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 |
|---|---|---|---|---|---|---|---|---|---|
6lovv4 | the g20 summit. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6lovv4/eli5_the_g20_summit/ | {
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"It's the biggest 20 industrial and threshold nations coming together and arguing about the most important current and future challenges. How we're going about globalisation, what we're going to do about North Korea, what we're going to do against... | [] | [] | [
[]
] | ||
91q3yi | How did ancient Asian steppe warriors fight each other? | In *Empire of the Mind* the author goes over a battle between Rome and Parthia in some detail, explaining that Parthian hit-and-run tactics drained the slow, heavily-armored Romans, while also denying them the quick and decisive victory they had hoped for (and, strategically, depended on). This pattern would repeat its... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/91q3yi/how_did_ancient_asian_steppe_warriors_fight_each/ | {
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"I'm loving the questions this week. I'm gonna have some fun with this and go into everything from warfare to military equipment. I'll mostly be using the Scythians, Alans, and Huns as examples, but much of this applies to other cultures and I'll... | [] | [] | [
[]
] | |
yuwsk | why does it seem the larger any particular group get, the more stupid it becomes. are human beings just naturally inclined to be dumb? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/yuwsk/eli5_why_does_it_seem_the_larger_any_particular/ | {
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"Fuck, i made a typo while asking a question about stupidity. Forgive me internets.",
"Human beings, like many species, are highly social animals. We are strongly driven to ensure we \"fit in\" with ... | [] | [] | [
[],
[],
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2fs703 | Is there any evidence that being put under anesthetic permanently alters your behavior, personality, or mental health? | I have heard of a few anecdotal stories of people just changing for better or worse after a surgery that included anesthetic. Is there any evidence or studies done to support that anesthetic can cause permanent changes in the brain, either immediately or gradually? | askscience | http://www.reddit.com/r/askscience/comments/2fs703/is_there_any_evidence_that_being_put_under/ | {
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"It is well established that some patients (especially older people) show temporary signs of delusion, halllucinations, memory loss and other mental and cognitive changes after surgery involving anesthesia. \n\nThis condition is known as postopera... | [] | [] | [
[
"http://www.scientificamerican.com/article/hidden-dangers-of-going-under/*"
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5d9kfm | why do so many animals, excluding humans, have retractable 'male genitalia'? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5d9kfm/eli5_why_do_so_many_animals_excluding_humans_have/ | {
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"text": [
"Most animals are much closer to the ground than we are, and dragging your frank and beans around would damage them. Other than that, they also have to consider the target that blo... | [] | [] | [
[],
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1mf26j | in computer software, what is the difference between a program, service, thread, process etc.? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1mf26j/eli5_in_computer_software_what_is_the_difference/ | {
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"A program is a very general term for any piece of software. Your internet browser is a program. Your word processor is a program. iTunes is a program. Each app on your smart phone is a program.\n\nA process can be thought of as a program that is ... | [] | [] | [
[]
] | ||
4agnxk | suppose I dropped you in constantinople in 659 and then in 1167, what differences would you expect to see? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4agnxk/suppose_i_dropped_you_in_constantinople_in_659/ | {
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"text": [
"Any answer is inevitably going to be patchy. Our knowledge of the seventh century is much poorer than what we have for the twelfth. We are much better informed about religious foundations than the demography of housing, for example. For a general... | [] | [] | [
[
"http://www.byzantium1200.com/"
]
] | ||
sdw42 | Could we replace eating with nutrient injection intravenously? | If we could, what would happen to organs like the stomach and liver etc? | askscience | http://www.reddit.com/r/askscience/comments/sdw42/could_we_replace_eating_with_nutrient_injection/ | {
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"text": [
"Yes, [Total Parenteral Nutrition](_URL_0_) is a reasonably common intervention, used when for whatever reason a patient cannot tolerate oral food. Its normally used only in the short term (weeks/months) but it can replace normal digestion indefin... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Parenteral_nutrition"
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322ulv | Did British military officers during the Napoleonic Wars receive training? | I'm currently reading Bernard Cornwell's Sharpe novels, and they make it seem like significant numbers of the British officers at the time were dilettantes. Cornwell quotes statistics like only 1 in 20 officers being promoted from the field, while the rest bought their commissions using their own money.
Generals clea... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/322ulv/did_british_military_officers_during_the/ | {
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"Please bear in mind that Cornwell is a novelist and is trying to create an atmosphere in which his \"working class hero\" can be seen to be particularly successful. A dilettante officer wouldn't last long on active service in the field, so althou... | [] | [] | [
[]
] | |
26v7aq | why does the water in the coffee pot *refuse* to pour neatly from the spout, no matter how slowly i pour, dribbling down the front instead until it's half empty? | Is it something to do with surface tension? Cheap glass? Or do coffee pots just hate me? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/26v7aq/eli5_why_does_the_water_in_the_coffee_pot_refuse/ | {
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"Surface adhesion, which is closely related to surface tension, which is basically water's property to cling to surfaces. A rougher, more coarse surface is easier for water to adhere to (more surface area). But what you actu... | [] | [] | [
[],
[]
] | |
5m4kfq | How does a charged particle not lose all of its energy even though it constantly generates an electromagnetic field? | If a charged particle creates an electromagnetic field, doesn't the information in that field have to be carried by photons to "sense" whether or not there exists another charged particle in the field? As far as I know, information can't be shared or transferred without using energy, and charged particles share informa... | askscience | https://www.reddit.com/r/askscience/comments/5m4kfq/how_does_a_charged_particle_not_lose_all_of_its/ | {
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"The electrostatic field of a charge *has* or *carries* a certain amount of energy and information. It does not need a *constant input* of energy or information from the charge. ... | [] | [] | [
[],
[],
[],
[]
] | |
4wqtu4 | why can't we harness the vaporized fossil fuel from engine exhaust and use it again? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4wqtu4/eli5_why_cant_we_harness_the_vaporized_fossil/ | {
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"The exhaust from a standard combustion engine isn't \"vaporized fos... | [] | [] | [
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"http://www.scientificamerican.com/article/bionic-leaf-makes-fuel-from-sunlight/"
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7s6vmg | why has it become virtually impossible for politicians on either side to work across party lines? why has "bipartisan" become such a dirty word? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7s6vmg/eli5_why_has_it_become_virtually_impossible_for/ | {
"a_id": [
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"text": [
"It gives their voters the illusion that they’re fighting for what they want, but the rival party won’t let them get any new laws passed. In reality, they all work together and pass whatever the lawmakers want."
]
} | [] | [] | [
[]
] | ||
2zhvrr | the different types of logical fallacies | And how to identify them | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2zhvrr/eli5_the_different_types_of_logical_fallacies/ | {
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"text": [
"There are a few dozen common fallacies, so it would be tough to explain all of them.\n\n[This should help you learn some of the most commonly found ones though!](_URL_0_).",
"There's tons so off th... | [] | [] | [
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"https://yourlogicalfallacyis.com/"
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"http://youtu.be/Rzxr9FeZf1g"
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1fpeou | If fish can remove oxygen from water, then why can't (or haven't) we created SCUBA gear that can do the same? | askscience | http://www.reddit.com/r/askscience/comments/1fpeou/if_fish_can_remove_oxygen_from_water_then_why/ | {
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"text": [
"Fish are cold blooded, so they need much lesser oxygen than humans (hot blooded).\n\nIn water, the dissolved oxygen content is approximately 8 cm^3/L compared to that of air which is 210 cm^3/L.\n\nAn average diver with a f... | [] | [] | [
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"http://en.wikipedia.org/wiki/Artificial_gills_(human)"
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"http://www.reddit.com/r/askscience/comments/np6pe/why_cant_we_create_underwater_breathing_technology/"
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269aok | If the testes are on the outside of the body because they need to be at a temperature lower than the body temperature, how come men living in deserts or other hot climates aren't sterile? | askscience | http://www.reddit.com/r/askscience/comments/269aok/if_the_testes_are_on_the_outside_of_the_body/ | {
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"text": [
"Sweaty balls. In hot climates your balls can still be lower than body temperature because sweaty balls. Your surface temperature can drop lower than body temperature with the cooling effects of sweat. Hotter balls do result in lower fertility th... | [] | [] | [
[]
] | ||
tiu4x | How do brass instruments work? | I'm a high school trumpet player and I've always been curious as to exactly HOW they work. Some of my friends are also wondering how, so I just want a way to explain it to them. | askscience | http://www.reddit.com/r/askscience/comments/tiu4x/how_do_brass_instruments_work/ | {
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"text": [
"Not just brass, but from my simple understanding, the vibrations from the mouthpiece/reed are amplified as they pass through the instrument. The shape of the instrument affects the tone and pitch.",
"Your lips produce a ... | [] | [] | [
[],
[]
] | |
1y8c9g | what does a pilot see when they say turbulence is to be expected for the next x duration of the flight? how do they know how rough it is going to be? why can't they just go higher or lower than whatever the weather is? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1y8c9g/eli5_what_does_a_pilot_see_when_they_say/ | {
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"text": [
"It depends where it is.\n\nSometimes it's possible to see bad weather visually - large cumulus clouds are nearly always turbulent. Other times it shows up on the weather radar - a device which sends out a radar signal that bounces off of water d... | [] | [] | [
[]
] | ||
61nlc7 | In medieval warfare, did all soldiers have shields with their lord's coat of arms or is that just a Game of Thrones thing? | In Game of Thrones, the armies have shields with the coat of arms of their lord. For example, a soldier living under Stark territory would have a Stark Shield, a solider living under Tyrell territory a Tyrell shield, a soldier under Frey territory, a Frey shield, etc. Is this true for medieval England / Europe?
So if... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/61nlc7/in_medieval_warfare_did_all_soldiers_have_shields/ | {
"a_id": [
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"text": [
"Okay, so you're kind of mixing two concepts up a bit here: heraldry and livery. Soldiers have basically always decorated their equipment, but after heraldry became fully established in the 13th century, to bear a coat of a... | [] | [] | [
[],
[
"https://www.reddit.com/r/AskHistorians/comments/5snudn/how_did_families_get_their_crests_and_coats_of/",
"https://www.reddit.com/r/AskHistorians/comments/4b7yfs/did_noble_families_in_the_middle_ages_have_a/",
"https://www.reddit.com/r/AskHistorians/comments/4jd8ju/what_would_the_average_medieva... | |
a0vyew | definition of a parsec for an amateur astronomer | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a0vyew/eli5_definition_of_a_parsec_for_an_amateur/ | {
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"3.26 light-years or the distance of an object where the orbit of the Earth around the sun creates a visual **P**arallax of one **ar**c**sec**ond\n\nParallax is the difference in apparent position of an object viewed from tw... | [] | [] | [
[],
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7dw5iu | why do languages from far away cultures have similarities? | for example the japanese word for cake sounds almost exactly the same like english word for cake, even though the two cultures were very far away | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7dw5iu/eli5why_do_languages_from_far_away_cultures_have/ | {
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"text": [
" If I had to venture a guess I’d say that if the Japanese word sounds similar it’s either because of coincidence, or that word was actually influenced by English at some point.",
... | [] | [] | [
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c8t03c | how can detectives and others match someone's handwriting to a specific person? | I always feel like my handwriting varies so much that it would be impossible to match any of it to me. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/c8t03c/eli5_how_can_detectives_and_others_match_someones/ | {
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"The answer is they can't enough for it to hold up in court. They can use it as a detective tool but it is sort of like the lie detector, it doesn't hold up in court."
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} | [] | [] | [
[]
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a08fn4 | what happens in your body when you take antidiarrheal medicine? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a08fn4/eli5_what_happens_in_your_body_when_you_take/ | {
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"The most common antidiarrheal medicine is an opioid drug, like morphine, but it doesn't get absorbed from the GI tract very much at all. Opioid drugs really slow down your intestines, so much that addicts often have issues with chronic constipat... | [] | [] | [
[]
] | ||
1ufhzz | why are some people so prone to cavities? | I'd like to know why is it that some people seem to be over the top prone to dental health issues, where as others aren't as unlucky?
Example, I've taken phenomenal care of my teeth, brushing after every meal, flossing, flouride mouthwash and everything, yet every dentist visit yields another 5 or more cavities. Th... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ufhzz/eli5_why_are_some_people_so_prone_to_cavities/ | {
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"Some folks just have soft teeth. My family especially is notorious for having \"soft\" ... | [] | [] | [
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tc3lu | Why do we work so hard to keep dandelions out of
our yards in America? Are they harmful somehow? | When I was a kid, I always associated dandelions with those really prickly weeds that were a pain in the ass to step on, so it made sense to me... but really, what do dandelions do? | askscience | http://www.reddit.com/r/askscience/comments/tc3lu/why_do_we_work_so_hard_to_keep_dandelions_out_of/ | {
"a_id": [
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"text": [
"Dandelions are actually good for gardens. They draw nutrients into the soil and attract pollinators. Visually, they can be unappealing, however.\n\n[Source](_URL_0_)",
"Dandelions are generally just removed because they ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Dandelion#As_a_beneficial_weed"
],
[]
] | |
sb7tn | lenz's law | Friend in physics was trying to explain this law to me, but I found his explanation to be slightly confusing. So from a physics standpoint, what is Lenz's Law? I would appreciate a simplified response, but if it is difficult, you can give me a more "mature" or scientific version as well. And trust me, I know some basic... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/sb7tn/eli5_lenzs_law/ | {
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"text": [
"So it starts with electromagnetic induction. Simply put, a changing or moving magnetic field generates an electric field, and a changing or moving electric field generates a magnetic field. This is simple enough - it's how... | [] | [] | [
[],
[]
] | |
1oa9st | How can fluid pressure only be dependent of density, height and gravitational pull? | I was wondering how fluid pressure worked, and I stumbled upon this webpage: _URL_0_ Unfortunately, this website made the entire thing only more confusing for me. I simply can't figure out how the pressure can be equal at the same height in all three pictures displayed there. It just seems obvious that a small mass of ... | askscience | http://www.reddit.com/r/askscience/comments/1oa9st/how_can_fluid_pressure_only_be_dependent_of/ | {
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"text": [
"Without getting into too much detail, the simple answer is that the walls of the container are pushing back on the water with the same force the water pushes on them (newtons 3rd law). So in the case with a large bottom and... | [] | [
"http://hyperphysics.phy-astr.gsu.edu/hbase/pflu.html"
] | [
[],
[]
] | |
55ey3w | why do volcanoes contain lava, or do they make it by melting rock or something else? maybe better asked as, where does lava come from? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/55ey3w/eli5_why_do_volcanoes_contain_lava_or_do_they/ | {
"a_id": [
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"text": [
"Molten rock is what is in the centre of our earth where it's very, very, hot. Pressure within the volcano builds and eventually erupts. No one \"makes\" lava, it's a natural product",
"[Within volcanoes is a crack in the... | [] | [] | [
[],
[
"http://image.slideserve.com/308552/slide1-n.jpg"
]
] | ||
6g24ls | How were the Watergate hearings, and Nixon's resignation, covered in Soviet media? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6g24ls/how_were_the_watergate_hearings_and_nixons/ | {
"a_id": [
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"text": [
"As a followup, how was Nixon covered prior to that? Was he mentioned often at all?",
"You may find this thread and its top answer by u/desoulis helpful\n\n\n_URL_0_"
]
} | [] | [] | [
[],
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"https://www.reddit.com/r/AskHistorians/comments/4k92a5/how_did_soviet_leaders_view_the_watergate/"
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21eybd | How is it that a 1.3 gig torrent file can support 1080i but because DVD's were inadequate blueray had to be created? | I definitely do not torrent files.
Why create blueray when a dvd has the size to easily play such a file [[1]](_URL_0_)? | askscience | http://www.reddit.com/r/askscience/comments/21eybd/how_is_it_that_a_13_gig_torrent_file_can_support/ | {
"a_id": [
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"text": [
"The codecs you'll find used for popular torrents are more lossy than the codec used for Blu-Ray. For videos with equal resolutions, the smaller one will have a lower bitrate, which can mean more compression artifacts, less color accuracy/depth, a... | [] | [
"https://en.wikipedia.org/wiki/DVD"
] | [
[]
] | |
11itmz | what's the joke behind r/circlejerk now only allowing gawker links? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/11itmz/whats_the_joke_behind_rcirclejerk_now_only/ | {
"a_id": [
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"text": [
"A guy on Gawker published violentacrez's real name, which caused a lot of subreddits to ban all Gawker links."
]
} | [] | [] | [
[]
] | ||
66ik4b | how do employees of marijuana dispensaries in the us handle their taxes if their income is based off the sale of marijuana? | With the federal restrictions affecting how dispensaries due business (such as not being able to have bank accounts), how do its employees handle their taxes when the income is coming from the sale of marijuana?
edit: thanks for the all the replies, I think I was coming from the idea of what would happen if someone ha... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/66ik4b/eli5_how_do_employees_of_marijuana_dispensaries/ | {
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"The same way anyo... | [] | [] | [
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3lt47n | why in many nations some people want civil unions on top of state-sanctioned marriages? what are the differences supposed to be? | At least here in the EU, in many nations domestic-partnership/civil-unions are offered in many states and are asked for by a large share of the population in other ones. However, in all these nations non-religious statal marriages are present, which carry no religious background whatsoever. Just a 10 minutes signing of... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3lt47n/eli5why_in_many_nations_some_people_want_civil/ | {
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"text": [
"Because marriage carries certain connotations that people may not want. \n\nYou said that you can get not religious marriages, but marriages are still viewed as being explicitly religious to a vast majority of people, so it ... | [] | [] | [
[],
[]
] | |
3lrklz | Can a white dwarf gain material and become a neutron star? | Title | askscience | https://www.reddit.com/r/askscience/comments/3lrklz/can_a_white_dwarf_gain_material_and_become_a/ | {
"a_id": [
"cv8tqc4"
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"text": [
"That's what leads to one kind of supernova: the star gains enough mass from a companion star to collapse into a neutron star - or rather, it would if it didn't go supernova in that instant.\n\nThe problem is that a white dwarf consists of carbon ... | [] | [] | [
[]
] | |
djbapk | vector graphics | I understand that the beam is manipulated directly, and that’s what makes it different from raster, but I don’t understand how that would work or why it works and how it knows what order to do things in or why it requires different hardware or anything. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/djbapk/eli5_vector_graphics/ | {
"a_id": [
"f43cay4",
"f43jym8"
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"score": [
3,
2
],
"text": [
"Do you mean the old oscilloscope-style vector graphics or the modern of vector graphics?",
"Classic vector graphics uses a Cathode Ray Tube - an electron beam is controlled by electromagnets onto a phosphorous target. Th... | [] | [] | [
[],
[]
] | |
67uw3l | why newly discovered stars or planets or any celestial bodies were given "code-like" name? for example wise 1828+2650 | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/67uw3l/eli5_why_newly_discovered_stars_or_planets_or_any/ | {
"a_id": [
"dgtecf4",
"dgtegqq",
"dgtek76"
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"score": [
2,
6,
2
],
"text": [
"As opposed to?\n\nThere are thousands upon thousands of celestial bodies discovered outside of our solar system each year. Giving them all unique names is hard if you're going to give them memorable nam... | [] | [] | [
[],
[],
[]
] | ||
a8xza3 | how do live football field graphics appear beneath the players? | You know when it shows the scrimmage lines or whatever right on the field? I assume the graphics are already using pan/tilt/zoom data from the cameras, since it looks a lot stabler than simply motion tracking (please correct me if I'm wrong on that), but what really baffles me is how the graphics appear "beneath" the p... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a8xza3/eli5_how_do_live_football_field_graphics_appear/ | {
"a_id": [
"ecetmuv",
"eceytfi"
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"score": [
51,
8
],
"text": [
"You had the right idea already. It is indeed chroma key. The cameras are simply good enough that they can distinguish between the green of the grass and the green in uniforms. They actually need to continually reset the chr... | [] | [] | [
[],
[]
] | |
3gnnft | Historians of Reddit, during the time of slavery in the USA, (or slavery in any country/civilization) was there anything that was frowned upon from one slave owner to another? | I recently watched Django, and in the dinner scene, LeoCaps says that "Under Mississippi law she is my property, and I can do anything I want with my property". Im wondering if there were any limits to this, and if there weren't, what was considered a no-no back then.
Thanks | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3gnnft/historians_of_reddit_during_the_time_of_slavery/ | {
"a_id": [
"cu02wxi"
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"score": [
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"text": [
"In early 19th-century North Carolina judicial opinion about this question, of the limits of a master's authority over his slaves, was largely divided in two. While several judges were reluctant to admit that a slave had any rights whatsoever, ot... | [] | [] | [
[]
] | |
4otvmf | how exactly did they calculate age during the old testament? | I know they didn't actually live for hundreds of years, so how exactly did they count age then? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4otvmf/eli5_how_exactly_did_they_calculate_age_during/ | {
"a_id": [
"d4fgxz7",
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"score": [
7,
15,
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"text": [
"They actually did calculate time the same. Religious people will state that the dates are fully accurate and they did live that long, those that believe it is figurative believe that artificially infla... | [] | [] | [
[],
[],
[]
] | |
2iv48r | why is it that a person can't take a large amount of over the counter pain relievers, like tylenol or ibuprofen, to get the same effects as stronger pain killers like vicodin or hydrocodone? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2iv48r/eli5_why_is_it_that_a_person_cant_take_a_large/ | {
"a_id": [
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"text": [
"Opiates like hydrocodone have an entirely different mechanism of action than ibuprofen or Tylenol. No amount of ibuprofen or Tylenol is going to effect the ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
6o12pa | Why, in a history point of view, is Germany called Allemagne/Alemania in latin languages, Germany in English and Deutschland in German | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6o12pa/why_in_a_history_point_of_view_is_germany_called/ | {
"a_id": [
"dkdruem",
"dkdujqx",
"dke7ewf"
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"score": [
3,
15,
3
],
"text": [
"On that note, why is it \"Niemcy\" or some derivative in most slavic languages?",
"The name *Deutschland* (German) and other similar names (like *Duitsland* in Dutch and *Tyskland* in Danish) is de... | [] | [] | [
[],
[],
[
"https://www.reddit.com/r/AskHistorians/comments/6lw1p3/why_is_germany_spelled_so_differently_in_many/"
]
] | ||
4vstfq | Do individual atoms move in the wind? | Is wind like a pressure wave where the energy moves or do the individual molecules move?
Something like convection or conduction | askscience | https://www.reddit.com/r/askscience/comments/4vstfq/do_individual_atoms_move_in_the_wind/ | {
"a_id": [
"d62shrf"
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2
],
"text": [
"Wind is convection that is caused by weather and the sun. The actual air molecules are moving around due to the interaction between pockets of air having different qualities and the heating/cooling of the surface of the Earth throughout the night... | [] | [] | [
[]
] | |
206snc | why humans are born with parts we can live without (appendix, wisdom teeth, male nipples, etc) | I'm particularly confused about the ones that usually cause us more harm than good, like the appendix and wisdom teeth. Why are these not removed through evolution over time? Will they ever be? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/206snc/eli5_why_humans_are_born_with_parts_we_can_live/ | {
"a_id": [
"cg0b11w",
"cg0chdk",
"cg0mqyo"
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"score": [
8,
2,
2
],
"text": [
"Evolution doesn't craft a perfect organism from scratch, it has to work with the parts it had from the previous iterations.\n\nSometimes useless pieces get left in because there's no real reason to remo... | [] | [] | [
[],
[],
[]
] | |
64vy9i | How does premature birth affect development throughout life (epigenetics?) | I was born two months premature, and at face value Im a pretty normal and fit guy, though I have atrocious ADD, I've never been the quickest on my feet in a conversation, and my personality feels a bit "cold". I don't feel I have any defects, but my joints do feel a bit "loose", for lack of a better word.
I never rea... | askscience | https://www.reddit.com/r/askscience/comments/64vy9i/how_does_premature_birth_affect_development/ | {
"a_id": [
"dg63m9s"
],
"score": [
5
],
"text": [
"First of all be aware of correlation and causation - your ADD may or may not be related to premature birth. \n\nSecondly, epigenetics usually refers specifically to traits that occur due to chemical modifications of DNA that don't involve a chang... | [] | [] | [
[]
] | |
13l56g | how does spilled water left alone dry at room temperature? | ELI5 How does spilled water which has been left alone dry at room temperature? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/13l56g/eli5_how_does_spilled_water_left_alone_dry_at/ | {
"a_id": [
"c74wsa5",
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"score": [
2,
5,
2
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"text": [
"Water doesn't go into gaseous phase _only_ at boiling temperature. Evaporation can occur because at any given temperature, there will be _some_ water molecules with enough energy to go into gaseous phas... | [] | [] | [
[],
[],
[]
] | |
22rjac | How were the christian kingdoms in the iberia able to beat back such a dominant muslim force ? | When i see a picture of the kingdom of Asturias in 790 i cant help but wonder how they drove back such a dominant force. Especially when i think about how small the christian kingdoms were in contrast to the muslim ones. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/22rjac/how_were_the_christian_kingdoms_in_the_iberia/ | {
"a_id": [
"cgpufur"
],
"score": [
13
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"text": [
"Note that this isn't an answer to the whole scope of your question, but only for a certain period of the whole Reconquista.\n\nBy 1009, [Spain was divided between Al-Andalus and the christian Kingdoms (León, Pamplona, Aragón and the Coumty of Ba... | [] | [] | [
[
"https://upload.wikimedia.org/wikipedia/commons/0/0f/Leon_1030.png"
]
] | |
vb532 | Hypothetically, if we could blow Venus out further from the sun, could it harbor life? | askscience | http://www.reddit.com/r/askscience/comments/vb532/hypothetically_if_we_could_blow_venus_out_further/ | {
"a_id": [
"c52x70c",
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3,
3
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"text": [
"Isnt the main problem with Venus the fact that its atmosphere is so thick and made up largely of greenhouse gases? So even if we somehow blew Venus out into the habitable zone, we would still need to introduce micro-organism... | [] | [] | [
[],
[
"http://qntm.org/moving"
]
] | ||
rycff | Helicobacter pylori? | Why did the name of Campylobacter pyloridis change to Helicobacter pylori? | askscience | http://www.reddit.com/r/askscience/comments/rycff/helicobacter_pylori/ | {
"a_id": [
"c49m2gf"
],
"score": [
3
],
"text": [
"In 1989, RNA sequencing showed that it did not belong in the *Campylobacter* genus, so it was placed in its own genus, *Helicobacter*.\n\n[Source](_URL_0_)"
]
} | [] | [] | [
[
"http://en.wikipedia.org/wiki/Helicobacter_pylori#History"
]
] | |
3dneft | Did Catholic Kings and Emperors go to confession? Do we know what they might have confessed, or if they ever had to do 'Hail Marys' as punishment, and so on? | It seems like a King, believed to be the divinely appointed ruler of the earth, would be see themselves as above reproach or real sin. And what rank of priest would have the right to judge their acts and assign punishment? Only a peer could do such a thing I would think. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3dneft/did_catholic_kings_and_emperors_go_to_confession/ | {
"a_id": [
"ct6v3n0",
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"score": [
104,
7
],
"text": [
"Medieval kings and emperors were very much obliged to go to confession and perform penance as needed. They were baptized and thus members of the Christian community bound to receive all the sacraments the laity received. T... | [] | [] | [
[],
[]
] | |
9va0f6 | Where did the traditional image of Cleopatra come from? | Everyone recognizes the standard image of Cleopatra. Short black hair, bangs, sleeveless white dress with gold jewelry... my question is where did this image originate, how accurate is it, and has it changed through the years? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9va0f6/where_did_the_traditional_image_of_cleopatra_come/ | {
"a_id": [
"e9wyqvd"
],
"score": [
2
],
"text": [
"Not to discourage any further answers but you'll probably enjoy these older posts by /u/cleopatra_philopater:\n\n[Most people see Cleopatra as an Egyptian, but she was actually Greek. What is her real story and how did we come to the legends abou... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/88kk50/cleopatra_gives_rare_insider_look_at_her_fashion/dwlga9q/?utm_content=permalink&utm_medium=user&utm_source=reddit&utm_name=frontpage",
"https://www.reddit.com/r/AskHistorians/comments/66vomz/most_people_see_cleopatra_as_an_egyptian_but_sh... | |
6mvrgl | What happens to family surnames when someone horrible becomes associated with it i.e Hitler? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6mvrgl/what_happens_to_family_surnames_when_someone/ | {
"a_id": [
"dk4va8c"
],
"score": [
2
],
"text": [
"Regarding the 'Hitler' last name at least, you should check out [this thread](_URL_0_)."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/39h72v/how_common_was_the_last_name_hitler_prior_to/"
]
] | |
xf67q | how do they name guns and what do the numbers at the end of the names mean? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/xf67q/eli5_how_do_they_name_guns_and_what_do_the/ | {
"a_id": [
"c5ltaip"
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"score": [
2
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"text": [
"It depends. Some examples:\n\nWinchester 94AE (rifle)\nWinchester is the manufacturer, gun design patented in 1894 ('94). AE stands for \"angle eject\", allowing the shooter to mount an optic on top of the rifle\n\nGlock 17 (pistol)\n\nNamed af... | [] | [] | [
[]
] | ||
2rhxfp | How are we able to know of the existence of exoplanets and even categorize them as "Earth-like" when we barely have images of Pluto in our Solar System? | Title is essentially the question, but as far as I know, [this](_URL_0_) is all we have until New Horizons reaches Pluto this year. How is it possible for us to know the chemical makeup of exoplanets and whether or not they are Earth like, or even know of their existence, when we barely have images of Pluto? | askscience | http://www.reddit.com/r/askscience/comments/2rhxfp/how_are_we_able_to_know_of_the_existence_of/ | {
"a_id": [
"cng7jrf"
],
"score": [
3
],
"text": [
"Its all about light wave frequency, when the planet moves in front of a star it is orbiting the light we see reflected off the surface of the plant gives off certain frequencies, which gives us an idea of its chemical make up. Also the relative p... | [] | [
"http://www.nasa.gov/mission_pages/hubble/science/pluto-20100204.html"
] | [
[]
] | |
2r1qrl | If we can only see 3 dimensions how do we know theres 10? | askscience | http://www.reddit.com/r/askscience/comments/2r1qrl/if_we_can_only_see_3_dimensions_how_do_we_know/ | {
"a_id": [
"cnc5tvb",
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"score": [
2,
2,
2
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"text": [
"A problem with this question is that it's not clear what 'dimension' means in a physical sense. If lots of people look at something unfamiliar, do you think they'll agree about whether something is a d... | [] | [] | [
[
"http://en.wikipedia.org/wiki/String_theory#Extra_dimensions",
"http://en.wikipedia.org/wiki/Adiabatic_index#Relation_with_degrees_of_freedom"
],
[],
[]
] | ||
e378h7 | Did Athenian males have to complete mandatory military service time? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/e378h7/did_athenian_males_have_to_complete_mandatory/ | {
"a_id": [
"f92djrh"
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"score": [
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"text": [
"There are two answers to the question, depending on what you mean by \"mandatory military service time\".\n\nIf you mean to ask whether all Athenian citizens in the Classical period were liable to military service, the answer is yes. When a male ... | [] | [] | [
[]
] | ||
1flhjm | What did Japan know about the outside world before European contact? | Did their isolationist policies result in a view of foreigners based on rumor and hearsay? How far did their maps go? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1flhjm/what_did_japan_know_about_the_outside_world/ | {
"a_id": [
"cabkege"
],
"score": [
6
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"text": [
"Japan became really isolationist only after European contact, and during the whole sakoku period (1633-1853), there was still contact with the Dutch, Chinese, Ryūkyū Kingdom (present day Okinawa) and Korea, so they got information on the world f... | [] | [] | [
[
"http://en.wikipedia.org/wiki/File:Wokou.jpg"
]
] | |
168bcp | What has changed about the way Western parents would name their children? As we go back in time, are names given based on meaning? | I live in the United States, and it seems to me that the majority of people either name their children after someone important to them, or that they simply like the sound of the name. It also seems that knowing the meaning of a name isn't significant. I couldn't recall the meaning of someone's name off the top of my he... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/168bcp/what_has_changed_about_the_way_western_parents/ | {
"a_id": [
"c7tocmb",
"c7tospc",
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"score": [
3,
3,
3
],
"text": [
"Giving names based on meaning is still very much in practices in the Middle-East and South Asia. Even when people are named after others, the meaning of the name is still known. For example: Muhammad me... | [] | [] | [
[],
[],
[]
] | |
6z1c0s | why are the recommend servings written on food so little? | For example, a medium bag of chips has five recommended servings. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6z1c0s/eli5why_are_the_recommend_servings_written_on/ | {
"a_id": [
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"score": [
9,
2,
14
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"text": [
"People see a small bag or box and assume it is one serving, but the manufacturer knows that if you saw the total calories/sodium/cholesterol you wouldn't eat it so they make it multiple servings so the... | [] | [] | [
[],
[],
[]
] | |
49dq17 | Where battles in the middle ages just as chaotic as they seem in the movies? | Just a mass of people fighting each other? How did they choose who to fight? There must have been a lot of mistakes where soldiers would kill their comrades if that's the case.
Edit: WERE* | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/49dq17/where_battles_in_the_middle_ages_just_as_chaotic/ | {
"a_id": [
"d0rcxed"
],
"score": [
22
],
"text": [
"See [here](_URL_0_) for a recent post of mine on this subject. The article linked ITT by /u/Silver_Agocchie is also useful, and cites extensively from Phil Sabin's \"The Face of Roman Battle\" (*Journal of Roman Studies* 90 (2000) 1-17) which is... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/48pumt/did_the_people_in_the_front_lines_of_ancient/"
]
] | |
363z9y | how are restaurants able to keep soda carbonated and ready to serve? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/363z9y/eli5_how_are_restaurants_able_to_keep_soda/ | {
"a_id": [
"crai0on",
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"score": [
3,
2
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"text": [
"They don't. Inside the soda machine are containers of syrup and a tank of compressed CO2. The two are mixed together at the time the drink is dispensed. On a small/home scale, you can look at a SodaStream system to see how i... | [] | [] | [
[],
[]
] | ||
1lh69p | If I shut a plastic bottle full of tap water, how long will it take for the water not to be safe to drink? | I know algae, fungi and bacterial will enter the water just from contact with the air. I am trying to settle a debate with a friend over whether or not the water will be safe to drink. Will the bottle itself degrade before the organisms have grown noticeably? Will the growth of organisms only take place over a few days... | askscience | http://www.reddit.com/r/askscience/comments/1lh69p/if_i_shut_a_plastic_bottle_full_of_tap_water_how/ | {
"a_id": [
"cbz9ghn"
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"score": [
3
],
"text": [
"Assuming the bottle of water has never been opened after factory production, bacteria are not an issue.\n\nWhen it comes to the degradation of the plastic (Polyethylene), two substances may contaminate the water. The first one is acetaldehyde, wh... | [] | [] | [
[]
] | |
1gu2b4 | why are interest rates set by the fed and not the banks making the loans? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1gu2b4/eli5_why_are_interest_rates_set_by_the_fed_and/ | {
"a_id": [
"canterx"
],
"score": [
3
],
"text": [
"The Fed does not set interest rates. That is done by the market itself. The Fed sets the rate for bank to bank loans that fall under Federal regulations. The Fed rate does have some effect on what banks charge in interest (especially long term an... | [] | [] | [
[]
] | ||
1deyp4 | my rent keeps going up but my salary does not, what is the societal expectation or gain? | Are poorer people supposed to move out every few years so the wealthy can move in? Is this some sort of "step" in gentrification? What happens when all the neighborhoods are gentrified?
EDIT: I worded headline poorly. My bad. TIL: there will always be poor people and we will always live somewhere- not gonna fret about ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1deyp4/eli5_my_rent_keeps_going_up_but_my_salary_does/ | {
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"score": [
22,
3,
64,
2,
2,
2,
2,
2,
3,
3
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"text": [
"It's not like someone's specifically planning ... | [] | [] | [
[],
[],
[],
[],
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88tnwr | Does the moon/sun's gravitational pull affect how high I can jump height on earth? | The moon and sun have effects on gravity on earth, which can be seen with the tides, human physiology, and more. My question is if the pull of the moon and sun have enough of an effect on the gravitational acceleration here on earth that I could be able to jump slightly higher when the moon/sun are overhead than when t... | askscience | https://www.reddit.com/r/askscience/comments/88tnwr/does_the_moonsuns_gravitational_pull_affect_how/ | {
"a_id": [
"dwnkrvn",
"dwnza1i"
],
"score": [
3,
6
],
"text": [
"There is a very very weak effect called the Earth Tide (similar to the more familiar water tide) which is mainly due to the moon and the sun reshaping the Earth as they orbit it and modifying its gravitational field slightly... | [] | [] | [
[],
[]
] | |
3swiqg | Why were public executions considered entertainment in for the longest time? | Whenever I hear of an execution in history on TV or in a podcast, it always seemed like a bit of a spectacle. Something you could even bring your family to. Was it always like this? Was there resistance to this idea? Anyone who thought that it was wrong to have public executions? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3swiqg/why_were_public_executions_considered/ | {
"a_id": [
"cx1k03b",
"cx1n26v"
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"score": [
3,
2
],
"text": [
"The initial reason for public executions- as well as any cruel and unusual punishment- was that it was supposed to impress upon all, especially criminals, the awful consequences of crime. Displaying the bodies, or even just... | [] | [] | [
[
"http://www.exclassics.com/newgate/ng481.htm",
"http://www.capitalpunishmentuk.org/endpublic.html"
],
[
"https://www.reddit.com/r/AskHistorians/comments/28tv6l/what_is_this_wheel_on_a_pole_with_corpse_that_i/",
"https://www.reddit.com/r/AskHistorians/comments/2quk3r/how_were_executioners_viewe... | |
5o213b | what are the differences between a condo, townhouse, and apartment? | What classifies a townhouse as a townhouse, condo as a condo, etc? They all seem to have similar qualities/features. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5o213b/eli5_what_are_the_differences_between_a_condo/ | {
"a_id": [
"dcg1mlu",
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"dcg60oa",
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"score": [
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34,
61,
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"text": [
"In most of the U.S. in standard American English, an apartment means something designed for renters, while condos and townhomes are designed for homeowners.\n\nThere are exceptio... | [] | [] | [
[],
[],
[],
[]
] | |
50s2le | the difference between local banks, national banks, credit unions, etc and why should i care? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/50s2le/eli5_the_difference_between_local_banks_national/ | {
"a_id": [
"d76kgy3"
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"score": [
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"text": [
"Generally, anyone can open an account at local or national banks. If you travel, it will be easier to get more cash from your accounts/find a bank/atm if they are with a larger chain. Think about it like your favorite local restaurant vs McDonald... | [] | [] | [
[]
] | ||
o8jp4 | How are extraordinarily high temperatures contained/dissipated ? | Take the [Z-Machine](_URL_0_) for example. How do you contain 6.6 billion degree temperatures? I feel like it would melt nearly anything in an instant. What materials would be needed to create a heatsink that could deal with those incredible temperatures? | askscience | http://www.reddit.com/r/askscience/comments/o8jp4/how_are_extraordinarily_high_temperatures/ | {
"a_id": [
"c3f8jpx",
"c3f8rnx"
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"score": [
3,
3
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"text": [
" > How do you contain 6.6 billion degree temperatures?\n\nNot to hijack your question, but this got me thinking: is there an \"upper limit\" for temperature? ",
"These things are generally confined by magnetic fields in... | [] | [
"http://en.wikipedia.org/wiki/Z_machine"
] | [
[],
[]
] | |
55cwlr | how do certain types of music sound good to some and unbearable to others? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/55cwlr/eli5_how_do_certain_types_of_music_sound_good_to/ | {
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"score": [
14,
7,
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"text": [
"What you're really asking is, why is aesthetic subjective?",
"Well, there's a psychological thing where the more you're exposed to something the more you like it (in general).... | [] | [] | [
[],
[],
[],
[]
] | ||
ahcixb | why must my car be a "sauna" in winter, or else my windows are all fogged over with zero visibility? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ahcixb/eli5_why_must_my_car_be_a_sauna_in_winter_or_else/ | {
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"eeduy1t",
"eegyjbe"
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"score": [
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"text": [
"Humidity in your car will precipitate out onto your window (like dew) because the window is almost as cold as the outside. By heating up the air you increase ... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
116jqd | how do aircraft manufacturers deliver smaller planes (that cannot fly across the ocean ) to other continents ? | I hear Boeing sells a lot of 737s. How do they get them to customers in places like Europe and Asia, which would require flying over oceans that may be beyond their range ? I'm guessing they could ship them by sea ( inefficient due to wingspan ), assemble them on site, use add-on fuel tanks to extend their range, or ma... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/116jqd/eli5_how_do_aircraft_manufacturers_deliver/ | {
"a_id": [
"c6k0hf9"
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"score": [
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"text": [
"1. Ranges for passenger aircraft have large safety margins\n2. Not having cargo, passengers, or even an interior increases range\n3. Flying from Newfoundland to Iceland is about the same as flying from Denver to New York"
]
} | [] | [] | [
[]
] | |
1l7n48 | If Jupiter has so much mass, why is it still a gas planet and not a solid?? | askscience | http://www.reddit.com/r/askscience/comments/1l7n48/if_jupiter_has_so_much_mass_why_is_it_still_a_gas/ | {
"a_id": [
"cbwlbek",
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"score": [
9,
5
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"text": [
" > If Jupiter has so much mass, why is it still a gas planet and not a solid??\n\nBecause most of the material of which it is made is has low atomic mass and high vapor pressure. The rocky planets farther in (including Eart... | [] | [] | [
[],
[]
] | ||
170phl | do chefs have to like the food they cook? | For instance: if a chef hates eating asparagus but has to cook something with it for a menu item. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/170phl/eli5_do_chefs_have_to_like_the_food_they_cook/ | {
"a_id": [
"c8154ux"
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"score": [
2
],
"text": [
"They don't have to like it, but they should be able to appreciate what others like in it, so they can make cooking decisions that reflect those tastes."
]
} | [] | [] | [
[]
] | |
bywwrx | how is it possible that extinct species are "brought back to life"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bywwrx/eli5_how_is_it_possible_that_extinct_species_are/ | {
"a_id": [
"eqmu4pi",
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"score": [
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"text": [
"Outside of science fiction movies, it isn't currently possible. Theoretically, you could use cloning methods to insert DNA from an extinct species into the egg of a existing close relative.",
"Essentially, it works the s... | [] | [] | [
[],
[
"https://www.sciencedirect.com/science/article/pii/S0093691X08007784?via%3Dihub",
"https://www.nationalgeographic.com/science/2009/02/news-bucardo-pyrenean-ibex-deextinction-cloning/",
"https://images.csmonitor.com/csm/2015/10/938806_1_ibex_standard.jpg?alias=standard_900x600nc"
]
] | ||
1n10ab | When a car (in movement) hits a stationed car (same type) face to face, will the damages on each car be different? | My first intuition would be NO. But I know nothing on momentum in physics. | askscience | http://www.reddit.com/r/askscience/comments/1n10ab/when_a_car_in_movement_hits_a_stationed_car_same/ | {
"a_id": [
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"score": [
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"text": [
"I have read the replies, and I feel I should mention the car in motion will have an engine, transmission, and tires/wheels that more in motion. It might not be much different, but certainly the wheels/tires will have angular momentum much differe... | [] | [] | [
[]
] | |
24q3ln | Did past (before 1800s) heads of state visit other nations, for whatever reason, like heads of state do today? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/24q3ln/did_past_before_1800s_heads_of_state_visit_other/ | {
"a_id": [
"ch9olpt",
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"score": [
7,
2,
3
],
"text": [
"Sigurd I, King of Norway has his journeys chronicled in the [Heimskringla](_URL_0_). While he campaigned in Palestine, he spent many years journeying to and from the Holy Land as a guest of various king... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Heimskringla"
],
[],
[]
] | ||
1j8j7n | Why did WW2 ruin the economy of the British Empire but revitalize that of the United States? | Or is that too simplistic a description? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1j8j7n/why_did_ww2_ruin_the_economy_of_the_british/ | {
"a_id": [
"cbc7yzu",
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"score": [
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27,
4,
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"text": [
"This is an incredibly complicated question because there are so many factors involved. Even prior to American \"involvement,\" American agriculture and industry underwent rapid ex... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/Attlee_ministry",
"https://en.wikipedia.org/wiki/Anglo-American_loan"
],
[]
] | |
37x5q8 | Was Alaska considered a colony by the Russians? And if so, then what did they produce/extract from there? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/37x5q8/was_alaska_considered_a_colony_by_the_russians/ | {
"a_id": [
"crqjxzl"
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"score": [
7
],
"text": [
"**Yes. Furs.**\n\nThrough the end of the Russian era, the principal product of Russian America (Alaska) was the fur trade. Of paramount value were sea otters, and the Russian-American Company traveled across the Pacific Ocean in pursuit of these ... | [] | [] | [
[]
] | ||
b16kci | the idea of silver/gold/platinum | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b16kci/eli5_the_idea_of_silvergoldplatinum/ | {
"a_id": [
"eijmjdx"
],
"score": [
5
],
"text": [
"Reddit gets money, poster gets a false sense of achievement, and the giver gets to feel good about themselves for spending money "
]
} | [] | [] | [
[]
] | ||
4ucwqf | why do flies gather around the eyes of cows and horses but not around human eyes? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ucwqf/eli5_why_do_flies_gather_around_the_eyes_of_cows/ | {
"a_id": [
"d5oo0ed",
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"score": [
6,
5
],
"text": [
"We have hands to rub excess mucus away and prevent buildup of globs of it in which bacteria could turn that lovely eye snot into a super cheesecake for flies. Cows and horses cannot do this so they have essentially fly dinne... | [] | [] | [
[],
[
"https://www.researchgate.net/profile/Jaya_Chidambaram/publication/8558359/figure/fig1/AS:280029364801545@1443775611763/Figure-1-Moisture-seeking-Musca-sorbens-flies-congregate-around-the-eyes-of-an-Ethiopian.png"
]
] | ||
3lbc2w | do euro countries still keep track of there old currencies? why or why not? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3lbc2w/eli5_do_euro_countries_still_keep_track_of_there/ | {
"a_id": [
"cv4sdsm",
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"score": [
3,
3
],
"text": [
"what do you mean? do european countrys that are in EU and use euros as official currency keep the tract of the previous currency they used? the answer is no becouse you cant keep track of somthing that no longer exists.",
... | [] | [] | [
[],
[]
] | ||
68ntu2 | What is the prevailing opinion on "Why the West Rules... For Now" here on AskHistorians? | (An RE-POST of my previous question to see if Monday gives me better luck!) I just finished reading "Why the West Rules... For Now" and found it both interesting and troubling. I decided to pick the book thanks to the recommendation I found here on it. It was a worthwhile read, but I couldn´t shake the feeling that som... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/68ntu2/what_is_the_prevailing_opinion_on_why_the_west/ | {
"a_id": [
"dh06t53"
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"score": [
11
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"text": [
"[I liked it](_URL_0_). And I think you are misunderstanding his point at the last chapter, I don't remember him ever saying that in 2070 Germans will in unison cast Goethe into the fire in favor of Chinese novels. He does say that the lopsided c... | [] | [] | [
[
"https://www.reddit.com/r/HistoryResources/comments/y66i8/book_why_the_west_rulesfor_now_by_ian_morris/"
]
] | |
7hp0oq | How do particle accelerators sync with the particles? | When a particle accelerator like CERN is accelerating a particle how do they time the RF Cavities with the particle?
Should I change this to the engineering category? | askscience | https://www.reddit.com/r/askscience/comments/7hp0oq/how_do_particle_accelerators_sync_with_the/ | {
"a_id": [
"dqspi93",
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"score": [
8,
3
],
"text": [
"The particles are often bunched before injection into a series of accelerating cavities. So you can tune the frequency of the cavity to the desired value, and have the buncher pinch off bunches of particles in synch with the... | [] | [] | [
[
"https://cds.cern.ch/record/1982417/files/phase-stability.png"
],
[]
] | |
5pwpeq | why are some nfl teams generally better than others over extended periods of time? aren't new teams drafted every season? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5pwpeq/eli5_why_are_some_nfl_teams_generally_better_than/ | {
"a_id": [
"dcudvhq",
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"score": [
4,
2
],
"text": [
"New players are drafted not teams. The teams with the best draft strategy over several years normally end up being better. Many players that are drafted are not as good as hoped and others are better than expected. Basically... | [] | [] | [
[],
[]
] | ||
4ik2fq | What's the origin of Irish gypsies/ travellers and do they have any relation to Romani gypsies? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4ik2fq/whats_the_origin_of_irish_gypsies_travellers_and/ | {
"a_id": [
"d2z125a"
],
"score": [
79
],
"text": [
"A very good question that—would that I had a better answer for it.\n\nI have had little cause to study any theoretical ethnogenesis, unfortunately. I *can* tell you Traveller origins are not well understood, with many competing hypotheses; rangi... | [] | [] | [
[
"https://www.youtube.com/watch?v=vrdrQpJIm-M",
"http://www.itma.ie/itmashop/product/songs-of-the-irish-travellers"
]
] | ||
1e1hy8 | How many mechanisms are there in the brain that induce sleepiness? | I'm curious about how receptors the brain has that induce sleepiness. For example, taking narcotics make some people sleepy, but that can release histamine, but at then again, taking an anti-histamine (like Benadryl) also makes some people sleepy. Further, taking Ambien for an extended amount of time doesn't seem have ... | askscience | http://www.reddit.com/r/askscience/comments/1e1hy8/how_many_mechanisms_are_there_in_the_brain_that/ | {
"a_id": [
"c9wwx2b"
],
"score": [
2
],
"text": [
"Free adenosine's the major endogenous signalling molecule. As an organism stays awake, levels increase and this makes you sleepy. Caffiene is an antagonist at this receptor, hence why it makes you less sleepy.\n\nAmbien's an agonist at GABA, simi... | [] | [] | [
[]
] | |
2kupzo | How do irregularities (such as sunspots) develop in the Sun? | The Sun is so massive, shouldn't it be roughly uniform rotationally? | askscience | http://www.reddit.com/r/askscience/comments/2kupzo/how_do_irregularities_such_as_sunspots_develop_in/ | {
"a_id": [
"clp7zi1"
],
"score": [
2
],
"text": [
"The cause of sun spots is due to the charged surface of the sun swirling around and allowing a magnetic field to be created similar to [eddy currents](_URL_0_). Each sun spot is produced in pairs and when these pairs come into contact with one an... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Eddy_current",
"http://en.wikipedia.org/wiki/Coronal_mass_ejection",
"http://en.wikipedia.org/wiki/Magnetic_reconnection"
]
] | |
17j43c | How was Trudeau compared to Mulroney, more beneficial to Canada? | Canadian History
In other words, how was Trudeau being very beneficial to Canada?
Also, how was Mulroney not being beneifical to Canada? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17j43c/how_was_trudeau_compared_to_mulroney_more/ | {
"a_id": [
"c860w3j",
"c8620vx",
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"score": [
3,
5,
7,
6
],
"text": [
"This seems like a very difficult question to answer, since \"beneficial\" is such a difficult to measure term. I can't really answer this question, but can you specify what you mea... | [] | [] | [
[],
[
"http://www.law.ubc.ca/files/pdf/enlaw/primer_complete_05_10_09.pdf"
],
[],
[
"http://www.reddit.com/r/askmath/comments/16sars/need_help_with_parabolas_please/"
]
] | |
42hprk | what is the format of the afl/nfl from the start of season to the superbowl? | I'm European and I know of the terms AFL/NFL/SuperBowl but that's about it.
When I say format I referring to teams in each/no. of games/is progression to SuperBowl based on wins or points? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/42hprk/eli5_what_is_the_format_of_the_aflnfl_from_the/ | {
"a_id": [
"czaengm"
],
"score": [
5
],
"text": [
"AFL isn't a thing anymore; it merged with the NFL many years ago.\n\nThere's a preseason, but results there don't affect a team's progression. The season proper starts with the \"regular season.\" Each of the 32 teams plays 16 games over a 17-wee... | [] | [] | [
[]
] | |
dpriy4 | what are raw photos? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dpriy4/eli5_what_are_raw_photos/ | {
"a_id": [
"f5xtnj2",
"f5xu4uy",
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"score": [
4,
3,
7,
2
],
"text": [
"Some cameras can give you both RAW and JPG photos. JPG photos are processed in the camera and give you a jpg file afterwards. RAW files are much larger because they contain much mo... | [] | [] | [
[],
[],
[],
[]
] | ||
hs86p | What can politicians do to help scientists? | I ask because my future career will involve politics(one way or another), being my father and his father before him both were state representatives I will most likely follow in their footsteps but going further than they had. I've had the luck being born in this time period and seeing(reading as well) such inspirationa... | askscience | http://www.reddit.com/r/askscience/comments/hs86p/what_can_politicians_do_to_help_scientists/ | {
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"c1xx5g6",
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"c1xzw85",
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"c1y03mg",
"c1y196k",
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"c1y4xwe"
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"score": [
41,
22,
18,
8,
5,
3,
4,
16,
3,
4,
6... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"http://www.childrensmercy.org/stats/journal/oddsratio.asp"
],
[
"http://scienceblogs.com/insolence/2011/06/more_abuse_of_science_for_political_pand.php"
],
[]
] | |
1bdn5l | what is the benefit of having the large hadron collidor? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1bdn5l/eli5_what_is_the_benefit_of_having_the_large/ | {
"a_id": [
"c95x10y",
"c95x150"
],
"score": [
3,
2
],
"text": [
"Scientific understanding is it own benefit. Other benefits will follow once the science is better understood. \n\nNo scientist working on all the underlying physics thought about medical imaging technology at the time, but y... | [] | [] | [
[],
[]
] | ||
4dlsfx | why are the lights inside buildings, skyscrapers, etc... always on at night? are they actually used by people or is the a requirement to make the night skyline look good? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4dlsfx/eli5_why_are_the_lights_inside_buildings/ | {
"a_id": [
"d1s39dy",
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"d1s41h6",
"d1s7nlv",
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"score": [
5,
2,
2,
2,
2
],
"text": [
"They aren't always on. However yes many of the buildings are still used by people at night. Cleaning crews. Security. Renovations. People just working late. E... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
2jnqzb | My Great Grandfather was killed in WW1. | My great grandfather was an American who went to Canada to enlist in the Canadian Army. He died just a few days before Armistice. My grandmother (his daughter) was 10 when he died. She never got over it. She couldn't watch war movies all her life. I want to know where in France he died, what battle was being fough... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2jnqzb/my_great_grandfather_was_killed_in_ww1/ | {
"a_id": [
"cldeyly",
"cldf0lt",
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"cldn25d",
"cldnlso"
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"score": [
27,
6,
18,
2,
2,
9,
3
],
"text": [
"I was able to find a letter he wrote, dated August 31st, 1918. I'm not an expert on battles but if it helps anyo... | [] | [
"ancestry.com"
] | [
[],
[],
[
"http://imgur.com/msr0qqS",
"http://imgur.com/a/FuATE",
"ancestry.com",
"http://www.veterans.gc.ca/eng/remembrance/history/first-world-war/last-hundred-days?filter=month&month=11"
],
[],
[],
[
"http://www.reddit.com/r/wwi/comments/1n2n5h/my_great_grandfather_served_with... | |
97w3ws | Why does light bend when it refracts? | I've looked everywhere and this is driving me crazy, so hopefully someone here can help me.
I'm curious as to why light bends during refraction. I understand that when it travels from one medium to another, its speed changes, which is responsible for the refraction. What I don't understand is why this change in speed... | askscience | https://www.reddit.com/r/askscience/comments/97w3ws/why_does_light_bend_when_it_refracts/ | {
"a_id": [
"e4bkjqd",
"e4blbev"
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"score": [
15,
2
],
"text": [
"Because of two things: 1) as you say, the speed of light is different in different media and thus the wavelength must be different in different media, and 2) because energy and momentum must be conserved at an interface. As... | [] | [] | [
[
"http://blog.soton.ac.uk/soundwaves/files/2013/12/refracter.gif",
"https://en.wikipedia.org/wiki/Optical_tweezers"
],
[]
] | |
1dfp58 | When we say a chemical is odorless, do we mean that it is odorless to humans, or that it is truly odorless? | Is there even a way to know? | askscience | http://www.reddit.com/r/askscience/comments/1dfp58/when_we_say_a_chemical_is_odorless_do_we_mean/ | {
"a_id": [
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"score": [
3,
10,
4,
126,
10
],
"text": [
"Another question. Is it true that dogs can taste pure water?",
"Odor isn't an inherent property of a chemical. Talking about odor only makes sense in ... | [] | [] | [
[],
[],
[],
[],
[]
] | |
f4e9u2 | why is it bad to plug extension cords into one another? like i know it’s bad, but why? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f4e9u2/eli5_why_is_it_bad_to_plug_extension_cords_into/ | {
"a_id": [
"fhpwarz",
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"score": [
7,
2,
2
],
"text": [
"Extension cords are designed to carry a certain amount of current over a fixed distance (length of the cord). Daisy chaining cords (plugging cords together) increases this distance and thus increases t... | [] | [] | [
[],
[],
[
"http://www.m.electrical101.com/m.extension-cords.html"
]
] | |
8s2hi0 | Why did the Nazis devote resources to accelerating the Holocaust as they were losing the war? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8s2hi0/why_did_the_nazis_devote_resources_to/ | {
"a_id": [
"e0w2mth",
"e0w30as"
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"score": [
5,
42
],
"text": [
"I asked a similar question awhile back: _URL_0_\n \nThe short of it is that the Holocaust is inseparable from the Nazi's larger war goals - the Holocaust was as much of a part of the Nazi war strategy as everything else was... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/620e3a/how_much_of_a_distraction_was_the_implementation/"
],
[
"https://www.reddit.com/r/AskHistorians/comments/579kbc/what_was_the_most_deadliest_phase_of_the_holocaust/d8svlr5/"
]
] | ||
1g15l0 | Do we have any journals from Europeans were marooned at sea during the age of exploration? | Maybe got rescued and wrote about it after the fact, or they died but we found their written record.
| AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1g15l0/do_we_have_any_journals_from_europeans_were/ | {
"a_id": [
"cafss8m"
],
"score": [
4
],
"text": [
"Indeed we do, albeit the ones we do have come along towards the end of the Golden Age of Piracy. In fact, the fictional story of Robinson Crusoe is thought to be based off of the real story if Scottish buccaneer and self-inflicted castaway [Alexa... | [] | [] | [
[
"http://en.m.wikipedia.org/wiki/Alexander_Selkirk"
]
] | |
8768f6 | I am a high school student and I have a few questions for anyone that works in a field related to history. | Ever since I was young I loved history. Whether it's reading about the Cold War or looking at Ancient Greek artifacts, I have always been captivated. As college starts to approach, I must begin looking towards what I will do in the future. So, I have a few questions for anyone that has a job in the field of history/soc... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8768f6/i_am_a_high_school_student_and_i_have_a_few/ | {
"a_id": [
"dwajx3w",
"dwaujd7"
],
"score": [
2,
2
],
"text": [
"These links should not discourage further replies, but here are some recent threads, which may be of interest: \n\n_URL_0_ with answers from u/restricteddata, u/Dire88, u/alriclofgar and others \n\n_URL_4_ by u/uncovered-... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/6267u7/will_i_be_able_to_find_a_job_as_a_historian/",
"https://www.reddit.com/r/AskHistorians/wiki/theory#wiki_history_careers_and_education",
"https://www.reddit.com/r/AskHistorians/comments/6knw12/questions_from_an_aspiring_historian/",
"https://w... |
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