smelled_in_a_medieval_city/da84g7z/",
"https://www.reddit.com/r/AskHistorians/comments/7xpbxp/what_was_hygiene_like_in_medieval_times/",
"http... | |
7fv07s | how does one alphabetize kanji? | English for example has 26 letters in defined order and words or names can be sorted easily this way, for example, making directory for business employee or phone book, or dictionary for words. But in Asian countries like Japan, their name aren't spelled in letters but in kanji and there can be several thousand differ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7fv07s/eli5_how_does_one_alphabetize_kanji/ | {
"a_id": [
"dqeirns",
"dqek1pn",
"dqeklmw",
"dqekzyt",
"dqen4jv"
],
"score": [
3,
5,
2,
16,
2
],
"text": [
"Korea has an alphabet song, just like English. \n\nTheir is an order is 가 나 다, etc. \n\nSo, names are ordered by their \"alphabet\" first symbol.",
"Ther... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Radical_38",
"https://en.wikipedia.org/wiki/Kangxi_radical#Unicode"
],
[]
] | |
15p4o3 | Is there anything like Sci-Fi literature dated before 1900/1800 ? | Thank you all for your answers, my curiosity has been satisfied. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/15p4o3/is_there_anything_like_scifi_literature_dated/ | {
"a_id": [
"c7oi8c4",
"c7oidbk",
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"c7opdz2",
"c7ovy6p"
],
"score": [
20,
4,
10,
5,
6,
4,
3,
2,
2
],
"text": [
"\"[True Story](_URL_0_)\" by Lucian dates to the 2nd century AD and ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/True_History"
],
[],
[
"http://en.wikipedia.org/wiki/Scientific_romance"
],
[
"http://en.wikipedia.org/wiki/Somnium"
],
[
"http://en.wikipedia.org/wiki/Definitions_of_science_fiction#In_chronological_order"
],
[
"http://www.reddit.com/r/AskHistor... | |
nsklm | the game of craps | I've always wanted to play (especially since I've been told that it has the best odds versus the house) but I just don't get it. The one time I played I was so nervous that I was going to mis-throw the dice that I didn't pay attention to how I lost.
Are 7's good or bad? How should I bet? How can I make my money last? A... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/nsklm/eli5_the_game_of_craps/ | {
"a_id": [
"c3bm1xx",
"c3brs1n",
"c3bm1xx",
"c3brs1n"
],
"score": [
9,
2,
9,
2
],
"text": [
"For some reason this question keeps coming up. [This seems to be the best answer.](_URL_0_)",
"1. Place bet \n2. Roll dice\n3. If you get a 7 or 11, you win\n4. If you get a 2,... | [] | [] | [
[
"http://www.reddit.com/r/explainlikeimfive/comments/j37z7/can_someone_explain_the_game_of_craps_li5/c28rf14"
],
[],
[
"http://www.reddit.com/r/explainlikeimfive/comments/j37z7/can_someone_explain_the_game_of_craps_li5/c28rf14"
],
[]
] | |
v7fbg | Has the total number of organisms on earth at a given time increased, decreased, or remained generally static over the last 500 or so years (more recent history) | askscience | http://www.reddit.com/r/askscience/comments/v7fbg/has_the_total_number_of_organisms_on_earth_at_a/ | {
"a_id": [
"c5208xn",
"c521h3t",
"c522puv",
"c522wc0",
"c5239f1"
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"score": [
33,
12,
4,
2,
2
],
"text": [
"Are you including prokaryotes (i.e. bacteria and archaea)? If so, the number is so large as to be more or less incomprehensible.\n\nThere are something like... | [] | [] | [
[],
[],
[],
[
"http://en.wikipedia.org/wiki/Timeline_of_extinctions"
],
[]
] | ||
1wbdex | why water flows ? | the question really is about why does a liquid substance flow like it does... taking the shape of what comes on it's way... always going down if it can..
I know it sounds like a stupid question, but there is no stupid question when you are five.. and actually, it's my friend's daughter who is just five who came with t... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1wbdex/eli5why_water_flows/ | {
"a_id": [
"cf0duzv"
],
"score": [
6
],
"text": [
"Basically the force holding a liquid's molecules together is weaker than other forces that its experiencing. The most significant one usually being gravity. Gravity pulling down on the molecules in the liquid overcomes any sort of connection betw... | [] | [] | [
[]
] | |
390e26 | why are some things prioritized in media and other things aren't? | For example the school shootings in Pakistan vs Almost the same event in an African country I can't remember the name of (due to almost no news reports). The only reason I heard about the killings in this country was because of people complaining about there being no news reports on it even though the death-count was r... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/390e26/eli5_why_are_some_things_prioritized_in_media_and/ | {
"a_id": [
"crzai0h",
"crzbvoh"
],
"score": [
3,
2
],
"text": [
"When it comes to international news in North America, there are two sources primarily used by news companies. The Associated Press in the USA and The Canadian Press in Canada. Once a story is found at a media organization it... | [] | [] | [
[],
[]
] | |
2c89vq | Why can light rays never approach one another in the event horizon of a black hole? | I know that in the event horizon of a black hole light rays can only run parallel to each other or away from each other, because if they would meet they would fall into the black hole and therefor never have been in the boundary of the black hole...but I don't know why these light rays cannot just continue and stay in ... | askscience | http://www.reddit.com/r/askscience/comments/2c89vq/why_can_light_rays_never_approach_one_another_in/ | {
"a_id": [
"cjcza90"
],
"score": [
6
],
"text": [
"The definition of \"parallel\" changes because space-time itself changes in the presence of mass. Leave aside the mysteries of black holes for a moment. Suppose I send two space ships out to some distance away from the sun. Say they're 100 000 mi... | [] | [] | [
[]
] | |
4hmioi | State of Britain after Rome but before the Anglo-Saxons | I've recently developed an interest in early British history and there's one question that's recently struck me.
Correct me if I'm wrong but the last roman legions were ordered to leave Britain in the early fifth century to defend the empire elsewhere and by the end of the century the first Anglo-Saxon kingdoms were ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4hmioi/state_of_britain_after_rome_but_before_the/ | {
"a_id": [
"d2qwt98",
"d2ra52z"
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"score": [
42,
3
],
"text": [
"OK this is a very broad question, as it arguably covers about 100-250 years of history across a very diverse area with virtually no primary sources that can be considered trustworthy. For example, 2 sources which early hist... | [] | [] | [
[],
[
"https://www.thebritishhistorypodcast.com/"
]
] | |
14v20k | How healthy is dog food? | I'm curious to know the research about what is best for a dog's diet, and if brain health for dogs is as important as it is for humans in terms of health and longevity.
Do dogs need essentially the same nutrients/nutrient balance that humans do to live healthiest? What is the optimal mix? | askscience | http://www.reddit.com/r/askscience/comments/14v20k/how_healthy_is_dog_food/ | {
"a_id": [
"c7gp4u0",
"c7gsj3i",
"c7gt2ue",
"c7gwe2i"
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"score": [
99,
7,
15,
9
],
"text": [
"This is a difficult question to answer. There are plenty of dogs that make it well into old age with something like \"Old Roy,\" and other dogs that have died young despite havin... | [] | [] | [
[
"http://www.nap.edu/catalog.php?record_id=10668"
],
[],
[],
[
"http://www.merckvetmanual.com/mvm/htm/bc/tmgn46.htm"
]
] | |
mzoio | what stops people sitting in the emergency exit seats on a plane from pulling the window and killing everyone? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/mzoio/eli5_what_stops_people_sitting_in_the_emergency/ | {
"a_id": [
"c3551uc",
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"score": [
24,
24
],
"text": [
"OK, nobody has explained it yet. \n\nFirst of all, the door is 20-30kgs heavy, and you have to pull it out then turn it and toss it through in an emergency. In the air, the pressure is really high inside the plane, and low... | [] | [] | [
[],
[]
] | ||
6tonty | how are deafblind people taught to communicate? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6tonty/eli5_how_are_deafblind_people_taught_to/ | {
"a_id": [
"dlmas1g",
"dlmo59v",
"dlmo9yd",
"dlmuucm",
"dlmwo8t",
"dlmzpbz",
"dlmzsin",
"dln28sq",
"dln3rik",
"dln4g22",
"dln51bl",
"dln6v99"
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"score": [
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"text": [
... | [] | [] | [
[],
[],
[],
[],
[],
[],
[
"https://en.m.wikipedia.org/wiki/Land_of_Silence_and_Darkness",
"https://youtu.be/bKjokn2tdfU"
],
[],
[],
[],
[],
[
"http://m.imdb.com/title/tt0375611/"
]
] | ||
2wwv9f | what's the difference between vapor and smoke? | I use electronic cigarettes, and the "vapor" they produce looks and behaves exactly like smoke.
But it isn't smoke.
I can't explain it to people who ask me about this "smoke". Sometimes I say that it's like a mini kettle, boiling the cigarette liquid and producing steam - but it isn't a steam so I don't like using t... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2wwv9f/eli5_whats_the_difference_between_vapor_and_smoke/ | {
"a_id": [
"couu4od",
"couu4uy",
"couuhpf"
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"score": [
2,
3,
2
],
"text": [
"Have you ever been to a concert or another place that had a fog machine? That fog is created by heating and vaporizing a mixture of water and a non-toxic chemical. Nothing is burned with fire to make ... | [] | [] | [
[],
[],
[]
] | |
2qw215 | Why does the sun appear yellow but stars at night appear white? And does the redshift in a stars light due to distance affect the color we see with the naked eye? | askscience | http://www.reddit.com/r/askscience/comments/2qw215/why_does_the_sun_appear_yellow_but_stars_at_night/ | {
"a_id": [
"cnae69m"
],
"score": [
6
],
"text": [
"The Sun appears yellow from the Earth's surface mostly because the atmosphere scatters blue light. A bright G-type star like Capella also appears yellowish. Most stars, except some of the brightest ones, appear white because [the photoreceptor ce... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Photoreceptor_cell#Difference_between_rods_and_cones"
]
] | ||
38nx5r | why are republicans and obama both in support of obamatrade? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/38nx5r/eli5_why_are_republicans_and_obama_both_in/ | {
"a_id": [
"crweo8a"
],
"score": [
2
],
"text": [
"Because it serves American economic interests. Not the American people, necessarily, but corporations definitely. We want to maintain global economic superiority and giving our megacorps more help with this legislation does that. These trade agre... | [] | [] | [
[]
] | ||
8ywen8 | How does one "shoot" alpha particles at something? | I was in chem the other day and we were talking about rutherford's famous experiment and how he shot alpha particles at gold foil. I know what alpha particles are but . . . how do you shoot them? | askscience | https://www.reddit.com/r/askscience/comments/8ywen8/how_does_one_shoot_alpha_particles_at_something/ | {
"a_id": [
"e2e9px2",
"e2f0l8n"
],
"score": [
34,
2
],
"text": [
"In Rutherford's days (and for simple tabletop experiments today), you just take an alpha source (a material that naturally decays by alpha emission), and collimate it. That means that you surround it with shielding except f... | [] | [] | [
[],
[]
] | |
6w0qw5 | why tattoos do not initiate immune system response? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6w0qw5/eli5_why_tattoos_do_not_initiate_immune_system/ | {
"a_id": [
"dm4fzse",
"dm4g3bc",
"dm4gbjr"
],
"score": [
6,
10,
3
],
"text": [
"They do (no super cereal though), that's why they fade over time. It's your body \"eating\" the ink and disposing of it. You literally poo out your tattoo.",
"They do. The needle penetrating the sk... | [] | [] | [
[],
[],
[]
] | ||
23fg72 | Does Post-Modernism make the study of History futile? and if not why not? | Maybe I am being naive or overly nihilistic but my study of Post-Modernism especially in relation to history has left we with a sense of hopelessness when looking at History. If we can never truly know the past (an admittedly simplified version of a Post-Modern position) whats use is History beyond being a good story? ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/23fg72/does_postmodernism_make_the_study_of_history/ | {
"a_id": [
"cgwherr",
"cgwj4nj",
"cgwlty0",
"cgx4scw"
],
"score": [
35,
4,
59,
2
],
"text": [
"I'm a big fan of postmodernism. It's all very interesting. The thing you have to watch out for, though, is that you don't fall down the rabbit hole. It's easy to get a sense of h... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/200ru9/why_do_we_study_history_i_am_at_a_loss/"
],
[],
[
"http://clioscurrent.com/blog/2014/4/24/2cwscwvtpzrwflzmxq2e3job7r0unr"
],
[]
] | |
7vgrdj | before computer databases, how did states keep track of which license plates they already issued? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7vgrdj/eli5_before_computer_databases_how_did_states/ | {
"a_id": [
"dts4now",
"dts4sqp"
],
"score": [
2,
2
],
"text": [
"Well, they used old fashioned paper databases. That's how the world worked before computers were introduced. ",
" > Remember, I’m 5 and don’t know how paper files work.\n\nBut you know what a computer database does???\n... | [] | [] | [
[],
[]
] | |
3cxf5m | what does bernie sanders stand for and why should i vote for him. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3cxf5m/eli5_what_does_bernie_sanders_stand_for_and_why/ | {
"a_id": [
"csztvxe",
"cszu0i2"
],
"score": [
6,
13
],
"text": [
"You should take a look at [ISideWith](_URL_0_), as it will answer your question much easier and more completely than most of us might be able to.\n\nIt's a simple quiz that(make sure you click the \"Show X More\" options in... | [] | [] | [
[
"http://www.isidewith.com/elections/2016-presidential-quiz"
],
[]
] | ||
8dvpq7 | How does sunscreen stop you from getting burnt? | Is there something in sunscreen that stops your skin from burning? How is it different from other creams etc? | askscience | https://www.reddit.com/r/askscience/comments/8dvpq7/how_does_sunscreen_stop_you_from_getting_burnt/ | {
"a_id": [
"dxqcs7d",
"dxqe1wl",
"dxqenqd",
"dxqfmnw",
"dxqjpwb",
"dxqp9eq",
"dxqrkqm",
"dxr6ser",
"dxrn8ew"
],
"score": [
4014,
73,
432,
165,
14,
2,
8,
2,
2
],
"text": [
"Yeah it contains one or more ingredients that absorb or refle... | [] | [] | [
[],
[],
[],
[
"https://www.scientificamerican.com/article/what-happens-when-you-get/"
],
[],
[],
[],
[],
[
"https://1.bp.blogspot.com/-3UQncBh44Zs/ULEsJj_wjlI/AAAAAAAAEoU/FEBu6v0czp4/s1600/Picture4.png"
]
] | |
22g474 | why do websites bother having the age date range from the 1800s to present day? | Because a newborn baby wouldn't be registering plus it's really unlikely that the oldest people in the world would be either. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22g474/eli5_why_do_websites_bother_having_the_age_date/ | {
"a_id": [
"cgmgjfy",
"cgmi9j7"
],
"score": [
7,
14
],
"text": [
"Because its not very hard (like literally a few button presses) to expand the range. By covering the entire length of options they can't possibly miss anyone. Much easier than having someone complain saying \"I was born i... | [] | [] | [
[],
[]
] |
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