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 |
|---|---|---|---|---|---|---|---|---|---|
2u87oi | why can certain entities charge a "convenience fee" for paying by credit card when credit card company policy is that the price cannot be more when paying by credit card | title | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2u87oi/eli5_why_can_certain_entities_charge_a/ | {
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"text": [
"Straight up: these entities are violating their contracts with their merchant services provider. There is a maximum fee of $1/transaction that merchants are allowed to charge for Debit transactions, but credit must be the amount of the sale. I do... | [] | [] | [
[]
] | |
a9wq67 | when someone rubs their fingers together rather forcefully for a while, why does black residue start to appear? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a9wq67/eli5_when_someone_rubs_their_fingers_together/ | {
"a_id": [
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"score": [
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"text": [
"It are dead skins cells, plus salty sweat.\n\nIt's the (now dead) skin cells which have been rubbed off and rolled into small balls, which all clumped together and are visible because of the collective size.\n\n",
"The... | [] | [] | [
[],
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] | ||
1yv2ms | Is there anything considered "cutting edge" in history right now? | Are there things people are researching/talking about now that historians weren't talking about before? Are there ideas/discoveries theories that could change our understanding of the past? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1yv2ms/is_there_anything_considered_cutting_edge_in/ | {
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cj6ztp | How do (we think) type-II semiconductors work? | askscience | https://www.reddit.com/r/askscience/comments/cj6ztp/how_do_we_think_typeii_semiconductors_work/ | {
"a_id": [
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"score": [
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"text": [
"I think this is a typo: Type-II **super**conductors?"
]
} | [] | [] | [
[]
] | ||
1vwxdn | how do companies that sell domains create them, if i decided i wanted to do there job how would i do it? | Like if I want to create a website I must buy a domain from a company that gets them how? Was confused by this. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1vwxdn/eli5_how_do_companies_that_sell_domains_create/ | {
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"From my understanding of domains, domain registration companies like Go daddy technically don't create a website domain for you. You submit a domain name, and if someone else isn't using it, they licens... | [] | [] | [
[],
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12oirz | How far can a human being theoretically travel in a lifetime? | Assuming we have a spaceship with enough energy to accelerate at the maximum acceleration a human can withstand for half the journey and decelerate the other half.
How far can you travel in 10 years? 50? 100?
Also, is this kind of spaceship theoretically impossible? | askscience | http://www.reddit.com/r/askscience/comments/12oirz/how_far_can_a_human_being_theoretically_travel_in/ | {
"a_id": [
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"See: _URL_0_\n\nIt is reckoned that the top achievable velocity for soft fleshy things is about 0.5 c. Above that the diffuse interstellar medium made up mostly of hydrogen will create too much of a radiation problem for the flesh, or even harden... | [] | [] | [
[
"http://www.scirp.org/journal/PaperInformation.aspx?paperID=23913"
]
] | |
eit3vw | why does a person feel more pain during a lethal injection execution than an animal being "put to sleep"? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eit3vw/eli5_why_does_a_person_feel_more_pain_during_a/ | {
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"text": [
"Because drug manufacturers don't want their drugs associated with executions, so they won't sell the drugs used on animals to the state for that purpose. The state has to scrounge up whatever lethal drugs it can that will do the job, and it's usu... | [] | [] | [
[]
] | ||
1bnccn | formal and informal fallacies | What exactly are they, and can your provide examples of fallacious arguments of both varieties? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1bnccn/eli5_formal_and_informal_fallacies/ | {
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"A formal fallacy is an argument where the given information doesn't support the conclusion that is made. An informal fallacy occurs when there is a flaw in the reasoning, but not necessarily with the logic.\n\n\nExamples:\n\... | [] | [] | [
[],
[]
] | |
ahzbhj | why, at airport security screenings, do electronics need to be put in a separate tray? can't scanners see through a bag/luggage? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ahzbhj/eli5_why_at_airport_security_screenings_do/ | {
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apl18m | Did the colonisation of Congo by Leopold II benefit the congo in the post-colonial period in terms of infrastructure? | I was reading a thread in /r/Belgium on the UN advising the state to apologise for its colonial past earlier on and various posters were discussing the extent of the massacre/genocide in congo, whether it was even a genocide and the usual nonsense that goes with negationism.
Now, what I noticed in the thread is variou... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/apl18m/did_the_colonisation_of_congo_by_leopold_ii/ | {
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"I wrote a fairly lengthy paper on the Congo following decolonization recently, but obviously I’m not flaired so I’m not sure if this will be accepted. \n\nAnyway, I believe most scholars are of the consensus that what occurred in the Congo under ... | [] | [
"https://www.reddit.com/r/belgium/comments/apian8/un_experts_advise_belgian_government_to_apologise/eg8ir5e/"
] | [
[]
] | |
5xzdfv | why do some meats need to be thoroughly cooked (e.g. chicken) and others can be cooked to varying degrees (e.g. beef) or not at all (e.g. fish)? | In the context of food safety, that is. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5xzdfv/eli5_why_do_some_meats_need_to_be_thoroughly/ | {
"a_id": [
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"text": [
"Risk vs reward basically - if chicken tasted great while served medium rare, we would wager that up against the chance of getting a salmonella infection.\n\nDuring times of serious outbreaks in cattle disease, certain parts,... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Anisakis"
]
] | |
o2zr2 | Is LASIK reasonably safe? | I was researching LASIK for my fiancee and I notice mixed messages on the various internet sources.
On one hand, doctors and manufacturers [**claim extremely high success**](_URL_2_) rates, yet on the other hand I see [**warnings from the FDA**](_URL_0_), and a [**petition filed**](_URL_3_) for the recall of LASIK dev... | askscience | http://www.reddit.com/r/askscience/comments/o2zr2/is_lasik_reasonably_safe/ | {
"a_id": [
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"text": [
"As with most surgeries (and it is a surgery), the safety of LASIK depends a lot on the patient.\n\nWith modern femtosecond lasers to make the flap and wavefront-guided computer stippling lasers to shape the cornea, the LASIK... | [] | [
"http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/SurgeryandLifeSupport/LASIK/ucm272960.htm",
"http://lasikcomplications.com/FDA_interim_response_LASIK_petition.pdf",
"http://en.wikipedia.org/wiki/LASIK#LASIK_surgery_results",
"http://lasikcomplications.com/LasikPetition/petition.html"
] | [
[],
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"http://www.lasikcomplications.com/vitreoretinal_damage.htm",
"http://journals.lww.com/retinajournal/Abstract/2000/04000/Rhegmatogenous_Retinal_Detachment_After.3.aspx",
"http://eyes.emedtv.com/lasik/retinal-detachment-with-lasik-eye-surgery.html"
]
] | |
5tksxt | why can you "brick" phones so easily, but not computers? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5tksxt/eli5_why_can_you_brick_phones_so_easily_but_not/ | {
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4ddsbw | what is the difference between good and bad welding? | I saw the recent pictures of what looked like "good" welding, in that it was pretty, and that's about all I took away from it. What does it actually mean for welding to be good vs bad? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ddsbw/eli5_what_is_the_difference_between_good_and_bad/ | {
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"Welds can be bad for a number of reasons. You probably saw a \"tig\" weld, where wire was coiled over itself to make a cool braided look. A bad weld would be made my using too lit... | [] | [] | [
[],
[],
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] | |
skuia | Is a human closer (in orders of magnitude) to the size of universe or the size of a muon? | Muon may be the wrong subatomic particle, maybe quark? | askscience | http://www.reddit.com/r/askscience/comments/skuia/is_a_human_closer_in_orders_of_magnitude_to_the/ | {
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"text": [
"Woops I accidentally a word.",
"In terms of mass we are closer to the size of a muon, which is 1.88x10^-28 kg ,compared to the mass of the observable universe which is 3x10^52... | [] | [] | [
[],
[],
[],
[]
] | |
1avf8n | Did the spread of Buddhism nearly cause an economic collapse in Ancient China? | This question does not appear to be in the reddit search tool bar, nor in the FAQ. Google can't seem to help me either.
A little background: I remember very clearly reading in a world history class about the spread of Buddhism into China. The story stuck with me, but ever since then i've not been able to find it agai... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1avf8n/did_the_spread_of_buddhism_nearly_cause_an/ | {
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"text": [
"What is clearly true: that Buddhists survived off of the charity of others. that buddhists were at many times free from corvee or taxes. And that many went into the buddhist clergy. \nHowever, whomever told you that this ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Han_Yu"
],
[
"http://anthro.ucsd.edu/~dkjordan/chin/faanfor/TarngPersecutions.html",
"http://www.historylearningsite.co.uk/dissolution_monasteries.htm",
"http://online.sfsu.edu/rone/Buddhism/Buddhism%20in%20China.htm"
]
] | |
7dldw6 | i don't understand how it is possible to cool a car engine with air alone. so how does air-cooled engines work? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7dldw6/eli5_i_dont_understand_how_it_is_possible_to_cool/ | {
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"text": [
"There is a lot of air, and the average temperature of the air is suitable for long-term engine operation. It's simply a matter of exchanging the engine heat with enough air. Ev... | [] | [] | [
[],
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"http://autowpaper.com/images/trabant-601-engine-2.jpg",
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"https://sc02.alicdn.com/kf/HTB1Rw6vMVXXXXc1XXXXq6xXFXXX5/150cc-motorcycle-engine-for-Honda-CG150-motorcyc... | ||
27l3wn | why do us schools have such a ridiculously long summer break? | As a brit, this has never made any sense to me, our summer break is usually around 6 weeks between late July and early September. It baffles me to think that in the US the break is 2-3 months long! Whats the reason for this? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27l3wn/eli5_why_do_us_schools_have_such_a_ridiculously/ | {
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"The tradition is in far... | [] | [] | [
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"http://www.summercampculture.com/wp-content/uploads/2012/01/Screen-shot-2012-01-12-at-7.53.43-PM.png"
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shwzz | Why is blasting an earth-ending asteroid into pieces so readily dismissed? | I keep seeing television shows about asteroids hitting earth and how we could prevent that. In each show it seems the experts ("experts"?) shit on the idea of blowing the asteroid apart. But why is it that nuking an asteroid into many pieces makes the outcome worse? I understand the claim that instead of one impact the... | askscience | http://www.reddit.com/r/askscience/comments/shwzz/why_is_blasting_an_earthending_asteroid_into/ | {
"a_id": [
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"text": [
"First, not all asteroids are composed of the same material. A primarily rocky asteroid would be affected differently than a primarily metallic asteroid. So you would need to know a lot about the asteroid (density, etc).\n\nSecond would be accur... | [] | [] | [
[]
] | |
ue0s3 | Why were there so many one-term presidents between Jackson and Lincoln? | From the time Andrew Jackson left office in 1837 to when Abraham Lincoln was sworn in in 1861, the United States had a run of eight straight presidents who served a single term or less. Were there any historical factors in the antebellum period that caused this, or was it mostly a coincidence?
*Sidebar question:* If O... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/ue0s3/why_were_there_so_many_oneterm_presidents_between/ | {
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"text": [
"Mainly due to the fact that the presidency as we know it today, i.e. as a determinant of general national politics, was not the same during the 1800s. The jur... | [] | [] | [
[],
[],
[],
[
"http://www.youtube.com/watch?v=H9SvJMZs5Rs"
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[]
] | |
42iooc | how is it that a cop can testify that a suspect said something incriminating to them and it is admissible, but the cop can't testify that the suspect said something exonerating because it would be hearsay? | In reference to a recent LifeProTip: _URL_1_
This is the exact moment the lawyer explains this: _URL_0_ | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/42iooc/eli5_how_is_it_that_a_cop_can_testify_that_a/ | {
"a_id": [
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"text": [
"It's called an \"admission by a party opponent.\" Basically, the statements of an opposing party in litigation are always admissible and are either an exception to hearsay or not hearsay at all (depending on the jurisdiction). So the prosecution ... | [] | [
"https://youtu.be/6wXkI4t7nuc?t=558",
"https://www.reddit.com/r/LifeProTips/comments/42hc3t/lpt_dont_talk_to_the_police/"
] | [
[]
] | |
16lxw0 | why can't canadians watch/stream the same usa shows online? | specificially-- whats up with the regions/streaming rights of American tv shows for Canadians. What benefit does the American networks have by not allowing Canadians to watch.
eg) Streaming shows on HBO, CBS, MTV (USA) for Canadians is impossible. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/16lxw0/why_cant_canadians_watchstream_the_same_usa_shows/ | {
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4
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"text": [
"Distribution rights are owned by different companies/people in different countries. If your country does not allow streaming service for something that a different country does allow it is your distribu... | [] | [] | [
[],
[
"http://proxmate.dave.cx/"
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] | |
4iy5nc | Why wasn't Prometheus a more worshipped figure in Ancient Greece? | In Greek mythology, Prometheus is mostly renowned for two acts of compassion towards humans:
- Stealing fire from Mt. Olympus, and giving it to humans...
- Tricking Zeus into making the sacrificial parts of animals the inedible parts, as to provide humans with more food...
Prometheus is eventually punished by Zeus,... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4iy5nc/why_wasnt_prometheus_a_more_worshipped_figure_in/ | {
"a_id": [
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"text": [
"Prometheus did in fact have a cult, but it was a fairly minor one. It's wrong to think that since a figure appears as an important character in folklore he is necessarily an important cult-figure, though--Roman Jupiter, for example, is more or l... | [] | [] | [
[]
] | |
4rucj9 | Why Italy wasn't occupied by the Allies after WWII, compared to Germany/Austria or Japan? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4rucj9/why_italy_wasnt_occupied_by_the_allies_after_wwii/ | {
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"text": [
"The short answer is because the Italians themselves had defenestrated Mussolini and the Fascists before fighting alongside the Allies in a civil war to take their country back from Nazi Germany.\n\nThe long answer is that Italy *was* occupied by... | [] | [] | [
[
"http://www.nytimes.com/learning/general/onthisday/big/1013.html#article"
]
] | ||
2yen6c | Why are diesel engines preferred over petrol in heavy towing/moving applications? | askscience | http://www.reddit.com/r/askscience/comments/2yen6c/why_are_diesel_engines_preferred_over_petrol_in/ | {
"a_id": [
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"text": [
"Diesel is preferred for the following:\n\n* Better gas mileage\n* Power (torque) is maximized at a lower RPM setting (compression 17:1 vs. 9:1 for gas) reducing wear & tear on engine. \n* Longevity favors Diesel Engines\n... | [] | [] | [
[],
[]
] | ||
ah15b5 | why is it a bad thing if companies and apps collect my data? | It seems like everyone is warning you about apps that collect much data if you use them. But to me the “worst“ thing that could happen is that I get customized ads (which I think is a cool thing). What's the big deal if you ain't got anything to hide?
I'm living in Germany and I'm wondering if this is a typical german... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ah15b5/eli5_why_is_it_a_bad_thing_if_companies_and_apps/ | {
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"text": [
"If you don't mind your life being prodded and mined for statistical data, being socially engineered or just them ... | [] | [] | [
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1l0tz6 | If someone is born with polydactyly (extra fingers) and get the extra finger removed, do they experience phantom limb syndrome? | askscience | http://www.reddit.com/r/askscience/comments/1l0tz6/if_someone_is_born_with_polydactyly_extra_fingers/ | {
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"text": [
"No, they wouldn't. Phantom limb comes after the brain has dedicated a small region of the somatosensory cortex to a corresponding body part, and that happens throughout the course of childhood. Kids can even lose entire li... | [] | [] | [
[],
[]
] | ||
if8sy | Why does blood turn red when it's oxygen depleted and blue when it's oxygen rich? | Just looking for the answer as to why blood turns red when it's oxygen depleted and blue when it is oxygen rich. I'm asking why those two specific colors, rather than any others.
Thanks! | askscience | http://www.reddit.com/r/askscience/comments/if8sy/why_does_blood_turn_red_when_its_oxygen_depleted/ | {
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"text": [
"Don't you mean red when it's oxygen rich and blue when it's depleted?\n\nI often notice my blood turn blue when it's exposed to the oxygen in the air.",
"Blood is never blue, ... | [] | [] | [
[],
[
"http://scienceblogs.com/scientificactivist/2008/04/why_are_veins_blue.php"
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[]
] | |
w85zm | How exactly does this work? Anti-gravity magnets in a copper pipe. | I'm genuinely confused by this. I thought copper wasn't magnetic? Materials aren't my science but I'm intrigued by this video. | askscience | http://www.reddit.com/r/askscience/comments/w85zm/how_exactly_does_this_work_antigravity_magnets_in/ | {
"a_id": [
"c5b3qzg",
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"text": [
"Briefly, because the copper is a conductor, the magnet induces an electric field in the copper. This electric field then interacts with the magnet, slowing down the magnet. \n\n[_URL_0_](_URL_0_)\n\n",
"Copper is not f... | [] | [] | [
[
"http://regentsprep.org/Regents/physics/phys08/clenslaw/default.htm"
],
[
"http://en.wikipedia.org/wiki/Eddy_current",
"http://www.youtube.com/watch?v=nrw-i5Ku0mI"
]
] | |
3hsa0f | Did any of the Crusades help the Byzantine Empire in any way? | The first Crusade was done because the Romans wanted help to defeat the Turks. However it seems the Crusaders had their own ideas. Can anyone tell me if there were positive to the Romans in one way or another and how? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3hsa0f/did_any_of_the_crusades_help_the_byzantine_empire/ | {
"a_id": [
"cua6ykb"
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"score": [
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],
"text": [
"The first Crusade actually liberated some cities for the Byzantines so they did gain some land. Originally the Crusaders agreed to give all conquered territory to the Byzantines but after the first couple of cities fell they reneged on that prom... | [] | [] | [
[]
] | |
2zgzh8 | How/Why did the eagle become the symbol of Rome | as opposed to a wolf which i think would have made more sense | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2zgzh8/howwhy_did_the_eagle_become_the_symbol_of_rome/ | {
"a_id": [
"cpitg4i",
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"score": [
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4
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"text": [
"The eagle or aquila as it was called in Latin, was actually just one of five animals used to represent Rome as part of their standards. Pliny the Elder mentions five animals being used to represent Rome, the eagle, wolf, bo... | [] | [] | [
[],
[]
] | |
11ho0e | Is there such a thing as a real-life self-destruct? | ...Or are they exclusively plot devices in movies and video games? Are there any historical examples of a self-destruct sequence in anything people have ever built, so that when activated the entire thing demolishes itself via explosion, possibly after a certain amount of time for the person activating it to retreat to... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/11ho0e/is_there_such_a_thing_as_a_reallife_selfdestruct/ | {
"a_id": [
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"score": [
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3,
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"text": [
"After the Germans signed the Armistice on 11/11/1918 their High Seas Fleet sailed to Scapa Flow ... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Self-destruct"
],
[],
[
"http://en.wikipedia.org/wiki/Range_safety",
"http://en.wikipedia.org/wiki/2_cm_Flak_30/38/Flakvierling",
"http://en.wikipedia.org/wiki/57_mm_AZP_S-60"
],
[
"http://en.wikipedia.org/wiki/Self-destruct"
],
[
"http://w... | |
9bghtr | why are car wheels so much smaller than bicycle wheels? | Wouldn't car engines more easily push the bigger wheels? Bigger wheels are harder to push, but go faster, right? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9bghtr/eli5_why_are_car_wheels_so_much_smaller_than/ | {
"a_id": [
"e52vel3",
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"score": [
7,
21,
3
],
"text": [
"One relevant note: it's typical on car tires to use (relatively) very wide tires on automobiles compared to tires used on bicycles. Cars typically place a much larger load per tire, and being able to... | [] | [] | [
[],
[],
[]
] | |
1jw4gd | how did they make the first operating system without an o.s to build it on/with? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jw4gd/eli5_how_did_they_make_the_first_operating_system/ | {
"a_id": [
"cbiuvwe",
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"score": [
2,
2
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"text": [
"In the early days of computing, the \"operating system\" (although it wasn't usually called that) was programmed into ROM - Read Only Memory. When the computer was turned on, it would read the instructions in this memory and... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Punch_card"
]
] | ||
1nvhhx | why is it when windows predicts a time to completion for moving a file it's often off by a magnitude of 10? | I've experienced this with a decade of Microsoft OS's. I can't believe they haven't gotten it right yet. I'll move a .mkv video file and it will say 15 seconds remaining for 10 minutes. Or it will say 20 minutes remaining and fly by and finish super-fast. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1nvhhx/eli5_why_is_it_when_windows_predicts_a_time_to/ | {
"a_id": [
"ccmfbgi"
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"score": [
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"text": [
"Say a friend asks you to buy 50 lb of food and hands you a shopping list. You go to the supermarket, read the items on the list line by line, and it says:\n\n\n- 1 lb of white rice\n- 1 lb of white rice\n- 1 lb of white rice\n\n\nThen your friend... | [] | [] | [
[]
] | |
70ydcn | why do photographers who take ages like mr mcfadyen to get the perfect shot, don't just use a videocamera? | Can't they just cut the shot out afterwards? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/70ydcn/eli5_why_do_photographers_who_take_ages_like_mr/ | {
"a_id": [
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"score": [
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"text": [
"Still photos can be much higher resolution since the camera doesn't have to process 24 FPS or anything. \n\nThe shutter speed is also much more customizable. The lower shutter speed required for video creates motion blur between frames. This c... | [] | [] | [
[]
] | |
9jfff7 | Old Western movies have the “Wanted Dead or Alive” posters for outlaws plastered all over town. Now-a-days, there are rewards for fugitive capture but not kill, for that is now murder. When was the last time the US government actually encouraged people to go out and kill fugitives for a reward? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9jfff7/old_western_movies_have_the_wanted_dead_or_alive/ | {
"a_id": [
"e6r8n1p"
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"score": [
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"text": [
"This is a question that has come up before, and while definitely more can be said, [this previous thread](_URL_0_) I suspect will be of interest at least as a starting point, especially the comments from /u/amescg ."
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3xl3bn/when_was_the_last_issuance_of_a_wanted_dead_or/"
]
] | ||
cngd5a | how can parrots live so long. | The general rule with animals as I understand it is: the bigger the animal the longer the life. And smaller animals which can live long like turtles usually have a slow metabolism/inactive life.
So why is it that some parrots, which are very active animals all things considered, can live for an enormous amount of tim... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cngd5a/eli5_how_can_parrots_live_so_long/ | {
"a_id": [
"ewackae",
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"score": [
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"text": [
"Arent those sea creatures that can virtually live forever super tiny? I dont really think there is actual causality in the correlation between size and expectancy but hey, im not a specialist.",
"While it's usually the l... | [] | [] | [
[],
[]
] | |
2s64dy | Did General George B. McClellan prolong the American Civil War? | I've been watching The Civil Wars series created by Ken Burns and produced by PBS in 1990. I’m curious about Major General George B. McClellan, a brief General-in-Chief of the Union Army.
General McClellan was known for being overly cautious and slow to act. Edwin M. Stanton, the United States secretary of war said, ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2s64dy/did_general_george_b_mcclellan_prolong_the/ | {
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"text": [
"Certainly so - he had many opportunities to crush the enemy as Lincoln requested, but his timidness let him down time and time again. I recommend James M. McPherson's *Battle Cry of Freedom* to display... | [] | [] | [
[],
[],
[]
] | |
1hyeua | When did our understanding of the Holocaust go from it being a series of individual events to it being viewed as a systemic, highly mechanized system of murder? | I recently watched Claude Lanzmann's film on the Holocaust [Shoah](_URL_0_) (which I can't recommend highly enough). The entire film consists of first person interviews with various people who were either victims or witnesses or perpetrators to what happened to the Jews under the Nazis, and it made me wonder; at what p... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1hyeua/when_did_our_understanding_of_the_holocaust_go/ | {
"a_id": [
"caz5ztu"
],
"score": [
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"text": [
"Holocaust literally translates from the Greek to \"whole burnt\". [This link](_URL_0_) explains in detail how the term comes about. *The* Holocaust was discerned early on, however the term holocaust has been used throughout history to describe ... | [] | [
"https://en.wikipedia.org/wiki/Shoah_%28film%29"
] | [
[
"http://www.ushmm.org/research/library/faq/details.php#02"
]
] | |
12wvdy | Many of the medications used to treat bi-polar disorder were originally intended and are still used in treating epilepsy. Is there some sort of connection between the two? | Depakote and Lamictal are two that I know at high doses are used to treat epilepsy. At lower doses, they are used to treat bi-polar disorder.
Why is this so? Are the two disorders somehow related? | askscience | http://www.reddit.com/r/askscience/comments/12wvdy/many_of_the_medications_used_to_treat_bipolar/ | {
"a_id": [
"c6ytqfa"
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"score": [
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"text": [
"Maybe. The medications used to treat epilepsy work because they essentially make it harder for a neuron to \"fire\" ([action potential](_URL_0_)). No one truly knows what happens in Bipolar disorder (not hyphenated, btw), but a similar governan... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Action_potential"
]
] | |
1i1b90 | In what way was did Chilean coup d'etat in 1973 affect the Cold War? | I guess my question is how significant was it in the grand scheme of things? Did the US achieve their goals with their involvement? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1i1b90/in_what_way_was_did_chilean_coup_detat_in_1973/ | {
"a_id": [
"cb05f3e"
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"score": [
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"text": [
"The US did achieve their goal of removing a Socialist government in South America in order to install a more Capitalist and American-friendly (albeit very authoritarian and repressive).\n\n\nThe US government's role in ousting Allende and support... | [] | [] | [
[
"http://www.youtube.com/watch?v=MS_bN5ECJTI"
]
] | |
1bbga8 | What supplies did the first Australian settlers have when they arrived in Sydney Cove in 1788? | As I understand, the first settlement was a penal colony. What supplies did the convicts have available to them when they landed? Also, what percentage were convicts? I assume that at least some were independent settlers. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1bbga8/what_supplies_did_the_first_australian_settlers/ | {
"a_id": [
"c95f5wf"
],
"score": [
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"text": [
"The First Fleet consisted of 11 ships: \n\n* 2 navy ships, for carrying officers and staff;\n\n* 6 convict transport ships;\n\n* 3 supply ships.\n\nLieutenant Philip G. King (later Governor of New South Wales), who travelled on the fleet as part... | [] | [] | [
[
"http://en.wikipedia.org/wiki/First_Fleet#People_of_the_First_Fleet",
"http://home.vicnet.net.au/~firstff/list.htm",
"http://www.gutenberg.org/files/3534/3534-h/3534-h.htm#6",
"http://trove.nla.gov.au/ndp/del/page/1383387?zoomLevel=3",
"http://www.gutenberg.org/files/3534/3534-h/3534-h.htm#5",... | |
3odu6i | Are there any plants in the world that produce heat as a part of their regular chemical reactions? | I understand plants can produce light in some cases, but can any produce heat? This could go for fungi as well. | askscience | https://www.reddit.com/r/askscience/comments/3odu6i/are_there_any_plants_in_the_world_that_produce/ | {
"a_id": [
"cvwonu4",
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"score": [
5,
7
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"text": [
"Yes. All living organisms produce heat. Here's what's up:\n\nMany (if not all) plants undergo photosynthesis. That's the process of taking gaseous carbon dioxide and liquid water and changing them into sugar using solar ener... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Thermogenic_plants",
"https://en.wikipedia.org/wiki/Symplocarpus_foetidus"
]
] | |
36zbe3 | If the Earth had the gravity of the moon, would falling of the top of the Empire State Building kill a human? | askscience | http://www.reddit.com/r/askscience/comments/36zbe3/if_the_earth_had_the_gravity_of_the_moon_would/ | {
"a_id": [
"crieldn"
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"text": [
"**Short answer:** A faller's impact speed would be about 50 mph in moon gravity, as opposed to 122 mph in earth gravity. This is survivable.\n\n**Long answer:** Moon surface gravity is 1.6 m/s^2 which is about 15% of earth surface gravity, 9.8 m/... | [] | [] | [
[
"http://www.wolframalpha.com/input/?i=%2850+mph%29^2%2F%28+2*%289.81+m%2Fs^2%29+%29",
"http://www.wolframalpha.com/input/?i=sqrt%28+Moon+surface+gravity+%2F+earth+surface+gravity%29+*+122+mph",
"http://hypertextbook.com/facts/JianHuang.shtml",
"http://www.wolframalpha.com/input/?i=sqrt%28+Moon+sur... | ||
55nkjl | How did upper classes have an 'advantage' when voting during the Roman Republic? | I've read about the process of Roman citizens gathering in centuries based on tribes or locations within the city in order to organise how elections were held - but repeatedly I encounter comments about how this voting structure benefited the upper class' choice of candidate over those from lower class centuries.
I ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/55nkjl/how_did_upper_classes_have_an_advantage_when/ | {
"a_id": [
"d8c56ib"
],
"score": [
9
],
"text": [
"You're not thinking about this quite right. The *comitia centuriata* did not divide the centuries up evenly. The first centuries had far fewer members than the lower centuries, but still accounted for exactly the same weight at the vote. /u/Legal... | [] | [] | [
[
"http://i.imgur.com/fo9scOx.png"
]
] | |
1iu7n6 | what has to be done to a minecraft mod to make it work with a new version of the game? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1iu7n6/eli5_what_has_to_be_done_to_a_minecraft_mod_to/ | {
"a_id": [
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"score": [
6,
5
],
"text": [
"This may be better suited in /r/minecraft",
"The creators of Minecraft (Mojang) don't officially support modifications to the game, a result of this is that there is no official documentation of how the internals of the ... | [] | [] | [
[],
[]
] | ||
ggmun | Question about Hydrogenated Oils / "Trans Fat" | Okay, so here's my issue.
I have been lead to believe by nutrition journalists (is that a profession?) that so-called "trans fats" are worse for me than saturated fats. That's the whole idea behind this "trans fat free" labeling thing that has arisen in recent years.
I recently had a conversation with a biolog... | askscience | http://www.reddit.com/r/askscience/comments/ggmun/question_about_hydrogenated_oils_trans_fat/ | {
"a_id": [
"c1ndyqf",
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"score": [
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2
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"text": [
"When you *completely* hydrogenate oil, it turns in to completely normal saturated fat. However, trans-fats are mono- or poly-unsaturated (or, as we're used to seeing on the label, \"partially hydrogenated\" oils). They hav... | [] | [] | [
[
"http://www.youtube.com/watch?v=TNrMIdzvRww",
"http://www.informaworld.com/ampp/image?path=/713172958/713485754/F0001.png"
],
[
"http://en.wikipedia.org/wiki/Cis_and_Trans"
]
] | |
3fmj1i | Do animals pet humans or other animals? Or is petting other animals an exclusively human behavior? | Many humans love to pet animals, and some animals seem to love being petted. Are there instances of animals that are intelligent enough to respond in kind by petting humans, in order to reciprocate the feeling of being petted?
When [Koko the gorilla petted her kitten](_URL_0_), was it a learned behavior from observing... | askscience | http://www.reddit.com/r/askscience/comments/3fmj1i/do_animals_pet_humans_or_other_animals_or_is/ | {
"a_id": [
"ctsq6wh"
],
"score": [
2
],
"text": [
"There's a lot of animals that show affection and grooming behavior to other species, including repetitive contact over shoulders/head/back. I'm not aware of any species that spontaneously pet, but I suspect that's because the majority of animals... | [] | [
"https://en.wikipedia.org/wiki/Koko_the_gorilla#Koko.27s_pets"
] | [
[]
] | |
ege24u | Is the generation of fossil fuels inevitable on a planet with life? | Is the build-up of fossil fuel deposits an inevitable consequence of billions of years of life on a planet? Is it conceivable that life could exist long enough on a more-or-less Earth-like planet to bring about human-like intelligence, and yet for exploitable deposits of coal and petroleum simply not to exist? | askscience | https://www.reddit.com/r/askscience/comments/ege24u/is_the_generation_of_fossil_fuels_inevitable_on_a/ | {
"a_id": [
"fc9iywk"
],
"score": [
3
],
"text": [
"There are many parts of the world where fossil fuels didn't form because the right conditions didn't exist. For fossil fuels to form you need large amounts of biomatter to be placed in an anoxic (no oxygen) environment, and then buried and placed... | [] | [] | [
[]
] | |
57m0b4 | How do drugs which act on serotonin receptors treat disorders of the nervous system? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/57m0b4/how_do_drugs_which_act_on_serotonin_receptors/ | {
"a_id": [
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"score": [
44,
302,
2,
4,
26,
6
],
"text": [
"This is *really really* generalized. What exactly do you mean when you say \"disorders of the nervous system?\" As in: specific type... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Autoreceptor",
"https://upload.wikimedia.org/wikipedia/commons/0/01/Dopamine_and_serotonin_pathways.png"
],
[],
[]
] | |
268sky | Will an EMP effect electronics that are powered off and have no iron derivatives in them? | askscience | http://www.reddit.com/r/askscience/comments/268sky/will_an_emp_effect_electronics_that_are_powered/ | {
"a_id": [
"chowp6l"
],
"score": [
5
],
"text": [
"Yes. An electromagnetic pulse would be picked up by any conductor within range. In some cases, like a piece of rebar holding down a parking lot bumper, this doesn't really matter too much; the rebar could care less about having a (comparatively... | [] | [] | [
[]
] | ||
1gcu3y | Why do milk or sugary drinks cause thicker saliva? | askscience | http://www.reddit.com/r/askscience/comments/1gcu3y/why_do_milk_or_sugary_drinks_cause_thicker_saliva/ | {
"a_id": [
"caj6ici",
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],
"score": [
6,
10
],
"text": [
"At work, so I don't have time to write up a full reply, but I'd say it's a combination of the secretions that form your saliva changing, and residues of the drink left behind in your mouth, combining with saliva and causin... | [] | [] | [
[],
[]
] | ||
1z8eps | would democracy benefit if lobbying and lobbyists were made illegal in the united states? | I've always heard that lobbyists are the bane to democracy because of how they sway political decisions with money and/or handouts and I have always wondered if there is anything they do that might be considered beneficial for America as a whole or if I have been mislead. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1z8eps/eli5would_democracy_benefit_if_lobbying_and/ | {
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"text": [
"The issue isn't lobbyis... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
] | |
vehse | Could intelligent life that evolved in an aquatic environment develop sophisticated technology? | askscience | http://www.reddit.com/r/askscience/comments/vehse/could_intelligent_life_that_evolved_in_an_aquatic/ | {
"a_id": [
"c53spo4",
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"score": [
100,
16,
4,
2,
2,
7
],
"text": [
"I don't think there is an answer to this question that isn't speculation. ",
"Warning: pure speculation follows...\n\nWhy presume... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
bsl0hw | if i place both waters into a bucket from where the two oceans meet but don’t mix, why do they mix just fine in the bucket? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bsl0hw/eli5_if_i_place_both_waters_into_a_bucket_from/ | {
"a_id": [
"eonzxkf",
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"score": [
2,
2,
12
],
"text": [
"I don't understand the question. Can you rephrase it?",
"Why do you say they don't mix where they meet?",
"The idea of \"two oceans meet but don't mix\" is more or less a myth. Most of the pic... | [] | [] | [
[],
[],
[
"https://www.youtube.com/watch?v=a4N4yQB_B4c"
]
] | ||
1kp4td | Is every neuron in the body indirectly connected to every other neuron? | Or, asked in another way, are there any neurons in the body that are not somehow connected to the central nervous system? Also, is there an estimate of the average degree of separation between two randomly selected neurons? | askscience | http://www.reddit.com/r/askscience/comments/1kp4td/is_every_neuron_in_the_body_indirectly_connected/ | {
"a_id": [
"cbr8iop"
],
"score": [
2
],
"text": [
"There are nerve cells like Ganglions; Ganglions are collections of nerve cell bodies outside the central nervous system and their nuclei are used for collections of neurons inside. However, these ultimately are used as part of the signals to th... | [] | [] | [
[]
] | |
4aeaev | why do some people have the mindset that only a race that is "in power"/majority can be racist? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4aeaev/eli5_why_do_some_people_have_the_mindset_that/ | {
"a_id": [
"d0zlpkk"
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"score": [
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],
"text": [
"This is part of the jargon used in sociology, ethnic studies, in related fields, where it is useful to distinguish between oppression of groups with low social status versus the general concept of racial prejudice. Unfortunately, some people do n... | [] | [] | [
[]
] | ||
2hgghp | the black hole mathematical debunk. | If black holes don't exist what are those things in the middle of most galaxies and the things that bends light and have insane gravitational pull? Have we just always misunderstood what black holes are or are they really non existent? ELI5 please :)
Also, should I just post this to /r/space?
Edit: _URL_0_ | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2hgghp/eli5_the_black_hole_mathematical_debunk/ | {
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"Basically, physicists work with two different sets of theories. Quantum mechanics for the very small, and relativity for the very large. One of the biggest mysteries at the moment is that these two theories are not compatibl... | [] | [
"http://www.iflscience.com/physics/physicist-claims-have-proven-mathematically-black-holes-do-not-exist"
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[],
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eslkdp | if fevers are how our bodies fight infections and over the counter pain meds like tylenol are fever reducers, do they make it take longer to get better? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/eslkdp/elif_if_fevers_are_how_our_bodies_fight/ | {
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"Yes. A fever (within reason) is a good thing. Tylenol makes you feel better, a fever helps you get better.",
"Obligatory not a medic... | [] | [] | [
[],
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"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4703655/"
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6u6ale | Do larger people have larger organs? | I'm an above average male, 6 foot 7 inches and 240ish pounds. Are my internal organs like my liver or heart significantly larger than someone like my s/o who is 5 foot 5 inches and 130 pounds?
| askscience | https://www.reddit.com/r/askscience/comments/6u6ale/do_larger_people_have_larger_organs/ | {
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"Yes. It all starts with your skeleton. A larger frame needs larger muscles to move it. Larger muscles will need more nourishment. This leads to a larger digestive tract and a circulatory system with mo... | [] | [] | [
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31lv8u | Have other countries ever tried to sanction the United States government for its foreign policy acts? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/31lv8u/have_other_countries_ever_tried_to_sanction_the/ | {
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"The Russian boycott of the 1984 Olympics in LA might fit your criteria. The US boycotted the olympics in he USSR because of Russia's invasion of Afghanistan. The USSR responded 4 years later by boycotting the LA OlympicsThe ... | [] | [] | [
[],
[
"http://www.icj-cij.org/docket/?sum=367&p1=3&p2=3&case=70&p3=5"
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4km2f0 | How did scientist succeed to create an acoustic black hole ? | askscience | https://www.reddit.com/r/askscience/comments/4km2f0/how_did_scientist_succeed_to_create_an_acoustic/ | {
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"Very good question!\n\nFirst off, there are two very different things that could be referred to as acoustic black holes. The first is called a \"[Sonic Black Hole](_URL_7_),\" and this is made by having a fluid that moves faster than the speed o... | [] | [] | [
[
"https://www.youtube.com/watch?v=wGIZKETKKdw",
"http://www.acs.psu.edu/drussell/Demos/refract/refract.html",
"http://discovermagazine.com/2010/jan-feb/079",
"https://en.wikipedia.org/wiki/Superfluidity",
"http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2441123",
... | ||
7dhmez | how is polyester soft when it's basically plastic? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/7dhmez/eli5_how_is_polyester_soft_when_its_basically/ | {
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"From my understanding- fiber size. Bending a solid steel cylinder is a lot more difficult than bending a woven steel cable. The fabric might be essentially plastic, but it's a bunch of small plastic threads knit together.... | [] | [] | [
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5ln4lt | the concept of falsifiability. i just can't understand it. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ln4lt/eli5_the_concept_of_falsifiability_i_just_cant/ | {
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"You have to be able to prove something is false to be able to prove it's true. \n\nExample A: I say that I can run faster than you. We race. I either beat you, or you beat me in the race. That is falsif... | [] | [] | [
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azj47h | in movies and tv shows that have fake pop music, where do they get the songs? | I'm watching an episode of a crime-of-the-week show that revolves around the murder of a pop star. You hear snippets of her music throughout the episode and it got me thinking.
I know for big movies like A Star Is Born that have full songs, they hire a songwriter. But for smaller budget movies and single TV show epis... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/azj47h/eli5_in_movies_and_tv_shows_that_have_fake_pop/ | {
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"Sometimes archived, sometimes a small band doing it free for exposure. Sometimes from a site, there are free royalty-free ones but even a small studio can afford the subscription only ones. \n\nAs an amatuer filmaker, I also... | [] | [] | [
[],
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2svb0i | What is the most realistic documentary/drama/film that you've seen which reflects how medieval people actually looked? | I'm not just talking about costume, I'm talking about complexion, teeth, hair.etc
Whenever I watch a medieval drama I'm always a bit put off by how adaptions everyone is perfect. Even the lowliest peasants are well groomed and fresh faced.
I can accept nobility keeping up appearances with perfect hair and attire, o... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2svb0i/what_is_the_most_realistic_documentarydramafilm/ | {
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"The film version of *The Name of the Rose*.",
"It's a misconception that people in the Middle Ages walked around dirty all the time. While they did not bathe regularly, washing one's face and hands was a common, daily th... | [] | [] | [
[],
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6fo343 | Today is the 73rd anniversary of D-Day: what was the main factor for Allied victory? | Was it the flaws of the Wehrmacht? Was it because the plans of the generals were too successful ? Was it because the numerical advantage of the allies? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6fo343/today_is_the_73rd_anniversary_of_dday_what_was/ | {
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"Logistics and economics.\n\nThe overall GDP of the Allies, with the US in the war, was much greater than of the Axis. Moreover, the Allies knew how to play to their logistical strengths. The US cranked out more tonnage in new merchant ships than,... | [] | [] | [
[]
] | |
6qn4it | What was the shortest recorded distance between two opposing trenches during WW1? | I recently read that during WW1 on the western front the average distance between two opposing trenches was 200-300 meters "...but sometimes much shorter than that." So I was wondering what the shortest recorded distance is. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6qn4it/what_was_the_shortest_recorded_distance_between/ | {
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"Multiple Australian historians (from Ekins, Carlyon and even Bean himself) have cited localised areas in the AIF's area of operations (so \"British\" sectors) distances as short as 50-60 yards in some cases. Not a Western Front example but the d... | [] | [] | [
[]
] | |
1p0fe5 | why do some websites only show you the price of an item after you put it in your cart? | For instance, on Amazon and MicroCenter, a few TV's have the price listing as "Add to cart to see the price." What is the benefit of this? Wouldn't those websites get more consumers to purchase their product if the discounted price was blatantly listed instead? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1p0fe5/eli5_why_do_some_websites_only_show_you_the_price/ | {
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"Prices are searchable if they're published. Search engines can't get into your cart.\n\nThis practice typically follows agreements with suppliers that dictate the publication of non-MSRP pricing.",
"They do that to avoi... | [] | [] | [
[],
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lensq | Why don't we pull energy from the ionosphere like Tesla suggested? | I remember reading about [Tesla's wardenclyffe tower](_URL_0_) some time ago, and how he had this grand plan to build these domes all around the world - to provide the world with free power.
Has anyone explored this energy source since? If not, why? | askscience | http://www.reddit.com/r/askscience/comments/lensq/why_dont_we_pull_energy_from_the_ionosphere_like/ | {
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"AFAIK Tesla built that tower for _transmitting_ power wirelessly. And we do transmit power wirelessly by bouncing it off the ionosphere, in long-wave radio transmissions. \n\nAs ex... | [] | [
"http://i.imgur.com/PQB0x.jpg"
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[
"http://www.edisontechcenter.org/AC-PowerHistory.html"
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[],
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"http://www.edisontechcenter.org/AC-PowerHistory.html"
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y9pau | Seems like a lot of the pictures coming from the Curiosity Rover are colour corrected. What colour would Mars be to the naked eye? | askscience | http://www.reddit.com/r/askscience/comments/y9pau/seems_like_a_lot_of_the_pictures_coming_from_the/ | {
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"The Mars sky would look reddish to the human eye, or at least that's the best approximation. [Due to how digital photography works](_URL_0_), it can actually be pretty difficult to tell sometimes. \n\nThey believe it would be reddish due to the a... | [] | [] | [
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"http://www.badastronomy.com/bad/misc/hoagland/mars_colors.html",
"http://www.agu.org/pubs/crossref/2006/2006JE002687.shtml",
"http://www.sciencemag.org/content/306/5702/1753"
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5jxgx2 | (Biology) How is it someone can be allergic to shrimp but not any other seafood? | askscience | https://www.reddit.com/r/askscience/comments/5jxgx2/biology_how_is_it_someone_can_be_allergic_to/ | {
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"[Allergies occur when your immune system reacts strongly to an epitope (protein shape) that isn't actually harmful](_URL_0_).\n\nSimilar species contain many proteins that are highly homologous (same sequence, evolutionarily descended from the p... | [] | [] | [
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"http://health.howstuffworks.com/diseases-conditions/allergies/allergy-basics/allergy.htm"
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sf22f | Could a space vehicle, such as the Shuttle, eliminate its need for a heat shield if it reduced its orbital speed via thrust, and plummeted back to earth via gravitational pull alone? | Atmosphere provides the drag to reduce re-entry speed, and I know rocket braking would be highly inefficient, as it requires twice as much rocket fuel, but it would work, right? | askscience | http://www.reddit.com/r/askscience/comments/sf22f/could_a_space_vehicle_such_as_the_shuttle/ | {
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"Even if it started falling from an altitude of 400 km with zero horizontal speed, it would still be going about 2500 m/s (5500 mph) by the time it reached 100 km, which is quite fast, and would still require some kind of hea... | [] | [] | [
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9g35ez | if bleach removes color from fabric/surfaces, how come the sponges i use to scrub with bleach don't end up all faded and splotchy? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9g35ez/eli5_if_bleach_removes_color_from_fabricsurfaces/ | {
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"text": [
"Have you been sucking the bleach off the sponge? ",
"Bleach lifts stains out of natural fibres, while synthetics with colour as part of their makeup resist.\n\nTake cotton and polyester for example.\n\nTake a sample of e... | [] | [] | [
[],
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gnbl7 | Will we have Caprica style virtual reality in our lifetime? | I'm talking about the headset style, fully immersive virtual reality à la Caprica and Virtuality. | askscience | http://www.reddit.com/r/askscience/comments/gnbl7/will_we_have_caprica_style_virtual_reality_in_our/ | {
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"I haven't watched Caprica, but I'm assuming that you mean nearly-completely convincing representations of the world generated in real time. This is very difficult to put odds on. I don't work on interfaces, and I don't know a ton about what's hap... | [] | [] | [
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23rrrh | how do stores constantly get away with false advertising? | Example: The smoker friendly in my town has a sign that says something along the lines of "Lowest Priced Cigerettes Allowed by Law", then you go across the street and get a pack of pall malls for 70 cents cheaper. Just wondering how they can get away with that.
Edit: Thanks for the information everyone, and the interes... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23rrrh/eli5_how_do_stores_constantly_get_away_with_false/ | {
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"Well, they get away with it because whatever they are saying is not false.\n\nPerhaps when they say \"cigarettes\" they mean particular brands and Pall Malls isn't one of them. \n\... | [] | [] | [
[],
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a6jxeb | Was it common to play dead in Middle Age wars in Europe? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a6jxeb/was_it_common_to_play_dead_in_middle_age_wars_in/ | {
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"As a follow up question, what would happen to you if it was discovered that you were playing dead?",
"It's not impossible, but it would be a poor decision if you wanted to have a good chance of survival. The dead and ... | [] | [] | [
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2gorhk | Would a glass with a textured inside help a carbonated drink last longer before going flat? | Watching the bubbles rise in my glass, I wonder if they might take a little longer if they had a firmer purchase on the glass itself. | askscience | http://www.reddit.com/r/askscience/comments/2gorhk/would_a_glass_with_a_textured_inside_help_a/ | {
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"Arguably, a textured glass would make your soda go flat faster. The irregular geometry would promote nucleation sites for the CO2 bubbles. To make your drink stay carbonated longer, the smoother the ... | [] | [] | [
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24aub3 | On a tactical level, did infantry in feudal Japan (from the ashigaru to the samurai themselves) use battle tactics and formations? If so, what did they do? | I'm a fan of the Total War series and I played both Shogun titles, but I remember reading somewhere that samurai would simply charge into battle at their lord's command. This still doesn't address how the generals operated non-samurai units, though. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/24aub3/on_a_tactical_level_did_infantry_in_feudal_japan/ | {
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"They did use formations. At the onset of the Sengoku Jidai, spears replaced mounted archery as the dominant form of fighting on Japanese battlefields. I don't know if you've ever fought with a spear but one on one it's a bit difficult to use a... | [] | [] | [
[]
] | |
f87odq | why is it that when one eats quickly, they get a stomachache ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/f87odq/eli5_why_is_it_that_when_one_eats_quickly_they/ | {
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"Your tummy and intestines need time to sort out and process what you're eating. Like on an assembly line, if the speed of the line is too quick for each station to properly assemble or modify the item, the final product has too much or too little... | [] | [] | [
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1jvmqp | What is the most complex entity whose central nervous system can be currently simulated by a computer? | We can simulate so-called [cortical columns](_URL_0_). What is the most complex entity that we could map and simulate now? The linked article suggests a bumble-bee but has it ever been done? | askscience | http://www.reddit.com/r/askscience/comments/1jvmqp/what_is_the_most_complex_entity_whose_central/ | {
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"The answer really hinges on what you mean by \"simulate\". Let's start with the basics: how does one simulate a single neuron?\n\nThere are mathematical models that have been developed to describe how the average cell body ... | [] | [
"http://www.artificialbrains.com/blue-brain-project"
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[
"http://en.wikipedia.org/wiki/Hodgkin%E2%80%93Huxley_model",
"http://en.wikipedia.org/wiki/Long-term_potentiation",
"http://en.wikipedia.org/wiki/Hebbian_theory"
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"http://www.scholarpedia.org/article/Stomatogastric_ganglion"
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4xqvwm | Greek inscriptions | There are dozens of collections of ancient Greek inscriptions from stone slabs (stelai), ostraca (potsherds), and pottery. As only an amateur historian knowing only a small amount of ancient Greek, this looks like a secret world of knowledge I never knew existed. But it seems like this world is solely visited by classi... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4xqvwm/greek_inscriptions/ | {
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"The standard collections of translated Greek inscriptions from the Archaic and Classical periods are:\n\n* R. Meiggs/D. Lewis, *A Selection of Greek Historical Inscriptions to the End of the Fifth Century BC* (revised ed. 1989)\n\n* C.W. Fornara,... | [] | [] | [
[]
] | |
4dmkf6 | what is the basis of 'open source' when referring to games, i generally see this comment about older games. | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4dmkf6/eli5_what_is_the_basis_of_open_source_when/ | {
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"Open source refers to the license used for the distribution of the software/game/intellectual-property. Typically open-source means that you can modify and and redistribute the software as long as you retain attribution to former others and also... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Comparison_of_free_and_open-source_software_licenses"
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tur3p | how a video game fits on a disk when only 15 songs can fit on it | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/tur3p/how_a_video_game_fits_on_a_disk_when_only_15/ | {
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"Can you give a specific example? ",
"The biggest difference, at least with games and CDs today, is that musi... | [] | [] | [
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"http://www.hellandheavennet.com/music",
"http://www.neillcorlett.com/psf/",
"http://karmasociety.net/filefrmt.pdf"
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[]
] | ||
5dypa2 | In terms of a percentage, how much oil is left in the ground compared to how much there was when we first started using it as a fuel? | An example of the answer I'm looking for would be something like "50% of Earth's oil remains" or "5% of Earth's oil remains". This number would also include processed oil that has not been consumed yet (i.e. burned away or used in a way that makes it unrecyclable) Is this estimation even possible?
Edit: I had no idea ... | askscience | https://www.reddit.com/r/askscience/comments/5dypa2/in_terms_of_a_percentage_how_much_oil_is_left_in/ | {
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"http://www.space.com/17638-how-big-is-earth.html",
"http://zebu.uoregon.edu/disted/ph162/l4.h... | |
4kzaoi | why do amish think that 17th century had an ideal technology for a pure christian life? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4kzaoi/eli5why_do_amish_think_that_17th_century_had_an/ | {
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"d... | [] | [] | [
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"http://www.amazon.com/Riddle-Culture-Center-Anabaptist-Studies/dp/080186772X/ref=sr_1_1?s=books&ie=UTF8&qid=1464187679&sr=1-1&keywords=the+riddle+of+amish+culture"
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[],
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"http://mennoniteusa.org/",
"https://en.wikipedia.org/wiki/Amish",
"http://men... | ||
5kl2s2 | why is heart failure such a quick death when suffocation takes so much longer under the exact same circumstances? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5kl2s2/eli5_why_is_heart_failure_such_a_quick_death_when/ | {
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"You're probably thinking of cardiac arrest, not heart failure. Cardiac arrest is when the heart stops pumping blood, heart failure is when the heart can't keep up with the body's oxygen needs.\n\nWhen your heart stops, your... | [] | [] | [
[],
[]
] | ||
3kqu2i | how exactly do you use tumblr | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3kqu2i/eli5_how_exactly_do_you_use_tumblr/ | {
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"text": [
" > we all seen those tumblr posts with funny replies in layers\n\nThose are from the old site layout, they no longer exist. The replies are now in a standard list form.\n\n----\n\nWith Tumblr, you create a user account. Each user can create mult... | [] | [] | [
[
"ezprodigy.tumblr.com/liked",
"http://tumblr.com",
"ezprodigy.tumblr.com"
]
] | ||
5ng6er | alimony in the us | As an Australian this a very backwards system. Why does an ex have to keep paying for them until they get remarried, can't they get a job themselves? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ng6er/eli5_alimony_in_the_us/ | {
"a_id": [
"dcb8js1"
],
"score": [
3
],
"text": [
"Alimony laws *very much* vary from place to place, state to state. Long-term alimony is largely a historical artifact now, apart from celebrity cases. \n\nThe reason behind alimony was that in more traditional marriages, one spouse (usually the... | [] | [] | [
[]
] | |
1ha1zw | college and university in the usa. | What's the difference between College and University? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1ha1zw/eli5_college_and_university_in_the_usa/ | {
"a_id": [
"casanpj",
"casao27",
"casap4f",
"casg1d1"
],
"score": [
6,
5,
2,
2
],
"text": [
"They can be used either way in most contexts nowadays. Essentially it comes down to prestige. University sounds more formal, usually denotes more programs, more opportunities, and ... | [] | [] | [
[
"http://grammarist.com/usage/college-university/"
],
[],
[],
[]
] | |
9fzlps | what causes enclaves and exclaves to form? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9fzlps/eli5_what_causes_enclaves_and_exclaves_to_form/ | {
"a_id": [
"edoj16e",
"e60ixd5",
"e60j45r",
"e60vx6h"
],
"score": [
2,
2,
2,
2
],
"text": [
" Enclaves may have been created for a variety of historical, political or geographical reasons. Some areas have been left as enclaves by changes in the course of a river.\n\n \nIn... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/Sykes%E2%80%93Picot_Agreement"
],
[],
[]
] | ||
4r9qn8 | how does the body deal with 9,600 calories, 1,260 grams of fat & 54,600 milligrams of sodium at one time? (hot dog contest) | [Link](_URL_0_)
Joey Chestnut just ate 70 hot dogs in 10 minutes. Not just the physical part of it, but how would does the body deal with that much food and the nutritionals involved? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4r9qn8/eli5how_does_the_body_deal_with_9600_calories/ | {
"a_id": [
"d4zev3j",
"d4zzih6",
"d50ef5e"
],
"score": [
65,
3,
2
],
"text": [
"Most likely he pukes much of that back up. If you watch an eating competition, they all run to the port o potty's right after. So you are really getting in say 60 to 100 fl oz (volume measure) of hotdo... | [] | [
"http://www.mercurynews.com/sports/ci_30089167/san-joses-joey-chestnut-makes-hot-dog-eating"
] | [
[],
[
"https://www.reddit.com/r/askscience/comments/4ra09i/joey_chestnut_ate_70_hotdogs_in_10_minute_today/d4zncqg"
],
[]
] | |
5tx2eo | Special Relativity: If an object accelerates at a constant rate, does the progressively increasing time dilation cause an asymptote for the moving objects time? | So, I was looking at what would happen as an object accelerated at a constant rate - say, 300 km/s^2. From what it would appear from my math, the object would experience increasing levels of time dilation (from the perspective a stationary observer).
A system of (relatively) stationary observers would watch the clo... | askscience | https://www.reddit.com/r/askscience/comments/5tx2eo/special_relativity_if_an_object_accelerates_at_a/ | {
"a_id": [
"ddppt6n",
"ddq66f9"
],
"score": [
23,
6
],
"text": [
"The situation you're interested in is worked out [here](_URL_0_). Specifically, see equation 5.",
"man.. I can't even begin to wrap my head around questions like this. \n\nI don't understand time from a physics perspect... | [] | [] | [
[
"http://aether.lbl.gov/www/classes/p139/homework/eight.pdf"
],
[]
] | |
39lg7t | When/how did France acquire its reputation as a nation with an embarrassing military history? | Looking at France's military history, it doesn't seem terrible. They had some catastrophic moments certainly (Napoleon's invasion of Russia and the existence of Vichy France come to mind), but those are easily offset by their great moments (their performance in the First World War, their role in the American revolution... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/39lg7t/whenhow_did_france_acquire_its_reputation_as_a/ | {
"a_id": [
"cs4bhgo",
"cs4oa7y"
],
"score": [
4,
3
],
"text": [
"Check the FAQs section for more answers.\n\nEssentially it came about as a result of the Fall of France. The Simpsons has Willie the Groundskeeper calling the French \"Cheese Eating Surrender Monkeys\" in c. 1995, so somewhe... | [] | [] | [
[],
[
"https://en.wikipedia.org/wiki/World_War_I",
"https://en.wikipedia.org/wiki/Algerian_War",
"https://en.wikipedia.org/wiki/First_Indochina_War",
"https://en.wikipedia.org/wiki/World_War_II",
"https://en.wikipedia.org/wiki/Suez_Crisis",
"https://en.wikipedia.org/wiki/Franco-Prussian_Wa... | |
3ygpnh | Why didn't Phillip 1 bring Sparta into the Greek fold? | Just left the Field Museums new Greek exhibit and I never knew Phillip didn't conquer Sparta. Why not? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3ygpnh/why_didnt_phillip_1_bring_sparta_into_the_greek/ | {
"a_id": [
"cydgnsh"
],
"score": [
3
],
"text": [
"You're thinking of Philip II, Philip I was the third Argead king of Macedon and reigned back in the Archaic Period. There's a number of previous threads on this subject. [Here's one I wrote myself, though there are any others](_URL_0_), although ... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/2twssz/why_did_alexander_the_great_not_conquer_sparta/"
]
] | |
8zmqs2 | What happened to the Aral Sea? | askscience | https://www.reddit.com/r/askscience/comments/8zmqs2/what_happened_to_the_aral_sea/ | {
"a_id": [
"e2k09ux"
],
"score": [
11
],
"text": [
"A rapid increase in the amount of water diverted from the two rivers which are the primary sources of water for the Aral Sea (the Amu Dar'ya and Syr Dar'ya) for irrigation purposes starting in 1960 led to a dramatically declining water balance (... | [] | [] | [
[
"https://www.annualreviews.org/doi/pdf/10.1146/annurev.earth.35.031306.140120"
]
] | ||
cpa0j6 | at what speed does your eyes move when you look somewhere else. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cpa0j6/eli5_at_what_speed_does_your_eyes_move_when_you/ | {
"a_id": [
"ewo2tgf",
"ewo6mpe"
],
"score": [
78,
8
],
"text": [
"It depends on where you're looking. More specifically, how far your eye has to move to go from one thing to the other.\n\nThe top angular speed attainable by the eye is about 900 degrees per second--so to look from as far ... | [] | [] | [
[],
[]
] | ||
8e176c | During WWII, how did the SS concentration camp guards fair psychologically with the crimes they were committing? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8e176c/during_wwii_how_did_the_ss_concentration_camp/ | {
"a_id": [
"dxs7pft"
],
"score": [
6
],
"text": [
"While it does not deal with \"SS concentration camp guards\" but rather reserve police, Browning's _Ordinary Men_ is by far the best work for insight into this that I know of. It is based off a case study of a reserve police batallion tasked with... | [] | [] | [
[]
] | |
dp98rb | how do cats purr? i know why they do it, but for the life of my i can't figure out how my cat makes her entire body vibrate when she's happy. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dp98rb/eli5_how_do_cats_purr_i_know_why_they_do_it_but/ | {
"a_id": [
"f5tewd5"
],
"score": [
5
],
"text": [
"Basically, when they feel content, happy, scared, or any of the feelings that can cause purring, their brain sends signals to their laryngeal muscles, also known as the Voice Box, and make the muscles vibrate rapidly. Then when the cat breathes i... | [] | [] | [
[]
] |
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