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 |
|---|---|---|---|---|---|---|---|---|---|
1iyb1z | How was construction in ancient cities prioritized? | I'm mostly interested in ancient Rome, but any insight into ancient infrastructure would be wonderful. When a new city was built, what was the general order in which people built things? In walled cities, were walls among the first things built? Did people settle in cities that were still "under construction?" Was cons... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1iyb1z/how_was_construction_in_ancient_cities_prioritized/ | {
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"text": [
"Dur Sharrukin was a brand new capital city built by Sargon II from 716 BC to 706 BC. The outer walls measured 1.76 km x 1.635 km, had 157 towers and seven gates. There was a large barracks, built in the s... | [] | [] | [
[]
] | |
2xxynm | why do most unknown calls i receive on my home phone end up having no one on the other end? | Why would they waste their time calling? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xxynm/eli5_why_do_most_unknown_calls_i_receive_on_my/ | {
"a_id": [
"cp4eoat"
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"score": [
2
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"text": [
"They're usually from call centres where they have a machine automatically call numbers on a pre-assigned list. Then, when a voice is detected on your end, someone is connected on their end to talk to you. It saves them time, even if it does resul... | [] | [] | [
[]
] | |
1fl30u | Why is Zeta(0) equal to -1/2? | I am very confused.
So zeta(s) is equal to 1/(1^ s)+1/(2^ s)+1/(3^ s)+..., so if s=0 then we have 1/(1^ 0)+1/(2^ 0)+1/(3^ 0)+...=1+1+1+...= ∞, so zeta(0) should be ∞. Why is it -1/2? | askscience | http://www.reddit.com/r/askscience/comments/1fl30u/why_is_zeta0_equal_to_12/ | {
"a_id": [
"cabb7ao"
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"text": [
"This is because the zeta function is not defined to be equal to that sum on the entire complex plane; it is only given by the sum you're looking at when Re(s) > 1. The Riemann Zeta function is actually defined to be the analytic continuation o... | [] | [] | [
[
"http://en.wikipedia.org/wiki/1_%2B_1_%2B_1_%2B_1_%2B_%E2%8B%AF"
]
] | |
28ij4p | Why does the metal from meteorites have such a distinctive zig-zag pattern? | Like this: _URL_0_
or this: _URL_1_ | askscience | http://www.reddit.com/r/askscience/comments/28ij4p/why_does_the_metal_from_meteorites_have_such_a/ | {
"a_id": [
"cibc9n3"
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"score": [
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"text": [
"That pattern, called a [Widmanstatten pattern](_URL_1_) is due to the crystallization of iron and nickel minerals in the meteorite cooling very slowly. Here, 'very slowly' means a few hundred or thousand degrees C every *million years*. This s... | [] | [
"http://i.imgur.com/fDKeWK7.jpg",
"http://i.imgur.com/VZdMFRB.jpg"
] | [
[
"http://www.higp.hawaii.edu/~escott/Goldstein%20ea%20chem%20review.pdf",
"http://en.wikipedia.org/wiki/Widmanst%C3%A4tten_pattern#cite_note-8"
]
] | |
1m4hkw | How does parasitism between a host and a parasite of different domains work? | How can a wasp, an animal, trigger genetic changes in an oak, a plant, to form galls?
This might be a senseless question but I cannot wrap my head aroud a concept that organisms so different like an animal and a plant, or a fungus and an animal etc, are able to tinker with the genetic code af an almost completely ali... | askscience | http://www.reddit.com/r/askscience/comments/1m4hkw/how_does_parasitism_between_a_host_and_a_parasite/ | {
"a_id": [
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"text": [
"They aren't really tinkering with the code so much as producing an enviornment that induces the host to do something. It's more like instigating a pearl to form using a bead than genetic engineering (... | [] | [] | [
[],
[],
[]
] | |
pmz1a | We all used to eats boogers: what effect could/did that have? | We all used to eat them... did that have a positive effect or a negative one? Also, what, specifically, are boogers made of that made them appealing? | askscience | http://www.reddit.com/r/askscience/comments/pmz1a/we_all_used_to_eats_boogers_what_effect_coulddid/ | {
"a_id": [
"c3qn99v",
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"score": [
5,
4
],
"text": [
"Unfortunately I can't find the study, but a while ago (2-3 years ago) I ran across an article suggesting that eating boogers was a pseudo-vaccination, killing whatever got caught and allowing the inert form to be ingested to... | [] | [] | [
[],
[]
] | |
4hjgas | when you jump into a cold lake (say 60°f or ~15°c) why does the water no longer feel cold after about 5 minutes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4hjgas/eli5_when_you_jump_into_a_cold_lake_say_60f_or/ | {
"a_id": [
"d2q1wlq"
],
"score": [
4
],
"text": [
"Your body has mechanisms in place to warm you up should you be in a cold environment. Dilated blood vessels provide a flush of warmth, and shivering also produces warmth. By doing this, your body can increase its internal temperature and keep you... | [] | [] | [
[]
] | ||
4px5ja | what's the difference between nuclear and thermonuclear? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4px5ja/eli5_whats_the_difference_between_nuclear_and/ | {
"a_id": [
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3
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"text": [
"Usuaully Nuclear weapons are basic uranium or plutonium based 1 stage nuclear bombs that function by triggering a single fission reaction which causes a highly radioactive material to \"break\" apart and release large ammou... | [] | [] | [
[],
[]
] | ||
1p7cxq | Do electric motors in cars have a limited lifespan? | The reason I'm asking is that in the near future (3/4/5+ years from now), we're going to be seeing used electric cars on the market like Teslas, Volts, etc at more reasonable price points.
Normally when we shop for internal combustion cars, drivetrain wear and engine mileage are big factors in our purchasing decisions... | askscience | http://www.reddit.com/r/askscience/comments/1p7cxq/do_electric_motors_in_cars_have_a_limited_lifespan/ | {
"a_id": [
"cd09uij",
"cd0ne0p",
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"score": [
3,
2,
3
],
"text": [
"Not forever. Ac motors have bearings which will need periodic replacement, windings with relatively delicate insulation over many turns of thin wire, and a metal cage with a rotor. Stick all this in a b... | [] | [] | [
[],
[],
[]
] | |
27stld | Were white British (and Dominion) troops' relationships with non-white troops from the colonies generally positive? | I've read a bit recently about how American segregation of troops stationed in the UK was kind of shocking and offensive to many British soldiers and civilians. I'm interested in how they got along with military personnel recruited from the empire. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/27stld/were_white_british_and_dominion_troops/ | {
"a_id": [
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8
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"text": [
"I've read a decent amount lately about how the UK/Dominion troops and populations didn't take too well to the American forces' practice of segregation.\n\nI am curious as to how this was reconciled with the fact that the UK ... | [] | [] | [
[],
[
"http://www.caribbeanaircrew-ww2.com/",
"http://www.kingsafricanriflesassociation.co.uk/the-history-of-the-kar/",
"https://en.wikipedia.org/wiki/Ulric_Cross"
]
] | |
6en6ta | the science of coffee | I love coffee but it kind of baffles me how just hot water and some ground up beans creates such a drink. What chemical process makes the drink from this? Why is it bad for my teeth if it's just hot water? Why do the grounds taste nothing like a good cup?
Thank you! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6en6ta/eli5_the_science_of_coffee/ | {
"a_id": [
"dibiuhs",
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"score": [
8,
6
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"text": [
"Coffee is a solution - in the same way that mixing salt with water gives you salt water, coffee is bits of coffee mixed in with water.\n\nWhen you grind a coffee bean, there are some parts of the bean that can dissolve in ho... | [] | [] | [
[],
[]
] | |
28llls | Does anyone have examples of national anthems that were later abolished/replaced? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/28llls/does_anyone_have_examples_of_national_anthems/ | {
"a_id": [
"cic5lht"
],
"score": [
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"text": [
"I believe the German National Anthem was during the Nazi era. \n\nThe Soviet anthem had the words replaced, but kept the rather stirring melody.\n\nS. Africa replaced \"Die Stem van Suid-Afrika\", but kept a verse of it in the new anthem.\n\nCana... | [] | [] | [
[]
] | ||
6ohm3e | During the Waco standoff in 1993, why did large segments of the American population rally around the leader of a doomsday cult who was sexually abusing young girls, rather than their own government? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6ohm3e/during_the_waco_standoff_in_1993_why_did_large/ | {
"a_id": [
"dkhof7t",
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"text": [
"You said during, so I'll try to keep the focus as contemporary as possible to the siege. Nevertheless, I only found one opinion poll taken from before the lethal ending to the Waco Siege and that only polled Waco residen... | [] | [] | [
[
"http://www.cbsnews.com/news/poll-govt-covered-up-waco/",
"http://www.stateofformation.org/2012/06/“not-the-jesus-i-love-waco-residents-perception-of-the-branch-davidian-conflict-by-janet-jensen",
"http://www.islandone.org/Politics/Waco.McCurry.html",
"http://www.nytimes.com/1993/04/22/us/death-in... | ||
1upe0s | How did calibers in uneven numbers come about? Like 152mm, 37mm and 76mm? | Wouldnt it be easier to just use even numbers like 150, 40 and 75mm? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1upe0s/how_did_calibers_in_uneven_numbers_come_about/ | {
"a_id": [
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"text": [
"The general reason for these odd numbers is that they are conversions from before the metric system. 37mm is about 1.5 inches, 76mm is about 3 inches, 88mm is about 3.5 inches, 152mm is about 6 inches. Early tank and anti-... | [] | [] | [
[
"http://en.wikipedia.org/wiki/3-inch_Gun_M1918"
],
[]
] | |
4if0lg | if the majority of people are right handed, why does the fork go on the left when setting a table? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4if0lg/eli5_if_the_majority_of_people_are_right_handed/ | {
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"score": [
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"text": [
"What are the origins of that being the case?",
"The knife requires more dexterity compares to the fork which ... | [] | [] | [
[],
[],
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[],
[],
[
"https://www.reddit.com/r/explainlikeimfive/search?q=fork+left&restrict_sr=on&sort=relevance&t=all"
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4l4wn6 | why do some people leak pee when they sneeze? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4l4wn6/eli5_why_do_some_people_leak_pee_when_they_sneeze/ | {
"a_id": [
"d3kas9c"
],
"score": [
3
],
"text": [
"The release of your bladder is controlled by muscles. Those muscles can, for a variety of reasons, be weakened. If those muscles are weak, a sudden jolt like a sneeze can dislodge them for a moment, releasing a small amount of pee."
]
} | [] | [] | [
[]
] | ||
1c1ug0 | I'd want to understand how and why Scandinavia became Christianized. | It seems that Norse mythology and practices are more of a fit for the living conditions in Scandinavia at the time of conversion. Generalizing for the sake of brevity, but it seems like the Old Gods were all about strength, cunning, tenacity, fatalism, and therefore perfectly suited to the hard, dangerous, and cruel co... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1c1ug0/id_want_to_understand_how_and_why_scandinavia/ | {
"a_id": [
"c9cmvgd",
"c9jxfwo"
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"score": [
2,
2
],
"text": [
"I'll yield to better historians, but my understanding was that it had more to do with trade and politics than natural spiritual inclinations. By the time it happened, Scandinavia had been increasingly in contact with Christi... | [] | [] | [
[],
[]
] | |
93r4g2 | I discovered this seemingly well-researched video on Christopher Columbus, and why he wasn't as bad as everyone thinks he was. How accurate is it? | _URL_0_
He makes many bold claims and contradicts to many statements I have been told numerous times. His sources seem solid, though, but I'm no historian. What do you all think? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/93r4g2/i_discovered_this_seemingly_wellresearched_video/ | {
"a_id": [
"e3fedqk"
],
"score": [
38
],
"text": [
"I suspect everyone who watches this will see different things. I'll defer to experts on Columbus regarding the content in the first 2/3 but can point to some red flags in the last third related to how he talks about the people indigenous to Nort... | [] | [
"https://youtu.be/ZEw8c6TmzGg"
] | [
[
"http://americanhistory.oxfordre.com/view/10.1093/acrefore/9780199329175.001.0001/acrefore-9780199329175-e-3",
"http://articles.latimes.com/1992-10-12/news/mn-160_1_columbus-day-parade",
"http://www.un.org/en/events/indigenousday/"
]
] | |
ehqnmn | topology/topological manifold | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ehqnmn/eli5_topologytopological_manifold/ | {
"a_id": [
"fcl4ayu"
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"text": [
"Topology: the study of the geometric properties of a space/surface and which properties are affected by changing that shape/space through a continuous deformation (i.e. no rips/tears and no gluing); or the rules governing a specific topological s... | [] | [] | [
[]
] | ||
3sus9d | When did the concept of "refugees" arise? It seems that in the past if your country was at war and you were a male of fighting age you would stay. When did men start leaving their country's conflicts? Is this a modern concept or are there examples of this happening throughout history? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3sus9d/when_did_the_concept_of_refugees_arise_it_seems/ | {
"a_id": [
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"text": [
"This depends on your definition of 'refugees'.\n\nIn 1951, a convention was held in Geneva to give an official definition to the term, and from henceforth it was possible to declare whether a person was a refugee or not. [s... | [] | [] | [
[
"http://www.unhcr.org/pages/49da0e466.html"
],
[]
] | ||
2umaj6 | In the US Civil War, how realistic is the idea that if the south had won a decisive military victory like capturing Washington, Britain and France could have been tempted to intervene on the side of the south, possibly causing a peace settlement? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2umaj6/in_the_us_civil_war_how_realistic_is_the_idea/ | {
"a_id": [
"co9p7xv"
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"score": [
4
],
"text": [
"Well, the idea that the Confederacy could ever have successfully captured Washington by storm or siege is utterly unrealistic. By 1862 Washington was likely one of the most heavily defended cities in the world, by 1864 it was the most heavily for... | [] | [] | [
[]
] | ||
jubj4 | Violations of the equivalence principle? | _URL_1_
_URL_0_
Is this credible? What does it mean if the equivalence principle really is violated? Does it mean something to unification like the Ars Technica article claims? Why does the spam filter not like me? | askscience | http://www.reddit.com/r/askscience/comments/jubj4/violations_of_the_equivalence_principle/ | {
"a_id": [
"c2f61bb",
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"score": [
3,
12,
3,
3,
12,
3
],
"text": [
"Spammy is a grumpy old man who has a taste for good submissions. He eats them up. ",
" > Is this credible?\n\nYes, quite. It's a ... | [] | [
"http://prl.aps.org/abstract/PRL/v107/i8/e081102",
"http://arstechnica.com/science/news/2011/08/violating-relativity-by-breaking-equivalence.ars"
] | [
[],
[],
[],
[],
[],
[]
] | |
3osfy2 | how come most 3d games render at 60 fps while it takes a few seconds to render a textureless cube in blender? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3osfy2/eli5_how_come_most_3d_games_render_at_60_fps/ | {
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36,
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"text": [
"The answer depends on what you're doing in Blender. Most likely, it's because you are using a different kind of rendering. When rendering a scene, there are a bunch of computation... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Rasterisation",
"https://en.wikipedia.org/wiki/Ray_tracing_%28graphics%29#/media/File:Recursive_raytrace_of_a_sphere.png",
"http://mft-dev.dk/wp-content/uploads/2014/05/icosahedron_frame_sub3.gif",
"https://en.wikipedia.org/wiki/Ray_tracing_%28graphics%29"
],... | ||
6ajfcq | how do lithium ion batteries work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6ajfcq/eli5how_do_lithium_ion_batteries_work/ | {
"a_id": [
"dhf0h2w"
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"score": [
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],
"text": [
"A lithium ion battery uses charged lithium particles (ions) to move electricity from one end of the battery to another. As energy leaves the battery, these lithium ions move from the negative side of the battery to the positive side, forming a co... | [] | [] | [
[]
] | ||
22hkqx | i turned on my old guitar amp with nothing plugged in and it started playing a radio station. how is this happening? | It's an old Crate guitar amplifier. Could it be a loose wire somehow acting as an antenna? Any ideas? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22hkqx/eli5_i_turned_on_my_old_guitar_amp_with_nothing/ | {
"a_id": [
"cgmw5pm",
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"cgmzmvm"
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2,
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2,
2
],
"text": [
"Radio waves are stupid easy to pick up on any basic consumer amplifier. I've picked up radio stations on PC speakers before. Somewhere along the lines, the ra... | [] | [] | [
[],
[],
[],
[],
[]
] | |
d1eos8 | what happens with the intellectual properties of a company when they close down? | Let's say The Walt Disney Company somehow went bankrupt and closed down and all movies, plushies and toys stop being made.
& nbsp;
What happens with the things that already exist? Will the ideas enter the public domain or will they be given to someone? Could they be used and distributed freely? If not, who will mana... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d1eos8/eli5_what_happens_with_the_intellectual/ | {
"a_id": [
"ezkvj4m",
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"score": [
2,
2
],
"text": [
"It gets sold off/liquidated, like physical assets (to take your example further, Disneylands, corporate headquarters, and other things like that).",
"Rights, like intellectual property rights, only really matter if there... | [] | [] | [
[],
[]
] | |
51crhp | why do you see so many saabs and other out of production cars in movies? | Maybe it's because I've owned one before but, I just see an inordinate amount of Saabs, Pontiacs, and Saturns in movies. Is this a cost cutting thing or is there something else behind it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/51crhp/eli5_why_do_you_see_so_many_saabs_and_other_out/ | {
"a_id": [
"d7ayzpd"
],
"score": [
3
],
"text": [
"Those brands are/were all owned by GM, and GM has made it a point of pride that their vehicles have been showcased in many motion pictures. What you're seeing is product placement coupled with favorable rental rates for fleet vehicles to achieve ... | [] | [] | [
[]
] | |
ahsaz5 | how does a bike stay up when at faster speeds but will fall over when not going fast enough? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ahsaz5/eli5_how_does_a_bike_stay_up_when_at_faster/ | {
"a_id": [
"eehji46",
"eehjy74"
],
"score": [
2,
2
],
"text": [
"The gyroscopic forces created by the wheels mass cause the wheel to fix itself on a plane in turn overcoming to forces of gravity stopping it just falling over",
"Generally bikes have handlebars which have a centre of ma... | [] | [] | [
[],
[]
] | ||
698zak | what is infrasound and how can it cause panic attacks in humans? | I'm reading about the Dylatov Pass Incident and the theory of infrasound is interesting to me but I don't understand what it is. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/698zak/eli5_what_is_infrasound_and_how_can_it_cause/ | {
"a_id": [
"dh4w2qk"
],
"score": [
2
],
"text": [
"Human hearing works for tones in the frequency range of 20hz-20000hz. Everything below that is called infrasound, everything above is called ultrasound. \n\nThe resonant frequencies of a lot of human organs happen to be in the infrasound range, s... | [] | [] | [
[]
] | |
dxl1yc | what would happen to a person when they cannot afford payment to a loan/debt. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dxl1yc/eli5_what_would_happen_to_a_person_when_they/ | {
"a_id": [
"f7rstwq",
"f7rtv4c",
"f7ru1n8"
],
"score": [
3,
2,
5
],
"text": [
"In the US, they may be able to file for bankruptcy protection, discharging the debt if the person has no way of paying the debt (except for selling off essential assets).",
"This varies widely by wh... | [] | [] | [
[],
[],
[]
] | ||
60r3vt | how can a tiny amount of toxic chemical affect a person's entire body? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/60r3vt/eli5_how_can_a_tiny_amount_of_toxic_chemical/ | {
"a_id": [
"df8lzod",
"df8s0ck"
],
"score": [
2,
3
],
"text": [
"Toxicity is determined by the dose and the rout of administration. Some substances are highly toxic in small quantities (like ricin and cyanide) while others take large quantities to have negative physiological effects (like... | [] | [] | [
[],
[]
] | |
fhbspc | why the rear wheel in buses and trucks is close to centre? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fhbspc/eli5_why_the_rear_wheel_in_buses_and_trucks_is/ | {
"a_id": [
"fka6wjq",
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"score": [
8,
2
],
"text": [
"It's to increase manouverability. The further back the rear wheels are, the longer the wheelbase of the vehicle is, and therefore the wider any turns it will make will be. \n\nIf you move the rear wheels towards the front of... | [] | [] | [
[],
[]
] | |
1uqhjs | how do first responders or hospital personnel know who to contact if you have had an accident and are unconscious? | For example, say you've been in a car accident and are rushed to the hospital. What methods are used to find your emergency contact? Obviously your driver's license would be a start, but what about having an ICE number programmed into your phone? Does anyone ever look for that? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1uqhjs/eli5_how_do_first_responders_or_hospital/ | {
"a_id": [
"ceko817",
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"text": [
"I believe this generally sorted out only after you get to the hospital.",
"Well, in my case when I was involved in a battery and knocked unconscious; someone found my phone and... | [] | [] | [
[],
[],
[],
[]
] | |
49vlan | what ever happened to the sequestration? | So I remember sequestration happening but there was never really the fallout everyone was talking about. So I googled and looked for some news articles and just never found one that sufficiently answered my question. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/49vlan/eli5_what_ever_happened_to_the_sequestration/ | {
"a_id": [
"d0v89ab",
"d0vbh9l"
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"score": [
2,
2
],
"text": [
"The simple answer is it happened and almost nothing has come of it. The people that said the sky would fall were wrong, and the people who said it would fix our deficit were wrong. That's it.\n\nSequestration is the exact pr... | [] | [] | [
[],
[]
] | |
zaf6x | What effect does machine generated wind (i.e. a fan) have on sound waves? | When my fan is facing into my apartment and wind is being blown in to keep it cool, does it have an effect on the sound waves coming from my speakers? With the fan turned off, would more of the sound waves reach the outside (and further annoy my neighbors)? | askscience | http://www.reddit.com/r/askscience/comments/zaf6x/what_effect_does_machine_generated_wind_ie_a_fan/ | {
"a_id": [
"c62zcos",
"c633722"
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"score": [
3,
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"text": [
"Sound travels at a speed relative to the medium it's in (the air). For example, in the cockpit of a fighter jet, no matter how fast you're going, sound will always travel away from you when you speak at about 340m/s (dependi... | [] | [] | [
[],
[]
] | |
64dj5x | why does 101 mean the basics of something rather than just 1 or 001? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/64dj5x/eli5_why_does_101_mean_the_basics_of_something/ | {
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"dg19xk5",
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"score": [
21,
252,
21,
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],
"text": [
"It's based on a standard for how college classes are numbered. All the first-level classes are 1XX, second level are 2XX, etc. \nBased on that model, the basic beginner class... | [] | [] | [
[],
[],
[],
[]
] | ||
5d217t | I've read that in the 1800's, US military officers were drawn from the upper class. If so, was it possible that a lower class citizen could perform well in school, go to college and be commissioned regardless of his prior social status? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5d217t/ive_read_that_in_the_1800s_us_military_officers/ | {
"a_id": [
"da1auqv",
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"score": [
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3
],
"text": [
"Yes, it was possible. The prototypical example would be Andrew Jackson, the son of recent Irish immigrants (his older siblings were actually born in Ireland - that's how recent his parents had immigrated before his birth). J... | [] | [] | [
[],
[]
] | ||
3106yu | Did the discovery of the Higgs particle actually prove or disprove either Super-symmetry or the Multiverse theories? | Watching Particle Fever, there was all this excitement that the Higgs would decide between one or the other; and conveyed a very different picture of the universe between the two; but seemed to indicate the results were inconclusive? | askscience | http://www.reddit.com/r/askscience/comments/3106yu/did_the_discovery_of_the_higgs_particle_actually/ | {
"a_id": [
"cpxja46"
],
"score": [
5
],
"text": [
"Nope. It confirmed a prediction of the [Standard Model of Particle Physics](_URL_0_).\n\nThe Standard Model doesn't say anything about supersymmetry (often abbreviated to SuSy) or the multiverse.\n\nSuSy is a hypothetical extension to the Standar... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Standard_Model"
]
] | |
2iszqc | why are arabs and people from north africa (egypt, libya, morocco, tunisia, etc.) labeled as "white" or "caucasian" in the us census? | I did some research before posting but I couldn't find a legitimate answer so I come to Reddit in hopes that someone can shed some light on the matter.
I am Egyptian and on my papers it says I am white. Whenever I fill out anything is official I label myself as white. I even had an instance when I was younger where I ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2iszqc/eli5_why_are_arabs_and_people_from_north_africa/ | {
"a_id": [
"cl56uou",
"cl59ycp"
],
"score": [
8,
3
],
"text": [
"Race is a construct. There was a time when Russians, Irish and Italians weren't considered white themselves. ",
"Though race is a social construct, and colloquial speech generally equates \"Caucasian\" with \"white\", Ca... | [] | [] | [
[],
[]
] | |
2ilran | why do older tvs have a weird screen effect while being viewed on another camera? | The kind of effect you can see when you're family is recording you as a child while you're smacking the TV in the 90's. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ilran/eli5_why_do_older_tvs_have_a_weird_screen_effect/ | {
"a_id": [
"cl3952e"
],
"score": [
6
],
"text": [
"because the refresh rate of the TV screen collides with the frame rate of the video resulting in an \"animation\" of said refresh rate - the line moving up or down the screen. It's similar to the way rims on a car often look like they are going ... | [] | [] | [
[]
] | |
9e4h4l | why do some offices have a pc connected to a virtual machine? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9e4h4l/eli5why_do_some_offices_have_a_pc_connected_to_a/ | {
"a_id": [
"e5m0n1e",
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"e5m3sbm",
"e5m4lw8"
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"score": [
3,
12,
3,
5,
3
],
"text": [
"In my organization, we dealt with a large amount of sensitive data. SSNs, DOBs, Names, Addresses etc. We are laptop heavy and our rules stated that we were n... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
48jkk7 | how can a state be projected to be won by a candidate with only 1% of the polling reporting in? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/48jkk7/eli5how_can_a_state_be_projected_to_be_won_by_a/ | {
"a_id": [
"d0k2xpy"
],
"score": [
3
],
"text": [
"How can so many idiots ask the same question without reading the goddamn sub?"
]
} | [] | [] | [
[]
] | ||
3ggbvt | why is democracy the go to political system despite its inherent instability with every election. what made it a better choice than something else? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3ggbvt/eli5_why_is_democracy_the_go_to_political_system/ | {
"a_id": [
"ctxuhmf",
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"score": [
10,
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3,
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"text": [
"I'm probably paraphrasing here, but I always dug The old saying that \"Democracy is the wo... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | ||
nen8m | How many calories does the human brain consume in a day? | askscience | http://www.reddit.com/r/askscience/comments/nen8m/how_many_calories_does_the_human_brain_consume_in/ | {
"a_id": [
"c38hevd",
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"c38if7q",
"c38ifyb",
"c38ihq6",
"c38j0pb",
"c38k1qt"
],
... | [] | [] | [
[
"http://chemistry.about.com/od/chemistryfaqs/f/caloriethinkfaq.htm",
"http://answers.google.com/answers/threadview?id=381608"
],
[
"http://www.livestrong.com/article/304577-calories-burned-by-brain-activity/"
],
[
"http://www.nursingassistantcentral.com/blog/2008/100-fascinating-facts-you-... | ||
5cobkg | Can a computer simulation create itself inside itself? | You know, that whole "this is all computer simulation" idea? I was wondering, are there already self replicating simulations? Specifically ones that would run themselves inside... themselves? And if not, would it be theoretically possible? I tried to look it up and I'm only getting conspiracy stuff. | askscience | https://www.reddit.com/r/askscience/comments/5cobkg/can_a_computer_simulation_create_itself_inside/ | {
"a_id": [
"d9y3bi7",
"d9y4681",
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"d9yj49o",
"d9yk3gg",
"d9ykwca",
"d9ynqdz",
"d9yp0tb",
"d9ypg9v",
"d... | [] | [] | [
[
"https://www.youtube.com/watch?v=QtJ77qsLrpw",
"http://www.math.cornell.edu/~lipa/mec/lesson6.html"
],
[
"https://en.wikipedia.org/wiki/Quine_(computing\\)"
],
[
"http://www.visual6502.org/JSSim/index.html"
],
[],
[
"https://en.wikipedia.org/wiki/Simulation_hypothesis"
],
[],... | |
1a9nab | Why does a curling rock turn the same direction the rock is spinning? Why does sweeping reduce the curl? | [This wikipedia article](_URL_0_) suggest that friction increases at sliding speed of skating increases. If that is the case, the rock should turn the opposite direction, as a glass on a table does. I have had a hard time finding information on the mechanism of things sliding on ice, and there seems to be some disagr... | askscience | http://www.reddit.com/r/askscience/comments/1a9nab/why_does_a_curling_rock_turn_the_same_direction/ | {
"a_id": [
"c8vcfud",
"c8vhbn5"
],
"score": [
4,
4
],
"text": [
" > Why does a curling rock turn the same direction the rock is spinning?\n\nI could not find any conclusive evidence either. However, I will point out that the section in Wikipedia article mentioned several alternate explan... | [] | [
"http://en.wikipedia.org/wiki/Premelting#cite_note-Ko-5"
] | [
[],
[]
] | |
6qp47b | Is damage of radiation linearly dependent of radiation exposure? | Two questions: Is staying out in the sun for 10 hours straight the same in terms of risk of cancer as ten hours spread out over a larger timeframe? A simalir is wether a single, large dose of radiation has the same effect as several smaller ones? | askscience | https://www.reddit.com/r/askscience/comments/6qp47b/is_damage_of_radiation_linearly_dependent_of/ | {
"a_id": [
"dkywxpx",
"dkz0ggf",
"dkz0p8o"
],
"score": [
3,
8,
4
],
"text": [
"No 10 hours today =/= 10 hours a month.\nIt's not the dose of radiation that would cause harm but the build up. \nThere is a limit to how much radiation our bodies can take before damage occurs.\n\nThat... | [] | [] | [
[],
[
"https://en.m.wikipedia.org/wiki/Linear_no-threshold_model"
],
[]
] | |
17qijj | Flat or disc-shaped planet | Would a flat or disc-shaped planet (at least the size of Earth) be able to hold orbit around the sun or is the globe shape needed to maintain "aerodynamics"? | askscience | http://www.reddit.com/r/askscience/comments/17qijj/flat_or_discshaped_planet/ | {
"a_id": [
"c880rw1",
"c882sdt"
],
"score": [
6,
2
],
"text": [
"The shape of the object doesn't matter. There's no aerodynamics in space because there's no air. However, a naturally formed planet can't be any other shape due to the laws of gravity.",
"Shape makes absolutely no differ... | [] | [] | [
[],
[]
] | |
1oi99s | why more recently than ever do webpages refresh and not actually go back when you hit the back button? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1oi99s/eli5why_more_recently_than_ever_do_webpages/ | {
"a_id": [
"ccs6c6z",
"ccsa1kh",
"ccsbnc2"
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"score": [
21,
3,
2
],
"text": [
"It is more and more common mispractice to include a 0 second redirect in a site, which as soon as you load a page, redirects you to a slightly different page they actually want you to see. So far, thi... | [] | [] | [
[],
[],
[
"https://adblockplus.org/forum/viewtopic.php?t=11573"
]
] | ||
2y5o1b | why do people tie shoe laces and toss them over power lines? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2y5o1b/eli5_why_do_people_tie_shoe_laces_and_toss_them/ | {
"a_id": [
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"cp6idd2",
"cp6ign2",
"cp6ikav",
"cp6j6mr",
"cp6k398",
"cp6o61q",
"cp6o72u",
"c... | [] | [] | [
[
"http://www.snopes.com/crime/gangs/sneakers.asp"
],
[],
[],
[],
[
"https://vimeo.com/71867019"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"http://threesheetsnw.com/files/2014/09/IMG_2561.jpg"
],
[],
[],
[
"http://i.imgur.com/ufr5y... | ||
3hz57m | What is the difference between Enthalpy (H) and Heat (Q)? | askscience | http://www.reddit.com/r/askscience/comments/3hz57m/what_is_the_difference_between_enthalpy_h_and/ | {
"a_id": [
"cubvvgp",
"cuc9by0"
],
"score": [
35,
3
],
"text": [
"Enthalpy is a Legendre transform of internal energy. It's a state function, so the change in enthalpy between two states doesn't depend on the path you take between those two steps (in fancy words, it's an *exact differenti... | [] | [] | [
[],
[]
] | ||
2i2qzn | Would the water pressure be the same at 100 metres under the surface, even if the water was located in a water tank on land? | askscience | http://www.reddit.com/r/askscience/comments/2i2qzn/would_the_water_pressure_be_the_same_at_100/ | {
"a_id": [
"ckyay8g",
"ckyj1a2"
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"score": [
10,
7
],
"text": [
"Yes.\nThe pressure at any point in the water body depends on three things given negligible air pressure changes. Density of liquid , gravitational constant and height below the surface. Given same g and density , at same de... | [] | [] | [
[],
[]
] | ||
1rzgfd | what's the possibility of puerto rico becoming the 51st state of the us? | edit: these are great answers, thanks guys | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rzgfd/eli5_whats_the_possibility_of_puerto_rico/ | {
"a_id": [
"cdsh31h",
"cdsh6ja"
],
"score": [
3,
3
],
"text": [
"This is a complex issue so I failed miserably at ELI5 so I did an ELI15 instead. I hope that you're OK with this.\n\n---\n\nIn order for Puerto Rico to become a state two things would need to happen.\n\n1 - Puerto Ricans wou... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Lolita_Lebr%C3%B3n",
"http://en.wikipedia.org/wiki/Ponce_massacre"
],
[]
] | |
53q1r4 | would it be possible to replace all of your bones with some sort of metal replica? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/53q1r4/eli5_would_it_be_possible_to_replace_all_of_your/ | {
"a_id": [
"d7v93t0"
],
"score": [
3
],
"text": [
"Short answer: no. For a couple reasons.\n\nFirstly, there's all the biological functions bone has in the body - as a store of calcium, a site for red and white blood cell production, a fat storage location, and probably more I'm forgetting.\n\nSe... | [] | [] | [
[]
] | ||
5y4l89 | who's in charge of coming up with street names and is there any approval by a committee? also, if you were someone that decided street names how did you come up with them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5y4l89/eli5_whos_in_charge_of_coming_up_with_street/ | {
"a_id": [
"den4ljg",
"den9e6q",
"denj8e0"
],
"score": [
8,
2,
3
],
"text": [
"In private developments in Ohio, it's up to the discretion of the developer. For example, the development I live in AND the street I live ON are both named after the developer's grandson... who lived i... | [] | [] | [
[],
[],
[]
] | ||
2qz1dm | what happens to our mind when you spin around? | Why do we get dizzy when we spin around a lot and why is everything out of balance? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2qz1dm/eli5_what_happens_to_our_mind_when_you_spin_around/ | {
"a_id": [
"cnauxer"
],
"score": [
3
],
"text": [
"Nothing happens to your brain. You have fluid in your ear that helps your brain recognize what is up and what is down. When you spin the fluid has to re-equilibrate and while this is happening your brain is confused and the result is nausea, vert... | [] | [] | [
[]
] | |
263kwo | why is there two ways of writing "4" and "a" ? | Why is there two ways to write the lowercase "a" and why is there two ways to write the number "4" ? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/263kwo/eli5why_is_there_two_ways_of_writing_4_and_a/ | {
"a_id": [
"chnbkzj",
"chncop7",
"chnebzk"
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"score": [
14,
9,
3
],
"text": [
"The '4' and 'a' you see on your screen right now (unless you're using an odd font) are the technically correct glyphs, which is why they appear that way in most typefaces unless it's specifically mimic... | [] | [] | [
[],
[],
[
"http://www.mrgori.com/images/Numbers%20font.jpg",
"http://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/LowercaseA.svg/220px-LowercaseA.svg.png",
"http://www.solargauge.com/4kR4DClr.png"
]
] | |
4ou24s | how are movies that were recorded in a lower definition able to be released in higher definitions? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ou24s/eli5_how_are_movies_that_were_recorded_in_a_lower/ | {
"a_id": [
"d4fifto",
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"d4fl24d",
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16,
3,
8,
2,
3
],
"text": [
"They were recorded on film, which isn't limited to an amount of pixels- for the most part.\n\nRemember that they were broadcast on a huge screen.\n\nAs long ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
4oapyx | why does the us armed forces have an army, navy, marines, and coast guard, instead of just an army and navy. | It seems unnecessary to have all these branches when the Navy can just absorb the Coast Guard and the Army can absorb the Marines. To me it seems counter-intuitive for these specialized branches to exist when in reality they are essentially the same branch.
For example, Marines are supposed to specialize in invasion a... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4oapyx/eli5why_does_the_us_armed_forces_have_an_army/ | {
"a_id": [
"d4azitp",
"d4azwji",
"d4b2431"
],
"score": [
3,
3,
54
],
"text": [
"Coast guard is department of homeland security. It has a shit ton of missions... Search and rescue, aids to navigation, drug and migrant interdiction, waterways management, pollution response and preve... | [] | [] | [
[],
[],
[]
] | |
d0enst | What happens to bones when a big animal like a shark or an orca eats and swallows another whole animal? | I've seen several times how an orca eats a whole seal with one bite and then swallows it completly.
But how does it digest the whole animal including all the bones? | askscience | https://www.reddit.com/r/askscience/comments/d0enst/what_happens_to_bones_when_a_big_animal_like_a/ | {
"a_id": [
"ez9ooyz"
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"score": [
15
],
"text": [
"Sharks have a digestive system that's designed to primarily digest meat and fat, so larger bones, chunks of sea turtle shells, things like that are usually vomited back out. \n\n\nAnd orcas have a three-chambered stomach, so the food takes more... | [] | [] | [
[]
] | |
e1txf4 | how do hooves make animals better at climbing mountains? | Wondering how mountain goats are so good a climbing. How to hooves help them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/e1txf4/eli5_how_do_hooves_make_animals_better_at/ | {
"a_id": [
"f8ruupj",
"f8rwsgb",
"f8twe1p"
],
"score": [
32,
10,
2
],
"text": [
"Mountain goats have special hooves that are like a pirate's hook with soft padding to help adjust. They suck at running long distance running but are great at scaling verticle surfaces because of thi... | [] | [] | [
[],
[
"https://www.core77.com/posts/18851/biomimetic-designers-take-note-goat-hooves-confer-ninja-like-climbing-abilities-18851"
],
[]
] | |
gbpm4 | Would phlegm be digested if swallowed? | Our stomach is lined with mucus that protects out stomach wall from digesting itself. So, the stomach mucus must not digestible. Does this mean that if I were to swallow my nasal mucus, it would just sit there until I poop it out? | askscience | http://www.reddit.com/r/askscience/comments/gbpm4/would_phlegm_be_digested_if_swallowed/ | {
"a_id": [
"c1mftxm"
],
"score": [
3
],
"text": [
"The mucous is digested further down in the gut by enzymes in the small bowel and bacteria in the large bowel. "
]
} | [] | [] | [
[]
] | |
8k7ok2 | Have there been periods of greater or lesser volcanic activity on earth, and if so, what causes this variation? | askscience | https://www.reddit.com/r/askscience/comments/8k7ok2/have_there_been_periods_of_greater_or_lesser/ | {
"a_id": [
"dz5q86t",
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"score": [
4,
3,
2
],
"text": [
"In the past there have been more volcanic activities since the Earth was much hotter after accretion. The whole surface would have been a barely cooled crust covered in volcanic pustules. \n\nIt was muc... | [] | [] | [
[
"https://www.nature.com/articles/1779",
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654763/"
],
[
"https://i.imgur.com/6OOMP1E.jpg"
],
[]
] | ||
3vf6ts | Have there ever been memes similar to the modern memes? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3vf6ts/have_there_ever_been_memes_similar_to_the_modern/ | {
"a_id": [
"cxmzwjy"
],
"score": [
6
],
"text": [
"\"Kilroy was here\" is the only thing I can remember. Basically, during ww2 American soldiers would leave these marks on beaches they stormed, places they visited, etc."
]
} | [] | [] | [
[]
] | ||
5jzy0n | nuclear arms race | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5jzy0n/eli5_nuclear_arms_race/ | {
"a_id": [
"dbk8xls",
"dbk9jub"
],
"score": [
2,
2
],
"text": [
"they dont just stockpile the same type of nuke, with time other nations can come up with newer and better delivery methods that cant be stopped or intercepted or your older nukes become incapable of delivering/entering the t... | [] | [] | [
[],
[]
] | ||
utknx | Can any scientists comment on the debate in /r/science regarding a new Alzheimer's vaccine? | Basically, some people think that this article means a new vaccine has been found, while others are saying that all the trial shows is that people didn't die from the vaccine. I now have friend's posting the story on their facebook, so I'd just like to know if its legit or not before people get their hopes up too much.... | askscience | http://www.reddit.com/r/askscience/comments/utknx/can_any_scientists_comment_on_the_debate_in/ | {
"a_id": [
"c4yew06"
],
"score": [
9
],
"text": [
"Based on the abstract (for some reason my institution doesn't have access to the full paper) of the [Lancet Neurology paper](_URL_2_), I'm not too impressed. This was an extremely preliminary study establishing the side effect profile, as well a... | [] | [
"http://www.reddit.com/r/science/comments/usr9l/alzheimers_vaccine_trial_a_success/",
"http://ki.se/ki/jsp/polopoly.jsp?l=en&d=130&a=145109&newsdep=130"
] | [
[
"http://clinicaltrials.gov/ct2/show/NCT00411580",
"clinicaltrials.gov",
"http://www.lancet.com/journals/laneur/article/PIIS1474-4422%2812%2970140-0/fulltext"
]
] | |
1s9e2l | how are people/groups of people legally allowed to place "bounties" on others? | For example the NYC Jewish community offering bounties for people involved in the knockout game or the Black Panthers offering a bounty for George Zimmerman. How is that legal?? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1s9e2l/eli5_how_are_peoplegroups_of_people_legally/ | {
"a_id": [
"cdv837c"
],
"score": [
10
],
"text": [
"They're not \"bounties\" like in the Boba Fett sense. They're rewards to turn over information which would lead to arrest/prosecution. Boba Fett bounties (\"Capture and/or kill this person\") are illegal."
]
} | [] | [] | [
[]
] | |
4306vm | lots of people barely eat vegetables and never take multivitamins, and still seem to be in good health. how is the daily recommended amount of micronutrients calculated, and why do people seem just fine even if they don't get it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4306vm/eli5_lots_of_people_barely_eat_vegetables_and/ | {
"a_id": [
"czefph9",
"czefrj1",
"czel6q3"
],
"score": [
5,
3,
3
],
"text": [
"Pretty much everyone in a developed country gets enough nutrients to stay reasonably healthy unless they are on some kind of super restrictive diet.\n\nThe RDA's are *very* conservative and you have to ... | [] | [] | [
[],
[],
[]
] | ||
dkmtri | If gravitons exist, then is it possible for anti-gravitons to exist and would that mean that the matter they interact with will gain negative gravity? | askscience | https://www.reddit.com/r/askscience/comments/dkmtri/if_gravitons_exist_then_is_it_possible_for/ | {
"a_id": [
"f4iar2p"
],
"score": [
31
],
"text": [
"The graviton would be its own antiparticle in the same way that the photon is also its own antiparticle. No negative gravity needed."
]
} | [] | [] | [
[]
] | ||
rbr9i | How does a globe storm glass barometer work? | I know that the water level changes when the air pressure changes, but how the water level change within the globe that is not exposed to the atmosphere? I don't understand how the water in the globe changes if there is no air going in or out of the globe.
My [storm globe](_URL_0_) | askscience | http://www.reddit.com/r/askscience/comments/rbr9i/how_does_a_globe_storm_glass_barometer_work/ | {
"a_id": [
"c44iy3a"
],
"score": [
8
],
"text": [
"It is open to the atmosphere! That glass pipe off to the side is open, and when the air pressure increases it pushes down on the fluid in the pipe. Through the wonderful nature of hydraulics, the water in the globe then rises. "
]
} | [] | [
"http://i.imgur.com/uNXmS.jpg"
] | [
[]
] | |
vpfgg | What happens to a morbidly obese individual during hydrated starvation? | And how long could a morbidly obese individual survive without food, and with only minimal amount of water? | askscience | http://www.reddit.com/r/askscience/comments/vpfgg/what_happens_to_a_morbidly_obese_individual/ | {
"a_id": [
"c56hicf"
],
"score": [
3
],
"text": [
"Similar - and I emphasize SIMILAR things have been done, although I frankly don't know where to find the study. Googling might pull up something for you. \n\nThey took a fat dude, kept him supplied with fluids and vitamins and the like, and succe... | [] | [] | [
[]
] | |
v9aqs | Is it possible for a planet to exist in our SS that we have yet to discover? | With technology the way that it is, I'm assuming we know without a shadow of a doubt exactly what's within our solar system. So my question is if its even possible for us to have missed something? Maybe a planet that is on the same (or a very similar) orbit as the earth, but constantly on the opposite side of the sun, ... | askscience | http://www.reddit.com/r/askscience/comments/v9aqs/is_it_possible_for_a_planet_to_exist_in_our_ss/ | {
"a_id": [
"c52gbi8",
"c52gtwc",
"c52i087"
],
"score": [
9,
2,
2
],
"text": [
"No, any body large enough to be a real planet would leave a gravitational footprint that could be observed. ",
"There was actually an idea that there might be a planet on the opposite side of the su... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Trans-Neptunian_object"
]
] | |
2emmi2 | why do radio stations sometimes have two frequencies playing the same thing? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2emmi2/eli5_why_do_radio_stations_sometimes_have_two/ | {
"a_id": [
"ck0zz9e"
],
"score": [
2
],
"text": [
"They would probably be broadcasting from different locations, giving the station a wider range."
]
} | [] | [] | [
[]
] | ||
s5nyd | Is there any known species that can see other parts of the electro magnetic spectrum? | askscience | http://www.reddit.com/r/askscience/comments/s5nyd/is_there_any_known_species_that_can_see_other/ | {
"a_id": [
"c4baqqw"
],
"score": [
3
],
"text": [
"Tarsiers and Chameleons can see in the Ultraviolet. Dragonflies can see polarized light (Not a different part of the spectrum, but still cool). The Mantis shrimp is my favorite though. It has the most complex eyes known in the animal kingdom. Lik... | [] | [] | [
[]
] | ||
a9p29l | why do your lips peel when you’re sick? | Currently sick and pissed because my lips hurt | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a9p29l/eli5_why_do_your_lips_peel_when_youre_sick/ | {
"a_id": [
"ecl74a2",
"ecl867k"
],
"score": [
3,
3
],
"text": [
"lip skin is different than regular sin & doesn't make it's own lipid.\n\nIt comes from the skin around your lips & those pores could be clogged. As an experiment you could try AHA cream on that skin, or just get good cha... | [] | [] | [
[],
[]
] | |
yac4f | Japan was separated from their Axis allies by numerous Allied countries. How did they communicate with other Axis powers? | Map [here](_URL_0_)
Also, anyone know what that little country to the northwest of Mongolia is? I know today that would be part of Russia. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/yac4f/japan_was_separated_from_their_axis_allies_by/ | {
"a_id": [
"c5tqze6",
"c5ts7qp",
"c5tullq",
"c5tyjxr",
"c5tzyp1"
],
"score": [
14,
2,
16,
3,
10
],
"text": [
"The little country is Tuva.\n_URL_0_",
"I read somewhere that Germany gave them an Enigma machine.",
"For the most part, they didn't. Top axis and... | [] | [
"http://en.wikipedia.org/wiki/File:WWII.png"
] | [
[
"http://en.wikipedia.org/wiki/Tuva"
],
[],
[],
[],
[
"http://en.wikipedia.org/wiki/German_submarine_U-864",
"http://en.wikipedia.org/wiki/Italian_submarine_Comandante_Cappellini",
"http://en.wikipedia.org/wiki/Germany%E2%80%93Japan_relations#Japan_enters_World_War_II",
"http://en.wik... | |
22hj74 | what is the purpose of so much pollen everywhere? | I get that the more pollen the more likely fertilization will happen, but not every place has the same pollen levels...and also most places don't seem to have anymore plants than others with more or less pollen. So why do plants give off so much pollen? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22hj74/eli5_what_is_the_purpose_of_so_much_pollen/ | {
"a_id": [
"cgmvlv9"
],
"score": [
3
],
"text": [
" > So why do plants give off so much pollen?\n\nTo make sure they have enough. Way out on the edges of the most distant spread of the pollen there may be just enough for fertilization, and the ground covered increases greatly as they put more an... | [] | [] | [
[]
] | |
4rg48u | How can a counterexample to the Collatz(3n+1) conjecture be for a sequence to go towards infinity? | According to this video _URL_0_ and other people, one way that the Collatz conjecture could be disproved is by finding a number that creates a loop such as 4 - > 2 - > 1 - > 4 - > 2 - > 1 ... or by finding a number that wanders off to infinity. What I don't understand is how it's even possible for any sequence to ... | askscience | https://www.reddit.com/r/askscience/comments/4rg48u/how_can_a_counterexample_to_the_collatz3n1/ | {
"a_id": [
"d50udjc",
"d50uo08",
"d515x9r"
],
"score": [
11,
8,
3
],
"text": [
"You can't use statistics on math. For example, half of numbers are even, but there's only one odd power of two, and only one even prime. Similarly, you might end up getting (3n+1)/2 as being odd over a... | [] | [
"https://youtu.be/K0yMyUn--0s?t=413"
] | [
[],
[],
[]
] | |
7n08xw | What did Vikings do with all their loot? Was the loot divided equally among the raiders, given to one man, or somewhere in between? | If it was brought back to Scandinavia, did the influx of loot have any impact on the economy of the region? Perhaps encouraging more trade? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7n08xw/what_did_vikings_do_with_all_their_loot_was_the/ | {
"a_id": [
"dryfezc"
],
"score": [
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],
"text": [
"It certainly did. I recently finished my masters on these lovely individuals and while I do not have all the sources handy with me, hopefully, someone else here will. \n\nTo give you a brief, non-cited explanation, there were several places that... | [] | [] | [
[]
] | |
61qxca | we have a huge sea which is evapourating all the time which comes back to us in the form of rains. we can create artificial rains. why do we worry about water shortage in future? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/61qxca/eli5we_have_a_huge_sea_which_is_evapourating_all/ | {
"a_id": [
"dfgl5gu",
"dfgl9m1",
"dfgla35"
],
"score": [
2,
5,
2
],
"text": [
"We can not create rain from nothing. We are able to seed rain clouds so that the water falls down before it normally would. The problem is that farms require water over a large area which increases evap... | [] | [] | [
[],
[],
[]
] | ||
1n3odz | is artificial photosynthesis not viable? | Quick search on ELI5 gave nothing, Google gave me a few results about recent successes, but no reason why it isn't used. Getting rid of carbon dioxide would generally seem to be a pretty good thing right? Oxygen and glucose are also *fairly* useful things.
Have we simply not yet figured out how plants do the thing? Do... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1n3odz/eli5_is_artificial_photosynthesis_not_viable/ | {
"a_id": [
"ccf5ffb",
"ccf6ixi",
"ccf84hb"
],
"score": [
13,
2,
2
],
"text": [
"Photosynthesis (PS) involves harnessing light (photons) from the sun for energy to drive chemical reactions. Here's an abridged version of the process:\n\n1. A photon strikes an electron that is chil... | [] | [] | [
[
"http://www.daviddarling.info/images/photosynthesis1.gif"
],
[],
[]
] | |
rjvhh | Would a handful of marbles released in empty space exert enough gravity on each other to clump together or even orbit one another? | askscience | http://www.reddit.com/r/askscience/comments/rjvhh/would_a_handful_of_marbles_released_in_empty/ | {
"a_id": [
"c46ff3d",
"c46fg50"
],
"score": [
5,
17
],
"text": [
"If they were released in a perfect vacuum infinitely far from any other gravitational force, so that the only force any of them experienced was from the other marbles, then yes they would clump together. Depending on their ... | [] | [] | [
[],
[
"http://www.wolframalpha.com/input/?i=escape+velocity&a=*C.escape+velocity-_*Formula.dflt-&a=*FS-_**EscapeVelocity.v-.*EscapeVelocity.m-.*EscapeVelocity.r--&f3=5+cm&f=EscapeVelocity.r_5+cm&f4=5+g&f=EscapeVelocity.m_5+g&x=7&y=8"
]
] | ||
4btgkp | how can most low-end phone have a better processor speed than higher-end laptops? | My younger brother is looking at buying a new smartphone so I've been looking at some possibilities for him. What has amazed me is the sort of processor speeds that most low-end (£100-200) smartphones have compared to a higher-end computers.
For example, I have looked at the Huawei P8 Lite:
1.3 GHz Octa-Core (£99 at C... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4btgkp/eli5_how_can_most_lowend_phone_have_a_better/ | {
"a_id": [
"d1c8zpv",
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"d1caup0",
"d1cddia"
],
"score": [
5,
8,
40,
4,
18,
4
],
"text": [
"let me make this music analogy when comparing cpu's of vastly different architectures.\n\n1. cpu speed (aka mhz) is only used to synch... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | |
2etedt | what's happening in my head when sound gets drowned out while falling asleep and then a minor disturbance "opens" up my ears? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2etedt/eli5_whats_happening_in_my_head_when_sound_gets/ | {
"a_id": [
"ck2qlpd",
"ck2qnlo",
"ck2r3k2",
"ck37run"
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"score": [
7,
213,
11,
5
],
"text": [
"I think your mind slowly blocks out all common noise perceived as safe, and you wake when something unusual is heard",
"Your brain differentiates between expected and unexp... | [] | [] | [
[],
[],
[],
[]
] | ||
7w1dua | why is e85 85% ethanol? | What makes that ratio so special? Why not a 50/50 ethanol blend? In fact, why don't they just sell pure ethanol and remove the reliance on petroleum all together? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7w1dua/eli5_why_is_e85_85_ethanol/ | {
"a_id": [
"dtwuwxo",
"dtwv6mo",
"dtx6uey"
],
"score": [
7,
8,
2
],
"text": [
" > What makes that ratio so special?\n\nIt is about as much as every passenger vehicles can take without damaging the engine.\n\n > In fact, why don't they just sell pure ethanol and remove the relian... | [] | [] | [
[],
[],
[]
] | |
cg6jsu | why are nitrites toxic to tank fish, but nitrates are okay? | I understand my ammonia is toxic to fish, ammonia is toxic to a lot of living things, but what makes nitrite and nitrate so different? The only thing separating them is one oxygen atom. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cg6jsu/eli5_why_are_nitrites_toxic_to_tank_fish_but/ | {
"a_id": [
"eueyfyd",
"eui9ef5"
],
"score": [
5,
2
],
"text": [
"That one oxygen atom changes the shape, structure, and function.\n\nFor example Nitrates are used in many fertilizers and explosives. Nitrites are used in food preservation.\n\nNitrates form strong acids and nitrates form we... | [] | [] | [
[],
[
"https://www.reddit.com/user/Fourtires3rims/"
]
] | |
2s4ml7 | why is cancer the most common disease associated with dna mutations? | Is such a large part of DNA devoted to guiding cell reproduction that mutations always seem to lead to cancer? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2s4ml7/eli5why_is_cancer_the_most_common_disease/ | {
"a_id": [
"cnm5nii",
"cnmaao6",
"cnmcd6i"
],
"score": [
5,
3,
2
],
"text": [
"Of all the things that mutations cause (that is, mutations that happen *after* a person has been born), most of them probably just end up with the mutated DNA getting repaired or removed, or the cell th... | [] | [] | [
[],
[],
[]
] | |
dbk0mw | why are some drink powders white but then turn a bright/deep shade after adding water | I noticed this happens with a lot or drink mixes mostly red ones. I'm curious how that works. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dbk0mw/eli5_why_are_some_drink_powders_white_but_then/ | {
"a_id": [
"f22ad3q"
],
"score": [
6
],
"text": [
"Artificial food coloring is extremely concentrated. A couple of granules, hidden among the white granules that make up most of the drink mix, are all it takes."
]
} | [] | [] | [
[]
] | |
6de844 | how and why are books like the great gatsby and of mice and men chosen for reading in english classes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6de844/eli5_how_and_why_are_books_like_the_great_gatsby/ | {
"a_id": [
"di20jhd",
"di216z3",
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"di2a530",
"di2adu4",
"di2b2yf",
"di2bb5y",
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"di2cbu4",
"di2cqg8",
"di2d436",
"di2dy1o",
"di2eeyi",
"di2ehc8",
"di2erho",
"d... | [] | [] | [
[],
[
"https://www.reddit.com/r/explainlikeimfive/comments/6de844/eli5_how_and_why_are_books_like_the_great_gatsby/di26o3c/",
"https://rhynoreviews.wordpress.com/",
"https://www.youtube.com/watch?v=6jDcWAWRRHo",
"http://i.imgur.com/gFLVgp4.png",
"https://amateurproaquarist.wordpress.com/"
],... | ||
r1ka1 | sarcasm and irony | I have a hard time discerning those two. Aren't they basically the same? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/r1ka1/eli5_sarcasm_and_irony/ | {
"a_id": [
"c4280i6",
"c4283aa"
],
"score": [
3,
2
],
"text": [
"Irony: \nThe use of words to convey a meaning that is the opposite of its literal meaning or an outcome of events contrary to what was, or might have been, expected.\n\nSarcasm: A sharply ironical taunt; sneering or cutting ... | [] | [] | [
[
"http://dictionary.reference.com",
"Dictionary.com"
],
[]
] | |
20rx5r | Why are there tigers in Primorye and historically throughout Siberia, but none in the similar ecosystem of Alaska? | Was there something that prevented the migration of Siberian tigers across the land bridge between Asia and the New World? | askscience | http://www.reddit.com/r/askscience/comments/20rx5r/why_are_there_tigers_in_primorye_and_historically/ | {
"a_id": [
"cg6if20"
],
"score": [
2
],
"text": [
"There were a number of large cats that formerly inhabited North America, such as the American Lion: _URL_2_ And the Saber-toothed cat: _URL_1_\n\nThe only species to survive in North America into modern times is the Cougar. _URL_0_"
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Cougar",
"http://en.wikipedia.org/wiki/Saber-toothed_cat",
"http://en.wikipedia.org/wiki/American_lion"
]
] | |
194x8d | What does it mean for a substance to have 0 viscosity? | To my understandsing, when a substance enters a superfluid state, it has a viscosity of 0. To achieve superfluidity a substance (i.e helium) must be pressurized and cooled to fractions of a degree above absolute zero. What properties would one such substance have? | askscience | http://www.reddit.com/r/askscience/comments/194x8d/what_does_it_mean_for_a_substance_to_have_0/ | {
"a_id": [
"c8kvyjz",
"c8kyf1e"
],
"score": [
18,
4
],
"text": [
"It's been a few years since I last did matter at low temp, but IIRC there are a few things that characterise such a state:\n\n - Film flow: superfluids are capable of climbing out of open beakers, even against gravity. Here... | [] | [] | [
[
"http://cryo.gsfc.nasa.gov/introduction/liquid_helium.html",
"http://www.youtube.com/watch?v=kCJ24176enM",
"http://www.youtube.com/watch?v=9pQwemGQ_gE"
],
[]
] | |
4vlhvk | Is there an infinite number of wavelengths on the EM spectrum between 2 wavelengths? | If you take 100nm and 101nm wavelengths, is there an infinite number of wavelengths on the EM spectrum between 2 wavelengths or is this number restricted by Plank's Constant? And if there is an infinite or finite number of wavelengths emitted within the visible spectrum, does black body radiation from the sun emit that... | askscience | https://www.reddit.com/r/askscience/comments/4vlhvk/is_there_an_infinite_number_of_wavelengths_on_the/ | {
"a_id": [
"d5zdylw",
"d5zww5l"
],
"score": [
73,
10
],
"text": [
"No, it's infinite. All wavelengths are allowed.\n\nPlanck's constant cannot do that, and you can deduce that without knowing the physics. The theory of photons is free quantum electrodynamics, which has only two dimensionf... | [] | [] | [
[],
[]
] | |
6rgvis | how come after only a couple days of not working out, i feel and look like i'm not in good shape anymore? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6rgvis/eli5_how_come_after_only_a_couple_days_of_not/ | {
"a_id": [
"dl4ysfg",
"dl5056o",
"dl54pe7",
"dl54txy",
"dl56d2o"
],
"score": [
2,
9,
4,
2,
2
],
"text": [
"It takes a lot of energy to maintain muscle mass. If you aren't using it your body thinks it's better off \"eating\" it. Bodies are built for survival, not ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
7j9st6 | how and why exactly does anxiety affect your whole body? (eg. digestive system, feeling cold, etc) | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7j9st6/eli5_how_and_why_exactly_does_anxiety_affect_your/ | {
"a_id": [
"dr4otxx",
"dr4pjw0",
"dr4tec7"
],
"score": [
17,
14,
2
],
"text": [
"Stress causes your adrenal glands to release adrenaline which causes a wide range of physical symptoms. ",
"Anxiety evolved to deal with threats, so the body can respond accordingly. A lot of the ... | [] | [] | [
[],
[],
[
"https://youtu.be/4Lb5L-VEm34"
]
] | ||
2yh80p | Why was Portugal accepted into NATO? | Specifically, why the isolation for the fascist regime of Franco after the war, but not for the Estado Novo? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2yh80p/why_was_portugal_accepted_into_nato/ | {
"a_id": [
"cpa2rln"
],
"score": [
2
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"text": [
"While both regimes shared very similar outlooks (Corporatist, authoritarian, conservative, anti-communist states) both had significantly different reputations after the 2nd world war. Salazar was an incredibly well regarded statesman, who had a g... | [] | [] | [
[]
] | |
42asda | why do politicians owe favors to their donors? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/42asda/eli5_why_do_politicians_owe_favors_to_their_donors/ | {
"a_id": [
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"score": [
5,
2
],
"text": [
"Let's look at it at a \"before presidency thing\", first. To get to that point you have held one office or another multiple times. You would not have gotten past the first if you were known not to \"repay favours\", as you w... | [] | [] | [
[],
[]
] | |
2iwapf | How far can an ant be removed from the anthill and still find its way home? | Driving away from a parking spot in a park, I see an ant walking across my windshield. I stop and let it off, but I've already driven 30 feet. Is that ant doomed to death? (I thought most ants leave trails behind them to find their way back home. Since the trail is now broken, how will it find its way?) | askscience | http://www.reddit.com/r/askscience/comments/2iwapf/how_far_can_an_ant_be_removed_from_the_anthill/ | {
"a_id": [
"cl64jr4"
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"score": [
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],
"text": [
"This has been asked a lot before so if you want deeper answers you can look them up. Basically if an ant doesn't know where it's trail home is it will start wandering around in random(ish) directions trying to find it. IIRC, they also have a goo... | [] | [] | [
[]
] | |
333omt | why do planes take what seems like huge detours instead of straight lines to the destination? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/333omt/eli5_why_do_planes_take_what_seems_like_huge/ | {
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"cqhcy9a",
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"cqhd0tc",
"cqhd8we",
"c... | [] | [] | [
[],
[
"http://i.dailymail.co.uk/i/pix/2012/04/25/article-2134979-12C1E333000005DC-706_634x377.jpg",
"http://www.quickanddirtytips.com/sites/default/files/styles/insert_small/public/images/6528/flight-paths.jpg?itok=8H6d91UI"
],
[
"http://www.cgg.com/data//1/rec_imgs/9550_orbits.png.jpg"
],
[],... | ||
wwv6e | seriously, how do cell phones work?! | How does a phone (a bunch of wires, glass, etc.) call someone across the country instantly?
Edit: the one thing that still blows my mind, is that all this is done by electricity. Period. I work on all fighter aircraft for the air force. (Computer systems specifically) and to this day , thinking about how intense shit ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/wwv6e/eli5_seriously_how_do_cell_phones_work/ | {
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"score": [
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"text": [
"There are cell towers all over the place and... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
] |
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