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 |
|---|---|---|---|---|---|---|---|---|---|
8mepxo | why does root beer foam so much when poured onto ice cream? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8mepxo/elif_why_does_root_beer_foam_so_much_when_poured/ | {
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"It's a combination of two major factors:\n\n- Ice cream has a lot of surface area, which means more nucleation points. More nucleation points mean more bubbles.\n\n- Milk and cr... | [] | [] | [
[],
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34jxlv | how do bullets get loaded in the gun from the magazine? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/34jxlv/eli5_how_do_bullets_get_loaded_in_the_gun_from/ | {
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"As the bolt travels forward it catches the top of the back of the bullet, pushes it forward and onto a ramp and into the chamber.\n\n_URL_0_",
"There is a spring at the bottom of the magazine. As th... | [] | [] | [
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"http://cdn.thewire.com/img/upload/2013/01/08/bushmaster.gif"
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"http://www.gunlink.info/images/1911_cycle.gif"
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9nttoh | Earth is made up of tectonic plates, will the number of these plates ever change over time? | Earth conists of a number of tectonic plates that, as far as I know, seem rather stable. However, will some plates subdivide into new plates over time? Will current plates combine into larger "superplates"? Or is Earth just not geologically active enough for the tectonic plates of Earth to change?
On a slightly relate... | askscience | https://www.reddit.com/r/askscience/comments/9nttoh/earth_is_made_up_of_tectonic_plates_will_the/ | {
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"text": [
"Neither the number of plates or the geometry (i.e. their sizes/shapes) of plates are fixed. It's first worth noting that even the current number of plates is somewhat contentious and depends on how the criteria / data used to define them (e.g. [... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Indian_Plate",
"https://www.geosociety.org/gsatoday/science/G358A/GSATG358A.pdf",
"https://en.wikipedia.org/wiki/Somali_Plate",
"https://en.wikipedia.org/wiki/Rift",
"https://en.wikipedia.org/wiki/Suture_(geology\\)",
"https://earth-planets-space.springeropen... | |
loyt9 | How does the population of wasps survive year on year if they all seemingly die off in the winter? | I know the whole species obviously doesn't completely die but where do they go? Do they hibernate? Or do only a few survive to re-populate next summer? | askscience | http://www.reddit.com/r/askscience/comments/loyt9/how_does_the_population_of_wasps_survive_year_on/ | {
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"text": [
"In many wasp families such as Polistidae and Vespidae, only a fertilized reproductive female (i.e. gyne) overwinters and subsequently starts a colony in the spring.",
"Many i... | [] | [] | [
[],
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"http://en.wikipedia.org/wiki/Diapause"
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"http://en.wikipedia.org/wiki/Diapause"
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fpfnrh | how do n95 masks reduce lung capacity? | I've read in a few places that prolonged use of these filters can cause diminished lung capacity. Wtf is it doing to your lungs other than blocking particulate matter? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fpfnrh/eli5_how_do_n95_masks_reduce_lung_capacity/ | {
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"Your lungs have to work harder, to force the air through the filter membrane. Working harder can have side effects, but you can accommodate to it (like living at a higher altitude... | [] | [] | [
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] | |
1o9m2p | the ssl handshake protocol. | I understand that at some point public keys are exchanged and all communications are from that point encrypted. But if there was a "man in the middle" listening the entire time, couldn't he/she/it simply also decrypt on the fly? How can SSL actually be secure? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1o9m2p/eli5the_ssl_handshake_protocol/ | {
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"text": [
"There are common secure key exchange protocols. An example is [Diffie-Hellman](_URL_0_). That page has a great ELI5 example that I'll narrate:\n\nSuppose 2 friends, Alice & Bob want to paint their awesome super-secret clubhouses the same colo... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Diffie-hellman",
"http://en.wikipedia.org/wiki/Discrete_logarithm_problem"
]
] | |
39y5jl | if you are flying in an airplane and it is storming, can you get struck by lightning if you are flying above the clouds? | I had a flight about a week ago and it got delayed for a bit because of thunderstorms in the area. I am a frequent flyer and know that the majority of the flight is spend above the clouds, so it made me wonder... If you are flying above the clouds in an airplane can you still get struck by lightning? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/39y5jl/eli5_if_you_are_flying_in_an_airplane_and_it_is/ | {
"a_id": [
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"text": [
"Lighting hits planes all the time as most of the time it just passes thru the plane\nbut some times it can make the plane explode.\n[the plane explode ](_URL_0_)"
]
} | [] | [] | [
[
"https://en.wikipedia.org/wiki/Pan_Am_Flight_214"
]
] | |
1035gr | Which aspect of religion came first, deities or laws/ethics? | I've noticed two common aspects that pretty much all religions share. 1) The rules and laws that practitioners must/should obey and 2) reasons as to why those rules and laws must/should be followed. Generally that second part is based on some kind of divine guidance or being. E.g. Moses received 10 commandments from Go... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1035gr/which_aspect_of_religion_came_first_deities_or/ | {
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"text": [
"I'm not entirely sure what you're asking, here. If it doesn't have a deity or supernatural power of some sort, it's not really a religion. But it's no secret that the morals and laws of religions are essentially the morals a... | [] | [] | [
[],
[]
] | |
28lp09 | Has the gravitational constant ever been measured somewhere apart from the surface of the earth? | All I could find was the [SEE project](_URL_0_), but I can't find any information on whether they actually have gone through with it. Thought it would be interesting to compare results with the elusive measurements taken on earth. | askscience | http://www.reddit.com/r/askscience/comments/28lp09/has_the_gravitational_constant_ever_been_measured/ | {
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"We can measure it in space. The expansion of the Universe, for example, depends on the value of the gravitational constant. We can constrain deviations from the terrestrial value by looking at [supern... | [] | [
"http://iopscience.iop.org/0957-0233/10/6/317?rel=ref&relno=2"
] | [
[
"http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9198037&fulltextType=RA&fileId=S1323358014000095",
"http://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis"
],
[
"http://arxiv.org/pdf/0801.2589.pdf",
"http://arxiv.org/pdf/astro-ph/9509090.pdf"
],
[
"... | |
3f8tg6 | What happens when a black hole is given charge? | **Disclaimer:** I have zero knowledge of the physics involved at these extremes, so I might say something completely stupid.
Since gravity is weaker than electromagnetism, if a black hole is consistently fed particles of a certain charge (hypothetically, say a device capable of shooting electrons into the black hole ... | askscience | http://www.reddit.com/r/askscience/comments/3f8tg6/what_happens_when_a_black_hole_is_given_charge/ | {
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"text": [
"You are correct that there would be multiple boundaries, but the probe wouldn't escape the outer event horizon.\n\nThere are [two horizons](_URL_0_), meaning there is basically a black hole inside a black hole.",
"A char... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Reissner%E2%80%93Nordstr%C3%B6m_metric#Charged_Blackholes"
],
[
"http://preposterousuniverse.com/grnotes/grnotes-seven.pdf",
"http://casa.colorado.edu/~ajsh/rn.html"
]
] | |
8shu0w | these child internment camps. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8shu0w/eli5_these_child_internment_camps/ | {
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"text": [
"Crossing the border illegally is a crime.\n\nDuring processing before deportation, the illegal migrant is held in jail so they don't vanish into the US.\n\nWe don't send kids to jail with their parents, but we have to put them *somewhere*.\n\nThi... | [] | [] | [
[]
] | ||
4ufuww | how does "duty free" work? why do they have it? who is it helping to have overpriced bulky gifts at the airport? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ufuww/eli5_how_does_duty_free_work_why_do_they_have_it/ | {
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"text": [
"Duty free goods allow a person exiting a country to buy certain goods tax (aka \"duty\") free, as long as they are not going to use the products in that country and are confirmed to be leaving.\n\nIn many countries taxes on ... | [] | [] | [
[],
[]
] | ||
3ppa31 | Why did Saudi Arabia refuse to accept Osama bin Laden's offer to use his troops during the Iraqi invasion of Kuwait? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3ppa31/why_did_saudi_arabia_refuse_to_accept_osama_bin/ | {
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"text": [
"The Saudis rejected bin Laden's offer largely because it was arrogant and incredibly naïve of him to believe that the *mujahideen*, whose experience in Afghanistan was waging asymmetric warfare in a geographical setting perfectly suited to those ... | [] | [] | [
[
"https://books.google.co.uk/books?id=nk2w0ifbi_cC",
"https://books.google.co.uk/books?id=Q1fCBAAAQBAJ",
"https://books.google.co.uk/books?id=Oe2vjwEACAAJ",
"https://books.google.co.uk/books?id=kYdLqOUj8lUC"
]
] | ||
19j3sf | How similar were ancient libraries to modern public or academic libraries? | Could you check out books for two weeks? Did they have late penalties? Did librarians tell you to be quiet if you made noise? Was public access restricted?
I don't have any specific time periods or even libraries in mind. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/19j3sf/how_similar_were_ancient_libraries_to_modern/ | {
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"The first thing that comes to mind when you're talking about ancient libraries, is the Library of Alexandria in Egypt ~3rd Century BC, when Callimachus created the first bibliography of it, it was 120 volumes of a 200,000 + volume collection, com... | [] | [] | [
[
"http://www.youtube.com/watch?v=jixnM7S9tLw",
"http://www.youtube.com/watch?v=83HQ5scPB98"
]
] | |
2cd889 | why are the demonyms for countries like america, canada, and china (american, canadian, and chinese) different even though they all end with a? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2cd889/eli5_why_are_the_demonyms_for_countries_like/ | {
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"text": [
"Why isn't a Canadian from Canadia?",
"Because the demonym for a country isn't determined by which letter it ends with. More often than not it's just a matter of which suffix so... | [] | [] | [
[],
[],
[],
[]
] | ||
8yccdw | if blood is a biohazard, why are feminine hygiene products not thrown away in a more careful way? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8yccdw/eli5_if_blood_is_a_biohazard_why_are_feminine/ | {
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... | [] | [] | [
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"https://www.initial.com.au/sanitary-units/"
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"http://www.envcap.org/r... | ||
4ig7qu | Why did Germany not finish Britain off during WW2? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4ig7qu/why_did_germany_not_finish_britain_off_during_ww2/ | {
"a_id": [
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"text": [
"I think this thread got pretty comprehensive replies:\n_URL_0_"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/4dzlw1/why_didnt_hitler_just_launch_operation_sealion/"
]
] | |
1viyub | how do scene and torrent groups remove tv show drm?? | So i've been seeing all these torrents that obviously originate from the scene, and they are from HBO. Doesn't HBO flag all recordings as copy once so that you can't edit them and re encode them? I've heard a few explanations but I don't really get them | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1viyub/eli5_how_do_scene_and_torrent_groups_remove_tv/ | {
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"That kind of flag just send a signal to a device not to allow copying, and relies on circumventing it being illegal under the DMCA. It is kind of like the lock on most homes...pretty easy to overcome, so the deterrent is more about having to com... | [] | [] | [
[]
] | |
8wundx | why do airlines force people to keep their seat belts on for so long when people in private planes can lay down, sleep, party, etc.? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8wundx/eli5_why_do_airlines_force_people_to_keep_their/ | {
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"e... | [] | [] | [
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... | ||
5s1ic5 | Before machinery, how would people make straight edges and find right angles? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5s1ic5/before_machinery_how_would_people_make_straight/ | {
"a_id": [
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"For making an edge straight, you can stretch a thread with a bow- like the bow of a bow and arrow. If you put ink on it and snap it against a piece of wood, it will mark a straight line ( and carpenters' chalk lines still work on this principle)... | [] | [] | [
[]
] | ||
6cyksl | My History teacher once told me that the Soviets (during world war two) had so many men but so few guns that many had to run into battle unarmed and pick up dead men's weapons, how true is this? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6cyksl/my_history_teacher_once_told_me_that_the_soviets/ | {
"a_id": [
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"text": [
"This question come up all the time. u/Searocksandtrees gave a good summary of some of the responses in [this post](_URL_0_). \n\nIt's definitely not \"pretty spot on\"."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/645f6i/how_accurate_is_the_opening_scene_in_enemy_at_the/dfzl3de"
]
] | ||
7u234k | does eating spicy food destroy beneficial bacteria in your colon? | I read on a previous ELI5 post that spicy food kills bacteria. Does this mean people who eat lots of spicy food have less beneficial bacteria in their digestive tract? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7u234k/eli5_does_eating_spicy_food_destroy_beneficial/ | {
"a_id": [
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"I am not an expert by any means, but [this article](_URL_0_) suggests that capsaicin, the active ingredient in spicy food, actually has a beneficial effect on your gut flora. Giving mice capsaicin increased the number of good gut bacteria and red... | [] | [] | [
[
"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5442453/"
]
] | |
ae3ow1 | I just found out wild hamsters are rare. What's the story on how we tamed them? | askscience | https://www.reddit.com/r/askscience/comments/ae3ow1/i_just_found_out_wild_hamsters_are_rare_whats_the/ | {
"a_id": [
"edmi4kf"
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],
"text": [
"The link describes but I'll summarize\n\n_URL_0_\n\nSpecifically, it's _Syrian_ hamsters that are rare in the wild, there are other species. But Syrian hamsters are the most commonly kept as pets.\n\nSo in 1930, a scientist went to catch some S... | [] | [] | [
[
"https://news.nationalgeographic.com/news/2014/03/hamsters-syria-aleppo-pets-animals/"
]
] | ||
55fdhw | why was america online (aol) unable to become a popular internet service provider after the dial-up days ended? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/55fdhw/eli5_why_was_america_online_aol_unable_to_become/ | {
"a_id": [
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"text": [
"What replaced dial-up was faster connections directly to your home. Companies that already owned the connection to your home - the phone company and the cable company - were the only ones in a position to exploit those and offer broadband. That's... | [] | [] | [
[]
] | ||
buk2yo | why do some gasses have an odour while others are odourless? | Why is it you can smell sulphur but you can’t smell nitrogen or oxygen?
And why does the air around some hot appliances have a distinctive odour. I can smell that my clothes iron is hot. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/buk2yo/eli5_why_do_some_gasses_have_an_odour_while/ | {
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2,
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"text": [
"I believe it’s because some interact with chemical receptors in our noses while others don’t.",
"Nature has sculpted all living th... | [] | [] | [
[],
[],
[],
[],
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[]
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1pb7o0 | AMA - Byzantine Empire | Welcome to this AMA which today features three panelists willing and eager to answer all your questions on the Byzantine Empire.
Our panelists introduce themselves to you:
* /u/Ambarenya: I have read extensively on the era of the late Macedonian emperors and the Komnenoi, Byzantine military technology, Byzantium and ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1pb7o0/ama_byzantine_empire/ | {
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336y43 | when i am really angry, why does throwing something make me feel better? | For example - one time I was having problems with a desktop keyboard. I finally got so frustrated I just smashed my fist into it, which made me feel better. On other occasions (rare - it's not a pervasive problem) throwing things has had the same effect.
I'm an electrical engineer - I know that (at least in this case... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/336y43/eli5_when_i_am_really_angry_why_does_throwing/ | {
"a_id": [
"cqi47cn",
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"score": [
2,
2
],
"text": [
"I would say that it's the release of energy that eases you. I actually do a set or two of push ups when I'm mad. I put that energy towards something productive instead. ",
"Bioenergetics\n\nI would say it is because of m... | [] | [] | [
[],
[
"https://youtu.be/_0Oj8oW6OGc"
]
] | |
3hhqxu | It's WWII in Germany and i live in Munich. I'm not a member of the Nazi party, I'm not Jewish. I'm a normal german citizen working for a family business. How is my life different than before the war? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3hhqxu/its_wwii_in_germany_and_i_live_in_munich_im_not_a/ | {
"a_id": [
"cu84ozi",
"cu84ro2"
],
"score": [
55,
22
],
"text": [
"Are we talking 1940 or 1944? The answers are going to be completely different depending on whether Germany was winning or losing at the time.",
"What would your age and gender be? Is your family business somehow import... | [] | [] | [
[],
[]
] | ||
3yoa10 | how does the rest of the world find out so much about north korea when they're so isolated. | Like the second most powerful man there going to work in the mines. Do they just put out news somewhere and somehow we find out about it? Why would they even broadcast that? Is there some deal that they have to abide by as far as information sharing...? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3yoa10/eli5_how_does_the_rest_of_the_world_find_out_so/ | {
"a_id": [
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"text": [
"There's a few ways actually: \n\n* Official NK news sources. Many of these such as Rodun Simuun (sp?) and the like can be accessed from outside the DPRK. Whilst /r/Pyongyang has become something of a Reddit joke, if you loo... | [] | [] | [
[],
[]
] | |
49p984 | How honest were WW2 tank crews with the number of Kill rings on the barrel? | Was it common for them to exaggerate the number of kills? By how much? I'd be interested in hearing about AA/AT crews as well. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/49p984/how_honest_were_ww2_tank_crews_with_the_number_of/ | {
"a_id": [
"d0to57n"
],
"score": [
2
],
"text": [
"I wouldn't call it so much dishonest as I would ill-informed. Modern combat the likes of which we saw in WW2 was often hectic enough that it was difficult to confirm kills - if 4 Shermans shot at a Panzer IV and then the crew was seen to bail out... | [] | [] | [
[]
] | |
1fuxq7 | How does my brain know where my hands are in 3D space? | I was think about this in the shower, with my eyes closed I knew where my hands were. I could touch exactly where I intended without any visual input. | askscience | http://www.reddit.com/r/askscience/comments/1fuxq7/how_does_my_brain_know_where_my_hands_are_in_3d/ | {
"a_id": [
"cae74ek",
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],
"score": [
8,
3
],
"text": [
"Humans have more than the 5 \"classic\" senses. One sense we have that people seem to overlook is [proprioception](_URL_0_). There are specialized stretch receptors in muscles and ligaments that allow your brain to figure ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Proprioception"
],
[
"http://en.wikipedia.org/wiki/Proprioception",
"http://www.sciencedaily.com/releases/2010/07/100715123406.htm"
]
] | |
11sfyf | why do you get that awful feeling in your stomach when you hear bad news or feel betrayed or jealous? | Google failed to provide reliable answers. Sorry if someone's already asked. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/11sfyf/eli5_why_do_you_get_that_awful_feeling_in_your/ | {
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"score": [
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"text": [
"Your intestines are lined with nerves, to the point they're practically a second brain. Sometimes they react to feelings, like when you're having butterflies in your stomach.",
... | [] | [] | [
[],
[],
[],
[]
] | |
4vthdw | tpp, ttip, and tisa and what they're (doing) trying to do. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4vthdw/eli5_tpp_ttip_and_tisa_and_what_theyre_doing/ | {
"a_id": [
"d618dv0"
],
"score": [
2
],
"text": [
"All three are trade agreements between the U.S., Asian countries and the E.U. They are all designed to reduce trade barriers that exist between countries. Beyond that, things get very political, very fast. "
]
} | [] | [] | [
[]
] | ||
3pb6ed | what happens to a deceased person's phone number, bank account, etc? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3pb6ed/eli5_what_happens_to_a_deceased_persons_phone/ | {
"a_id": [
"cw4suwc"
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"score": [
2
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"text": [
"Usually they close the bank account and give the remaining balance to the beneficiary labeled on the account. A phone number is taken out of circulation for a certain period and then given back to the system as a new.number. "
]
} | [] | [] | [
[]
] | ||
wb4x4 | If traveling close enough to the speed of light, would a human live to make it to the edge of the observable universe? | Which I believe is ~90 billion light years away.
If you're traveling close enough to the speed of light, is it possible for a human on board to make it this far within their lifetime (70-90 years)?
| askscience | http://www.reddit.com/r/askscience/comments/wb4x4/if_traveling_close_enough_to_the_speed_of_light/ | {
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"text": [
"If you can achieve speeds relative to Earth arbitrarily close to the speed of light, then you can travel an arbitrarily large distance (as measured on Earth) in an arbitrarily small amount of time (as m... | [] | [] | [
[],
[
"http://math.ucr.edu/home/baez/physics/Relativity/SR/rocket.html"
],
[]
] | |
2x1oqv | what is reddit built on and how does each of the technologies used work together? | I'm a first year computer networking student and I like knowing what companies are looking for in employees in order to ensure I'm prepping myself for the real world. A Reddit Admin mentioned they were looking for an infrastructure Engineer and I decided to take a look at what they wanted in someone. They say "reddit i... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2x1oqv/eli5_what_is_reddit_built_on_and_how_does_each_of/ | {
"a_id": [
"cow35u4"
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"score": [
2
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"text": [
"[Python is a programming language](_URL_1_).\n\n[Pylons is a web framework for Python](_URL_0_). Basically, it's a toolkit that gives you some of the generic pieces of a web application, allowing you to focus on the bits that make your site uni... | [] | [] | [
[
"http://www.pylonsproject.org/",
"https://www.python.org/",
"http://www.postgresql.org/",
"http://en.wikipedia.org/wiki/Apache_ZooKeeper",
"http://en.wikipedia.org/wiki/Apache_Cassandra",
"http://memcached.org/"
]
] | |
3mq8lt | When did the idea of the future become that of Sci-fi? | When did it become popular belief that the future would be a time full of unthinkable technological advancement? Did the ancient Greeks or Romans believe their structures of democracy and republic were eternal and utopian, or did they predict any kind of development with time in governing, science or social relation? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3mq8lt/when_did_the_idea_of_the_future_become_that_of/ | {
"a_id": [
"cvhf84y"
],
"score": [
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],
"text": [
"About 1827. Jane Loudon's *The Mummy! A Tale of the 22nd Century* is the earliest speculative fiction I can find that pictures a future of changed and advanced technology and society. Others like Shelley's *The Last Man* picture a future where ev... | [] | [] | [
[]
] | |
6bsrm2 | why do schools in the us invest so much money in sports when education appears to be falling behind? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6bsrm2/eli5_why_do_schools_in_the_us_invest_so_much/ | {
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"text": [
"College sports are billion dollar industries because the nation as a whole is invested in alma maters, student athletes, sports in its... | [] | [] | [
[],
[
"https://www.nytimes.com/2016/05/12/sports/high-school-football-stadium-texas-63-million.html?_r=0"
],
[],
[],
[],
[]
] | ||
fzhtsr | how do silly bands (the weirdly shaped plastic bands from a decade ago) retain their shape even after stretching them for long periods of time? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fzhtsr/eli5_how_do_silly_bands_the_weirdly_shaped/ | {
"a_id": [
"fn4le9k"
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"score": [
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"text": [
"Plastics are made of extremely long, skinny molecules, and a good analogy for what that's like is a big bowl of spaghetti. Weaker plastics are held together by weak attraction between the molecules, as well as the molecules being tangled up. \n\n... | [] | [] | [
[]
] | ||
81q122 | why do little kids like sweet flavors so much more than adults do? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/81q122/eli5_why_do_little_kids_like_sweet_flavors_so/ | {
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"score": [
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"text": [
"Is there evidence to back this up? I have never thought little k... | [] | [] | [
[],
[],
[
"https://recipes.howstuffworks.com/menus/kids-taste-buds.htm"
],
[],
[],
[],
[],
[],
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6dphvs | why we get lot of sticky spit in our mouth when we are crying and lot of snot in nose? | Always wondered this | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6dphvs/eli5why_we_get_lot_of_sticky_spit_in_our_mouth/ | {
"a_id": [
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"score": [
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"text": [
"There is actually a duct running from your eyes into your nasal cavity (nasolacrimal duct), and liquid can run down the back of your nasal cavity into your throat.\n\nApparently, this means medicine applied into your eyes (like eye drops) can end... | [] | [] | [
[]
] | |
e8oxa8 | can a human fetus grow inside an animal? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/e8oxa8/eli5_can_a_human_fetus_grow_inside_an_animal/ | {
"a_id": [
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"score": [
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"text": [
"Unless very specific conditions were met that resembled a human womb, no. If you somehow got the zygote to implant successfully whether it would be able to form a umbilical cord with the host would be a... | [] | [] | [
[],
[],
[]
] | ||
15j50b | How small would an asteroid or other object have to be for you to be able to reach escape velocity simply by jumping off of it? | askscience | http://www.reddit.com/r/askscience/comments/15j50b/how_small_would_an_asteroid_or_other_object_have/ | {
"a_id": [
"c7n8xyw"
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"score": [
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"text": [
"It's the amount of mass, not necessarily the size that matters here. Escape velocity v can be defined as:\n\nv^2 = 2GM/r\n\nand the average human jump speed is about 2.5m/s so we have\n\nM/r = 3.125/G = 4.683 x 10^10 kg s^2 m^-3 \n\nNow, M/r by i... | [] | [] | [
[]
] | ||
2ou09o | Can car engines be given an efficiency rating based upon horsepower ratings? | TL;DR: Would it be possible to convert horsepower to joules, and compare this to potential energy of used gas, in joules, to measure the efficiency of the car in converting chemical potential to mechanical energy?
Hi everyone, I first wanted to take the time to thank everyone for their help in advance.
So to remain t... | askscience | http://www.reddit.com/r/askscience/comments/2ou09o/can_car_engines_be_given_an_efficiency_rating/ | {
"a_id": [
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"score": [
2,
6
],
"text": [
"A joule is 1 kg·m^2/s^2, a watt is 1 kg·m^2/s^3. This can be deeply confusing, because of the multiple applications of time. A watt = J/s, while a Joule = W*s. A horsepower is already comparable to a Watt, both being units o... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/File:Brake_specific_fuel_consumption.svg",
"http://en.wikipedia.org/wiki/Brake_specific_fuel_consumption"
]
] | |
63yihl | if japanese is read top to bottom how do their text boxes work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/63yihl/eli5_if_japanese_is_read_top_to_bottom_how_do/ | {
"a_id": [
"dfy03xn"
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"score": [
7
],
"text": [
"It can also be read and written left to right the same way as English and other such languages. So it works no differently. "
]
} | [] | [] | [
[]
] | ||
1j43kc | Was there an official line of communication betwen the Nazi and Allied leaderships during WWII? If so, what was discussed? | I know that some in the Nazi leadership communicated with the allies near the end, but was there an official line during the thick of WWII? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1j43kc/was_there_an_official_line_of_communication/ | {
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"text": [
"It's a shame this question isn't being jumped on, so I'll add to it in the hopes of provoking discussion;\n\nBy what means would any communication be est... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Protecting_power"
],
[],
[]
] | |
nl4xb | Why do bullets spin? | I know that modern guns are designed to make bullets spin as they are fired in order to improve accuracy, but why does this spinning improve the accuracy? | askscience | http://www.reddit.com/r/askscience/comments/nl4xb/why_do_bullets_spin/ | {
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2
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"text": [
"Learnt this in Physics.\n\nIt's to do with he Magnus effect.\n'The Magnus effect is the phenomenon whereby a spinning object flying in a fluid creates a whirlpool of fluid around i... | [] | [] | [
[],
[],
[],
[]
] | |
28g1kn | What was the romantic relationship process like for humans in ancient times before the modern form of "dating" was invented? | Someone said something about it in /r/Askreddit, but I wanted to ask the experts. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/28g1kn/what_was_the_romantic_relationship_process_like/ | {
"a_id": [
"cialerq"
],
"score": [
14
],
"text": [
"Can you define \"ancient times\"? "
]
} | [] | [] | [
[]
] | |
43tqc7 | how do particle accelerators work? how do they achieve the accuracy to collide one atom or subatomic particle with another, especially considering that we can't create true vacuum? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/43tqc7/eli5_how_do_particle_accelerators_work_how_do/ | {
"a_id": [
"czkvj2w"
],
"score": [
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],
"text": [
"I guess the most important thing to remember is that atoms are mostly empty space. Even when there's a stack of them, they don't tend to talk to each other much, because they're so small and don't influence things unless they're really, really cl... | [] | [] | [
[]
] | ||
7au3sx | [NSFW] How did large Roman armies handle sewage? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7au3sx/nsfw_how_did_large_roman_armies_handle_sewage/ | {
"a_id": [
"dpd8d2j"
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"score": [
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],
"text": [
"Excellent question! And there are a few different answers, really. The first, easiest one would be applicable to an army on the march. When an army was traipsing around the countryside for whatever reason, their camps would be temporary structu... | [] | [] | [
[
"http://www.perseus.tufts.edu/hopper/morph?l=stercus&la=la"
]
] | ||
2qm63h | (Computing) Is there a reason many places have a limit on how long you can make a password? | For my university for instance, the limit is 8 digits. That seems ridiculous to me. Why would they limit how secure you can make a password?
Is there an actual reason for this that I don't understand? | askscience | http://www.reddit.com/r/askscience/comments/2qm63h/computing_is_there_a_reason_many_places_have_a/ | {
"a_id": [
"cn7ulfe",
"cn7vky5"
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"score": [
20,
3
],
"text": [
"In most cases the limit is arbitrary. The password should be hashed before being stored in a database and all of these hashes will be the same length anyway (if the hash length were dependent on the password length then it ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Resource_Access_Control_Facility"
],
[]
] | |
6z9eau | why is it that an image appears large to the naked eye but once i take my phone out to take a picture it's not at the same scale? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6z9eau/eli5_why_is_it_that_an_image_appears_large_to_the/ | {
"a_id": [
"dmthqug"
],
"score": [
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"text": [
"The lens on your phone's camera is equivalent to a 30-35mm lens on a 35mm format camera. That gives the ability to have a fairly wide angle field of view. \n\nThe focal length which best mimics the perspective of the human eye is closer to 50mm. ... | [] | [] | [
[]
] | ||
2jhk27 | What is known about the fate of Hitler's corpse? | I heard that stalin used his skull as an ashtray, is there any truth in that? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2jhk27/what_is_known_about_the_fate_of_hitlers_corpse/ | {
"a_id": [
"clbyhmp",
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119,
25,
6
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"text": [
"Hitler had set orders that his body be cremated upon his suicide, his body was burnt in the Reich Chancellery outside the bunker. Soviet records show the remains of Hitler and his wife Eva were burie... | [] | [] | [
[],
[
"http://inosmi.ru/politic/20091209/156918731.html"
],
[]
] | |
1aynfi | r/askscience, is there anywhere in the world where I could look through a telescope to physically see the artifacts left by astronauts on the moon? | I feel like the answer might be no, or there wouldn't be so denying that we ever landed on the moon. If there is not, what would be the best way to try to do this on a private budget? | askscience | http://www.reddit.com/r/askscience/comments/1aynfi/raskscience_is_there_anywhere_in_the_world_where/ | {
"a_id": [
"c920ycg",
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"score": [
3,
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"text": [
"You can't see the physical artefacts even with a powerful telescope as the angular size of these objects is so small. We can see things [much further away](_URL_3_) because their angular size is so much larger.\n\n > \" It's... | [] | [] | [
[
"http://stupendous.rit.edu/richmond/answers/lunar_lander.html",
"http://www.google.co.uk/moon/",
"http://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment",
"http://www.google.co.uk/search?q=horsehead+nebula"
],
[
"http://what-if.xkcd.com/32/"
]
] | |
nd16n | Why do we get high/loopy when we become tired? | I experience psychotropic reactions when I'm tired / sleep deprived. After some cross examination, this is fairly common. What takes place in the brain when this happens? | askscience | http://www.reddit.com/r/askscience/comments/nd16n/why_do_we_get_highloopy_when_we_become_tired/ | {
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36,
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"text": [
"I am not an expert but I found a good article [here](_URL_0_) that will explain what happens to our brain when we are sleep deprived... | [] | [] | [
[
"http://serendip.brynmawr.edu/exchange/node/1690"
],
[
"http://en.wikipedia.org/wiki/Sleep_deprivation#Effects_on_the_brain"
],
[],
[
"http://serendip.brynmawr.edu/exchange/node/1690"
],
[
"http://en.wikipedia.org/wiki/Sleep_deprivation#Effects_on_the_brain"
],
[]
] | |
1j5n07 | Is time actually linear? | askscience | http://www.reddit.com/r/askscience/comments/1j5n07/is_time_actually_linear/ | {
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"text": [
"You need to define the axes of your graph. Otherwise it's difficult to understand what you mean.",
"You can't really have a stationary point in 3D space, any point in space is... | [] | [] | [
[],
[
"http://www.reddit.com/r/askscience/comments/fjwkh/why_exactly_can_nothing_go_faster_than_the_speed/c1gh4x7"
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[],
[
"http://www.reddit.com/r/askscience/comments/pu1uj/are_time_dimensions_the_same_relatively_as_space/c3sfmbc?context=3"
]
] | ||
votta | What was a typical day in the life of an ordinary sailor like during the Golden Age of Exploration? | I know there's a lot of information to be given in a question like this, so if anyone has book recommendations, I'll gladly accept those as well as direct answers. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/votta/what_was_a_typical_day_in_the_life_of_an_ordinary/ | {
"a_id": [
"c56c7py",
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2,
3
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"text": [
"First of all, a disclaimer, most of what I know deals with the Golden Age of Piracy (roughly 1650-1730) rather than the Golden Age of Exploration (1490-1600s sometime). Also, both of those terms are te... | [] | [] | [
[
"http://www.amazon.com/Villains-All-Nations-Atlantic-Pirates/dp/0807050253/ref=la_B001IGJXYE_1_2?ie=UTF8&qid=1340815883&sr=1-2"
],
[],
[
"http://www.amazon.com/Spains-Men-Sea-Sixteenth-Century/dp/0801881838/ref=sr_1_1?ie=UTF8&qid=1340833758&sr=8-1&keywords=Spains+men+of+the+sea"
... | |
67b8u4 | How could men serve in WW2, Korea, and Vietnam? | Ok, so this question has been bothering me for a while, and i haven't been able to find an answer.
If a man born in 1922 (just an example, don't know if it even is possible) and he served in all three wars, how is that possible?
Weren't there requirements for soldiers?
Did they have to be a specific age?
Did the... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/67b8u4/how_could_men_serve_in_ww2_korea_and_vietnam/ | {
"a_id": [
"dgp9y31"
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"score": [
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"text": [
"So people often trot out 20 years as a full military career, and in many cases it is what the goal is and has been for decades. But often especially senior officers in command billets will serve significantly longer periods of time. 20 is often t... | [] | [] | [
[
"http://www.military.com/benefits/military-pay/the-military-retirement-system.html",
"http://dopma-ropma.rand.org/retirement-for-years-of-service.html"
]
] | |
dhovsn | why do diamonds sparkle but other carbon-based materials do not? | Does coal not sparkle because of its colour or because light does not refract / reflect from the cut facets? Thanks! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dhovsn/eli5_why_do_diamonds_sparkle_but_other/ | {
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2,
2,
5
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"text": [
"I’m not positive but I’m guessing you could polish coal and it would shine if not sparkle. \n\nDiamonds are different because the material is transparent, you... | [] | [] | [
[],
[],
[],
[],
[]
] | |
2l1k1y | why cant humans have a food that brushes their teeth? | We apparently can make food that is good for other species' teeth, but we can't make something that works for ours and makes brushing obsolete? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2l1k1y/eli5_why_cant_humans_have_a_food_that_brushes/ | {
"a_id": [
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],
"score": [
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"text": [
"Um. Any crunchy fruit (apples, pears) or vegetables (carrots, celery) all help to keep our teeth clean?"
]
} | [] | [] | [
[]
] | |
2c1bc8 | US and EU increased sanctions on Russia recently. What specifically do they mean by 'sanctions' and what are typical sanctions a country might impose? | askscience | http://www.reddit.com/r/askscience/comments/2c1bc8/us_and_eu_increased_sanctions_on_russia_recently/ | {
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"cjaxobc",
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18,
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],
"text": [
" > The U.S. and European sanctions are likely to target Russia’s energy, arms and financial sectors. \n\n_URL_0_\n\nThese are t... | [] | [] | [
[
"http://time.com/3049419/white-house-eu-us-to-impose-new-russia-sanctions/"
],
[
"http://www.reddit.com/r/russia/comments/2c4zk3/awesome_reply_on_rasksciencediscussion_about_the/"
],
[],
[
"http://www.npr.org/blogs/money/2014/03/21/292403327/episode-526-a-planet-money-war"
],
[
"http... | ||
26gn3q | During the Weimar Republic there were a lot of different parties in the parliament, many with a low amount of representatives. What role did this play in its downfall? | Some context: Today are the elections for the European Parliament happening in several countries. Germany will send 96 representatives and there is no formal election threshhold (i.e. no 3% or 5% minimum percentage). This will lead to up to 13 parties from Germany being represented, with about half of them with only on... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/26gn3q/during_the_weimar_republic_there_were_a_lot_of/ | {
"a_id": [
"chqwp7l"
],
"score": [
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],
"text": [
"The Wiemar Republic is generally said to end when the Enabling act is passed in 1933, and this is true. But Hitler didn't get that act passed because of a large amount of minor parties, but rather because he managed to destroy the major parties t... | [] | [] | [
[]
] | |
7bufrh | Were there political parties in colonial America? | Did political parties or factions form in the legislatures of each the colonies? Were there local branches of the Whig and Tory parties that existed in the British parliament? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7bufrh/were_there_political_parties_in_colonial_america/ | {
"a_id": [
"dpl1bv8"
],
"score": [
3
],
"text": [
"Yes, there were political parties in Colonial America. My expertise is in New York history, so I will confine my answer to that, so maybe someone else can fill you in on the rest.\n\nAs you may know, New York was originally a Dutch colony that wa... | [] | [] | [
[
"https://books.google.com/books?id=xF4NDALYWSAC&pg=PA112&dq=leislerians",
"https://books.google.com/books?id=dydedpJM490C&pg=PA106&dq=leislerians",
"https://www.jstor.org/stable/1833650?seq=1#page_scan_tab_contents",
"https://books.google.com/books?id=N48LAAAAIAAJ&pg=PA242",
... | |
7qnsli | Is there any truth to the notion that North Americans Natives tribes's war were not "deadly" before European contact ? | Hi r/askHistorians,
I am from Canada and I often hear about how the conflicts between Natives were not really deadly before the arrival of the first Europeans, that the concept of killing your enemies came from the white men. It is often said more specifically that the First People would mostly just "skirmish" between... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7qnsli/is_there_any_truth_to_the_notion_that_north/ | {
"a_id": [
"dss8d3y"
],
"score": [
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"text": [
"Sounds like an exaggeration of the Great Plains tradition of \"Counting Coup\". Key to a man's success in Plains combat was demonstrating his own courage by proving superiority over his opponent and, in a competitive sense, over his own comrades.... | [] | [] | [
[]
] | |
34tw1e | Was Joseph McCarthy as 'crazy' as he is made out to be? | I have always been told that this period of american history was this witchhunt period with people seeing communist everywhere?
But was McCarthy just paranoid or was there any truth to his claims? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/34tw1e/was_joseph_mccarthy_as_crazy_as_he_is_made_out_to/ | {
"a_id": [
"cqy25cl"
],
"score": [
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"text": [
"This has been asked a few times, but there's never been, as far as I can tell, a comprehensive and well-sourced answer. So, I encourage people to provide one. \n\nThat said, there have been _good_ answers. Here's [one](_URL_0_) with some good de... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1m05ej/sen_joseph_mccarthy_is_portrayed_as_a_horrible/",
"http://www.reddit.com/r/AskHistorians/comments/16bchm/under_senator_mac_carthys_witch_hunt_policy_in/"
]
] | |
8sjj63 | why do our eyes start to get watery after staring at something for awhile? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8sjj63/eli5_why_do_our_eyes_start_to_get_watery_after/ | {
"a_id": [
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"score": [
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5
],
"text": [
"Your eyes get dry when you \"stare\" at something (without blinking), so a gland near your eye produces a small bit of tears to keep things moist",
"Because you aren't blinking so the moisture that lubricates your eyes (... | [] | [] | [
[],
[]
] | ||
8o9xv4 | why is it that a car journey feels less bumpy if you are the driver? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8o9xv4/eli5_why_is_it_that_a_car_journey_feels_less/ | {
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"score": [
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"text": [
"For regular 5 seat cars, the location of the driver seat right behind the front wheel helps because the suspension is there for you. My parents have a 8 seater, and sitting in th... | [] | [] | [
[],
[],
[
"https://www.youtube.com/watch?v=7s0CpRfyYp8&list=LLVrVoHlnTrBa6m3Hw4j9GbQ&"
],
[]
] | ||
4bc1pj | The Godfather and popular depictions of Sicily in early 1900s: corruption, mafia, backwardness. How true is this depiction and how did Sicily end up that way? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4bc1pj/the_godfather_and_popular_depictions_of_sicily_in/ | {
"a_id": [
"d17uf0w",
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"score": [
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7
],
"text": [
"The mafia in Siciliy appears to have its origins in the 19th Century brotherhoods that formed in Palermo and other Sicilian cities. The Sicilian economy was largely dependent on Sulphur mining and Lemon orchards which were ... | [] | [] | [
[],
[]
] | ||
4fkxpm | [Question about the Black Death] Did Cats or Dogs that hunted the infected rats get affected by the plague? | It was just a "shower thought" I had, Wouldn't ownership of a cat help cull the population of infected rats hence leading to the trend of owning a house cat?
But wouldn't the predator animals or the rats get infected too?
edit: Thank you for all the replies! | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4fkxpm/question_about_the_black_death_did_cats_or_dogs/ | {
"a_id": [
"d29xh6l"
],
"score": [
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],
"text": [
"I'm not too familiar with medical history but I've done some reading and took a class on the Black Death. I'm sure there are others that would be more qualified on this topic. \n\nYour second assumption is correct, the predator animals and the ra... | [] | [] | [
[]
] | |
5mnlrw | What do we know about the judicial system of ancient Egypt? | How did the ancient Egyptians solve disputes? How did they deal with crime?
I realize I'm asking about an incredibly long period of time and there might have been considerable changes over the course of 3000 years, but feel free to focus on any particular era that might be of interest.
| AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5mnlrw/what_do_we_know_about_the_judicial_system_of/ | {
"a_id": [
"dc7axel"
],
"score": [
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],
"text": [
"Most of the time people use Ancient Egypt that way :D\n\nHowever, Egypt did indeed keep a lot of its' institutions very similar throughout much of its' native dynasties. But, for clarity's sake, let's stick with the New Kingdom period. \nSave for... | [] | [] | [
[]
] | |
17ur4u | What language was spoken by common Romans? | I understand Latin was the official language of the Roman Empire, but I am not sure if the common people spoke it. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17ur4u/what_language_was_spoken_by_common_romans/ | {
"a_id": [
"c890c56",
"c890wdg"
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"score": [
3,
2
],
"text": [
"It depended where they lived. If they lived in Rome, they spoke Latin. Elsewhere they spoke their native language - Greek in Greece, Aramaic in Judea, the various Celtic dialects in north western Europe, and so on.",
"De... | [] | [] | [
[],
[]
] | |
6nn76j | Blues music originated from slaves in the US and has influenced and permeated almost all Western music for the last century. Is there any evidence of music playing slave owners adopting "black styles" of music? If so, how was this perceived by other whites? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6nn76j/blues_music_originated_from_slaves_in_the_us_and/ | {
"a_id": [
"dkbnf8r"
],
"score": [
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"text": [
"You know how 'blackface' - the practice of white singers and actors darkening their faces to act black - is now so taboo as to be a career-ending move? Well, there's a very good historical reason for that taboo: a genre of music called minstrelsy... | [] | [] | [
[
"https://www.youtube.com/watch?v=-Xu71i89xvs",
"https://www.youtube.com/watch?v=otNICva63mQ"
]
] | ||
3zpyyg | To what extent was Spain colonized by Carthage? | I was brushing up on the Punic Wars and saw a Wikipedia [map](_URL_0_) that shows Roma and Carthage. It shows Spain to be under Carthaginian control surprisingly far inland.
What was the Carthaginian presence in Spain like up until the Punic Wars? Was it like Roman colonization where Romans went there to live as well... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3zpyyg/to_what_extent_was_spain_colonized_by_carthage/ | {
"a_id": [
"cyo5dv7",
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"score": [
315,
28,
11
],
"text": [
"You may find something like [this map](_URL_0_) to be a better representation of the complexities of Carthaginian Spain. \n\nCarthage did have true colonies in Spain. But they were limited to the SE... | [] | [
"https://en.wikipedia.org/wiki/File:Map_of_Rome_and_Carthage_at_the_start_of_the_Second_Punic_War.svg"
] | [
[
"https://upload.wikimedia.org/wikipedia/commons/4/49/Iberia_237-206BC.svg"
],
[],
[
"https://www.youtube.com/watch?v=nv8AxEvsZbE",
"http://www.open.edu/openlearn/whats-on/tv/blood-and-gold-the-making-spain-simon-sebag-montefiore",
"https://www.youtube.com/watch?v=JjJPWNdlYW4",
"https://w... | |
2qk36j | What is the difference between a proton and a positron? | Could they be interchangeable? Or do they have other properties than their charge? | askscience | http://www.reddit.com/r/askscience/comments/2qk36j/what_is_the_difference_between_a_proton_and_a/ | {
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"score": [
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"text": [
"A proton is about 1800 times as massive, for one.",
"There are quite a few differences, but for starters, p... | [] | [] | [
[],
[],
[],
[],
[],
[],
[]
] | |
59dcdv | how does apple cider vinegar help relieve heartburn? | My doctor told me to give it a shot. I bought a bottle, but I'm not sure how adding acid to a problem caused by acid is anything short of counterintuitive. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/59dcdv/eli5_how_does_apple_cider_vinegar_help_relieve/ | {
"a_id": [
"d97lag1"
],
"score": [
5
],
"text": [
"Not a Dr but this what mine told me. Also it works for me. There is some reason why you stomach is making more acid than it needs, by taking an antacid you are neutralizing acid and therefore your stomach makes even more to compensate. By adding ... | [] | [] | [
[]
] | |
5jeczr | Would English archers receive any melee weaponry or training? In close quarters, would they fare any better than a civilian? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5jeczr/would_english_archers_receive_any_melee_weaponry/ | {
"a_id": [
"dbftwyn",
"dbfu00h"
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"score": [
14,
7
],
"text": [
"If we're talking about English longbowmen in the high Middle Ages, then yes, they would have had some sort of melee weapon for backup use if they were surprised at close ranges. Jean Warrin, writing about Agincourt, describ... | [] | [] | [
[],
[
"https://www.reddit.com/r/AskHistorians/comments/4uhwmf/meta_what_kind_of_questions_do_you_guys_like_to/d5q5k9p/"
]
] | ||
2qzolw | why do car companies name their cars a year in advance? | Why do the 2015 cars come out in 2014 and so on? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2qzolw/eli5why_do_car_companies_name_their_cars_a_year/ | {
"a_id": [
"cnb1d04"
],
"score": [
5
],
"text": [
"The 2015 cars are just 2015 models that are released early. The are normally released in the last few months before the year ends. This stops the lull in sales that occurs when people decide that they want to wait to buy a car until next years mo... | [] | [] | [
[]
] | |
23djde | Where was the Judicial Review principle of the United States based from? how did it came to existence? | Curious about the Judicial review authority in the US while there is no mention of it in the US constitution. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/23djde/where_was_the_judicial_review_principle_of_the/ | {
"a_id": [
"cgw4br5"
],
"score": [
5
],
"text": [
"See the case of [Marbury v. Madison](_URL_0_). In that case, the Supreme Court under John Marshall found the long-existing concept of judicial review to be implicit in the constitution."
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Marbury_v._Madison"
]
] | |
1do3kc | how do they make 3d sound work? | I play empire total war. I can play a battle and hear battle sounds based on where the camera is. It took me a long time to realize that I'd, for example, react to the sounds of a cavalry charge behind me to the right. But how??? I have 2 speakers and a subwoofer. It's all in front of me! Please explain this wizardry... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1do3kc/eli5_how_do_they_make_3d_sound_work/ | {
"a_id": [
"c9s6hi1"
],
"score": [
2
],
"text": [
"They do it the same way they create the 3D illusion for your eyes -- by controlling how long it takes the information to get to your brain. In the case of 3D vision, the image going to your left eye comes from a slightly different place than your... | [] | [] | [
[
"https://www.youtube.com/watch?v=IUDTlvagjJA"
]
] | |
v1ccx | How valid is Lucid Dreaming? Can you really condition yourself to Dream what you want? | I've been told Lucid Dreaming is when your aware your dreaming, and can control it to a certain degree. Can you really manipulate your mind so you have complete control over what you dream about? | askscience | http://www.reddit.com/r/askscience/comments/v1ccx/how_valid_is_lucid_dreaming_can_you_really/ | {
"a_id": [
"c50ghhs"
],
"score": [
11
],
"text": [
"The first evidence for lucid dreaming was produced in the late 1970s by British parapsychologist Keith Hearne. A volunteer named Alan Worsley used eye movement to signal the onset of lucidity, which were recorded by a polysomnograph machine. \n\... | [] | [] | [
[]
] | |
uh95w | How likely is it for meiosis to dish out extra and lacking chromosomes which happen to result in the correct total for a 'normal' human? | What is the statistically likelihood that a person exists who has a complete 46 chromosomes, but due to nondisjunction during meiosis I in the mother, he or she received a double of one chromosome from the egg, and due to nondisjunction in the father of the same chromosome, the resulting sperm had a single copy of all ... | askscience | http://www.reddit.com/r/askscience/comments/uh95w/how_likely_is_it_for_meiosis_to_dish_out_extra/ | {
"a_id": [
"c4vez9x"
],
"score": [
6
],
"text": [
"What you are describing is actually a reasonably well studied phenomenon known as [uniparental disomy](_URL_0_).\n\nFor hard numbers, it is difficult to tell how often this occurs, because if it causes no ill effects or phenotypic expression in t... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Uniparental_disomy"
]
] | |
3rmxe3 | How can a black hole's singularity be a "point", wouldn't that violate the pauli exclusion principle? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/3rmxe3/how_can_a_black_holes_singularity_be_a_point/ | {
"a_id": [
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"cwpirf0",
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"score": [
10,
11,
6,
3,
2
],
"text": [
"Because it's not actually a point. It looks more like an instant of time.\n\nI talked about it in detail here _URL_0_",
"/u/rantonels has covered the pr... | [] | [] | [
[
"http://www.reddit.com/r/askscience/comments/3q1odh/since_a_singularity_is_infinitely_small_can_2/cwbc17h"
],
[],
[],
[
"https://www.reddit.com/r/askscience/comments/2oosa2/how_does_a_black_holes_singularity_not_violate/"
],
[]
] | |
ltyaj | How does the human digestive system separate solids from liquids? | askscience | http://www.reddit.com/r/askscience/comments/ltyaj/how_does_the_human_digestive_system_separate/ | {
"a_id": [
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"score": [
8,
2,
5,
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5
],
"text": [
"They all mix together into a liquid solution. This is broken up in the stomach and nutrients are absorbed through the small intestine (e... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
2fvwro | In the Napoleonic Wars, what was the difference between a soldier in an elite unit and a regular unit? | Were there special units if somebody wanted to join a regiment like the Imperial guards?
I can understand special requirements for modern day, medieval and ancient elite regiments, but when it comes to the 19th Century all I can tell is that they only needed to charge, reload and march - just like all the other regim... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2fvwro/in_the_napoleonic_wars_what_was_the_difference/ | {
"a_id": [
"ckd9i1d",
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"score": [
4,
5
],
"text": [
"Joining Napoleon's Imperial Guard had quite a few requirements. First, soldiers weren't allow to just join the Guard, you had to be selected.\n\nThis is one of Napoleon's decrees after making himself Emperor of the French a... | [] | [] | [
[],
[]
] | |
5y0zpd | what happens when astronauts clog the toilet in space? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5y0zpd/eli5what_happens_when_astronauts_clog_the_toilet/ | {
"a_id": [
"demcoeh",
"demfsa3",
"demom9i"
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"score": [
77,
16,
13
],
"text": [
"There's not really anything to get clogged because space toilets don't have plumbing like Earth ones do. For solid waste, the astronaut \"sits\" over the opening which has a plastic bag underneath. T... | [] | [] | [
[],
[],
[]
] | ||
er6iqj | why is it when you experience anxiety or fear your body starts getting hotter? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/er6iqj/eli5why_is_it_when_you_experience_anxiety_or_fear/ | {
"a_id": [
"ff1vocg",
"ff1vp6m"
],
"score": [
4,
2
],
"text": [
"Because stress increase blood pressure. Heart begins to pump aggressively, blood is going through the body faster and more regularly, like when you’re working out. So the body becomes incredibly overheated from the body flip... | [] | [] | [
[],
[]
] | ||
bx7n2k | how does increasing government spending affect aggregate demand in the economy? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bx7n2k/eli5_how_does_increasing_government_spending/ | {
"a_id": [
"eq44w05",
"eq46c17"
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"score": [
4,
2
],
"text": [
"The general idea is that aggregate demand is comprised of _all_ of the entities buying goods. That includes individual consumers, businesses, foreign firms and governments. If any of those groups starts buying more, then a... | [] | [] | [
[],
[]
] | ||
d5sqxb | the lack of goal line replay technology in american football as compared to other sports | For example, tennis has hawk eye and soccer has goal line technology. How come football still doesn't have anything capable of accurately measuring where the ball is on the field for touchdowns, first downs etc.? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d5sqxb/eli5_the_lack_of_goal_line_replay_technology_in/ | {
"a_id": [
"f0nvbk9",
"f0nvte4",
"f0nwdo1"
],
"score": [
3,
8,
2
],
"text": [
"The more interesting proposals in football actually doesn't involve cameras. Instead they would have chips embedded in the ends of the football that would send a signal if it breaks the goal line.",
... | [] | [] | [
[],
[],
[]
] | |
4dcvsq | Are quarks and electrons really indivisible? | I read somewhere that quarks and electrons are indivisible. How can we know that? As far as I know, the term "atom" means indivisible in greek, which shows we once thought the atom was indivisible as well.
It's hard for me to understand how something can exist without being made of anything else, it just exists. | askscience | https://www.reddit.com/r/askscience/comments/4dcvsq/are_quarks_and_electrons_really_indivisible/ | {
"a_id": [
"d1q3rfu"
],
"score": [
7
],
"text": [
" > It's hard for me to understand how something can exist without being made of anything else, it just exists.\n\nDo you imagine that the sub-particles of electrons and quarks would also have sub-particles etc.? I find the idea of there being an ... | [] | [] | [
[]
] | |
5l12pq | how do we not run out of stuff? like metals, helium, plastic, salt, anything? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5l12pq/eli5_how_do_we_not_run_out_of_stuff_like_metals/ | {
"a_id": [
"dbs5e4w"
],
"score": [
12
],
"text": [
"Metals are recycled and mined. There's actually a shitload of metal on earth, for example the earth is about 8% aluminum. It will be hard to run out of aluminum.\n\nHelium, we are running out of. It's the smallest molecule, and the second lighte... | [] | [] | [
[]
] | ||
1zgclq | Which is more energy efficient, internal combustion driven generator to power an electric motor, or direct drive? | I was told that it's more energy efficient to produce electricity with an onboard gasoline engine to drive an electric motor via a magneto than it is to simply have the drive system connected directly to the gasoline engine. I don't believe that, but am I wrong? Why?
P.s. I apologize if this isn't the correct sub ... | askscience | http://www.reddit.com/r/askscience/comments/1zgclq/which_is_more_energy_efficient_internal/ | {
"a_id": [
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"score": [
3
],
"text": [
"This would only be true in a more complicated system like in some hybrid cars, where the internal combustion engine first charges a battery. This has the advantage of regulating the output of the engine, so that it can operate at maximum fuel ef... | [] | [] | [
[]
] | |
2prims | realistically speaking, are there any benefits to continuing an embargo on cuba? | I grew up in the 80's and 90's, and the Cuban embargo has always seemed to be this ridiculous relic of the past. If the goal was to induce regime change, well, that's been failing now for 40+ years. If the goal is to somehow reduce terrorism by Cubans, well, I don't think that was ever a serious threat when viewed in... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2prims/eli5_realistically_speaking_are_there_any/ | {
"a_id": [
"cmzddyx"
],
"score": [
3
],
"text": [
"America has a lot of Cuban refugees and immigrants who were trying to escape Cuba. Many of them were political prisoners. Others just wanted a better life. They held such a gross animosity towards Castro.\n\nSo they all live in Florida. And, ... | [] | [] | [
[]
] | |
4omsyl | if dogs can just eat dog food and be healthy, why can't humans eat "human food" equivalent and be healthy? | I feel like humans need such a large variety of foods to be healthy, yet dogs can live just fine on one dog food their whole life. Why is that? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4omsyl/eli5_if_dogs_can_just_eat_dog_food_and_be_healthy/ | {
"a_id": [
"d4dwrdu",
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"d4dyn86",
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"d4e1xpe",
"d4e2rkg",
"d4e9os4",
"d4efgw1",
"d4eggzj",
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"d4egyba",
"d4ei4td",
"d4eild8",
"d4eo6s7",
"d4eoy5q"
],
"score": [
230,
514,
... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Soylent_(drink%29)",
"https://en.wikipedia.org/wiki/Nutraloaf"
],
[],
[
"http://robrhinehart.com/?p=298"
],
[],
[],
[],
[],
[],
[],
[],
[
"http://www.nathanedwardwilliams.com/fun/monkeydiet.htm",
"http://www.angryman.ca/monkey.html"
... | |
23ys13 | the cliven bundy cattle grazing situation (not the racist remarks) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23ys13/eli5_the_cliven_bundy_cattle_grazing_situation/ | {
"a_id": [
"ch1vexh",
"ch1vgvf",
"ch1wd2e"
],
"score": [
17,
2,
2
],
"text": [
"A rancher, Bundy, paid the government money to use their land to let his cattle graze (pretty common practice). He quit paying the bill so the government told him to stop using their land. He still u... | [] | [] | [
[],
[],
[
"http://en.m.wikipedia.org/wiki/Clive_Bundy"
]
] | ||
4awumv | what does the type of tv "producer" mean to the actual end result? | Example: Current season of House of Cards opening credits: There are Producers, Co-Producers, Executive Producers, etc. all in the opening credits. How does everyone with "producer" in there name differ from a job role perspective? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4awumv/eli5_what_does_the_type_of_tv_producer_mean_to/ | {
"a_id": [
"d147ahb",
"d1487qr"
],
"score": [
5,
6
],
"text": [
"\" Producer \" once was the big boss, but slowly Executive Producer has become The Man, the \" Show Runner.\" Most titles in film and tv are very detailed and policed because these people are in craft guilds and protect thei... | [] | [] | [
[],
[]
] | |
uwrmu | Neutrino speed | If I'm not mistaken all measurements of neutrino speed always give something at least very very close to the speed of light and pretty much always consistent with their speed being the speed of light. At the same time the discussion continues if neutrinos have mass. But if they had mass, wouldn't they be able to move a... | askscience | http://www.reddit.com/r/askscience/comments/uwrmu/neutrino_speed/ | {
"a_id": [
"c4z97lp",
"c4z9ewm"
],
"score": [
5,
3
],
"text": [
"Basically, the experiments we have to measure neutrino speed are only so precise (they're pretty difficult experiments to set up because neutrinos are so ephemeral and the sun spews so many of them at us), and the difference... | [] | [] | [
[],
[]
] | |
2gahf8 | Is the Roman Catholoic tradition of canonizing saints connected to the Roman (pagan?) tradition of deifying state heroes? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2gahf8/is_the_roman_catholoic_tradition_of_canonizing/ | {
"a_id": [
"ckh997k",
"ckha1gt"
],
"score": [
325,
67
],
"text": [
"Before Christianity was ever centered in Rome, it spread throughout the Middle East, made its way across the former Persian empire to India and traveled south, deep into Africa. Although Rome was the center of the Roman e... | [] | [] | [
[],
[
"http://www.reddit.com/r/AskHistorians/comments/2g722m/whats_the_origin_of_saint_worship_in_christianity/"
]
] | ||
4a0u86 | if light moves so fast, then why to we see light blur from cars and light sabers? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4a0u86/eli5_if_light_moves_so_fast_then_why_to_we_see/ | {
"a_id": [
"d0wgby6",
"d0wglw8",
"d0wgr1y"
],
"score": [
2,
9,
3
],
"text": [
"Well lightsabers aren't real so what you're seeing is artistic visual effects, particularly in their case called \"fanning\". ;) But as for motion blur, that's a feature of your eyes not being able to p... | [] | [] | [
[],
[],
[]
] | ||
3kfkh6 | Is there an infinitesimal equivalent to the Dirac delta function? | In any course about Fourier transforms you will inevitably come across the [Dirac delta function](_URL_0_), δ(t). It is defined as 0 for all t != 0, and undefined at t = 0. It also has the property that when integrated across the origin the result is 1. The delta function is a limit case to the unit block function, ess... | askscience | https://www.reddit.com/r/askscience/comments/3kfkh6/is_there_an_infinitesimal_equivalent_to_the_dirac/ | {
"a_id": [
"cux63wp",
"cuxraek"
],
"score": [
4,
6
],
"text": [
"In statistics there are improper priors, which are similar. For example, the uniform prior over the real numbers. It has a constant probability density over the reals, but since it's a probability distribution, it has to int... | [] | [
"https://en.wikipedia.org/wiki/Dirac_delta_function"
] | [
[],
[
"http://mathoverflow.net/questions/143587/fourier-transforms-of-finitely-additive-bounded-measures",
"https://en.wikipedia.org/wiki/Measure_(mathematics\\)",
"https://en.wikipedia.org/wiki/Content_(measure_theory\\)",
"https://en.wikipedia.org/wiki/Distribution_(mathematics\\)"
]
] | |
fqsjk | Why hasn't 'ugly' been bred out? | Surely if more attractive people are more likely to produce offspring there should be a trend towards more attractive people. | askscience | http://www.reddit.com/r/askscience/comments/fqsjk/why_hasnt_ugly_been_bred_out/ | {
"a_id": [
"c1hy1z4",
"c1hy4kw",
"c1hy6rt",
"c1hz1kk",
"c1hzbph",
"c1hzdpr",
"c1hzew7",
"c1hzmbl"
],
"score": [
19,
15,
9,
2,
2,
6,
3,
8
],
"text": [
"Genetics is complicated. The shape of your face (for instance) is determined by a rather c... | [] | [] | [
[],
[],
[
"http://en.wikipedia.org/wiki/Directional_selection"
],
[],
[],
[],
[],
[]
] |
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