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 |
|---|---|---|---|---|---|---|---|---|---|
3aa5lf | what would be the impact on the electrical grid if everyone had electric cars? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3aa5lf/eli5_what_would_be_the_impact_on_the_electrical/ | {
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"From what I understand, one of the challenges that the grids face is not just making sure there is enough power overall but making sure production can match the spikes in demand. Tesla recently came out with a battery for yo... | [] | [] | [
[],
[]
] | ||
2k559b | If there is a normal matter periodic table, is it plausible that there is an anti-periodic table? (e.g. anti-protons and whatnot make anti-elements) | askscience | http://www.reddit.com/r/askscience/comments/2k559b/if_there_is_a_normal_matter_periodic_table_is_it/ | {
"a_id": [
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"score": [
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"text": [
"There sure is! We've even made some of it, \n_URL_0_",
"Yes there is. There is also a [hyper periodic table](_URL_0_). A hypernuclei has one or more nucleons replaced with a hyperon. A hyper... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Antihydrogen"
],
[
"http://phys.org/news186931143.html"
],
[]
] | ||
aaqx8r | Is there good reason that the many worlds interpretation of quantum mechanics is so popular? | The underlying issue I’m having is that science is terrific at not giving anything value without evidence, but I hear about the many worlds interpretation of quantum mechanics all the time.
So I’m wondering first, is there some conceivable method of testing this someday that I’m not aware of? I get that it’s only an ... | askscience | https://www.reddit.com/r/askscience/comments/aaqx8r/is_there_good_reason_that_the_many_worlds/ | {
"a_id": [
"ecud7qa"
],
"score": [
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"text": [
"MWI is popular for a few reasons.\n\nIt is the most direct and simple reading of quantum theory. Many worlds are just the inevitable consequence of the basic equations of quantum mechanics. All other interpretations should then be understood a... | [] | [] | [
[]
] | |
3j45bm | how do they confirm/claim that so and so is killed in air/drone strike? | Do they have a ground force that verifies? How can they identify the victim from air? Does the target organization acknowledge the loss? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3j45bm/eli5_how_do_they_confirmclaim_that_so_and_so_is/ | {
"a_id": [
"cum4amd"
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"score": [
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"text": [
"For the purposes of this discussion, there are two types of targets in a drone strike, actively engaged militants. The various cameras, ground units, observe the people actively do something, such as fire weapons, set up an IED, etc. Once that's ... | [] | [] | [
[]
] | |
azaekd | why do people see a red or blue glow on edges of objects on wearing glasses (looking sideways towards the object)? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/azaekd/eli5_why_do_people_see_a_red_or_blue_glow_on/ | {
"a_id": [
"ei6erjs"
],
"score": [
7
],
"text": [
"Chromatic aberration, it is due to light of different frequency being bent different amounts by a lens. It is why a prism can be used to split light into a rainbow, and it is attempted to be minimized for optical lenses (but usually shows up at t... | [] | [] | [
[]
] | ||
2rj7k9 | Where to buy or reprint maps of Medieval-era Europe and the British Isles? | Sorry this isn't an event-specific question, more to do with research methods. I read through the rules, and it didn't say anything about not making posts like this. And I could really use the help!
Let's say you were a Professor focusing on the early 14th century Europe - specifically Medieval Wales. You want to pur... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2rj7k9/where_to_buy_or_reprint_maps_of_medievalera/ | {
"a_id": [
"cngcwf2"
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"text": [
"This is not specifically for Wales, but I know that the National Library of Scotland has an amazing maps collection, most of which is currently digitized and browsable [online](_URL_0_). You can order prints of these maps online as well in variou... | [] | [] | [
[
"http://maps.nls.uk/"
]
] | |
2o0mro | Are all mammals equally warm blooded? and what makes 37° so ideal? | I'm wondering whether all warm blooded animals have the same operation temperature?
And what is it that determines what that temperature is? | askscience | http://www.reddit.com/r/askscience/comments/2o0mro/are_all_mammals_equally_warm_blooded_and_what/ | {
"a_id": [
"cmj3576",
"cmj3jew",
"cmjk09v"
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"score": [
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4,
5
],
"text": [
"No, different mammals have different operational temperatures. Dogs and cats run hotter than humans (around 101.5F/38.5C rather than 98.6F/37C). [This study](_URL_0_) shows that elephants run colder, ... | [] | [] | [
[
"http://www.pnas.org/content/22/6/405.full.pdf"
],
[
"http://izt.ciens.ucv.ve/ecologia/Archivos/ECO_POB%202008/ECOPO2_2008/Clarke%20y%20Rothery%202008.pdf"
],
[]
] | |
1ji1s5 | Would a 9mm black hole (mass ~Earth) be able to consume the sun? | askscience | http://www.reddit.com/r/askscience/comments/1ji1s5/would_a_9mm_black_hole_mass_earth_be_able_to/ | {
"a_id": [
"cbev0z3",
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"score": [
3,
3
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"text": [
"Eventually it must. Mass near the black hole undergoing random motion is likely to fall into the event horizon, which has a twofold effect. Firstly, this increases the mass and therefore gravity of the black hole. Secondly, ... | [] | [] | [
[],
[]
] | ||
adl7dd | Is the Sun bright enough to be seen by planets orbiting other stars? | I know it would depend on the distance between said planets and the Sun, but how bright might it appear in the night sky of those planets?
I guess the question I'm really asking is: relative to the other stars in the Milky Way, how bright is the Sun? | askscience | https://www.reddit.com/r/askscience/comments/adl7dd/is_the_sun_bright_enough_to_be_seen_by_planets/ | {
"a_id": [
"edjr6o8"
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"score": [
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],
"text": [
"The dark adapted human eye gazing into a clear calm dark sky can detect stars as dim as the 6th magnitude. But to make answering the question a bit easier, let's make the limit magnitude 5.\n\nAs luck would have it, the absolute magnitude of t... | [] | [] | [
[
"http://www.recons.org/census.posted.htm"
]
] | |
pwymt | Can predatory animals follow hoof/footprints? | Walking with Cavemen, pt. 2 by the BBC (at 6:25), said that no animal on earth other than Humans (or Homo Ergaster)
can recognize hoof-prints as the sign of an animal's passing. If that is so, how do large predatory animals actually find prey? Are they limited to observation of the herd, or can they recognize dropping... | askscience | http://www.reddit.com/r/askscience/comments/pwymt/can_predatory_animals_follow_hooffootprints/ | {
"a_id": [
"c3sw6vs"
],
"score": [
7
],
"text": [
"They track by scent or simply wander around likely areas until they hear, see or smell prey"
]
} | [] | [] | [
[]
] | |
kl43u | what would happen if you were in outer space naked? | Is it true your blood would boil? What does blood boil mean? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/kl43u/eli5_what_would_happen_if_you_were_in_outer_space/ | {
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"score": [
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2,
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"text": [
"\"When the human body is suddenly exposed to the vacuum of space, a number of injuries begin to occur immediately. Though they are relat... | [] | [] | [
[],
[],
[
"http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html"
],
[],
[],
[
"http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html"
]
] | |
1tdnep | how do people develop an immunity to something? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1tdnep/eli5_how_do_people_develop_an_immunity_to/ | {
"a_id": [
"ce6vx5k",
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"score": [
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3,
3
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"text": [
"The simplest way is by exposure. If you go to a foreign country you might get sick from drinking the tap water but residents do not. They've developed the appropriate bacteria in their digestive syste... | [] | [] | [
[],
[],
[]
] | ||
1f6e72 | What functions do histamine induced inflammation, bronchoconstriction, hives, etc serve for the body? | Obviously swelling, irritation, and pain caused by allergic reactions is completely useless when the body is reacting to harmless materials.
But in the presence of something actually harmful to the body, how does getting congested or making breathing difficult help the body deal with the material? Is it just the body ... | askscience | http://www.reddit.com/r/askscience/comments/1f6e72/what_functions_do_histamine_induced_inflammation/ | {
"a_id": [
"ca7axb6"
],
"score": [
4
],
"text": [
"inflammation will cause your immune cells to traffic to the source of the inflammation where they can act in the immune response, it will also effectively napalm the area"
]
} | [] | [] | [
[]
] | |
7cqrfy | why do we eat maple syrup but not pine syrup or elm syrup or oak syrup? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7cqrfy/eli5_why_do_we_eat_maple_syrup_but_not_pine_syrup/ | {
"a_id": [
"dprwww6",
"dprxdrl"
],
"score": [
2,
8
],
"text": [
"Simply because the sap of the sugar maple tree is incredibly high in sugar. These others do not compare -- they don't taste good.",
"We can and do eat birch syrup, walnut syrup, and the syrups of a few other trees.\n\nTh... | [] | [] | [
[],
[]
] | ||
1mmr5d | According to Wikipedia, the Chernobyl Nuclear Power Plant kept running for at least 5 more years after the disaster. How did they do this? | Was there no danger in running the disastrous plant, and were there workers there to keep the plant running? Why wasn't the plant just shut down after the worst nuclear disaster in history? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1mmr5d/according_to_wikipedia_the_chernobyl_nuclear/ | {
"a_id": [
"ccanw7c"
],
"score": [
104
],
"text": [
"Simply put, there was an energy shortage in the Ukraine, and the three remaining functional reactors at Chernobyl Nuclear Power Plant were required to keep operating because of this shortage.\n\nAdditionally, it's not just a case of turning th... | [] | [] | [
[
"http://www.youtube.com/watch?v=njTQaUCk4KY",
"http://www.youtube.com/watch?v=TInLul3CCew"
]
] | |
3nql7s | with all the economic sanctions that are in place against russia and with the general state their economy is in, how can russia afford to invest so much into their syrian campaign? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3nql7s/eli5_with_all_the_economic_sanctions_that_are_in/ | {
"a_id": [
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"score": [
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"text": [
"When economists say scary words like *recession* and *collapsing* economy, they usually mean that the economy of a country stopped growing short term. Russia is 3.2%^^made ^^up poorer than it was in January, 2015? That means... | [] | [] | [
[],
[]
] | ||
104vzt | Why does my microwave turn bread rolls into pure carbon in less than no time? | askscience | http://www.reddit.com/r/askscience/comments/104vzt/why_does_my_microwave_turn_bread_rolls_into_pure/ | {
"a_id": [
"c6aeu6l",
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"score": [
2,
3
],
"text": [
"Interesting question. I've also thought of this when burning food in the microwave. Im Interested to see the answers.",
"Excuse me for saying this but that picture is hilarious."
]
} | [] | [] | [
[],
[]
] | ||
4pd6zz | Piles of bodies on the battlefield in the American Civil War | I'm currently writing a short essay on GoT S06E09, "The Battle of the Bastards", and one part of it focuses on the mounds of dead bodies that form. Now, I have medieval sources on Dupplin Moor and Agincourt, as well as Keegan and Roger's opinions on Agincourt, but apparently the mounds were based on accounts from the A... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4pd6zz/piles_of_bodies_on_the_battlefield_in_the/ | {
"a_id": [
"d4jzyj3",
"d4k4x0s",
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"score": [
3,
2,
3
],
"text": [
"I have no expertise on the American Civil War, but for Agincourt, you might also want to look at Curry's *Agincourt: A New History*, in place or as a supplement to Keegan, who makes some rather iffy sta... | [] | [] | [
[],
[],
[]
] | |
7ilg18 | why do video games all have such similar bugs? | Why do video games, made for years and years, by different companies all over the planet tend to have the same sort of bugs and technical difficulties?
For instance, falling through the map, items floating when they should be attached to someone or in their hands, ragdolls becoming kites that fly around. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7ilg18/eli5_why_do_video_games_all_have_such_similar_bugs/ | {
"a_id": [
"dqzn039",
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"score": [
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17,
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],
"text": [
"They're probably bugs that are inherent to animation and the physics coding behind them. You see a lot of similar issues when making cgi animation for movies. ",
"because developers don't start tru... | [] | [] | [
[],
[],
[]
] | |
fbj2z | I just found out my library card gives me access to EBSCO. What journals should I be reading? | I'm interested in space, quantum physics, computer science, cancer research, toxicology and psychology among other things. | askscience | http://www.reddit.com/r/askscience/comments/fbj2z/i_just_found_out_my_library_card_gives_me_access/ | {
"a_id": [
"c1epelf",
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"score": [
3,
6
],
"text": [
"Nature and American Scientific?",
"Check out the abstracts of Nature and Science and Physical Review Letters."
]
} | [] | [] | [
[],
[]
] | |
1sxy62 | how do official movie soundtracks work? sometimes i hear the song in the movie and other times i don't. | I was listening to a soundtrack to a movie the other day, and I realized I didn't hear any of the songs on the soundtrack in the actual movie. But there have been times when I've been listening to a soundtrack where I have heard all of the songs in the movie. Do they make songs that are themed like the movie? I'm just ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1sxy62/eli5how_do_official_movie_soundtracks_work/ | {
"a_id": [
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"score": [
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"text": [
"Sometimes you'll see on a soundtrack where it says \"songs inspired by\". So sometimes not all the songs get used in the movie or were never meant to be used in the movie at all. Sometimes songs will get licensed to be used... | [] | [] | [
[],
[]
] | |
41ii94 | how come a soft cookie becomes hard when it is stale while a hard cookie gets soft? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/41ii94/eli5_how_come_a_soft_cookie_becomes_hard_when_it/ | {
"a_id": [
"cz2lq4i",
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"score": [
174,
9,
3
],
"text": [
"Because they adjust to the humidity of the surrounding air. The \"humidity\" of fresh soft cookies is above the humidity of air, so they get drier with time. However, the humidity of fresh dry cookies... | [] | [] | [
[],
[
"http://www.hmrc.gov.uk/manuals/vfoodmanual/vfood6260.htm"
],
[]
] | ||
2c7dck | Why do some germs die on contact with air, but others stay alive for days on surfaces? | askscience | http://www.reddit.com/r/askscience/comments/2c7dck/why_do_some_germs_die_on_contact_with_air_but/ | {
"a_id": [
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"score": [
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3,
2
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"text": [
"It has a lot to do with an organism's physical characteristics and biology. For example, an enveloped virus (having a membrane surrounding the viral capsid) versus a non-enveloped virus, or bacteria suc... | [] | [] | [
[],
[],
[
"http://www.nrcresearchpress.com/doi/abs/10.1139/m60-011#.U9ognKYt8YU",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2135764/pdf/87.pdf",
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC545329/pdf/jbacter00766-0028.pdf"
]
] | ||
5gybwf | How does Hubble's Law affect the size of the visible universe? | I'm only a layman in terms of astrophysics, so I'm sure that my understanding of some of the concepts involved are lacking, but I never was quite satisfied with the explanation that I was given in my astronomy class as to the limits of the size of the visible universe.
It makes sense to me that being as the Universe i... | askscience | https://www.reddit.com/r/askscience/comments/5gybwf/how_does_hubbles_law_affect_the_size_of_the/ | {
"a_id": [
"daxaqaw"
],
"score": [
2
],
"text": [
"There is a part of space called the observable universe. It is ~93 Billion lightyears across. This is all the light that has managed to reach us. This light is 13.8 billion years old but due to the expansion of space these objects would now be 93... | [] | [] | [
[]
] | |
2ccke9 | How effective were partisan armies in aiding the Allies in occupied Western Europe during WWII? | I'm sure that there's a variety of competency between units here, but overall, how much of in impact did these fighters have on the war? Were they a major hindrance on the Nazi's efforts, or did the Wehrmacht succeed in stifling them.
I'm sticking to Western Europe because that's an area I'm interested in, but feel f... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ccke9/how_effective_were_partisan_armies_in_aiding_the/ | {
"a_id": [
"cje5pa7"
],
"score": [
8
],
"text": [
"You're using the term \"partisan\" correctly.\n\nIt would be wrong to say that the Wehrmacht even \"succeeded\" in stifling them—the forces stationed in France to defend against an Allied attack spent most of their time training, and precious lit... | [] | [] | [
[]
] | |
7h9mp8 | how does graphite stay on paper? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7h9mp8/eli5_how_does_graphite_stay_on_paper/ | {
"a_id": [
"dqp84e8"
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"score": [
80
],
"text": [
"Graphite is relatively soft, and as you scrape it along a surface, tiny bits of it crumble away and stay behind. These bits are insaaanely individually tiny and make up an extremely fine powder. \nPaper is not as smooth as you might think. It's ... | [] | [] | [
[]
] | ||
16pjaj | how are vitamin daily recommended values established and how accurate are they? | I'm eating these delicious vitamin c gummy candy things and was wondering. | askscience | http://www.reddit.com/r/askscience/comments/16pjaj/how_are_vitamin_daily_recommended_values/ | {
"a_id": [
"c7ykifq"
],
"score": [
3
],
"text": [
"In a number of cases, these guidelines are based upon calculated amounts required to avoid deficiency related disease. The vitamin C guideline for example was established to prevent the development of scurvy if vitamin C intake was to cease for 3... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Vitamin_poisoning"
]
] | |
2li1qz | Hormones can be used to grow breasts in males, so why can't they be used in females to augment breast size? | askscience | http://www.reddit.com/r/askscience/comments/2li1qz/hormones_can_be_used_to_grow_breasts_in_males_so/ | {
"a_id": [
"clvtj8e",
"clvwtvg"
],
"score": [
10,
5
],
"text": [
"Hormones *can* be used in females to augment breast size. I suppose the simplest example of this would be birth control pills. The pill boosts estrogen levels in females and as a side effect of preventing pregnancy, breast ... | [] | [] | [
[],
[]
] | ||
1l68f5 | why put money into savings, with inflation being so high? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1l68f5/eli5_why_put_money_into_savings_with_inflation/ | {
"a_id": [
"cbw50a4",
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"score": [
2,
2,
2
],
"text": [
"It's a largely safe investment compared to other things. A steady interest rate makes people feel more secure than investing that money in stocks or real estate.",
"Inflation is very *low* right now... | [] | [] | [
[],
[],
[]
] | ||
1yhgj6 | What is the general consensus regarding the veracity of "El Dorado?" Do any credible archaeologists believe it ever existed, or is it purely myth? | I am curious to know if anyone has bothered looking for it since the conquistadors gave up. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1yhgj6/what_is_the_general_consensus_regarding_the/ | {
"a_id": [
"cfkkzz0"
],
"score": [
6
],
"text": [
"Through the use of things like satellite imagery, I'd imagine it would've been found by now if it did exist. Anyways, I did some research through some peer-reviewed articles. Here are my findings:\n\n\"Though there had been earlier searches for l... | [] | [] | [
[
"http://www.amazon.co.uk/dp/1842124455"
]
] | |
anb1gr | why is ‘utopia’ preceded by ‘a’ instead of ‘an’ ? | for instance, 'i tried to build a utopia' | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/anb1gr/eli5_why_is_utopia_preceded_by_a_instead_of_an/ | {
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"efs1luf",
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"score": [
6,
24,
2,
2
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"text": [
"Because we put \"an\" before a vowel *sound*, not before a vowel. That's why you say \"an hour\", because you don't voice the h. ",
"Despite starting with a vowel, Utopia, Ute... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Glottal_stop"
]
] | |
4el7iw | How did the Christian view of the end times change? Did some loose faith when the apocalypse never happened? | I think i saw a thread on this, but no matter what i search i cannot find it.
From what i understand many early christians (thinking mostly about romans, but also medieval) believed that the end times was something that was not far off? When nothing happened after century after century was there any change in christia... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4el7iw/how_did_the_christian_view_of_the_end_times/ | {
"a_id": [
"d21lkyj"
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"score": [
4
],
"text": [
"Effects on the canon: Martin Luther wanted to drop the the book of Revelation (along with a few others) from the Protestant canon, but was ultimately unsuccessful. But this had more to do with conflicts with certain aspects of his theology than ... | [] | [] | [
[]
] | |
enuztz | why is reading books viewed as such a good thing? i see new-resolutions all the time with books in mind. | I would understand if it were books that were educational, however I often see fiction refered. What makes reading so good? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/enuztz/eli5_why_is_reading_books_viewed_as_such_a_good/ | {
"a_id": [
"fe5kfm9",
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"score": [
9,
5
],
"text": [
"TLDR: your brain is a muscle that needs to be exercised. \n\nReading, no matter if it’s for leisure or for education, is always good for you. Fiction books are no less important to read than non-fiction books. With fiction b... | [] | [] | [
[],
[]
] | |
1ibee7 | What's the deal with active bacterial cultures (probiotics) in yogurt and other dairy products? | I was recently pitched directly about some Danone yogurt that contained bacterial cultures called Bifidus Regularis (whether that's a trademarked name or an actual designation I'm unsure) and it got me thinking whether the whole probiotic craze in yogurt/dairy is of any actual benefit to the consumer or just a marketin... | askscience | http://www.reddit.com/r/askscience/comments/1ibee7/whats_the_deal_with_active_bacterial_cultures/ | {
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"*Bididus Regularis* is a marketing name for a subspecies of [*Bifidobacterium animalis*](_URL_1_). I believe the marketing strategy is based on the fact that there are 'good' bacteria in our gut (microbiota / commensal bacteria). There have been ... | [] | [] | [
[
"http://www.guardian.co.uk/theguardian/2009/jul/25/probiotic-health-benefits",
"http://en.wikipedia.org/wiki/Bifidobacterium_animalis"
]
] | |
5z5b2f | birds don't need goggles to protect their eyes from the wind. why? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5z5b2f/eli5_birds_dont_need_goggles_to_protect_their/ | {
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"text": [
"Birds have built in [goggles](_URL_0_). A special clear third eyelid.",
"The have a second eyelid that acts as goggles its clear. Turkeys are the only one I've seen up clo... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Nictitating_membrane"
],
[],
[],
[
"http://www.sciencemag.org/news/2016/12/watch-parrot-wearing-goggles-fly-through-laser-sheet"
]
] | ||
1tyzdk | nasa said today the sun has/is going to "flip upside down" and its magnetic poles have reversed. what does this mean and would it have any effects on earth? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1tyzdk/eli5nasa_said_today_the_sun_hasis_going_to_flip/ | {
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"text": [
"The sun's magnetic field reverses every 11 years or so.\n\nIt happens during times of high solar activity, so flares are more likely and could potentially disrupt satellite communications temporarily. You will also get more brilliant aurorae and... | [] | [] | [
[]
] | ||
12188u | If "spent" nuclear fuel is still glowing hot when removed for several years, why can't we keep using it to turn a steam turbine? | askscience | http://www.reddit.com/r/askscience/comments/12188u/if_spent_nuclear_fuel_is_still_glowing_hot_when/ | {
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"That blue glow isn't heat, it's Cherenkov radiation, caused by high speed charged particles entering a matrix(the water) where the speed of light through the medium is less than their speed. The period of high decay heat is ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Cherenkov_radiation",
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[]
] | ||
1rsmwl | why do dogs bite air? | When I blow on my dogs face she bites. She also bites when sticking her head out the window.. Why? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rsmwl/eli5_why_do_dogs_bite_air/ | {
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"Because she feels something there.\n\nDogs pick up things with their mouths, and while they may paw at items to get to them (like a bone in a corner or under a table), when it's in reach they go after it with their mouths.\n\nOther animals, who a... | [] | [] | [
[
"http://www.youtube.com/watch?v=l57WtPQRvK0"
]
] | |
1sdic5 | how do they shoot scenes of people being blown up or suffering severe trauma? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1sdic5/eli5_how_do_they_shoot_scenes_of_people_being/ | {
"a_id": [
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"text": [
"Either with CGI or practical effects/special effects makeup or a bit of both. You wouldn't believe how convincingly a skilled makeup artist can make someone look like they're have a *really* bad day. Do a quick image search on special effects mak... | [] | [] | [
[]
] | ||
3atqoz | are all spicy foods spicy because of capsaicin? are there different types of 'spicy'? what about cinnamon or onions? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3atqoz/eli5_are_all_spicy_foods_spicy_because_of/ | {
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"Not all spicy foods contain capsaicin. Mustard gets its spice from mixing water with two compounds, myrosin and sinigri. Wasabi's kick comes from something called allyl isothiocyanate which is the same for horseradish. Cinnamon gets its spiciness... | [] | [] | [
[]
] | ||
5s0c8a | Do NSAIDs (Paracetamol, etc...) slow down recovery from infections? | edit: It has been brought to my attention that paracetamol doesn't fall in the category of NSAIDs, so I've rephrased the post somewhat.
Several medications can be used to reduce fever and/or inflammation, for example paracetamol (tylenol in the US) or NSAIDs (ibuprofen and others). But as I understood it, fever and in... | askscience | https://www.reddit.com/r/askscience/comments/5s0c8a/do_nsaids_paracetamol_etc_slow_down_recovery_from/ | {
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"No I would say thats not something tha... | [] | [] | [
[],
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"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3259713/"
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"http://www.wessexics.com/The_Bottom_Line/Review/?id=7257804966227311886"
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[],
[],
[],
... | |
n7mei | Are their any cases of animals that live in groups that lack any form of social hierarchy | I was thinking today about how as human beings we have leaders for all sorts of things and I drew parallels between us and other animals like wolves and apes who also have social hierarchies. I was just curious if there are any animals on earth who both live in groups yet lack any sort of social hierarchy. | askscience | http://www.reddit.com/r/askscience/comments/n7mei/are_their_any_cases_of_animals_that_live_in/ | {
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"text": [
"schools of fish, or certain flocking birds don't seem to have a social structure other than follow those around you.",
"I work with ... | [] | [] | [
[],
[],
[],
[],
[],
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] | |
35ft31 | why does traveling at very high speeds, or going within the soi of celestial bodies with high gravity slow down time for the people in those situations, according to the theory of relativity? | i can't visualize in my head how high gravity or speeds could slow stuff down. for example, take miller's planet in interstellar. when brand, doyle, cooper, and case are futzing around down there, if romilly (orbiting in the endurance) were to somehow take a telescope and observe them on the planet's surface, would it ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/35ft31/eli5why_does_traveling_at_very_high_speeds_or/ | {
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"Gravity curves spacetime. \n \n > if romilly (orbiting in the endurance) were to somehow take a telescope and observe them on the planet's surface, would it look like they were moving in slow motion? \n \nYes, if you look up the Wiki page on... | [] | [] | [
[]
] | |
a09dpz | How come Volkswagen doesn’t have a stigma of being founded by the Nazis? Did the Allies ever try to erase it? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a09dpz/how_come_volkswagen_doesnt_have_a_stigma_of_being/ | {
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"Not only did the allied powers not try to erase Volkswagen, they basically created the company we now know. The following comes from James Flink's *The Automobile Age.* \n\nAs was mentioned elsewhere, the Volkswagen Beetle ... | [] | [] | [
[
"https://jalopnik.com/i-drove-the-earliest-ancestor-of-the-vw-beetle-and-it-w-1660193161",
"https://jalopnik.com/this-photo-of-an-effigy-of-a-volkswagen-from-nazi-germa-1826576375",
"https://www.amazon.com/Extraordinary-Life-Josef-Ganz-Volkswagen/dp/1614122032",
"https://jalopnik.com/meet-the-car-... | ||
1pvmg8 | what is port forwarding? i want to maximize my online multiplayer on gaming consoles, should i use it? | People have asked this questions before but I still don't get it. I would love a simple explanation and to know if it is practical for my usage. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1pvmg8/eli5_what_is_port_forwarding_i_want_to_maximize/ | {
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"So you have a router. And multiple devices that consume your internet connection (phones, pcs, tablets, toasters, etc).\nEvery connection made from any device... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Universal_Plug_and_Play"
],
[],
[],
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1sh5wq | rainbow universes or something | I have no idea what this artical is talking about. _URL_0_
It was posted in the physics reddit but no one seems to know what it means in a way I can understand.
I'm normaly pretty good at physics but I was blown away by all the jargon these people use. Please help. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1sh5wq/eli5rainbow_universes_or_something/ | {
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"Basically it is saying that different wavelenghts of light corresponding to different energies (by c=λv) would be affected differently by gravity. This is because in relativity, mass is just one expression of energy. If this theory is correct, th... | [] | [
"http://iopscience.iop.org/1475-7516/2013/10/052/pdf/1475-7516_2013_10_052.pdf"
] | [
[]
] | |
fz03y | Is there an easy to remember formula for calculating the cooling time of a given amount of liquid? | A couple of months ago, I tried to google a formula for calculating how long it would take to cool a can of beer to about 3 degrees Celcius (I'm Swedish, hence the non-Fahrenheit units).
Based on a thread I found in some random forum, I gathered the following:
4,18 (some kind of constant?) x [Amount of liquid in lit... | askscience | http://www.reddit.com/r/askscience/comments/fz03y/is_there_an_easy_to_remember_formula_for/ | {
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"text": [
"In principle, yes. It's Newton's law of cooling. But in practice, no. On the scale found in a kitchen, the approximations necessary to use the formula are significant. For instance, Newton's law requires that the temperature... | [] | [] | [
[],
[]
] | |
2hz9tq | how does touching work? (sensation of feeling different surfaces) | Why I ask:
Im curious if, by very weak but accurate static/electrical stimulation, the brain can be tricked into feeling surfaces which aren't there. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2hz9tq/eli5_how_does_touching_work_sensation_of_feeling/ | {
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"text": [
"Touching and other sensory inputs (except for the special senses) are mediated via corpuscles. There are 4 types of them and they have sense various stimuli like pain, temperatures, pressure etc.\n\nIn theory, what you described could be possible... | [] | [] | [
[]
] | |
620dzz | why do our cheeks hurt when we eat extremely sour sweats/food? what causes it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/620dzz/eli5_why_do_our_cheeks_hurt_when_we_eat_extremely/ | {
"a_id": [
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"text": [
"You are feeling the extreme activation of your *salivary glands.* The presence of very sour foods makes you produce much more saliva than normal, very suddenly, and this action feels uncomfortable."
]
} | [] | [] | [
[]
] | ||
2lowe5 | Where did/does 'Beethoven' lie? | The last name "van Beethoven" as in Ludwig van Beethoven means "from Beethoven" in dutch. But where does, or did, Beethoven lie? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2lowe5/where_diddoes_beethoven_lie/ | {
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"Ludwig van Beethoven was born in Bonn in the Archbishopric/Electorate of Cologne (one of the many German states that existed prior to unification in 1871), like his father Johann. Ludwig's grandfather and namesake was born in the Spanish Netherl... | [] | [] | [
[]
] | |
36dnnq | why does a white noise, such as a ceiling fan, help me fall asleep, but random noises annoy me while trying to sleep? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/36dnnq/eli5_why_does_a_white_noise_such_as_a_ceiling_fan/ | {
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[],
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"https://www.youtube.com/watch?v=DaiLpUZ2DN... | ||
9c6088 | Aside from their height, how did the fitness and body shape of nomadic/pastoral humans of prehistory compare to modern fitness ideals? Did this change with the adoption of agriculture? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9c6088/aside_from_their_height_how_did_the_fitness_and/ | {
"a_id": [
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"text": [
"You may wish to post or crosspost this on r/AskAnthropology as well."
]
} | [] | [] | [
[]
] | ||
et3afl | How & when did Egypt go from Shi'a to Sunni? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/et3afl/how_when_did_egypt_go_from_shia_to_sunni/ | {
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"It didn't; Egypt was never Shi'a. They were ruled over by a Shi'a dynasty, the Fatimids between 969 and 1171, but the Fatimids never imposed their religious views on the population and, consequently, the majority of the population remained Sunni... | [] | [] | [
[
"https://15minutehistory.org/podcast/episode-61-the-fatimids/"
]
] | ||
81z86k | Why does the first amendment of the US constitution protect freedom of religion? Did many hardline Protestants protest this? | From what I understand, the former English colonies in 1787 had effectively no non-Protestant population. There were some old Catholic families in Maryland, a few thousand Catholic Irishmen across the country, and very tiny Sephardi Jewish communities in certain coastal cities. Although some individual colonies were fo... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/81z86k/why_does_the_first_amendment_of_the_us/ | {
"a_id": [
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"text": [
"While you are waiting for an answer you can take a look at this book The Founding Fathers and the Place of Religion in America by Frank Lambert. Its great and will clear up a lot of your misconceptions."
]
} | [] | [] | [
[]
] | |
6i0owh | What have we learned about the Higgs Boson since the LHC came online? | There was a lot of news when the Higgs was first detected, but it's been pretty quiet in the media since. What have particle physicists been learning, or doing, since then? | askscience | https://www.reddit.com/r/askscience/comments/6i0owh/what_have_we_learned_about_the_higgs_boson_since/ | {
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"text": [
"Basically, when it was discovered, all we learned was that we found a new boson at a mass of 125 GeV. Thus it was called a \"Higgs-like\" particle. Since then we have been measuring all sorts of other properties of the parti... | [] | [] | [
[],
[]
] | |
8bslim | how is the new european gdpr law even enforceable against us companies? | I keep hearing that US-based businesses that do business with people in the EU will have to comply with GDPR laws, even if said business has no physical presence in the EU.
Hypothetically, say someone from the US owns a small website that sells subscriptions to access content, and someone from England buys a subscript... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8bslim/eli5_how_is_the_new_european_gdpr_law_even/ | {
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"If a company is big enough to be operating in the EU, they will have servers dedicated for EU users wherein their data is stored. Such data is not allowed to leave the EU by law (lol), so it's easily enforceable to have them... | [] | [] | [
[],
[]
] | |
3lnn84 | Why was Eisenhower rise through the ranks so fast? | I found his dates of promotion [here](_URL_0_). I know it's Wikipedia, but that part at least seems to have a good source. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3lnn84/why_was_eisenhower_rise_through_the_ranks_so_fast/ | {
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"Eisenhower had the \"benefit\" of two world wars to enhance his promotion speeds. Going by those dates, he was commissioned a 2LT in 1915, and became a 1LT a year later. Quick, but that is historically a fairly quick process. The jump to CPT was ... | [] | [
"https://en.wikipedia.org/wiki/Military_career_of_Dwight_D._Eisenhower#Dates_of_rank"
] | [
[
"http://www.history.army.mil/brochures/ike/ike.htm"
]
] | |
71vqy2 | How real is the threat of human extinction by gamma ray bursts? | Recently watched this video _URL_0_ and now I'm terrified, should I be terrified or am I overreacting? | askscience | https://www.reddit.com/r/askscience/comments/71vqy2/how_real_is_the_threat_of_human_extinction_by/ | {
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"text": [
"This is a difficult question to answer scientifically without more knowledge of the mechanisms of how gamma ray bursts are created, specifically the range at which they are extinction-level events.\n\nThe only real evidenc... | [] | [
"https://youtu.be/qqw41X3tai0"
] | [
[],
[]
] | |
3eh0z2 | why aren't more people on a structured starvation plan versus undergoing gastric bypass surgery which essentially is structured starvation? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3eh0z2/eli5_why_arent_more_people_on_a_structured/ | {
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"text": [
"Because structured starvation plans don't work very well. They do try diet plans before resorting to gastric bypass surgery.",
"If they had enough impulse control to stick to a... | [] | [] | [
[],
[],
[],
[]
] | ||
1i1pc3 | Money is no object to me, and I've decided I want to take a trip to the moon. How much would this cost me today? | askscience | http://www.reddit.com/r/askscience/comments/1i1pc3/money_is_no_object_to_me_and_ive_decided_i_want/ | {
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"You could probably get **to** the moon with a single Falcon 9 heavy. Cost is about 100 m... | [] | [] | [
[],
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[],
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"http://www.popularmechanics.com/science/space/rockets/just-one-150-million-seat-remains-on-space-adventures-lunar-flyby",
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],
[],
[
"http://www.space.com/12489-nasa-mars-life-private-spaceship-red-dragon.html",... | ||
142cpo | Why didn't Hitler let his generals do the commanding? | Ok, this wasn't such a good title but i couldn't think of any better way to describe it.
From what i've read, Hitler was usually very involved in the military - everything from commanding armies to "helping" design new weapons. Unfortunately we has pretty bad at it.
My question is, did Hitler not trust his generals/e... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/142cpo/why_didnt_hitler_let_his_generals_do_the/ | {
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"Another point would have to be that there was a large amount of squabbling, leaders of different group in Nazi Germany usually fought with each other on how to do certain things. Which Hitler knew very well of, if he left his generals to command ... | [] | [] | [
[]
] | |
ngsbd | the u.s. state department and what they do. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ngsbd/eli5_the_us_state_department_and_what_they_do/ | {
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"Wikipedia says it very clearly:\n\n > > The United States Department of State (often referred to as the State Department or DoS), is the United States federal executive departmen... | [] | [] | [
[],
[],
[],
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1ih4r9 | Why are Japanese castles built of wood as opposed to stone? | I am currently in Japan and have visited a number of castles and noticed that many are reconstructions due to the fact they burned down a number of times throughout history.
I wish to know why the Japanese haven't moved away from wooden castles when they are so susceptible to fire. I find it unlikely that they did n... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ih4r9/why_are_japanese_castles_built_of_wood_as_opposed/ | {
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"The huge stone bases are what make the castle the castle. That's t... | [] | [] | [
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"http://www.amazon.co.jp/%E5%BE%B9%E5%BA%95%E5%9B%B3%E8%A7%A3-%E6%88%A6%E5%9B%BD%E6%99%82%E4%BB%A3%E2%80%95%E4%B8%80%E6%97%8F%E3%81%AE%E5%AD%98%E4%BA%A1%E3%82%92%E8%B3%AD%E3%81%91%E3%80%81%E7%9B%AE%E6%8C%87%E3%81%99%E3%81%AF%E5%A4%A9%E4%B8%8B-%E6%A6%8E%E6%9C%AC-%E7%A7... | |
51h7rx | why does drinking after eating feel so satisfying? | Hello ELI5,
So, I don't know if it happens only to me or not, but I noticed that I feel really better while drinking something just after I ate something. Does some of you are feeling this too? And if so, do you know why?
Thanks! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/51h7rx/eli5_why_does_drinking_after_eating_feel_so/ | {
"a_id": [
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"text": [
"Liquids aid in digestion. That is the reason, and perhaps combined with other things like nutrient need and routine."
]
} | [] | [] | [
[]
] | |
1dgm2s | The Black Death: Was it actually beneficial to society in the long run? | I know that it killed millions of people at the time, but did it actually have any positive effects on our global society? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1dgm2s/the_black_death_was_it_actually_beneficial_to/ | {
"a_id": [
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"text": [
"This is the reply that you'd get from any book on the subject:\n\nThe church's power was weakened and in many places the social roles it had played were taken over by secular groups. \n\nEurope was overpopulated before the p... | [] | [] | [
[],
[]
] | |
7qw5lh | "It belongs in a museum!" is a well-known phrase from Indiana Jones. In reality, are museums the best places to keep artefacts of archaeological significance? How did public museums become the de facto place to store such artifacts? | I understand that this question may be interpreted in several ways but I'd like to hear your insights, no matter your train of thought!
[Source for the (paraphrased) quote.](_URL_0_) | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7qw5lh/it_belongs_in_a_museum_is_a_wellknown_phrase_from/ | {
"a_id": [
"dssv9zs",
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"text": [
"In regards to your first question, the reasons fall into two groups: for the good of the object, and to facilitate learning from that object.\n\n1) Museums are the best place for them for the same reason it's better to hire... | [] | [
"https://www.youtube.com/watch?v=yXyPvhISkRQ"
] | [
[
"https://www.connectingtocollections.org/"
],
[
"http://nmai.si.edu/explore/collections/repatriation/",
"https://en.wikipedia.org/wiki/Benin_Bronzes",
"http://www.dailymail.co.uk/news/article-2350933/Priceless-Qing-dynasty-bronzes-looted-Beijing-palace-153-years-ago-returned-China-family-Frenc... | |
a43gqp | how does teslas giant battery work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a43gqp/eli5_how_does_teslas_giant_battery_work/ | {
"a_id": [
"ebb7i3e"
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"text": [
"It's just a bunch of smaller cells. You know how a remote control seems to always take two AAs? It's like that but on a larger scale and with much more than 3 volts involved.\n\nThere's 3 ways to set up cells: series, parallel, and series-paralle... | [] | [] | [
[]
] | ||
5gcyj6 | Are there any primary source documents reporting "monster" sightings in North America during and/or before the American Revolution? | Secondary sources will work too if anybody's done research on this, but I'm primarily interested in things like journal entries by early explorers, colonists, or soldiers. I'm not out to prove or disprove anything, I just think this would be fun to read about. Thanks Reddit! | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5gcyj6/are_there_any_primary_source_documents_reporting/ | {
"a_id": [
"darozb2"
],
"score": [
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],
"text": [
"/u/mikedash answered pretty much this exact question [here](_URL_0_)"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/571gl1/where_there_ever_sightings_or_legends_of/d8q1h50/"
]
] | |
63np43 | how do people get good at flying in wingsuits? where/how do they practice? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/63np43/eli5how_do_people_get_good_at_flying_in_wingsuits/ | {
"a_id": [
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"text": [
"Most people get lessons from instructions. \n\nPlaces you can get instructions for this is called a Drop Zone. But to learn wingsuiting, you must first learn the basics of skydiving, and most places require you to have some ... | [] | [] | [
[],
[]
] | ||
13hrdu | If you point two flashlights in opposite directions, what would be the relative velocity of one beam of light relative to the other? | askscience | http://www.reddit.com/r/askscience/comments/13hrdu/if_you_point_two_flashlights_in_opposite/ | {
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"The general idea is that lengths contract and time dilates in such a way that the speed of light is the same in all inertial reference frames. This means that speeds don't simply add in the way we norm... | [] | [] | [
[],
[],
[]
] | ||
z7cvt | Due to the constant barrage of unfiltered solar energy, would any layer of the Moon's soil be warm? | I get the surface would probably never be able to retain any heat because there's no atmosphere to contain the heat around it... But would any layers deeper provide enough insulation to hold some warmth?
And, by warmth, I mean any temperature higher than the average surface temperature of the moon. | askscience | http://www.reddit.com/r/askscience/comments/z7cvt/due_to_the_constant_barrage_of_unfiltered_solar/ | {
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"text": [
"Space is cold but really bad at absorbing heat, so the surface of the moon is surprisingly warm. The mean surface temperature is -23 Celsius (at least according to [this](_URL_0_)).",
"Yes, some parts of Luna are signifi... | [] | [] | [
[
"http://www.asi.org/adb/02/05/01/surface-temperature.html"
],
[
"http://www.asi.org/adb/02/05/01/surface-temperature.html"
]
] | |
4u5j6o | why does everyone blame the united states for the current state of the world? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4u5j6o/eli5_why_does_everyone_blame_the_united_states/ | {
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"text": [
"Because the US did a bunch of crazy shitty things in other countries. I.e. permitting drug to be brought into the US during the 80's \"war on drugs\", infecting thousands of people in south america with... | [] | [] | [
[],
[],
[]
] | ||
10dvg4 | why do americans consider nationalism/patriotism to be such a positive trait? | I'm from Belgium, which doesn't have much that resembles national pride, so I'd just like to know why Americans would consider this to be such a good thing. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/10dvg4/eli5_why_do_americans_consider/ | {
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"As a non-American I believe it's to do with t... | [] | [] | [
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1gvca8 | What was the general feeling of the American people in relation to the Pentagon Papers? Was the feeling similar to the current Snowden/NSA leaks? | Yes. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1gvca8/what_was_the_general_feeling_of_the_american/ | {
"a_id": [
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"text": [
"I think they were (it will just be easier to compare if I refer to Snowden in past tense) similar in that there seemed to be across-the-board resentment because the people standing in support of the leaker and in opposition... | [] | [] | [
[
"http://politicalticker.blogs.cnn.com/2013/06/17/cnn-poll-majority-give-snowden-thumbs-down/"
],
[]
] | |
22tey0 | how can some terminally ill people just "hold off" death until they're ready? | Recently a family friend's mother died. She had some kind of terminal illness, but they all decided to go on a vacation to the Bahamas towards the end. She managed to keep going through the whole vacation, then "let go" and died a few days after they got back. There are many stories like this, where someone holds on fo... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22tey0/eli5_how_can_some_terminally_ill_people_just_hold/ | {
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"score": [
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2,
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"text": [
"Luck? Coincidence? Fate? Whatever you're comfortable with believing, I guess.",
"pos... | [] | [] | [
[],
[],
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2wp4go | To what degree did American racism and Jim Crow affect allies' impressions of the United States before the Civil Rights Movement? | I know that the USSR's constant highlighting of American institutional racism towards the Third World played a big role in the change of federal policy towards white subjugation of blacks in the South, but what was the popular conception of the United States like in relation to its racial climate in nations like Canada... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2wp4go/to_what_degree_did_american_racism_and_jim_crow/ | {
"a_id": [
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"score": [
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"text": [
"An interesting question, but I would perhaps suggest you put this in the [Black History AMA going on right now!](_URL_0_)"
]
} | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/2wnuc4/black_history_month_ama_panel/"
]
] | |
4byb05 | why do rovers always have six wheels? | Every time I see a picture of a rover designed for or on mars, it has six wheels. I know one might break, but since everyone goes for six, is there something I'm missing? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4byb05/eli5_why_do_rovers_always_have_six_wheels/ | {
"a_id": [
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"text": [
"Six movable wheels with individual motors give a better balance to the vehicle and make it easier to cross all types of terrain.",
"It's a rocker-bogie differential configuration, designed to maximize the ruggedness of ... | [] | [] | [
[],
[
"http://www.alicesastroinfo.com/2012/07/mars-rover-rocker-bogie-differential/"
]
] | |
2f2vw0 | Is the skin under your foot naturally tougher than that of your body? Or is it toughened by walking? | I did Google this, but couldn't find a relevant search result.
Basically, are you born with feet that have naturally tougher skin, or does that tough skin (The soles) come from conditioning your foot through walking?
If I were to have never walked since birth, would the soles of my feet still have a tougher, thicke... | askscience | http://www.reddit.com/r/askscience/comments/2f2vw0/is_the_skin_under_your_foot_naturally_tougher/ | {
"a_id": [
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130,
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"text": [
"Yes. There is an extra layer of skin on the soles of your feet and the palms of your hands. Doing actions such as walking every day also makes the skin there a bit tougher. So it's a bit of both, ... | [] | [] | [
[],
[],
[]
] | |
e28e8x | Is there any evidence that Native Americans who came in contact with Europeans tried to inform or alert other tribes? | This question came up at dinner tonight, and I am a little stumped. I know the record of the native's response to the European arrival is likely sparse due to tribal devastation, but I would be happy for any information you could provide. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/e28e8x/is_there_any_evidence_that_native_americans_who/ | {
"a_id": [
"f8ugkv1"
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"score": [
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"text": [
"It is important to remember that the response to European arrival varied by location and culture. In the Southeast we see Spaniards arriving to mixed reactions, but they all really fit into the existing interactions between people living in thes... | [] | [] | [
[]
] | |
4wnvrx | why do sailors need to know knots? | It seems like they could easily use clamps or some other fastening device to secure sails or cargo. Even in modern sailing, knots are still used when a clamp could do the same job much more efficiently. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4wnvrx/eli5_why_do_sailors_need_to_know_knots/ | {
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"text": [
"Why would a clamp be more efficient? It's like this whole other thing you have to bring along just so you don'... | [] | [] | [
[],
[],
[],
[],
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[]
] | |
7xvxgm | In Auschwitz, did they randomly execute them, or did they meticulously execute them based on their tattooed identification number? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7xvxgm/in_auschwitz_did_they_randomly_execute_them_or/ | {
"a_id": [
"dubmcs5"
],
"score": [
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"text": [
"There seems to be a misconception here. Auschwitz was a combination death camp and work camp. This meant that in addition to having gas chambers and crematoria for mass executions, it also kept a large body of prisoners for slave labor to work in... | [] | [] | [
[
"http://auschwitz.org/en/museum/auschwitz-prisoners/prisoner-numbers",
"http://auschwitz.org/en/history/auschwitz-iii/ig-farben",
"http://www.auschwitz.org/en/history/auschwitz-and-shoah/the-unloading-ramps-and-selections"
]
] | ||
6sq54s | what are nanobots? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6sq54s/eli5_what_are_nanobots/ | {
"a_id": [
"dlet2w3"
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"text": [
"Nanobots are tiny robots. Robots so small that they could do things microbes do. There are many things we could use tiny robots for: one famous idea is making tiny surgery robots that could swim like submarines inside your blood vessels so that ... | [] | [] | [
[]
] | ||
29a61p | if i heat a half pint of water for one minute in the microwave, does it heat up by exactly twice as many degrees as if i heat a whole pint for a minute? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/29a61p/eli5_if_i_heat_a_half_pint_of_water_for_one/ | {
"a_id": [
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"text": [
"Simply: Exactly twice as much, no. About twice as much, yes. \r\r\rMore in depth: Your microwave is around 1000 Watts, or 1000 Joules of energy per second. Assuming 80% of this hits the water, the water is getting 800 W. If your short time is 30 ... | [] | [] | [
[]
] | ||
o1w1d | why people can't just follow the story line of the book when making a film adaptation. | Why do movie writers and directors have to change details, plot, and occurrences when making a movie that is supposed to be an adaptation about a book? Why is it so hard to stick to the freakin' book?
**EDIT** Okay. Maybe the better question is "How does accuracy translate into a less interesting movie, if the boo... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/o1w1d/eli5_why_people_cant_just_follow_the_story_line/ | {
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"text": [
"1. thats the directors/writers interpretation of the book.\n2. They have to cut a lot of stuff out so it can fit in a 120 minute movie\n3. time/budget restrai... | [] | [] | [
[],
[],
[],
[],
[
"http://www.blakesnyder.com/2010/02/09/stc-beats-out-500-days-of-summer/*",
"http://www.savethecat.com"
]
] | |
1x6dgz | In Shakespearian times, the theatre was considered a vile, hellish form of entertainment. How was it accepted that the upper crust of society regularly visited the outside of walled London, and the Globe Theatre? | I recently visited the Globe, and we discussed how the unwashed masses would be the groundlings, and the richer you were the higher you sat in the audience. How was it that these upper-class people, particularly royals, were openly attending something so against the Protestant leadership? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1x6dgz/in_shakespearian_times_the_theatre_was_considered/ | {
"a_id": [
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"text": [
"While the opinion that the theater was a sinful place, and a generally uncomfortable attitude toward theater practice in general, was certainly around during the years the Globe was in operation, it was by no means a dominan... | [] | [] | [
[],
[]
] | |
2oi2kc | why is public education acceptable but public healthcare a big no-no in the us? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2oi2kc/eli5_why_is_public_education_acceptable_but/ | {
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"text": [
"People who oppose socialized healthcare generally worry that their taxes will go up (almost certainly true) or that their quality and/or timeliness of their own healthcare will go ... | [] | [] | [
[],
[],
[
"http://www.schoolsmatter.info/2013/12/walmarts-walton-foundation-doubling.html"
],
[]
] | ||
5b9hns | how does a computer scale images to different aspect ratios? | Does it fill in pixels of the same colour when you extend the length of an image? If so, how does it know where to fill in the pixels, so that it doesn't make the image too abnormal. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5b9hns/eli5_how_does_a_computer_scale_images_to/ | {
"a_id": [
"d9mr45v"
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"score": [
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"text": [
"There are two types of images, raster graphics and vector graphics. \n\nVector graphics rely on mathematically produced 'paths' to draw the image. When rescaling the image, the computer simply recalculates the path and there is no quality loss.... | [] | [] | [
[]
] | |
aqfmcd | Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2? | askscience | https://www.reddit.com/r/askscience/comments/aqfmcd/why_is_it_not_e12m_c2_like_ke12m_v2_did_einstein/ | {
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112,
28,
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24
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"text": [
"Nah, Einstein didn't leave off the 1/2 and his equation actually includes it but in a subtle manner. Including object momentum, the full energy equati... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
1jq55j | what is the difference between ska, rocksteady, and reggae? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jq55j/eli5what_is_the_difference_between_ska_rocksteady/ | {
"a_id": [
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"text": [
"Reggae is the evolved form of ska and rocksteady. It's also used as a blanket term to describe all carribean (especially Jamaican) music. \n\nSka and rocksteady are big on live instruments, and there's an emphasis on horns i... | [] | [] | [
[],
[
"www.youtube.com/watch?v=2x8jUJcR7do",
"http://en.wikipedia.org/wiki/Big_band",
"www.youtube.com/watch?v=21PUe4OLuQI",
"www.youtube.com/watch?v=rHRQ7-GWvIE",
"www.youtube.com/watch?v=eugQ3vfQOK8",
"http://en.wikipedia.org/wiki/Deejay_%28Jamaican%29",
"www.youtube.com/watch?v=ybmP... | ||
a70ht6 | What were early Jewish views of Jesus and Christianity? | We can infer from parts of the New Testament that there was a debate among Jews in the first and second centuries about whether Jesus was the messiah or not. What do non-biblical Jewish sources say about how Jews who didn't think Jesus was the messiah responded to Jesus and early Christianity? Was there some kind count... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a70ht6/what_were_early_jewish_views_of_jesus_and/ | {
"a_id": [
"ebzup2n"
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"score": [
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"text": [
" > We can infer from parts of the New Testament that there was a debate among Jews in the first and second centuries about whether Jesus was the messiah or not\n\nCritically, while you can infer that amongst a select number of Jews there may hav... | [] | [] | [
[
"http://vlib.iue.it/carrie/texts/carrie_books/seaver/text.html"
]
] | |
5h7fn7 | Why did Spain make peace with France in 1795? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5h7fn7/why_did_spain_make_peace_with_france_in_1795/ | {
"a_id": [
"day0fs4"
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"text": [
"The simple answer is about what you'd expect--a relatively uncontested French advance by the army of the Pyrenees into the heart of Spain in 1795 forced the Spanish crown to sue for peace (with minor territorial concessions in the Caribbean but ... | [] | [] | [
[]
] | ||
2hczk6 | If they can make rooms with simulated zero-gravity, could they make a room with more intense gravity as well? | askscience | http://www.reddit.com/r/askscience/comments/2hczk6/if_they_can_make_rooms_with_simulated_zerogravity/ | {
"a_id": [
"ckrk62e",
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3
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"text": [
"If you throw an object in a gravitational field, it will follow a parabola: up fast, slowing down, levelling out, accelerating downwards, down fast. If the object is a container of some sort, then anything inside will follow... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Equivalence_principle"
]
] | ||
pa64j | What percentage of human zygotes abort spontaneously before birth? | That is, what percentage of zygotes terminate naturally at any point between conception and birth? I've read that this statistic is extremely high—[more than two thirds](_URL_0_), in fact. But I'm not sure if this is accurate, because the statistics seem to vary quite a bit. I've also read that because of how difficult... | askscience | http://www.reddit.com/r/askscience/comments/pa64j/what_percentage_of_human_zygotes_abort/ | {
"a_id": [
"c3nqkn5",
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"text": [
"_URL_0_\n\n\"It is estimated that up to **half of all fertilized eggs die and are lost (aborted) spontaneously**, usually before the woman knows she is pregnant. Among those women who know they are pregnant, the miscarriage ... | [] | [
"http://books.google.com/books?id=tBQgMTqIseQC&pg=PA124&dq=%22a+third+of+all+conceptions%22&hl=en&sa=X&ei=5gAiT6zYD8qhiALT1YzcBw&ved=0CGMQ6AEwCQ#v=onepage&q=%22a%20third%20of%20all%20conceptions%22&f=false"
] | [
[
"http://www.nlm.nih.gov/medlineplus/ency/article/001488.htm"
],
[
"http://www.ncbi.nlm.nih.gov/pubmed?term=12620443",
"http://www.ncbi.nlm.nih.gov/pubmed?term=3393170",
"http://www.ncbi.nlm.nih.gov/pubmed?term=11023804"
]
] | |
cvh2pg | biologically speaking, how exactly does an orgasm become bigger/harder? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cvh2pg/eli5_biologically_speaking_how_exactly_does_an/ | {
"a_id": [
"ey4tlsb"
],
"score": [
2
],
"text": [
"One factor is availability of oxygen; the less in your system, the more intense the sensation. Hence autoerotic asphyxiation."
]
} | [] | [] | [
[]
] | ||
3karbx | why do we say every year before 2000 in the hundreds, and every year after in the thousands? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3karbx/eli5_why_do_we_say_every_year_before_2000_in_the/ | {
"a_id": [
"cuw1oem",
"cuw1q3n",
"cuw1yxj"
],
"score": [
37,
2,
7
],
"text": [
"Because \"18 hundred\" is shorter than \"1 thousand 8 hundred\". On the other hand, \"20 hundred\" is longer than \"2 thousand\". After 100 years however, you will hear people say \"21 hundred\" instea... | [] | [] | [
[],
[],
[]
] | |
409c54 | how does the nlf tournament works? | How are the teams divided, why are they divided if they play teams from both conferences anyway, what are the wild cards. How many teams there are. How many go to play offs and finally how does a team qualify to play offs. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/409c54/eli5how_does_the_nlf_tournament_works/ | {
"a_id": [
"cysggw1",
"cysgj9q"
],
"score": [
2,
5
],
"text": [
"NFL? So the NFL is split into the NFC and the AFC. They both have 16 teams of their own. Each of these conferences are split into 4 groups of 4 called divisions. So there are 4 divisions per conference: North, South, East an... | [] | [] | [
[
"http://www.nfl.com/standings/tiebreakingprocedures"
],
[]
] | |
30lnrw | Are there any micro organisms (viruses or bacteria) that are harmful to both plants and animals, or are they too dissimilar at that level? | askscience | http://www.reddit.com/r/askscience/comments/30lnrw/are_there_any_micro_organisms_viruses_or_bacteria/ | {
"a_id": [
"cptxgv4"
],
"score": [
4
],
"text": [
"There are indeed organisms that are pathogenic to both plants and humans. The most predominant and clinically significant pathogens that jump between kingdoms are among the bacteria. In bacteria, many of the proteins required for pathogenesis in ... | [] | [] | [
[
"http://femsle.oxfordjournals.org/content/343/1/1.abstract",
"http://blogs.scientificamerican.com/artful-amoeba/2014/01/31/suspicious-virus-makes-rare-cross-kingdom-leap-from-plants-to-honeybees/",
"http://www.popsci.com/science/article/2010-04/scientists-discover-first-virus-make-jump-plants-humans",... | ||
3bi365 | the financial crisis in greece | All questions relating to Greece and its financial situation is to be posted here.
| explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3bi365/the_financial_crisis_in_greece/ | {
"a_id": [
"csmat0j",
"csmawol",
"csmazv4",
"csmbgdl",
"csmbpba",
"csmby7z",
"csmbywa",
"csmckim",
"csmcrl0",
"csmd60h",
"csmdi9v",
"csmdqef",
"csme3zq",
"csmebne",
"csmeix1",
"csmejr2",
"csmetgm",
"csmetu3",
"csmevc9",
"csmeykl",
"c... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"http://www.businessinsider.com/the-secret-goldman-sachs-greece-deal-thats-described-as-a-very-sexy-story-between-two-sinners-2012-3?IR=T",
"http://www.spiegel.de/international/europe/greek-debt-crisis-how-goldman-sachs-helped-greece-to-mask-its-... | |
bivoah | why ripe fruits taste better even though they aren’t getting more stuff from the plant | When bananas ripen they turn brown and aren’t attached to the tree anymore so why do they taste sweeter? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bivoah/eli5_why_ripe_fruits_taste_better_even_though/ | {
"a_id": [
"em3evz3",
"em3f8wu"
],
"score": [
13,
2
],
"text": [
"There are actually two types of fruit, **climacteric** **fruit** and **nonclimacteric fruit**. **Nonclimacteric** **fruit** will not ripen off of the tree at all— they depend on their connection to their tree to build up s... | [] | [] | [
[],
[]
] | |
emoacm | how are certain plants "indoor plants"? don't all plants need sunlight to survive? | in some cases, certain planted pots are advertised as needing none to very little sunlight and just water to grow/survive. How is this possible? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/emoacm/eli5_how_are_certain_plants_indoor_plants_dont/ | {
"a_id": [
"fdpzagz",
"fdpzroe"
],
"score": [
2,
22
],
"text": [
"Well, sunlight is just a more expansive mix of different wavelengths of light. Certain plants can tolerate a more limited spectrum of light. Furthermore, you can buy lights that have a larger spectrum than normal light bulb... | [] | [] | [
[],
[]
] |
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