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 |
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1qwzx5 | chemistry behind nuclear bombs | Did some searching myself, the best I could gather was something starts a reaction that splits some molecule apart, and those two halves hit some other atoms that split them apart and so on.
Basically want to know if thats the explanation or is there more to it, and why is it best to detonate them high in the air inst... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1qwzx5/eli5chemistry_behind_nuclear_bombs/ | {
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"text": [
"As some others are saying.\n\nChemistry generally looks at the atoms, and the way they interact together. Chemical interactions primarily happen in the electron cloud around the atom.\n\nNuclear interactions are not chemistry. They happen in the ... | [] | [] | [
[]
] | |
gvrzz | Any suggestions on a good at home lab kit? | I am looking at getting an at home lab kit but I am very unsure on what one would be good. I was hoping to do some basic chemistry and physics experiments. I have a well ventilated work area available to me and have absolutely no equipment or supplies. Is there a particular kit or supply company you use that can be re... | askscience | http://www.reddit.com/r/askscience/comments/gvrzz/any_suggestions_on_a_good_at_home_lab_kit/ | {
"a_id": [
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"text": [
"[Non Expert] If you're interested in hobby chemistry, the book \"[Illustrated Guide to Home Chemistry Experiments](_URL_0_)\" seemed rather good when I had it. It has a lot of advice on where to get equipment, and how to set up your lab space."
... | [] | [] | [
[
"http://www.makershed.com/ProductDetails.asp?ProductCode=9780596514921"
]
] | |
c208uv | Do each of my chromosomes come from a specific grandparent or are they all a mix of genes from each? | I know I have 23 chromosome pairs, 23 from my mother and 23 from my father.
But is my 1st chromosome a match to one of my grandparents 1st chromosome or does it have a mix of genes from all of them?
If it's matching chromosomes, does that mean I get ~12 Maternal Grandmother Chromosomes ~11 Maternal Grandfather Chromo... | askscience | https://www.reddit.com/r/askscience/comments/c208uv/do_each_of_my_chromosomes_come_from_a_specific/ | {
"a_id": [
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"score": [
5,
11,
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],
"text": [
"Bonus questions, how does this tie into genetic tests of ancient ancestry?\n\nDoes that mean if Europeans have Neanderthal ancestry, they have some Neanderthal chromosomes, or is there a way that Nean... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Genetic_recombination"
],
[]
] | |
1115ol | Why are fuses rated in amps and not watts? | It has always been explained to me that a fuse must be rated above the voltage that that it will be used with, though how high above doesn't matter. The fuse will blow when the amp rating is exceeded. It seems to me that a 250V 10A fuse will blow with 12V 15A (180W) but not by 100V 5A (500W). Is my understanding of fus... | askscience | http://www.reddit.com/r/askscience/comments/1115ol/why_are_fuses_rated_in_amps_and_not_watts/ | {
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"text": [
"Think of voltage as the speed of water passing through a pipe in a dam (the dam is the resistance), the amps are the amount of water passing through the pipe, and the wattage is t... | [] | [] | [
[],
[],
[],
[]
] | |
dlefwh | what happens to the bodily systems when you consume too much alcohol? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dlefwh/eli5_what_happens_to_the_bodily_systems_when_you/ | {
"a_id": [
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"There are two effects: chronic (things that happen over time) and acute (things that happen right away).\n\nChronic overconsumption of alcohol can lead to liver damage, cancer, and a host of other health problems. \n\nAcute overconsumption typic... | [] | [] | [
[]
] | ||
a7yzlm | what is hadoop & spark? and how do they stack together? | I have googled it but since i have no background in data science or programming, those things just confuse me more. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a7yzlm/eli5_what_is_hadoop_spark_and_how_do_they_stack/ | {
"a_id": [
"ec759nq"
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"score": [
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"text": [
"Google published a paper describing a cluster of computers that could be used to search through very, very large amounts of data and quickly return the results found in the data. They called it MapReduce. I won't describe how that works because... | [] | [] | [
[]
] | |
2lj2vp | how does cantor's diagonal proof proves that real numbers are 'more infinite' than naturals? | I get that one can determine whether an infinite set is bigger, equal or smaller just by 'pairing up' each element of that set (using a bijective function ) with another's, and that in that way one can prove that there are as many Naturals = Integers = Even numbers, etc... All those infinities, while not having the sa... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2lj2vp/eli5_how_does_cantors_diagonal_proof_proves_that/ | {
"a_id": [
"clv969p",
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"score": [
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2,
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"text": [
"Any set with the same cardinality as the natural numbers can be written as a list\n\n1.\n\n2.\n\n3.\n\nand so on.\n\nIf you made a list of real numbers\n\n1. 0.435345356346...\n\n2. 0.234345635623...\n\... | [] | [] | [
[],
[],
[]
] | |
3fyj56 | why isn't the propellant in canned air, air cartridges, or aerosol cans just air? | It is usually always a flammable gas. Why can't they fill it from an air compressor with normal air? And why aren't pellet guns and paintball guns like this as well instead of using Co2? And according to the can, my shaving cream is using propane as a propellant. Wouldn't it be cheaper and just as affective to use air... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3fyj56/eli5_why_isnt_the_propellant_in_canned_air_air/ | {
"a_id": [
"ctt6dxb",
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"score": [
4,
4,
3
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"text": [
"Very simply: water content. Atmospheric air contains a substantial amount of water vapour. Most applications calling for a propellant are used in combination with a product or substance which must be s... | [] | [] | [
[
"http://www.aveflor.cz/aerosol_propellants.php"
],
[],
[]
] | |
2yl9if | During the Napoleonic Wars, the national debt of the United Kingdom was as high as 200% of GDP. Any nation trying to borrow that much now is unthinkable. How did the United Kingdom retain the ability to borrow so much, especially in the face of such a protracted war? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2yl9if/during_the_napoleonic_wars_the_national_debt_of/ | {
"a_id": [
"cpb99y7",
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"score": [
44,
3
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"text": [
"Pickety explains this rather well in Capitalism in the 21st Century.\n\nDuring the 19th century, inflation was more or less non-existant and interrests where stable at around 4%. \nDuring this period, most investors sought ... | [] | [] | [
[],
[]
] | ||
7eqkke | what stopped isp's from doing what people are saying they'll do now pre-2015 if we repeal nn now? why didn't they do it back then? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7eqkke/eli5_what_stopped_isps_from_doing_what_people_are/ | {
"a_id": [
"dq6ri6s",
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"score": [
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2
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"text": [
"Mostly the fact that the markets were still very much in flux, meaning they had more competition and people were more likely to switch to a different ISP if they were to limit their users' access to certain services.\n\nPlus... | [] | [] | [
[],
[]
] | ||
1q4ryc | Have there been any attempts to build a Third Temple or re-establish the priesthood for Judaism? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1q4ryc/have_there_been_any_attempts_to_build_a_third/ | {
"a_id": [
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"score": [
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19,
3,
6,
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"text": [
"I asked this question of a couple Rabbis recently, \"why not rebuild the temple after the formation of Israel?\"\n\nThey both responde... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Dome_of_the_Rock"
],
[],
[],
[
"http://www.freewebs.com/vitaphone1/history/sozomen.html#P3964_1740460",
"http://www.tertullian.org/fathers/ammianus_23_book23.htm#C1"
],
[
"http://en.wikipedia.org/wiki/Temple_Institute"
],
[]
] | ||
4sbv5h | how come it's illegal to tweet a threat but allowed in a rap song? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4sbv5h/eli5_how_come_its_illegal_to_tweet_a_threat_but/ | {
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"text": [
"There's a difference between a threat and just \"threatening language\". Threats are *specific*. Rap lyric threats are usually \"I'll crack your fuckin skull and use it as a bowl of cereal\" and shit like that. Rarely is ... | [] | [] | [
[],
[]
] | ||
1jlja6 | could somebody explain how irc chat clients work? what is freenode? and how do i search for unlisted channel topics that i'm interested in? | I have been looking for a comprehensive guide for beginners and I have no networking background everything seems to be about server this proxy that. How Do I make IRC easy? Is there a client that's just very minimal opens chat room text in almost a terminal-like minimalism? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jlja6/could_somebody_explain_how_irc_chat_clients_work/ | {
"a_id": [
"cbfyrn5",
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"score": [
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2
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"text": [
"What operating system are you running? Something graphical will be much more intuitive if you're just starting out.\n\nFor windows: _URL_3_\nLinux: _URL_1_ (xChat)\nMac: _URL_2_ or Textual (paid)\n\nIf you google a bit you s... | [] | [] | [
[
"chat.freenode.net",
"http://www.silverex.org/news/",
"http://limechat.net/mac/",
"http://hexchat.github.io/"
],
[
"irc.freenode.net"
]
] | |
2q30s4 | that lurching feeling you get going over a bridge in a car? | Why does your stomach make that funny lurching feeling when going over a humpback bridge or riding a rollercoaster? Adrenaline? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2q30s4/eli5_that_lurching_feeling_you_get_going_over_a/ | {
"a_id": [
"cn2bzcx"
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"score": [
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"text": [
"I assume 'humpback' bridge means that it's something [like this](_URL_0_).\n\nThe answer to that is acceleration. As you drive up the incline you're accelerating up - you're being pushed upward by the car as the car is pushed up by the incline in... | [] | [] | [
[
"https://www.google.ca/search?q=arched+bridge&es_sm=122&tbm=isch&imgil=jd3hoF7OrN2fbM%253A%253BIQ5s412F8JHh-M%253Bhttp%25253A%25252F%25252Fkaleidoscope.cultural-china.com%25252Fen%25252F10Kaleidoscope3071.html&source=iu&pf=m&fir=jd3hoF7OrN2fbM%253A%252CIQ5s412F8JHh-M%252C_&usg=__GC... | |
74exr8 | How did the Early Medieval Irish Economy work? | I have read in several places now that wealth in Early Medieval Ireland was shown by giving things away. In particular kings sustained their status by giving food and gold away. How did this work? Where did the food and gold come from for them to give away?
(This is a repost of an earlier unanswered question. I believ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/74exr8/how_did_the_early_medieval_irish_economy_work/ | {
"a_id": [
"dny1c8l"
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"score": [
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],
"text": [
"Yes, kings did \"give things away\", but as in many premodern societies these \"gifts\" came with a catch ;). Irish kingship can be seen as an extension of the more general socio-economic hierarchy that underpinned Irish society. In this system,... | [] | [] | [
[]
] | |
7i30vn | why do tea bags say ‘do not microwave’? | Does it have to do with how the tea steeps? Or something with metal staples on the bag? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7i30vn/eli5_why_do_tea_bags_say_do_not_microwave/ | {
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"score": [
1466,
780,
94,
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10,
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"text": [
"Because you are doing it wrong!\n\nYou are supposed to put tea... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[
"https://www.newscientist.com/article/2155582-superheated-water-makes-microwaved-eggs-explode-when-you-dig-in/"
],
[]
] | |
oa3dn | Would it be survivable to jump out of a plane using a Zorb ball instead of a parachute? | Here is a [video](_URL_0_) of Jackie Chan (presumably not genuinely) rolling down a cliff in a Zorb. A note on the video asks this question, and got me wondering. | askscience | http://www.reddit.com/r/askscience/comments/oa3dn/would_it_be_survivable_to_jump_out_of_a_plane/ | {
"a_id": [
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"score": [
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"text": [
"It's theoretically possible to have a ball large and light enough to reduce terminal velocity to a survivable level. The question is whether or not you could find a feasible material to build this ball out of, and I'm afrai... | [] | [
"http://www.youtube.com/watch?v=mI7vz9Bd664"
] | [
[],
[
"http://en.wikipedia.org/wiki/G-force#Typical_examples_of_g-force",
"http://en.wikipedia.org/wiki/Drag_equation"
]
] | |
2eqy24 | Why did the British never establish any titles of nobility in the new world. For instance, why was there never a Duke of Pennsylvania? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2eqy24/why_did_the_british_never_establish_any_titles_of/ | {
"a_id": [
"ck23sz3",
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"score": [
13,
6
],
"text": [
"hi! always room for more input, but you may be interested in these related posts\n\n* [Why did the British Empire never extend the peerage system to their colonies?](_URL_0_)\n\n* [Why are there no Australian/Canadian/New Z... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/181b1b/why_did_the_british_empire_never_extend_the/",
"http://www.reddit.com/r/AskHistorians/comments/1ch1ne/indigenous_peerages_grafted_onto_european_empires/",
"http://www.reddit.com/r/AskHistorians/comments/u1nof/why_no_american_aristocracy/",
"ht... | ||
2u1veb | How did Japanese chroniclers portray early Christian converts? | before and after the purge of Christians and missionaries under the Tokugawa Shogunate. for instance (as an example):
how did the fact that many of the leaders of the vanguard of the invasion of Korean impact later assessments of the war and those
don't feel constrained by that specific example and honestly i would ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2u1veb/how_did_japanese_chroniclers_portray_early/ | {
"a_id": [
"co4frnh"
],
"score": [
3
],
"text": [
"I'm not sure I understand your post's subtext. Could you clarify what you mean by \n\n > for instance how did the fact that many of the leaders of the vanguard of the invasion of Korean impact later assessments?\n\nFirstly, it's important to note... | [] | [] | [
[]
] | |
505zxw | What issues would be be worried about if we were experiencing global cooling, instead of global warming? | With global warming, there are many interesting consequences that I never would have considered. What would these be if the planet was cooling? | askscience | https://www.reddit.com/r/askscience/comments/505zxw/what_issues_would_be_be_worried_about_if_we_were/ | {
"a_id": [
"d71u2ag"
],
"score": [
8
],
"text": [
"Then you'd be wondering about whether we'd be heading for a full scale glaciation, such as the most recent one which ended about 0.1 MY ago, in the Pleistocene. \n\nSuch events can begin rather suddenly, geologically speaking, and would eventuall... | [] | [] | [
[]
] | |
1qkb2r | Why is plasma hard to work with? | I was reading an article on fusion, specifically about MIT's Alcator C-mod reactor. It mentioned how they use plasma to prevent the walls from melting under the intense conditions and gave this:
> Indeed, Nobel laureate Richard Feynman once described confining plasma within a tokamak as trying to hold Jell-O with ru... | askscience | http://www.reddit.com/r/askscience/comments/1qkb2r/why_is_plasma_hard_to_work_with/ | {
"a_id": [
"cddoo5l",
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"score": [
55,
7,
8
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"text": [
"Fusion plasmas are tough to work with because of several things. \n\n1. They're hot. **REALLY** hot. \n2. Plasmas exist as seperated ions and electrons. So, they are usually very chemically reactive. R... | [] | [] | [
[
"http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CC4QFjAA&url=http%3A%2F%2Ffire.pppl.gov%2Fmaterials_ofes_wirth.pdf&ei=Mv6DUoq4D4i-sQSQ2oDQCw&usg=AFQjCNGF2FF92mSpGf98U2HW6XO8zC9E3g&sig2=VYpMPKgfJxJXKv8g2xASUA&bvm=bv.56343320,d.cWc&cad=rja",
... | |
44cvo5 | Whaling and what it brought? | Hi all historians i come from a place in the UK called Hull,it has quite the maritime past.We once was the icon of port and fishing even quite the masters at _URL_0_ we would have supplied quite the pretty penny and amount of trade .This was just a bit of history of my home town.But I am writing this to ask what do you... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/44cvo5/whaling_and_what_it_brought/ | {
"a_id": [
"czpf4lk"
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"score": [
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"text": [
"Hello! I actually wrote my [undergraduate thesis](_URL_0_) using the British Arctic Whaling Databank (built by the University of Hull). \n\nWhile the bulk of my research was centered on the econometrics of whaling, I included a lot of informati... | [] | [
"whaling.So"
] | [
[
"https://github.com/DaveahamLincoln/Academic-Papers/blob/master/Thesis-%20An%20Econometric%20Analysis%20of%20British%20Arctic%20Whaling%20Ports%201770-1775.pdf"
]
] | |
5pw3pi | What was the point of buffalo eradication in 1870s? | Wouldn't it be more profitable if they harvested a self sustaining population? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5pw3pi/what_was_the_point_of_buffalo_eradication_in_1870s/ | {
"a_id": [
"dcv238z"
],
"score": [
2
],
"text": [
"So you actually just recently missed a truly excellent post about very much this topic!\n\nHere is the link to the thread: _URL_1_\n\nAlong with this other longer post from /u/snapshot52 _URL_0_\n\nSimply put compared to cattle for consumption Bu... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/4j42ag/there_was_military_involvement_by_the_united/d33w2sx/",
"https://www.reddit.com/r/AskHistorians/comments/5hx9mf/why_did_the_north_american_bison_never_take_off/"
]
] | |
3gpppv | california recently released black shade balls to conserve water. how does that work and wouldn't the black absorb the heat causing the water to evaporate faster? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3gpppv/eli5_california_recently_released_black_shade/ | {
"a_id": [
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11,
3
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"text": [
"Below the boiling point, water can only evaporate at a boundary between air and water. \n\nThis is because the temperature of a material is just the average temperature of all molecules. Within liquid ... | [] | [] | [
[],
[
"http://www.amusingplanet.com/2011/11/ivanhoe-reservoir-covered-with-400000.html"
],
[]
] | ||
1r5nsj | why is kennedy such a big deal in the us? | As I understand, he was well liked president, and was then assassinated. But it's been... How long? Why is he still spoken about so much, made movies about, Obama visiting his grave, etc.? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1r5nsj/eli5why_is_kennedy_such_a_big_deal_in_the_us/ | {
"a_id": [
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7,
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"text": [
"Its a big deal right now because tomorrow marks the 50th anniversary of his death. Otherwise its what you said plus its a pretty big deal for conspiracy nuts as well.",
"Assassinations are somewhat... | [] | [] | [
[],
[],
[]
] | |
15ml0r | In America, what causes political parties to change and/or die out, and are there any parallels to the current state of the Republican Party? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/15ml0r/in_america_what_causes_political_parties_to/ | {
"a_id": [
"c7ntuzr",
"c7nu07d"
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"score": [
3,
2
],
"text": [
"Hello!\n\n\nMost political parties die out because it's something that's more or less inevitable with first past the post voting (and having a democracy in general). There is an excellent video on this topic by CGPGrey that ... | [] | [] | [
[
"http://www.youtube.com/watch?v=s7tWHJfhiyo"
],
[]
] | ||
339vym | why don't teeth grow continuously like nails? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/339vym/eli5_why_dont_teeth_grow_continuously_like_nails/ | {
"a_id": [
"cqiverb",
"cqivklu"
],
"score": [
3,
3
],
"text": [
"Your teeth are actually bones. Like most bones they do grow, but they fall out because you need bigger ones to grow in, not just expand your guns.",
"The why for most \"why doesn't our body do xyz\" tends to be a disappo... | [] | [] | [
[],
[]
] | ||
4dv2y6 | why can you "hear" a tv when it flickers or the color suddenly switches, like from black to white? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4dv2y6/eli5_why_can_you_hear_a_tv_when_it_flickers_or/ | {
"a_id": [
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"d1ut0tn",
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"score": [
3,
69,
5,
2,
2
],
"text": [
"Do you mean a CRT TV or flatscreen?",
"What you're hearing is coil whine from the steering electromagnets of the CRT. In order to aim the stream of elect... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
34hr0e | [engineering] what's the difference in fan design between a fan that blows and a fan that suctions? | Sorry if this is not the right subredit! And thanks in advance :) | askscience | http://www.reddit.com/r/askscience/comments/34hr0e/engineering_whats_the_difference_in_fan_design/ | {
"a_id": [
"cqvg7e2"
],
"score": [
3
],
"text": [
"Take a fan that blows. Pick it up and turn it around. Now it sucks. It's really that simple.\n\nThe shape, angle and number of blades in the fan might vary based on the desired flow velocity and pressure change across the fan and desired rotation... | [] | [] | [
[]
] | |
rwn9k | Why don't our lungs fill with mold? | When I think about it, my lungs are warm, moist, dark, and constantly exposed to mold spores in the air. How am I even still breathing? What keeps our lungs from being the perfect breeding ground for molds, fungus, and other nasty things? | askscience | http://www.reddit.com/r/askscience/comments/rwn9k/why_dont_our_lungs_fill_with_mold/ | {
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"The lungs may be warm and moist, but they are able to defend themselves from mold (and other external pathogens) via the immune system. In people with normal immune systems, th... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Aspergillosis"
],
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"http://en.wikipedia.org/wiki/Aspergillosis",
"http://www.calpoly.edu/~eperryma/yewang/dust.jpg",
"http://en.wikipedia.org/wiki/Alveolar_macrophage"
],
[
"http://www.advancedmaterials.unc.edu/research/180-virtual-lung-forest"
],
[
... | |
etj7ey | How was Muscovy (The Grand Duchy of Moscow) and later the Tsardom of Russia able to grow from being the backwater of Europe to being a Great Power with such a large population? | After being freed from Mongol rule, Muscovy didn't have a large economy nor population and was surrounded by states of equal strength such as Novgorod.
Despite this, over the years they were able to somehow gain a much bigger population (with the population of Siberia being rather small so I guess it didn't contribu... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/etj7ey/how_was_muscovy_the_grand_duchy_of_moscow_and/ | {
"a_id": [
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"First of all, thanks for the question. It’s not often that people are so deeply interested in someone’s story.\n\nThe Principality of Novgorod, the Principality of Vladimir-Suzdal, the Principality of Tver, the Principality of Moscow is the core ... | [] | [] | [
[]
] | |
13bce6 | What happened to the French army after the fall of France in WWII? Why did they not have a beach for D-Day? | I've read that upwards of [139,997](_URL_1_) French Troops were evacuated at Dunkirk. [Wikipedia](_URL_2_) says that 86,000 were rescued on June 2 and 3 alone.
Did other French Troops manage to escape France after the fall? Somehow tons of Polish forces managed to escape the Poland (wiki says: ["The Polish armed for... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/13bce6/what_happened_to_the_french_army_after_the_fall/ | {
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"French commandos fought at Sword Beach with the British on D-Day. \n\nThe French were granted the right to liberate Paris, and an infantry division was waiting under de Gaulle's command for that moment... | [] | [
"http://en.wikipedia.org/wiki/Polish_contribution_to_World_War_II#Polish_Forces_.28West.29",
"http://wiki.answers.com/Q/How_many_FRENCH_TROOPS_were_evacuated_from_Dunkirk_in_1940",
"http://en.wikipedia.org/wiki/Dunkirk_evacuation"
] | [
[],
[],
[]
] | |
1iwalj | I heard that Gorbachev broke the Communist Party's power. How did he rise to the top if that was his intention in the first place? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1iwalj/i_heard_that_gorbachev_broke_the_communist_partys/ | {
"a_id": [
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"text": [
"[There was a similar thread a year ago](_URL_0_) with some good answers. New ones are welcome here as well though.",
"More or less, it was because the Soviet leadership understood a younger General Secretary was needed a... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/ywga5/why_did_the_soviets_allow_gorbachev_to_assume/"
],
[]
] | ||
2srbmh | why only cheaper phones have dual sim | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2srbmh/eli5_why_only_cheaper_phones_have_dual_sim/ | {
"a_id": [
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"text": [
"Expensive and highend phones are mostly sold by cell service providers on a contract. They don't want that you use the phone you bought from them with the sim card of a different company.",
"Because the majority of more ... | [] | [] | [
[],
[]
] | ||
f3cr1g | Where to find raw/good quality Pulsar sounds? | Alright, not really a science thing but its about the space anyways. I am obsessed with pulsar sounds. Youtube has a crap audio quality so I am searching for other options. If you know, please tell me! Thanks in advance | askscience | https://www.reddit.com/r/askscience/comments/f3cr1g/where_to_find_rawgood_quality_pulsar_sounds/ | {
"a_id": [
"fhibluy",
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"text": [
"I don't know what's on youtube, but here are some from Jodrell Bank: _URL_0_\n\nThere is noise present, but that's intrinsic to the data.",
"_URL_2_\n\n_URL_1_\n\n_URL_0_\n\n_URL_3_\n\n_URL_4_"
]
} | [] | [] | [
[
"http://www.jb.man.ac.uk/research/pulsar/Education/Sounds/"
],
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"http://www.radiosky.com/rspplsr.html",
"http://hosting.astro.cornell.edu/~deneva/psr_sounds/pulsars_sounds.htm",
"http://www.jb.man.ac.uk/research/pulsar/Education/Sounds/",
"http://www.astrosurf.com/luxorion/audiofiles-puls... | |
2jgcq4 | why do streamed movies cost the same as dvds/blu-rays? | Shouldn't the price of a streamed movie be knocked down by lack of physical packaging such as the disc, shell, and paper insert, even by just a couple dollars? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2jgcq4/eli5_why_do_streamed_movies_cost_the_same_as/ | {
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"They charge that amount because people pay it. Yes, it's cheaper to stream than to produce a physical product, but since people will still pay the blu-ray prices for a streamed movie, that's what they c... | [] | [] | [
[],
[],
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] | |
axjdbk | a vast majority of cords and cables are black. why? | My phone charger cable is black, my aux cable is black, my hard drive cable is black. My coffee machine cord is black, my toaster cord is black. Black, black, black, black. Why is it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/axjdbk/eli5_a_vast_majority_of_cords_and_cables_are/ | {
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"text": [
"It is not a bright colour and doesnt attract your attention which somewhat increases the aethestics of what ever appliance is in question because you dont notice the cord as much ",
"There are several reasons for this. ... | [] | [] | [
[],
[]
] | |
3te7e9 | how tyres work | I am at work right now, I have been working here about a month now. I sell tyres online/on phone.
I have no idea what actually makes a tyre good or bad or why certain tyres are better at things. I am good at pretending, but I would like to actually know these things.
Example; what is the physical difference between a ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3te7e9/eli5_how_tyres_work/ | {
"a_id": [
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"A tire is just a way for a car to grip the ground, without putting wear on the car's actual structure.\n\nA tyre has to be hard enough to last thousands of miles, but at the same time soft enough that you don't slide on the ... | [] | [] | [
[],
[]
] | |
9p66g4 | During Matthew Perry's second visit to Japan, he threatened to send 100 ships to Japan to declare war if his demands weren't met. Did Perry have authorization to start a war? What was so imperative about Japan that the US would threaten war? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9p66g4/during_matthew_perrys_second_visit_to_japan_he/ | {
"a_id": [
"e80199u"
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"text": [
"I saw a similar question a few weeks ago, maybe the answers there (especially /NientedeNada) will be helpful to you.\n\n_URL_0_"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/8i5ci9/why_did_usa_give_japan_an_ultimatum_to_open_their/"
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] | ||
4r8r54 | why do vegans avoid oils and healthy foods like avocados and nuts? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4r8r54/eli5_why_do_vegans_avoid_oils_and_healthy_foods/ | {
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"text": [
"Not a vegan myself, but there is a huge overlap between modern day vegans and other diet-obsessed people. They may just avoid fat because they believe its also bad for you.\n\nIf you want to do \"the ve... | [] | [] | [
[],
[],
[]
] | ||
8i1g4d | what's the point in signing the credit card receipt after a purchase? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8i1g4d/eli5_whats_the_point_in_signing_the_credit_card/ | {
"a_id": [
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"score": [
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"In some places they do actually take your card and match the signature on the back to the signature you write on the receipt.\n\nIt also gives you a vehicle to dispute a charge you didn't make - if some... | [] | [] | [
[],
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enjo0h | how are the sequins on those reversible sequined pillows sewn? |
You know those sequined pillows where they're one color first, and then you rub the sequins the other way and it's another color? I couldn't help but wonder how factories manage to get all of those little sequins in an orderly fashion on the fabric for such a cheap price as to be found in Wal Marts everywhere.
Obvi... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/enjo0h/eli5_how_are_the_sequins_on_those_reversible/ | {
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"text": [
"I know you said you couldn't think of a machine that could do that, but fabric factory owners certainly can!\n\nIt is basically exactly as you'd expect: vast numbers of sequins ... | [] | [] | [
[
"https://www.youtube.com/watch?v=uGSE3YE6n3Q",
"https://www.youtube.com/watch?v=Jd5kW0AAYTY"
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[],
[],
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5aakgv | what exactly is the correlation between britain and england, and how are their governments structured? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5aakgv/eli5_what_exactly_is_the_correlation_between/ | {
"a_id": [
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"Britain- Island\n\nEngland- Country whose borders take up ~62% of the island mentioned above\n\nUnited Kingdom- Sovereign state made of the countries on the island of Britain, along with most of the islands that make up the ... | [] | [] | [
[],
[]
] | ||
62ibiv | ip addressing and isp's | My question is when you access the internet and you get a new IP frequently what information does the ISP have that allows them to know "Oh Address X is using this IP"
At first I thought it would be the MAC address of the modem that the ISP gave you to get address, but you can buy your own.
So, I guess to summerize, ... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/62ibiv/eli5_ip_addressing_and_isps/ | {
"a_id": [
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"text": [
"You're still plugging the modem into the cable that goes to your ISP. That means they still see your MAC address. \n\nThey can also block all unknown MAC addresses until you call them, but most ISPs don't do that any more. "... | [] | [] | [
[],
[]
] | |
f6uhck | when talking about web servers, what is a « cluster » ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f6uhck/eli5_when_talking_about_web_servers_what_is_a/ | {
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"text": [
"A cluster is multiple computers that work as a unit.\n\nIf your traffic is too large for one computer to handle, you use some sort of load balancing scheme to distribute that traffic amongst multiple computers. A cluster al... | [] | [] | [
[],
[]
] | ||
7wl1ha | Why did the Soviet Union organize its peoples into homogenous titular republics? | It seems like they would be easier to control if they were as scrambled as possible. For example, making a state half Latvian half Russian, or merging Kyrgyzstan with half of Kazakhstan. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7wl1ha/why_did_the_soviet_union_organize_its_peoples/ | {
"a_id": [
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"text": [
"Hi. Great question.\n\nI wrote an essay on this topic, so I think I can answer your question, hopefully it meets the standards. I will be using the nation of Georgia as an example of an incorporated nation-state, because it engendered a conflict ... | [] | [] | [
[
"https://www.marxists.org/archive/lenin/works/1922/dec/testamnt/autonomy.htm"
]
] | |
2ynev1 | i know pi doesn't = 4, but how can you explain this? | _URL_0_
Thanks for all the quick responses! | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ynev1/eli5_i_know_pi_doesnt_4_but_how_can_you_explain/ | {
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"text": [
"The issue here has a similar principle to fractals. The thing to remember to spot the error is that a circle is *not* a polygon with a bunch of sides. As you get larger and larger numbers of sides, it w... | [] | [
"https://imgur.com/1v37hx9"
] | [
[],
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3nade0 | how did galileo observe that earth revolves around the sun? can an average person today convince themselves of that fact with some basic observations and math? | i.e. without any equipment that is super fancy. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3nade0/eli5how_did_galileo_observe_that_earth_revolves/ | {
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"He didn't. He observed that Jupiter's moons revolved around Jupiter. The previous position supported by the Church was that the Eart... | [] | [] | [
[],
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[],
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[],
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"https://en.wikipedia.org/wiki/File:Fases_de_Venus_-_Galileo_Galilei.png"
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1oafk2 | how does artists like banksy make a living? | Being unknown and apparently making illegal graffiti, how do artists such as Banksy earn money to live and even travel around the world constantly? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1oafk2/eli5_how_does_artists_like_banksy_make_a_living/ | {
"a_id": [
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"I don't know about \"artists like Banksy\", but he (she?) makes a lot of money selling original copies and prints of his work for huge sums, showcasing in galleries as most artists do, and selling several books of pictures of his work. Also I thi... | [] | [] | [
[]
] | |
3ztcog | how are presidential polls considered to be representative of public opinion when i've never met someone who has actually sat through a phone interview for one? | I've never been called for one, but even if I was I would probably think it was a prank or a telemarketer. So when I see poll statistics on TV and they say candidate "A" has 30% support, don't they REALLY mean candidate "A" has 30% support among the kind of people who answer polling calls? And doesn't that color the re... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ztcog/eli5_how_are_presidential_polls_considered_to_be/ | {
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"Not sure how its done in US, but in Canada when they do poll they a... | [] | [] | [
[],
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[],
[],
[],
[],
[
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1470567/"
],
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5jctz2 | how come various people from around the country contract meningitis without being in contact with each other? how come one contract meningitis out of nowhere? | Here in Italy we have a little meningitis outbreak but, of the 5-6 people who actually have the illness, only two of them were in contact with each other, the other are in town 200-300km from one another. How come one contract meningitis out of nowhere? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5jctz2/eli5_how_come_various_people_from_around_the/ | {
"a_id": [
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"Meningitis is not a disease, it's a set of symptoms. It can be caused by a whole bunch of different diseases, some viral, some bacterial, and some neither. There's no way of knowing where exactly it came from, but I doubt all five have it caused ... | [] | [] | [
[]
] | |
2wy5rz | how do we know that dolphins rape other dolphins? | Reddit continually likes to describe dolphins as rapey. I've heard it in many nature documentaries and the like too.
But how do we know that dolphins rape? A dolphin has no laws as such, and most likely do not have concepts or social constructs such as consent, age of consent etc. Couldn't it be that what we perceive ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2wy5rz/eli5_how_do_we_know_that_dolphins_rape_other/ | {
"a_id": [
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"text": [
"They behave in aggressive manners sometimes, but they don't even engage in the scientific animal form of \"rape\", which is called forced copulation. There may be isolated incidents of this occurring for all we know, but it's certainly not a comm... | [] | [] | [
[]
] | |
2c8off | Several questions on Norman Knights | Hey guys, I have some Norman Ancestry, suffice to say I'm very, very interested in Norman military history. I have several questions, if you could answer them it would be greatly appreciated.
1. I do know that Rollo made a concerted effort to adopt a Frankish styled government, but how soon did the Danes adopt Knighth... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2c8off/several_questions_on_norman_knights/ | {
"a_id": [
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"text": [
"1. Knighthood had not become a distinct institution at the time of the initial Norman settlement. Knighthood basically coalesced during the period of the 10th and early 11th centuries, simultaneous with the development of the duchy of Normandy.\n... | [] | [] | [
[]
] | |
7gw292 | Does Pluto have a liquid nitrogen ocean under it's frozen nitrogen surface? | askscience | https://www.reddit.com/r/askscience/comments/7gw292/does_pluto_have_a_liquid_nitrogen_ocean_under_its/ | {
"a_id": [
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"score": [
32,
5,
3
],
"text": [
"The reason we find liquid water oceans under the ice of certain worlds is because solid water ice is less dense than liquid water, and so ice can float over a water ocean and both maintain its pressure... | [] | [] | [
[],
[],
[]
] | ||
9fnz29 | why do ups packages seem to take routes that are cover far more distance that what seems logical? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9fnz29/eli5_why_do_ups_packages_seem_to_take_routes_that/ | {
"a_id": [
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2
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"text": [
"I've always wondered this too because depending where I order from my packages end up occasionally going from somewhere on the east coast over to Kentucky, Tennessee, Illinois, etc. before making it back to Florida. Once in Florida they can some... | [] | [] | [
[]
] | ||
37quax | if sound travels fastest through solids and slowest through gases, why does heat do the opposite? | Aren't they both just the vibration of molecules? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/37quax/eli5_if_sound_travels_fastest_through_solids_and/ | {
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"text": [
"Heat transfer in a gas is primarily through the movement of the gas. As the gas gets stirred up the hot gas can move across its container very quickly.\n\nA hot solid can transfe... | [] | [] | [
[],
[],
[],
[]
] | |
3121xl | Is there any evidence that shows black holes could be pocket universes? | I've read a few descriptions of the event horizon around singularities as the line where space-time becomes so warped that there is no such thing as "the direction I came from" there is only forward and deeper. I've also read that the laws of physics break down in there and calculations run to infinity. Is it possible ... | askscience | http://www.reddit.com/r/askscience/comments/3121xl/is_there_any_evidence_that_shows_black_holes/ | {
"a_id": [
"cpxwsc1"
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"score": [
6
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"text": [
"No. Everything inside the horizon is falling towards the center quite rapidly. In fact, space and time essentially switch roles inside the horizon, so you can no more stop yourself from falling to the center than you can stop yourself from goin... | [] | [] | [
[]
] | |
d6hcw2 | Why did certain fringe elements within the black American community start to associate themselves with Hebrews/Judaism. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/d6hcw2/why_did_certain_fringe_elements_within_the_black/ | {
"a_id": [
"f0uh3la"
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"score": [
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"text": [
"Well, black slaves associated themselves with the Exodus narrative pretty early on, but if you're wondering about those groups that claim blacks are the real Jews (referred to as Black Hebrew Israelites on Wikipedia), the earliest explicit ones c... | [] | [] | [
[
"https://youtu.be/LeF1d3BONmo",
"https://drive.google.com/open?id=1f4zzTKf0Cc3p128csbyK0U2V-5ogUvDAH_Gtjx-63gk",
"https://drive.google.com/open?id=1f4zzTKf0Cc3p128csbyK0U2V-5ogUvDAH\\_Gtjx-63gk"
]
] | ||
9s1auu | if bedbugs are so difficult to kill and control how come they haven’t infested every building and home? | Bedbugs are the one thing that keep me up at night. I can go into a full sweat thinking about them and this was my latest thought. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9s1auu/eli5_if_bedbugs_are_so_difficult_to_kill_and/ | {
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"score": [
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44,
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"text": [
"Many businesses and apartment buildings have routine pest control visit their buildings a f... | [] | [] | [
[],
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2fye7f | What is Islam's historical view of Jesus? | The standard view of Jesus (Yeshua of Nazareth) is that he claimed up-front to be the literal Son of God. By Islamic standards this is obviously horribly blasphemous, and yet Jesus is still regarded as a major prophet in Islam. How would a Muslim reconcile their faith's hardline divine unicity with a prophet who claime... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2fye7f/what_is_islams_historical_view_of_jesus/ | {
"a_id": [
"ckez85k"
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"text": [
"So the comments here are all talking about whether the historical Jesus claimed to be a descendant of God. Unless I'm misunderstanding your question, the answer to that question is irrelevant. The question is, how did *Muslims* view this.\n\nVery... | [] | [] | [
[]
] | |
2ixmx5 | When Byzantines and Arabs referred to Catholics as "Franks", were they generalizing or did they truly believe all Catholic Europeans were of a single language and culture? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ixmx5/when_byzantines_and_arabs_referred_to_catholics/ | {
"a_id": [
"cl6gmqq",
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"score": [
19,
36,
5
],
"text": [
"Piggy back question, did European Crusaders consider all Muslims and Middle Easters the same or did differentiate between Turks and Arabs. ",
"All those culture groups in the West at the time were... | [] | [] | [
[],
[],
[]
] | ||
4odcjl | is there any reason not to have a dash cam in the united states? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4odcjl/eli5_is_there_any_reason_not_to_have_a_dash_cam/ | {
"a_id": [
"d4bjrzm",
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"score": [
6,
3,
3
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"text": [
"Well, you have to buy it, you have to set it up, and you also have an impartial witness to YOUR behavior, as well as others.\n\nIf there are so many crappy drivers out there, logic suggests that if ever... | [] | [] | [
[],
[],
[]
] | ||
176nyn | Rotational physics question | Hi there, askscience. A dumb question, but I'm the type of guy who will ask it anyway :)
First, here's a picture to demonstrate what I'm asking:
_URL_0_
Two circles fixed together at the centre of each circle. The first circle is larger than the second one. They rotate together. The red circles are marks, which are s... | askscience | http://www.reddit.com/r/askscience/comments/176nyn/rotational_physics_question/ | {
"a_id": [
"c82p1dp",
"c82qnbm"
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"score": [
2,
6
],
"text": [
"the first and second disc will rotate at the same speed (equal radians per second). However the further you are from the center of the disc the dot needs to pass a longer distance in the same time, and therefor is moving fas... | [] | [
"http://imgur.com/WFGSnfq"
] | [
[],
[
"http://en.wikipedia.org/wiki/Angular_velocity"
]
] | |
rqs2b | So I sliced my Ring Finger washing dishes... Why does my Middle Finger feel like it's sliced too? | askscience | http://www.reddit.com/r/askscience/comments/rqs2b/so_i_sliced_my_ring_finger_washing_dishes_why/ | {
"a_id": [
"c47vsxy",
"c47xctp"
],
"score": [
2,
2
],
"text": [
"I did not slice my middle finger... :P",
"The ring finger and the middle finger are served by the same nerve, as Phage0070 pointed out to you. You've caused enough damage to the surrounding tissue to swamp the ends of th... | [] | [] | [
[],
[]
] | ||
1bywl4 | What is quantum spin? Are there any "everyday" examples? | I was reading in a physics book (by Jim Al-Khalili, I believe) and it started talking about a property called quantum spin? I looked it up, and didn't really get any good info. So, Reddit, what is quantum spin? Are the particles actually spinning? | askscience | http://www.reddit.com/r/askscience/comments/1bywl4/what_is_quantum_spin_are_there_any_everyday/ | {
"a_id": [
"c9bfdkk",
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"score": [
39,
2
],
"text": [
"Ordinary objects, when they are rotating, have a property called *angular momentum*. Angular momentum measures not just the rate at which something is spinning, but also how big the arc is through which it is rotating. Th... | [] | [] | [
[],
[
"http://0.tqn.com/d/physics/1/0/6/2/-/-/06f_SpinFamily.jpg"
]
] | |
dtfff2 | why do some room temperature food items taste cold? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dtfff2/eli5_why_do_some_room_temperature_food_items/ | {
"a_id": [
"f6w8g9l",
"f6wbic2"
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"score": [
17,
2
],
"text": [
"Your body feels temperature by heat loss, it doesn't really know the temperature number per se. That's why a wooden table feels hotter than a metal one, they are both at the same room temperature but you lose more heat by t... | [] | [] | [
[],
[]
] | ||
22eunv | how much repulsive force can two or more magnets produce? | I'd like to know if magnets on their own or using some combo can produce repulsive force of order like 1000N or so?
What factors hamper such things, like area, material etc? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/22eunv/eli5_how_much_repulsive_force_can_two_or_more/ | {
"a_id": [
"cgm4jbf"
],
"score": [
2
],
"text": [
"It comes down to their strength, size, shape, and distance between them.\n\nHere is a calculator from a site that sells neodymium magnets, some of the strongest you can find\n\n_URL_0_\n\n\nThe strongest I found was around 3000N between two magne... | [] | [] | [
[
"http://www.kjmagnetics.com/calculator.asp"
]
] | |
2watkd | how is there more virtual money in the world than real money? | I have tried to understand this so many times but I just can't get my head around it. At what point did this occur?
If 10 people entrust £10 each to a bank, and the bank holds there money and invests it elsewhere, there is still the same amount of money. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2watkd/eli5how_is_there_more_virtual_money_in_the_world/ | {
"a_id": [
"cop3umb",
"cop3un9",
"cop4x3r"
],
"score": [
2,
7,
2
],
"text": [
"~~Check out fractional reserve.~~ Banks are only required to hold a certain percentage of their claimed balances in real money. They create money by lending out more than they ~~actually have,~~ would ... | [] | [] | [
[],
[],
[]
] | |
3t5t7n | why is it so easy to take in 10k refugees and house them rather than house homeless veterans? (in america) | I know this question may sound political but when I recently saw this, I thought it was a no brainer (meaning to house veterans rather than refugess).
Therefore, I'm assuming theres more to the story than just the simplistic *refugee vs. homeless veteran* narrative. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3t5t7n/eli5_why_is_it_so_easy_to_take_in_10k_refugees/ | {
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"cx3hvps",
"cx3i9vv",
"cx3iy2g",
"cx3j911",
"cx3k6q3",
"cx3kjh6",
"c... | [] | [] | [
[],
[],
[],
[],
[],
[
"http://nchv.org/index.php/news/media/background_and_statistics/#faq"
],
[],
[],
[],
[],
[
"http://www.news.com.au/entertainment/tv/tv-shows/walked-aly-hits-out-at-isis-over-paris-attacks-calls-them-weak/news-story/e884afd6dd7781d6f7a105b321ca5d2d"
],
[
"h... | |
1e8ehz | How did the long wars of the Medieval period last as long as they did? | I know that, for example, the 100 Years War was a series of conflicts, but still.
How do kingdoms with fairly rudimentary economies continue to raise and supply armies in the field for a century? At one point a good chunk of France including Paris is under foreign control and they're still raising armies to fight th... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1e8ehz/how_did_the_long_wars_of_the_medieval_period_last/ | {
"a_id": [
"c9xub1w"
],
"score": [
3
],
"text": [
" > How do kingdoms with fairly rudimentary economies continue to raise and supply armies in the field for a century?\n\nIn short, they didn't. With the exception of the crusades, medieval wars were relatively short campaigns, decided after one or... | [] | [] | [
[]
] | |
5m9ogd | Why wasn't Isaac Newton persecuted by the church after he wrote the Principia, like Galileo was | Was it because the Anglican church was more favorable to science than the Catholic Church, or were there other factors involved? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5m9ogd/why_wasnt_isaac_newton_persecuted_by_the_church/ | {
"a_id": [
"dc21t4n",
"dc22zmq"
],
"score": [
3,
7
],
"text": [
"At the time the *Principia* was published, British intellectual culture was reasonably tolerant of some degree of religious dissent. The 1689 Toleration Act (two years after the first edition of the Principia was published) ... | [] | [] | [
[],
[]
] | |
1ahys0 | I just saw War Horse. To what extent were horses used in WW1? | Also what are the odds of a horse surviving the war. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ahys0/i_just_saw_war_horse_to_what_extent_were_horses/ | {
"a_id": [
"c8xlz68",
"c8xmvj3"
],
"score": [
33,
5
],
"text": [
"Extensively. None of the belligerants were heavily motorised and all relied on horses to haul artillery, ammunition, food, wounded and every other manner material required to fight the war.\n\nCombat wise, the use of war ho... | [] | [] | [
[],
[
"http://www.firstworldwar.com/features/forgottenarmy.htm",
"http://www.cbc.ca/news/canada/story/2012/11/08/f-war-horse-harry-baker-langan.html"
]
] | |
36huao | Does a helium tank get heavier the emptier it gets? | I know that it would get progressively less massive, but would it weigh more on a standard scale as it got empty? | askscience | http://www.reddit.com/r/askscience/comments/36huao/does_a_helium_tank_get_heavier_the_emptier_it_gets/ | {
"a_id": [
"cre2vq8",
"cre4v2j"
],
"score": [
8,
13
],
"text": [
"If you mean empty by filling in atmospheric air, then yes, it's possible.\nBut! Actual mass is proportional to the particles inside, so if the pressure inside was significantly bigger that the 1 Atm pressure outside, it can... | [] | [] | [
[],
[]
] | |
2wf2p1 | Are there any cases of organisms evolving from land dwelling into water dwelling? | askscience | http://www.reddit.com/r/askscience/comments/2wf2p1/are_there_any_cases_of_organisms_evolving_from/ | {
"a_id": [
"coqjkk4",
"coqle1n"
],
"score": [
14,
5
],
"text": [
"Cetaceans: whales, dolphins, and porpoises.",
"Plants evolved on land. Any true plant that lives in the water evolved this secondarily. The same is true of insects. "
]
} | [] | [] | [
[],
[]
] | ||
53bhk1 | Brandenburg was completely ravaged during the 30 Years War, but came out of it with a big army and their claims on Prussia and Pomerania honoured. How did this happen? | From what I know Brandenburg is an unfertile stretch of land with no natural barriers. During the war their land was plundered by Swedes, Imperials and other Germans. But then the Great Elector comes along and suddenly they have 20.000 fighting men and are a prized ally, which results in their claims being honoured and... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/53bhk1/brandenburg_was_completely_ravaged_during_the_30/ | {
"a_id": [
"d7rzlin"
],
"score": [
96
],
"text": [
"After inheriting the throne in 1640, the Frederick William had only a few thousand mercenaries and refugees from other armies at his disposal because of the stingy grants from the Estates. The mercenaries under his payroll terrorized the land th... | [] | [] | [
[]
] | |
qs220 | why war is bad for the economy | I've heard people talk about the "broken window fallacy". What is this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/qs220/eli5_why_war_is_bad_for_the_economy/ | {
"a_id": [
"c3zzqgq"
],
"score": [
4
],
"text": [
"War is good if the government buys your stuff. See these charts for [Boeing](_URL_1_), [BAE](_URL_2_), [Lockheed Martin](_URL_0_), all of which get tons of money from the US government to build weapons. The Iraq War kicked off in 2003, you can se... | [] | [] | [
[
"https://www.google.com/finance?chdnp=1&chdd=1&chds=1&chdv=1&chvs=maximized&chdeh=0&chfdeh=0&chdet=1331508115777&chddm=991576&chls=IntervalBasedLine&q=NYSE:LMT&&fct=big",
"https://www.google.com/finance?chdnp=1&chdd=1&chds=1&chdv=1&chvs=maxim... | |
5ku6xr | Why did British colonists view miscegenation with natives so much more negatively than Portuguese colonists did? | The /r/AskHistorians podcast episode (#50, the first one on Zimbabwe) mentions that in southern Africa, the Portuguese approved of--and even encouraged--interracial marriage because it would promote stability. The British took a very different attitude, which eventually grew into full apartheid.
But surely the British... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5ku6xr/why_did_british_colonists_view_miscegenation_with/ | {
"a_id": [
"dbqwqce"
],
"score": [
6
],
"text": [
"This answer is maybe a bit tangential to you question, as it focused on Brazil (and the European and African population thereof), but I hope it helps!\n\nA significant portion of modern Brazil's population is mixed race, usually European descende... | [] | [] | [
[]
] | |
6nv3il | Why was it so much easier prior to World War 2 to invade other countries without risking your economy collapsing or severe economic embargoes? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6nv3il/why_was_it_so_much_easier_prior_to_world_war_2_to/ | {
"a_id": [
"dkdo1pa",
"dke6i0a"
],
"score": [
13,
3
],
"text": [
"World War 2 was the result of a centuries-long process: the escalating cost of warfare in both men and material. This is usually brought up by historians in relation to [the military revolution] (_URL_0_) of the renaissance... | [] | [] | [
[
"https://faculty.history.wisc.edu/sommerville/351/351-16.htm"
],
[]
] | ||
41f716 | the heisenberg uncertainty principle and how it affects the development of teleportation. | Title | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/41f716/eli5_the_heisenberg_uncertainty_principle_and_how/ | {
"a_id": [
"cz1ukrf",
"cz1ule2",
"cz1xlov"
],
"score": [
6,
3,
2
],
"text": [
"The Uncertainty principle is a principle which states that the velocity and position of a subatomic particle cannot be known at the same time. This is due to properties of wave functions and fourier tra... | [] | [] | [
[],
[],
[]
] | |
vqvjc | How did ancient fortified cities handle sewage and guard against plague and fire? | Were there any other threats to their well-being that could not be handled by military force? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/vqvjc/how_did_ancient_fortified_cities_handle_sewage/ | {
"a_id": [
"c56vttj"
],
"score": [
6
],
"text": [
"Sewage: throw it in a hole or ditch or into the street, or even better, a river. This was sufficient until population increases in the C19th led to overcrowding and made sewers necessary. London only started building sewers in 1859, after cholera... | [] | [] | [
[]
] | |
16m2bm | I'm an average English person in the 1300s, how much do I know about the world? | How knowledgeable would the average English person of the Medieval era be about current affairs, what the world looked like, where countries where etc? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/16m2bm/im_an_average_english_person_in_the_1300s_how/ | {
"a_id": [
"c7xa87y",
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"c7xg2s8"
],
"score": [
63,
306,
33,
9,
146,
5,
3,
5,
10
],
"text": [
"Define average. An average person would have been living out on... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Monopod_(creature\\)",
"http://en.wikipedia.org/wiki/Cynocephaly",
"http://en.wikipedia.org/wiki/Blemmyes_(legendary_creatures\\)"
],
[],
[],
[
"http://www.finerollshenry3.org.uk/content/month/fm-09-2010.html"
],
[
"http://www.amazon.co.uk/Montai... | |
48p7d5 | why are more area codes introduced to regions? how can they be running out of phone numbers? | Our area is introducing a second area code, for the reason that we are "running out of phone numbers". However by my calculation there are 282,475,249 possible 7 digit phone number combinations (7^10 ) which is close to the population of the United States (~318,900,000 people). How can we be running out of phone number... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/48p7d5/eli5why_are_more_area_codes_introduced_to_regions/ | {
"a_id": [
"d0letjr",
"d0lhv8k",
"d0lisuh"
],
"score": [
6,
6,
3
],
"text": [
"Your math is wrong it's 10^7, not 7^10.\n\n10^7 is just 10 million. Also, a few of these numbers are not valid - so it's actually several million but not quite 10 million possibilities.\n\nWhen you coun... | [] | [] | [
[],
[],
[
"https://en.wikipedia.org/wiki/Almon_Brown_Strowger"
]
] | |
17v268 | What do we know about european history before ancient greece? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/17v268/what_do_we_know_about_european_history_before/ | {
"a_id": [
"c8940ke"
],
"score": [
35
],
"text": [
"It depends on whether you're going to be strict about your interpretation of history versus prehistory - before Herodotus you have very few (if any) written accounts that I know of about Europe, and even then, H. limits his account to a misguide... | [] | [] | [
[]
] | ||
bgjgti | Why does it seem like throughout Ancient history, tribes were continually pushing out (North, West, and South) from Eastern Europe or the Steppes? | In the 100s BC, Germanic tribes were pushing in to Gaul enough that it gave Rome pretext for invasion. Germanic tribes also went north, supplanting the natives in Scandinavia.
In the 4th and 5th century, Goths and Lombards and Vandals moved West, leading to the fall of the Western Roman Empire. The 5th century also s... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/bgjgti/why_does_it_seem_like_throughout_ancient_history/ | {
"a_id": [
"ellvn26"
],
"score": [
4
],
"text": [
"This is a good question with no possible good answer. In each case, the variables were different, and we should add to this the hypothesized \"migration\" of the Proto-Indo-Europeans into Europe, from some homeland variously located in the wester... | [] | [] | [
[]
] | |
o63iz | Does the CMB show us anything beyond our observable universe? | Or is the Observable universe the only thing we have information on? | askscience | http://www.reddit.com/r/askscience/comments/o63iz/does_the_cmb_show_us_anything_beyond_our/ | {
"a_id": [
"c3eo4we",
"c3ep4k6"
],
"score": [
4,
2
],
"text": [
"not really, no. the CMB is just about at the very limit of what can constitute our observable universe. There are some theories some are trying to test that some of the patterns in the CMB could possibly be correlated with o... | [] | [] | [
[],
[]
] | |
1wudro | if your mouth has more germs than your anus, why is it easier for you to get sick from putting your mouth on someone's anus rather than kissing them? | Are there germs on the butthole that are just more potent? If so, what are they? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1wudro/eli5_if_your_mouth_has_more_germs_than_your_anus/ | {
"a_id": [
"cf5g1jp",
"cf5g53d"
],
"score": [
4,
3
],
"text": [
"Because \"number of germs\" is not in any way a good indicator of how likely you are to get sick. Your body contains many many billions of bacteria, most of which are actually beneficial to your body. In this specific case, ... | [] | [] | [
[],
[]
] | |
91r79p | why does one foot grow smaller than the other? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/91r79p/eli5_why_does_one_foot_grow_smaller_than_the_other/ | {
"a_id": [
"e303kck"
],
"score": [
2
],
"text": [
"Despite the general look of it, the body isn't fully symmetric on the outside. It's also not symmetric on the inside at all."
]
} | [] | [] | [
[]
] | ||
5nj5gw | compass/navigation experts | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5nj5gw/eli5_compassnavigation_experts/ | {
"a_id": [
"dcbuuww",
"dcbv016"
],
"score": [
3,
2
],
"text": [
"If you are lost a compass will not help you out on its own. A compass will only tell you the direction you are facing and not the direction you should be heading in. To be able to navigate with a compass you also need a map ... | [] | [] | [
[],
[]
] | |
46ygrz | When did Gold become a standard backer of currency, and why? | If I recall correctly, the British Empire began the tradition, mainly because it benefited them economically. What exact time period did they begin doing this, and was there a certain event or driving force that brought about this policy? There has to be reason other than gold being shiny and people being fond of tre... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/46ygrz/when_did_gold_become_a_standard_backer_of/ | {
"a_id": [
"d08ttyv",
"d090g7r"
],
"score": [
2,
2
],
"text": [
"Your question, I think, has an incorrect supposition, in that gold \"became a backer\" of other currency. Gold has been used as money and currency since coinage was invented, and before that it was used in trade both in \"ra... | [] | [] | [
[],
[]
] | |
wznn0 | how do languages without alphabets organize long lists (ex. names)? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/wznn0/eli5_how_do_languages_without_alphabets_organize/ | {
"a_id": [
"c5hvq72",
"c5hw23i"
],
"score": [
13,
6
],
"text": [
"In Chinese, different characters require a different number of strokes to write properly. There is a \"correct\" order to write characters and a set number of lines you can use as a stroke. Think of it as using Tetris bloc... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Devanagari",
"http://en.wikipedia.org/wiki/Hangul"
]
] | ||
6iieee | how do people work on huge programming projects | My first thought would be like a game engine, how does a group of people coordinate that, do they spend hours a day in group meetings?
Also just games in general with pre existing engines, like Blizzard employs like hundreds of programmers and stuff and they all work together to get their respective projects done | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6iieee/eli5how_do_people_work_on_huge_programming/ | {
"a_id": [
"dj6hd9r",
"dj6hphw",
"dj6ijb1",
"dj6imfm"
],
"score": [
3,
2,
2,
4
],
"text": [
"They break the tasks up into chunks which can be manipulated independently. The basic idea is to have \"objects\" that take certain kinds of input and give certain kinds of output,... | [] | [] | [
[],
[],
[],
[]
] | |
2c5lzy | WW2 German Security Regiments, specifically 286th Security Regiment before and during Op. Bagration | Hello, I've been trying to find some information on the 286th Security Regiment, and German security regiments in general.
Generally I've been trying to figure out what their TO & E looked like and what an average security regiment would be doing on the Eastern Front during 1944/45.
Specifically I would like to know ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2c5lzy/ww2_german_security_regiments_specifically_286th/ | {
"a_id": [
"cjcb3pw"
],
"score": [
4
],
"text": [
"I take that you mean the 286. Sicherungs-division (Security Division), not regiment?\n\nThe division was created on the 15th of March 1941 and was a rear area security division. It guarded rail and road junctions, important infrastructure and ind... | [] | [] | [
[]
] | |
777vni | what’s the fundamental difference between a cpu and a npu? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/777vni/eli5_whats_the_fundamental_difference_between_a/ | {
"a_id": [
"dojrkrm"
],
"score": [
4
],
"text": [
"Software developer here,\n\nA CPU has a fixed set of operations it can perform - there's physical circuitry for adding integers, for multiplying integers, for loading and storing, for shifting binary bits, etc. Each operation is enumerated, and a... | [] | [] | [
[]
] | ||
4ashi8 | How is Li-Fi faster than Wi-Fi if radio waves and light travel at the same speed? | askscience | https://www.reddit.com/r/askscience/comments/4ashi8/how_is_lifi_faster_than_wifi_if_radio_waves_and/ | {
"a_id": [
"d13cwix",
"d13d25b",
"d13deyw"
],
"score": [
14,
7,
5
],
"text": [
"The light waves don't travel faster than radio waves. Light is much higher in frequency. Therefore higher bandwidth modulation can be used therefore higher data rates. Also you don't have to worry abo... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Intersymbol_interference"
],
[
"http://morsecode.scphillips.com/translator.html"
]
] | ||
57mg4w | What was the reaction of Henry VII and his court to the news of the New World? | Was there any recorded commentary? Were there any early plans to colonize, or was that not in the interests of England at the time? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/57mg4w/what_was_the_reaction_of_henry_vii_and_his_court/ | {
"a_id": [
"d8tb4w8"
],
"score": [
4
],
"text": [
"*I can offer a partial answer to this question but I readily defer to other historians for whom this area is their primary expertise.*\n\nHenry VII was originally unwilling to support an expedition west in search of a new sea route to markets in ... | [] | [] | [
[]
] | |
2me45r | During the Bush War, the Rhodesian Light Infantry earned a reputation for being perhaps the best counter-insurgency force in the world. Was this reputation deserved? How did they achieve such incredible results? | Because conflict in the 21st century is all about asymmetrical warfare involving stateless combatants (and occasionally containing only stateless combatants) I was wondering what lessons we (NATO, UNSC etc) can learn from the Bush war, and whether we can tailor these approaches to peacekeeping style operations. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2me45r/during_the_bush_war_the_rhodesian_light_infantry/ | {
"a_id": [
"cm3f3hx",
"cm3fspw"
],
"score": [
8,
7
],
"text": [
"I've previously written an answer to a similar question [here](_URL_0_).\n\nNeedless to say, they worked very well as a *military* force but as a counter-insurgency force, they were actually downright awful. Unfortunately, t... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/2hmgrd/why_was_the_war_in_rhodesia_rhodesian_bush_war/cku03c1"
],
[
"http://en.wikipedia.org/wiki/Wind_of_Change_%28speech%29"
]
] | |
1irtuw | How close can we fly a spacecraft to the Sun? Any reason to send a craft right at the Sun? | askscience | http://www.reddit.com/r/askscience/comments/1irtuw/how_close_can_we_fly_a_spacecraft_to_the_sun_any/ | {
"a_id": [
"cb7ftdq",
"cb7g8tf",
"cb7mkds",
"cb7mrlm",
"cb7n2zb"
],
"score": [
10,
132,
9,
5,
2
],
"text": [
"In principle, we can launch a spacecraft that will impact the sun, but I don't see why it would be worth the expense of doing so.\n\nIf we were going to ge... | [] | [] | [
[],
[],
[],
[],
[
"http://einstein.stanford.edu/",
"http://en.wikipedia.org/wiki/Gravity_Probe_B"
]
] | ||
39a2zu | is there any way for super-large companies to actually fail? what would have to happen for google, microsoft, apple and the likes to actually disappear? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/39a2zu/eli5_is_there_any_way_for_superlarge_companies_to/ | {
"a_id": [
"cs1n4fs",
"cs1obyz",
"cs1r8ce",
"cs1r9e0",
"cs1sn2k",
"cs1t5k1",
"cs1tjpi",
"cs1tqkf",
"cs1u479",
"cs1uoos",
"cs1v1x7",
"cs1vcwc",
"cs1wzrq",
"cs1y0bn",
"cs1y7ah",
"cs1ycto",
"cs1yd9z",
"cs1zfux",
"cs20aa1",
"cs20dfh",
"c... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[
"http://www.amazon.com/Search-Stupidity-Twenty-Marketing-Disasters/dp/1590597214/ref=sr_1_1?s=books&ie=UTF8&qid=1433950725&sr=1-1&keywords=in+search+of+stupidity"
],
[],
[
"https://hbr.org/2011/04/how-i-did-it-blockbusters-f... | ||
9ojdu3 | how is something simply 'deleted' when using something like a camera or phone? | I'm out of the loop with technical computer-y stuff, so I was wondering what happens to the stuff that I stored? Does it all get compressed to a byte? What happens to the video and photo stored? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9ojdu3/eli5_how_is_something_simply_deleted_when_using/ | {
"a_id": [
"e7uid99",
"e7uinb9",
"e7ujplv"
],
"score": [
5,
3,
2
],
"text": [
"Basically your computer/device marks that space as unused. When it needs to save something new then it overwrites any space marked that way. So it is still there, a bunch of tiny on or off (1 or 0) swit... | [] | [] | [
[],
[],
[]
] | |
2hlqvs | If you stood on the axis of the Earth's rotation would you be spinning as fast as the Earth? | askscience | http://www.reddit.com/r/askscience/comments/2hlqvs/if_you_stood_on_the_axis_of_the_earths_rotation/ | {
"a_id": [
"ckttx6r",
"cktu2oz"
],
"score": [
11,
2
],
"text": [
"Yes, you would make 1 revolution in 24 hours.",
"If you stand still on the Earth's axis of rotation, you will rotate at the speed of the Earth (one full turn per day). Further away from the axis, your motion will trace ... | [] | [] | [
[],
[
"http://www.universetoday.com/26623/how-fast-does-the-earth-rotate/"
]
] |
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