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4n82kg
why are f1 cars so flimsy?
Every single time I've seen Formula One, at least or car has tapped something slightly and had bits flying off everywhere. I'd have imagined they would have been built a bit sturdier for the safety of the driver, especially at the speeds they go, so why do they break so easily?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4n82kg/eli5_why_are_f1_cars_so_flimsy/
{ "a_id": [ "d41lwp7", "d41mk90", "d41msf3" ], "score": [ 11, 6, 2 ], "text": [ "They're built to be extremely light because weight will slow the car down. Also, the speeds at which they drive makes impact a lot worse than going a regular speed.", "While the exterior parts like...
[]
[]
[ [], [], [] ]
bq31gc
why are we groggy when we first wake up?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/bq31gc/eli5_why_are_we_groggy_when_we_first_wake_up/
{ "a_id": [ "eo0rtc8", "eo0s0a7", "eo0shnl", "eo0tfcs", "eo0tlm7", "eo0u3pm", "eo0uncw", "eo0vogh", "eo0vt7p", "eo0vtz4", "eo0vysf", "eo0w7sf", "eo0x1ao", "eo0xhga", "eo0yow5", "eo0z51c" ], "score": [ 279, 33, 122, 32, 152, 6,...
[]
[]
[ [], [], [], [], [], [], [], [], [], [ "https://www.livescience.com/21653-brain-chemicals-sleep-paralysis.html" ], [ "https://www.elitedaily.com/p/does-dehydration-affect-your-sleep-lack-of-water-def-affects-your-sleep-science-says-13098272", "https://en.wikipedia.org/wiki/Vasopress...
3j4krk
why are anti abortion groups also typically against contraceptives when contraceptives would prevent abortions?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3j4krk/eli5_why_are_anti_abortion_groups_also_typically/
{ "a_id": [ "cum7ca9", "cum7d4v", "cum7evt", "cum7l2s" ], "score": [ 2, 2, 2, 2 ], "text": [ "Many religious people believe that the fertilization event is the work of God, and that either party interrupting His work is sinful.", "Well, I don't know if it is typical. Bu...
[]
[]
[ [], [], [], [ "www.acog.org" ] ]
1z28p0
why does our blood change colors after it is exposed to air?
I ~~know~~ mistakenly believed it's red because hemoglobin contains iron. Does exposure to the air cause the oxygen in blood to leave or something? ~~Also, if our blood is red because of iron, why isn't it more of an orange like most forms of iron oxide (rust)?~~ Edit: correction
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1z28p0/eli5_why_does_our_blood_change_colors_after_it_is/
{ "a_id": [ "cfpv0cu", "cfpvems" ], "score": [ 2, 4 ], "text": [ "Blood isn't red because of iron. It is red because hemoglobin contains the heme group, which happens to be red. The heme group consists of a porphyrin ring and an iron center, and even without the iron center it is still int...
[]
[]
[ [], [] ]
1q5vj0
sea level
Elevation and altitude are determined in relation to a datum we call "sea level". But how is this datum determined? I ask because there is not a truly *level* sea. There are waves. There are tides. There are wet and dry seasons. There are differing levels between bodies of water (e.g. Pacific and Atlantic on either si...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1q5vj0/eli5_sea_level/
{ "a_id": [ "cd9i3ek" ], "score": [ 3 ], "text": [ "The strict scientific definition of \"sea level\" is called the Geoid:\n\n_URL_0_\n\nIt is fairly difficult to measure, but it *is* specific." ] }
[]
[]
[ [ "http://en.wikipedia.org/wiki/Geoid" ] ]
5frp8e
is there a reason why silica gel says "do not eat", while lots of other things that you shouldn't eat don't have that label?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5frp8e/eli5_is_there_a_reason_why_silica_gel_says_do_not/
{ "a_id": [ "damhkmm", "dams0a1" ], "score": [ 19, 3 ], "text": [ "Silica gel isn't really bad for you. The \"Do Not Eat\" is because those silica gel packets are often packaged with water-sensitive food, and humans aren't always smart enough to understand that not everything in a food pa...
[]
[]
[ [], [] ]
17144q
why my car won't start when it's cold out
I've tried Googling it, but all the automotive terms and car part speculation are really confusing.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/17144q/eli5_why_my_car_wont_start_when_its_cold_out/
{ "a_id": [ "c817vr2" ], "score": [ 3 ], "text": [ "Your battery uses a chemical reaction to produce the electricity needed to run your car. When it's cold out this reaction slows down, decreasing power output.\n\nYour engine oil also gets thick when cold. It's harder to move engine parts throug...
[]
[]
[ [] ]
3rdwzd
why does it seem like every website i log into wants my cell phone number for security reasons?
Is it really for security, or are they trying to get our phone numbers for some other reason?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3rdwzd/eli5_why_does_it_seem_like_every_website_i_log/
{ "a_id": [ "cwn5uns", "cwn60df", "cwn69jc" ], "score": [ 6, 3, 2 ], "text": [ "Companies are tracking and profiling you. Your cell phone connects you to an account. They get paid more for targeted ads rather than general ads. \n\nAnd hey, it's also a more secure method of contacti...
[]
[]
[ [], [], [] ]
79o845
why do insects go through this huge metamorphosis process instead of being born close to finished like mammals do ?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/79o845/eli5_why_do_insects_go_through_this_huge/
{ "a_id": [ "dp3go1c" ], "score": [ 10 ], "text": [ "The idea is that different generations of the insect can exploit different resources, expanding the total available food supply. For example, the larvae of a butterfly might eat leaves of one plant, but the adults might eat nectar of 5 other pl...
[]
[]
[ [] ]
3tiwwi
; what are the hand motions that symphony music composers often do with that stick?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3tiwwi/eli5_what_are_the_hand_motions_that_symphony/
{ "a_id": [ "cx6jjte", "cx6kejr", "cx6kskr", "cx6onaz" ], "score": [ 4, 2, 9, 4 ], "text": [ "There are specific patterns associated with certain time signatures, so player can know where they are in a bar by watching the conductor. There are also standard interpretations o...
[]
[]
[ [], [], [], [] ]
5xkxdo
why can cool drinks stay "cool" longer than hot drinks in the same insulated travel container, for example, an insulated tumbler or thermos.
Many insulated containers advertise around 10-15 hours for something to stay cool, while only 4-6 hours for something to say hot, even if you prep the container by making it the same temperature as the contents before sealing. In an attempt to prolong desired temperature retention. I thought the increased delta of the ...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5xkxdo/eli5_why_can_cool_drinks_stay_cool_longer_than/
{ "a_id": [ "deivcut", "deivhcy", "deivja8", "dej6y52" ], "score": [ 33, 12, 5, 3 ], "text": [ "My guess would be the difference between ambient and what it is you're trying to keep temperature controlled. A nice, cold drink may be at maybe 35-40°F. Ambient in a temperature...
[]
[]
[ [], [], [], [ "http://www.middleschoolchemistry.com/lessonplans/chapter2/lesson3" ] ]
21vmwp
why is killing and eating whales worse than killing and eating cattle, monkeys, or, for that matter, dogs?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/21vmwp/eli5_why_is_killing_and_eating_whales_worse_than/
{ "a_id": [ "cggxe8d", "cggxgur", "cggxm7e" ], "score": [ 18, 4, 5 ], "text": [ "We can harvest cattle without destroying the species.\n\nWe can't farm whales.", "And people view whales as highly intelligent. And I can comfirm from working on a dairy farm in Idaho, cows are dum...
[]
[]
[ [], [], [] ]
5gba0a
why aren't people buying obscene amounts of venezuelan currency and sitting on it until it gains value again?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5gba0a/eli5_why_arent_people_buying_obscene_amounts_of/
{ "a_id": [ "daqvz7d", "daqw80q", "daqwe93" ], "score": [ 2, 2, 2 ], "text": [ "You're on the right track. There's no guarantee the economy will recover. It could all just implode, and the money would be worthless. Whatever government filled the void would basically hit the \"reset...
[]
[]
[ [], [ "https://en.wikipedia.org/wiki/Self-fulfilling_prophecy", "https://en.wikipedia.org/wiki/Economic_bubble" ], [] ]
e8bs7z
so cosmic rays can affect computers and memory can it have the same effect on neural activity in the brain?
When a cosmic ray strikes a memory chip it can cause a bit flip or memory error can the same event effect electrical activity in the brain?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/e8bs7z/eli5_so_cosmic_rays_can_affect_computers_and/
{ "a_id": [ "faaeqa1", "faafylm", "fab6p51" ], "score": [ 5, 2, 2 ], "text": [ "Cosmic rays affecting computer memory on earth is largely theoretical. Most don't make it through the atmosphere, and the ones that do would have to hit a RAM chip in just the right way in order to fli...
[]
[]
[ [], [], [] ]
2i7dld
why (in cooking) is steak, pork and turkey left to rest, whereas fish isn't?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2i7dld/eli5_why_in_cooking_is_steak_pork_and_turkey_left/
{ "a_id": [ "ckziqcw" ], "score": [ 2 ], "text": [ "You shouldn't let them rest. Is obsolete cooking advice. \n\n_URL_0_\n" ] }
[]
[]
[ [ "http://amazingribs.com/tips_and_technique/mythbusting_resting_meat.html" ] ]
4m1hg9
why can't cell phones just use wi-fi to connect?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4m1hg9/eli5_why_cant_cell_phones_just_use_wifi_to_connect/
{ "a_id": [ "d3rqsxi", "d3rqwro" ], "score": [ 3, 2 ], "text": [ "You're missing the right carrier. T-Mobile and Sprint have this option already and I believe AT & T should have it soon if they haven't rolled it out. You need to have one of their newer phones though.", "yeah, the $40 a...
[]
[]
[ [], [] ]
6b0lak
why does the human eye experience the wagon wheel effect?
I understand the film aspect with frames per second, but I want to understand why the human eye--which does not work in frames but continuous light--experiences this effect.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6b0lak/eli5_why_does_the_human_eye_experience_the_wagon/
{ "a_id": [ "dhixagd" ], "score": [ 3 ], "text": [ "Many types of artificial light flicker rapidly, making a stroboscope. Every flash makes a \"frame\" of sorts. If those \"frames\" line up such that a reverse rotation is a visually closer match, it causes the wagon-wheel effect. It's in the light...
[]
[]
[ [] ]
ctsgn2
why do some buildings look really cool, but seem really impractical, ie having gaint holes in them?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/ctsgn2/eli5_why_do_some_buildings_look_really_cool_but/
{ "a_id": [ "exnhcm7" ], "score": [ 7 ], "text": [ "Can't speak for every building, but those little design quirks can actually serve very practical purposes. For example, you pointed out that some buildings have giant holes in them. That can actually counteract excess swaying in the wind.\n\nHere...
[]
[]
[ [ "https://youtu.be/ebx5Y5qOmTM" ] ]
awb5uh
why do the forces/speed when you’re in the passenger seat/back seat feel so much more severe than in the drivers sea?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/awb5uh/eli5_why_do_the_forcesspeed_when_youre_in_the/
{ "a_id": [ "ehlaey4", "ehlb9wz", "ehlfc01" ], "score": [ 24, 2, 7 ], "text": [ "I'm pretty sure it's because when you're in the driver's seat you're operating the vehicle, you're in control of the forces and speed and your body automatically compensates, knowing what you're about ...
[]
[]
[ [], [], [] ]
2tn0tg
why when i wear a go pro and walk; it's really shaky, but my own vision isn't.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2tn0tg/eli5_why_when_i_wear_a_go_pro_and_walk_its_really/
{ "a_id": [ "co0gldj", "co0gtef", "co0hbh9" ], "score": [ 19, 8, 2 ], "text": [ "Your eyes ate not stationary like a camera lens. Eyes move around.", "It's a mix of the fact that your eyes basically have suspension in the socket so they move to compensate for your head bobbing ...
[]
[]
[ [], [], [] ]
okzb2
why is kauai the least developed of the hawaiian islands?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/okzb2/eli5_why_is_kauai_the_least_developed_of_the/
{ "a_id": [ "c3i482o" ], "score": [ 6 ], "text": [ "Here are some reasons I've found from reading, and living in HI.\n\n* Lack of land. Kauai is not very big, and much of it is uninhabitable, or difficult to reach. Edit: kauai is nearly as big as Oahu, sorry. But still less land)\n* Lack of pre...
[]
[]
[ [] ]
byblwg
how do symbiotic relationships develop between two different animal species over time?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/byblwg/eli5_how_do_symbiotic_relationships_develop/
{ "a_id": [ "eqftyrj" ], "score": [ 3 ], "text": [ "Symbiosis has evolved enough times across the tree of life that it's hard to make any broad generalizations about how these relationships develop. In a lot of cases though, it probably works pretty similarly to any other kind of natural selectio...
[]
[]
[ [ "https://yaledailynews.com/blog/2018/02/06/yale-researchers-show-that-mutualism-can-come-from-parasitism/" ] ]
1mrdjf
why does an object in free fall reach terminal velocity but a bullet shot straight down doesn't?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1mrdjf/eli5_why_does_an_object_in_free_fall_reach/
{ "a_id": [ "ccbweq2" ], "score": [ 9 ], "text": [ "It would. Given enough distance, a bullet would *slow down* to its terminal velocity." ] }
[]
[]
[ [] ]
46yzjk
by the known laws of nature, is it theoretically possible to go back in time? if so, how could it be done?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/46yzjk/eli5_by_the_known_laws_of_nature_is_it/
{ "a_id": [ "d08w4e4", "d08wquc", "d0953ac" ], "score": [ 12, 2, 12 ], "text": [ "From everything we know, no. It violates the causality postulate (obviously).\n\n > Causality is one of the most fundamental and essential notions of physics. Causal efficacy cannot propagate faster t...
[]
[]
[ [], [], [] ]
405hmv
a circle is 360°. is that arbitrary? could we divide a circle by 100?
Thanks guys, that's a shitton more info than I was hoping for!
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/405hmv/eli5_a_circle_is_360_is_that_arbitrary_could_we/
{ "a_id": [ "cyrmeas", "cyrmemh", "cyrmfnz", "cyrmhk1", "cyrmmkv", "cyrozs3", "cyrqlb9", "cyrr6k2", "cyrrdud", "cyrrjv8", "cyrsduh", "cyrsy8m", "cyrtf3y", "cyrtfps", "cyrtw2d", "cyrtx0u", "cyru24h", "cyruqhl", "cyrw08i", "cyrwdw8", "c...
[]
[]
[ [], [], [], [], [], [], [], [], [ "https://en.wikipedia.org/wiki/Radian" ], [ "xvideos.com" ], [], [], [], [], [], [], [], [], [], [ "http://lastdayscalendar.tripod.com/2f4a4430.gif" ], [ "https://en.wikipedia.org/wiki/Sexagesimal" ], [], [], [],...
441q1y
this popular magic trick
_URL_0_ I've even seen this trick in person, and still don't know how it works! Also, I don't know what it's called so I can't google it :c
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/441q1y/eli5this_popular_magic_trick/
{ "a_id": [ "czmp8ll", "czmpbpt", "czmpcg7", "czmpenz", "czney3u" ], "score": [ 6, 29, 2, 13, 2 ], "text": [ "The person doing it has a device you can buy at a magic store that fits on his thumb and looks like a thumb.", "He's using a fake [thumb tip](_URL_0_). ...
[]
[ "http://i.imgur.com/ZGrfDkR.gifv" ]
[ [], [ "https://en.wikipedia.org/wiki/Thumb_tip" ], [], [ "https://en.wikipedia.org/wiki/Thumb_tip" ], [] ]
5l0ok0
why can't we store "electrostatic discharge electricity" in a battery?
Hello An electrostatic discharge lasts for a few nanoseconds but can go up to 30kV. What makes it impossible for current engineers to generate such electricity by friction of some dielectricum and store all that electricity? There must be some ways to design circuitry that converts that burst of 30kV to a source that ...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5l0ok0/eli5_why_cant_we_store_electrostatic_discharge/
{ "a_id": [ "dbs1q3g" ], "score": [ 3 ], "text": [ "You can store static electric discharges, there just isn't much of a point. That shock you feel after you rub your woolly socks on some carpet is really a *tiny* amount of energy. It may be 30kV but it's at around 0.005 amps.\n\nYou're better off...
[]
[]
[ [] ]
1osxn5
would it be possible for everyone to use just one language?
I guess it would a lot easier for everyone.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1osxn5/eli5_would_it_be_possible_for_everyone_to_use/
{ "a_id": [ "ccv8yje", "ccv9yqx" ], "score": [ 4, 4 ], "text": [ "I certainly don't think so. Without thinking about it too much, I can think of the following reasons:\n\n- Good luck getting everyone to **agree** on one!\n- **Religious texts might not be translated into the new language** ...
[]
[]
[ [], [] ]
6k90rk
why do mobile websites have a "click here to continue reading" button?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6k90rk/eli5_why_do_mobile_websites_have_a_click_here_to/
{ "a_id": [ "djk6e9h" ], "score": [ 2 ], "text": [ "Usually it's so they can bait you with part of the article and show you ads on that page, then make you load another page to read the rest of the article ...where they show you more ads. The more ads they show you the more money they make so 2 pa...
[]
[]
[ [] ]
94dpmq
how do anti-bacterial and germ resistant coated surfaces work?
I've seen signs of labels saying a surface of various items claim they are coated in a germ and anti-bacterial resistant substance (i.e. recently I found one on a toilet flushed handle). How does this coating repel or kill germs without needing to constantly be reapplied?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/94dpmq/eli5_how_do_antibacterial_and_germ_resistant/
{ "a_id": [ "e3k9vfu", "e3kcgjj" ], "score": [ 14, 5 ], "text": [ "Certain metals can kill bacteria. Zinc, Cobalt, and Copper are just a couple.\n\nThe way it works is similar to how if you eat a large amount of copper you would get copper poisoning. But since bacteria are small if they ar...
[]
[]
[ [], [] ]
1lb5mr
how the film industry works.
This all started when I went to see The World's End at about an [8]. During the opening credits, there were three different companies credited with "producing" it. They were Relativity Media, Big Talk Productions, and Working Title Films. Before that though the credits also said it was a Focus Features and Universal Pi...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1lb5mr/eli5_how_the_film_industry_works/
{ "a_id": [ "cbxhyph", "cbxi56r", "cbxk9yr", "cbxothu" ], "score": [ 4, 5, 2, 2 ], "text": [ "The three smaller studios probably financed the film. Often times smaller and independent films are funded by outside investors so the bigger studios don't take the hit if it fails...
[]
[]
[ [], [], [], [ "http://techblog.netflix.com/2012/12/complexity-in-digital-supply-chain.html", "http://www.businessweek.com/articles/2012-09-13/how-movie-studios-make-money", "http://industry.bfi.org.uk/media/pdf/h/b/Film_Value_Chain_Paper.pdf" ] ]
a0lrhg
what is the difference between data and regular old information?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/a0lrhg/eli5_what_is_the_difference_between_data_and/
{ "a_id": [ "eailud8", "eaingkx" ], "score": [ 2, 3 ], "text": [ "Interesting that you place information on a lower level of prestige than data. I would say that data points, taken together, allow you to draw conclusions that become information. For example, monthly profits. Each month's p...
[]
[]
[ [], [] ]
3fh8h4
why is there a statue of limitations for rape but not for murder?
Lol statute* but seriously in my opinion murder could be a rapist traumatizing a victim then they like kill themselves or completely f their life up no?... or can prosecutors not prove the suicide was because of the rape?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/3fh8h4/eli5_why_is_there_a_statue_of_limitations_for/
{ "a_id": [ "ctokzv8", "ctolro8", "ctoosrv", "ctorisp" ], "score": [ 8, 2, 2, 2 ], "text": [ "ELI5 isn't really the place to debate the relative merits of different legal philosophies. But, the simple answer is that murder is considered a more heinous crime than rape by the...
[]
[]
[ [], [], [], [] ]
392iab
are other abimals more inbred than humans? are other animals aware of who their siblings/cousins are and do the instinctively know not to mate with them?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/392iab/eli5_are_other_abimals_more_inbred_than_humans/
{ "a_id": [ "crzscfc" ], "score": [ 3 ], "text": [ "It depends on the animal. Most of the \"higher\" animals have some sort of aversion to their siblings and/or parents unless they are specifically inbred (such as in breeding programs). However, insects really don't, for two reasons. First, insect...
[]
[]
[ [] ]
3t4rlw
why does food always seem to be getting more expensive even though farming technologies are improving?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3t4rlw/eli5_why_does_food_always_seem_to_be_getting_more/
{ "a_id": [ "cx33fdp", "cx33gam" ], "score": [ 3, 2 ], "text": [ "You should be asking why food is so expensive in Western Countries because the high price of food is something that I did not notice while traveling to Southeast Asia, specifically Taiwan and China. The prices of basic food ...
[]
[]
[ [ "https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Wax_apple.png/1024px-Wax_apple.png" ], [ "https://en.wikipedia.org/wiki/Flavr_Savr" ] ]
21n15g
who really holds the power in america: the electorate, congress, president, or illuminati?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/21n15g/eli5who_really_holds_the_power_in_america_the/
{ "a_id": [ "cgem2ao", "cgem4o3" ], "score": [ 2, 2 ], "text": [ "There's this whole system of checks and balances that ensures whoever can buy out two or (preferably) all three of the branches can make the laws.\n\nBecause corporations are people and money is free speech and you can't tak...
[]
[]
[ [], [] ]
43ytcx
what is a "mirrorless" camera, and how is it better/different than a regular digital camera?
I have been seeing ads lately for mirrorless cameras. What is different about these cameras? Do they have better focusing or image quality? Are they lighter weight?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/43ytcx/eli5what_is_a_mirrorless_camera_and_how_is_it/
{ "a_id": [ "czm25fv", "czm6fj0", "czmji7p" ], "score": [ 19, 4, 2 ], "text": [ "Broadly, there are three types of consumer camera:\n\n- \"compact\" digital cameras, with a fixed (non-detachable) lens\n- \"mirrorless\" cameras, with a larger sensor and swappable lenses\n- \"SLR\" c...
[]
[]
[ [ "http://i.imgur.com/kiqpVro.jpg" ], [], [] ]
6zszmk
the whole matrix story line
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6zszmk/eli5the_whole_matrix_story_line/
{ "a_id": [ "dmxuejg", "dmxuqdf", "dmxutb2", "dmxuulv", "dmxv0ku", "dmxv3jg", "dmxvfzk", "dmxw87y" ], "score": [ 7, 264, 2, 9, 5, 6, 3, 2 ], "text": [ "This is far longer than an ELI5 but it does detail the entire story covered by the 3 movie...
[]
[]
[ [ "http://www.sparknotes.com/film/matrix/summary.html" ], [ "http://matrix.wikia.com/wiki/Prime_Program", "http://matrix.wikia.com/wiki/The_One", "http://matrix.wikia.com/wiki/Machine_War", "http://matrix.wikia.com/wiki/The_Oracle", "http://matrix.wikia.com/wiki/01", "http://matrix.w...
3qjpws
what exactly are satellites used for, and what can we potentially use them for in the future?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3qjpws/eli5_what_exactly_are_satellites_used_for_and/
{ "a_id": [ "cwfr3ig" ], "score": [ 2 ], "text": [ "Simple answer - pretty much anything you want to have orbiting the Earth 'could' be put on a satellite. The International Space Station is a satellite! \n\n\nCurrently, they are used for all sorts, several have telescopes on them, so you don't ne...
[]
[]
[ [] ]
6uxfak
how can a touch screen tell the differences between gestures such as a touch or a swipe, or a prolonged press? [engineering]
Basically, I want to know how a touch screen doesn't mistaken a tap for a swipe and vice versa.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6uxfak/eli5_how_can_a_touch_screen_tell_the_differences/
{ "a_id": [ "dlw3h23", "dlw3r5g" ], "score": [ 2, 9 ], "text": [ "It measures where you're touching over time. It senses a touch at a specific spot that disappears immediately afterward? That's a tap. A touch in a specific spot that stays there and doesn't disappear or move for a bit? ...
[]
[]
[ [], [] ]
49vm8y
baby on board stickers
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/49vm8y/eli5_baby_on_board_stickers/
{ "a_id": [ "d0v8c84", "d0v8cp6", "d0v8g2n", "d0v8o2i", "d0v90ur" ], "score": [ 2, 4, 8, 3, 2 ], "text": [ "You aren't missing anything. I would assume it's meant for other drivers so that maybe they would drive more carefully around the vehicle. ", "It's just...
[]
[]
[ [], [], [], [], [] ]
69xhn2
what are peptides in skin care and what do they do?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/69xhn2/eli5_what_are_peptides_in_skin_care_and_what_do/
{ "a_id": [ "dha341z" ], "score": [ 4 ], "text": [ "They are amino acids that can penetrate skin easily and send signals to the brain that the cells require proteins to do their job more effectively.\n\nFor example:\n\nPeptide: \"Hey! We need more collagen!\"\n\nBrain: \"k\"" ] }
[]
[]
[ [] ]
1fu2dw
why has the james web telescope gone so far over budget? it was supposed to cost $500 million originally, but now it will cost $8.8 billion (or more).
_URL_0_ What has caused this massive ballooning of its cost from the estimate to the actual cost?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1fu2dw/eli5_why_has_the_james_web_telescope_gone_so_far/
{ "a_id": [ "caduy84" ], "score": [ 2 ], "text": [ "It's a pretty bold new telescope, why? \n\n1) it's orbit is wonky, it will sit at a Lagrange point not really orbit earth (to keep it cooler)\n\n2) it's mirror, oh Lordy it's mirror. It's mirror or should I say mirrors are several hexagon mirrors...
[]
[ "http://en.wikipedia.org/wiki/James_Webb_Space_Telescope#Reported_cost_and_schedule_issues" ]
[ [] ]
dzacte
how do electric motors generate movement from electricity?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/dzacte/eli5_how_do_electric_motors_generate_movement/
{ "a_id": [ "f86a1n4", "f86aaby", "f86scsy", "f86x8d6", "f86y73t", "f871lf1", "f874fnj" ], "score": [ 19, 3, 4, 2, 2, 3, 2 ], "text": [ "They use magnetism. You suspend a electro magnet on a axle inside a magnetic field. It will move to a balanced po...
[]
[]
[ [], [], [], [], [ "https://youtu.be/0PDRJKz-mqE", "https://youtu.be/LAtPHANEfQo", "https://youtu.be/N8LUOTQKXlk", "https://youtu.be/bCEiOnuODac" ], [], [ "https://en.m.wikipedia.org/wiki/Induction_motor", "https://youtu.be/bGtJQoIcUDo" ] ]
6d2dhl
how do massive trends suddenly blow up overnight?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6d2dhl/eli5_how_do_massive_trends_suddenly_blow_up/
{ "a_id": [ "dhz7us0", "dhz8b8h", "dhz9nk2" ], "score": [ 2, 4, 2 ], "text": [ "Imagine all these circles that you do not belong to, but overlap with yours. \n\nTrends become huge in circles apart from yours... maybe amongst a certain ethnic group, or very young kids, or only in ma...
[]
[]
[ [], [], [ "https://www.amazon.com/dp/B000OT8GD0/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1" ] ]
2zsi6g
cell phone carriers
I never understood this, a lot of people talk about 'unlocking' or 'switching' carriers on their cellphones, what do they mean by 'carrier'? Because, here in my country a phone is not bound to a telecom company, all we have is phone credits (purchasable by money) and a SIM card (gotten from a telecom company). All we h...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2zsi6g/eli5_cell_phone_carriers/
{ "a_id": [ "cplvw6y", "cplvxs0" ], "score": [ 11, 4 ], "text": [ "The Telecom company you mention in your post is your carrier.\n\n", "The US has a weird system where instead of paying the full purchase price of an expensive phone, you instead get the phone for much less, and the cell...
[]
[]
[ [], [] ]
dfesv5
how does something like a complex theoretical equation get turned into a real world application?
This is such a brain-smoother for me that I don't even know how to really easily word the question, so I'll try to give an example of what I mean: In some books I've read in the past, there have been things where they've said stuff along the lines of "If we figure out the necessary equation, we could potentially fold ...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/dfesv5/eli5_how_does_something_like_a_complex/
{ "a_id": [ "f32npdk", "f32nxdn", "f32rvv1", "f35isnq" ], "score": [ 43, 7, 5, 2 ], "text": [ " > real world application?\n\nLet's... Use a real world application as an example, rather than FTL travel. \n\nLet's say you want to build a wall, and to prevent it from falling o...
[]
[]
[ [], [], [ "https://en.wikipedia.org/wiki/Eureka_(word\\)#Archimedes" ], [] ]
1dzqhe
why doesn't every company do the "hollywood accounting" tricks to make no official profits? wouldn't it save them money in the same ways it saves hollywood money?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1dzqhe/eli5_why_doesnt_every_company_do_the_hollywood/
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[]
[]
[ [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [] ]
2z0o9n
why i see more porn on /r/all at 7 am than any other time of day?
Title.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2z0o9n/eli5_why_i_see_more_porn_on_rall_at_7_am_than_any/
{ "a_id": [ "cpeozdf" ], "score": [ 3 ], "text": [ "Have you considered the possibility that you are seeing the same amount of porn at 7am as throught the rest of the day but the amount of other content has been reduced because the people who post sfw content are sleeping?" ] }
[]
[]
[ [] ]
o1rc3
why do pc's have to download games while consoles do not?
This has always been at the back of my mind, and I would like to end the curiousity. Explain away my friends! Edit For Confusion: When you shove in a disk into a console, it plays automatically without the need for any downloading or waiting. On PC, you need to downloaded the game onto your harddrive. Second Edit:...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/o1rc3/why_do_pcs_have_to_download_games_while_consoles/
{ "a_id": [ "c3dok79", "c3dorqj", "c3dpe2t", "c3dpjby" ], "score": [ 3, 13, 3, 2 ], "text": [ "I'm not sure but I believe it is because the consoles already have the game's required drivers installed into it, such as the graphics and sounds. PC's, however, do not come prefa...
[]
[]
[ [], [], [], [] ]
5lt2la
when one country buys something from another country (export, import), how does the transaction work? is it like momey transfer?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5lt2la/eli5_when_one_country_buys_something_from_another/
{ "a_id": [ "dby8jc8" ], "score": [ 2 ], "text": [ "Most import and exports don't involve countries buying things, they involve companies in those countries.\n\nAnd it is pretty much like a money transfer. Company A tells their bank to send money to Company B. For a large purchase, it might be m...
[]
[]
[ [] ]
8qmpu4
how do people become cross-eyed or lazy-eyed?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8qmpu4/eli5_how_do_people_become_crosseyed_or_lazyeyed/
{ "a_id": [ "e0ke1b4", "e0km6za" ], "score": [ 5, 2 ], "text": [ "Strabismus is specifically the condition where the eyes do not align. It can be a result of improper function in the muscles of the eye, vision problems, trauma, or trouble with the part of the brain that manages eye movemen...
[]
[]
[ [], [ "https://imgur.com/pjWFFDR" ] ]
2sa1xr
what is happening at the cellular level when a body part "goes numb" from being too cold?
I understand that there is a decrease in circulation, but how does this result in a lack of sensation?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2sa1xr/eli5what_is_happening_at_the_cellular_level_when/
{ "a_id": [ "cnnj8rw" ], "score": [ 2 ], "text": [ "The blood supply to the nerves and nerve endings/receptors that mediate sensation is diminished, they get less oxygen and loose function. The nerve cells needs to constantly replenish its energy supplies through active uptake of nutrients, this r...
[]
[]
[ [] ]
3ju85a
what happens if a cemetery runs out of room?
People usually tell me, "they buy more land." But... What if there's not any proximate land available? I feel like I'm missing a huge piece of information. Am I just that naïve? Be brutal.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3ju85a/eli5_what_happens_if_a_cemetery_runs_out_of_room/
{ "a_id": [ "cusbwhh", "cusc2bz", "cusc347", "cusfwtj", "cusib5k" ], "score": [ 9, 3, 8, 2, 3 ], "text": [ "Depending on the traditions of the cemetary, they may: \n1) Dig up some bodies and stack the bones somewhere else( see the Paris catacombs) \n2) Dig up some...
[]
[]
[ [ "https://en.wikipedia.org/wiki/Old_Jewish_Cemetery,_Prague" ], [], [], [ "http://drgraveyard.com/news/" ], [] ]
1t2uf5
why do we not yet have realistic humanoid robotics? even the most advanced bipedal robots still look like a clumsy man in a space suit from a 60s sci fi show. what's the real technological factor holding robotics back?
For example, see this state of the art robot on QI: _URL_0_
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1t2uf5/eli5why_do_we_not_yet_have_realistic_humanoid/
{ "a_id": [ "ce3rbb4", "ce3rco1", "ce3rmli", "ce3s45t", "ce3ueci", "ce3wgkc", "ce40euu", "ce48tp7", "ce49ca6" ], "score": [ 2, 6, 4, 33, 2, 6, 3, 2, 2 ], "text": [ "Yes, Azimov was state of the art three years ago. For an idea of the ...
[]
[ "http://www.youtube.com/watch?v=B3gb6p_Y9-c" ]
[ [], [ "http://www.youtube.com/watch?v=J71XWkh80nc", "http://en.wikipedia.org/wiki/Uncanny_valley" ], [ "https://www.youtube.com/watch?v=5S4ZPvr6ry4&feature=youtube_gdata_player" ], [], [], [ "http://www.popularmechanics.com/cm/popularmechanics/images/SS/uncanny_valley_pg1_300x225_0...
2qdmfm
why nice looking sports cars are expensive? and why car companies creates fast cars?
My second grader asked me and I thought I would let you guys answer him. Also, why don't car companies provide average capabilities car but with the same exterior as the fancy sports car? Lamborgini with a ford focus engine, for example.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2qdmfm/eli5_why_nice_looking_sports_cars_are_expensive/
{ "a_id": [ "cn54yl0", "cn55e9o", "cn55oqy" ], "score": [ 6, 3, 2 ], "text": [ "Because nice stuff costs a lot. \n\nAnd going fast is fun. \n\nAnd for your last question, then it would be easier for the average Joe to have a fancy nice car, taking away the \"exclusiveness\" of t...
[]
[]
[ [], [], [] ]
16k8eo
why is anti-aliasing so resource-heavy?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/16k8eo/eli5_why_is_antialiasing_so_resourceheavy/
{ "a_id": [ "c7wvkxj" ], "score": [ 11 ], "text": [ "Sometimes a computer doesn't get enough information to know what to do, so it has to guess just a little. If it guesses wrong, your music might not sound right, or your game might not work just like it should. This is called \"aliasing\" and isn...
[]
[]
[ [] ]
567c95
why did the united states stop using the sr-71?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/567c95/eli5why_did_the_united_states_stop_using_the_sr71/
{ "a_id": [ "d8gwnhk", "d8gwrvt", "d8gwutu", "d8gx1q0", "d8gxic3", "d8h4kut", "d8h7a6u", "d8hd83i" ], "score": [ 11, 13, 4, 112, 28, 5, 16, 3 ], "text": [ "According to Wikipedia, politics.\n\nThe generals who understood the value of the SR-7...
[]
[]
[ [], [ "https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Initial_retirement" ], [ "https://en.wikipedia.org/wiki/Satellite" ], [], [], [], [], [] ]
3lk7q4
the economically fairest tax to all classes, sex and race in the us?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3lk7q4/eli5_the_economically_fairest_tax_to_all_classes/
{ "a_id": [ "cv6xmyd", "cv7100h" ], "score": [ 3, 5 ], "text": [ "Taxing spending (aka sales tax) is regressive. Poor people spend comparatively more of their income in purchases.\n\nTaxing income in any form is complicated by determining what counts as income. The determination of rates i...
[]
[]
[ [], [] ]
2de9vn
what's up with the "reddit ambassadors" in youtube comments?
Seriously.... Is this some sort of inside joke I'm missing?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2de9vn/eli5_whats_up_with_the_reddit_ambassadors_in/
{ "a_id": [ "cjorkz7", "cjosnjx" ], "score": [ 5, 4 ], "text": [ "People like to feel special, and like they're part of an elite club. Proclaiming \"le Reddit army is here\" tells people that the commenter is an extremely special snowflake.", "Trolls, circlejerkers & idiots with no l...
[]
[]
[ [], [] ]
ask1vr
protestants and catholic hating each other?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/ask1vr/eli5_protestants_and_catholic_hating_each_other/
{ "a_id": [ "eguwg80" ], "score": [ 6 ], "text": [ "Well, once upon a time there was just the one Christianity. There were a number of archbishops, including the one at Rome. He felt that he was superior to the others, and when there came a situation where he disagreed with the others, they split ...
[]
[]
[ [] ]
uhxwy
headphone specifications
I want to buy a pair of headphones but I do not understand the specs and what they mean. Can someone explain what to look for and what it means. **Edit:** to edit I am looking for in ear head phones.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/uhxwy/eli5_headphone_specifications/
{ "a_id": [ "c4vp0fe" ], "score": [ 3 ], "text": [ "I can try to explain it to you, but you have to know that the specifications does not tell the whole story, and you should look up some reviews of the headphones when possible.\n\nFrequency Range how deep and high pitch your heaphones can render....
[]
[]
[ [ "http://i.imgur.com/ZmoNA.png", "http://www.head-fi.org/t/588224/the-akg-k-250-history-pictures-and-a-review-of-this-forgotten-dynamic-k-340-k-241-hybrid/120" ] ]
bnkcf9
how can online games like first person shooters be so in sync across all users without hardly any delay?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/bnkcf9/eli5_how_can_online_games_like_first_person/
{ "a_id": [ "en6gr63", "en6m1no", "en6m7c9", "en6ts3m", "en73322", "en77g7n" ], "score": [ 91, 13, 3, 2, 5, 10 ], "text": [ "Fast internet and faster servers.\n\nHuman reaction times are on the order of 100ms or so. Ping time, which is round-trip packet flig...
[]
[]
[ [], [], [], [ "https://youtu.be/vTH2ZPgYujQ" ], [], [] ]
405zy4
why do women deliver on their backs?
I was at an osteopath the other day with my mum getting treated, and they mentioned childbirth. the guy mentioned how the crouching position is so much better for humans (due to human evolution), yet in most western hospitals, women are seen on a bed with legs spread, which must be so much worse for their back when del...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/405zy4/eli5_why_do_women_deliver_on_their_backs/
{ "a_id": [ "cyrpfgm", "cyrpg4h", "cyrpuxb", "cyrqh4p" ], "score": [ 5, 20, 2, 3 ], "text": [ "They don't lots of times.\nMy partner recently gave birth to twins sideways.\nSome use a special chair or on their knees. \n\nEdit: In the movies its all on the back, but then the...
[]
[]
[ [], [], [], [] ]
e3amzq
why every number to the power of 0 is equal to 1?
I'm too dumb to get it
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/e3amzq/eli5_why_every_number_to_the_power_of_0_is_equal/
{ "a_id": [ "f920qee", "f921mvf", "f9230ti", "f923ikc", "f923wjj", "f9248mc", "f924i8a", "f924mb0", "f9282vz", "f92auvr", "f92bffm", "f92cynb", "f92ectb", "f92fs8a", "f92j4jz", "f92m3v8", "f92tque", "f92vm3r", "f92xjjp", "f92zhqv", "f...
[]
[]
[ [], [], [], [], [], [], [], [], [], [], [ "graphsketch.com", "https://graphsketch.com" ], [], [], [], [], [], [ "https://en.m.wikipedia.org/wiki/Empty_product" ], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [...
czy4ho
how can co2 stay locked in a liquid and make a fizzy drink, but if you blow bubbles with a straw it doesn't?
Not sure if chemistry or physics..
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/czy4ho/eli5_how_can_co2_stay_locked_in_a_liquid_and_make/
{ "a_id": [ "ez3r16q", "ez3uxqx" ], "score": [ 3, 7 ], "text": [ "I don't actually remember very well, but I'm quite sure that for CO2 to be incorporated in a liquid it's necessary to use a certain amount of pressure that you can't create with just your lungs", "Co2 isn't saved in the ...
[]
[]
[ [], [] ]
5pqz5j
us withdrawal of the trans-pacific partnership (tpp) deal
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5pqz5j/eli5_us_withdrawal_of_the_transpacific/
{ "a_id": [ "dct3kjq", "dct46iu", "dct49m8", "dct4jov", "dct4k8o", "dct6uoi", "dct9jd4", "dctatj9", "dctbmlh", "dctbtdo", "dctbweq", "dctcv2s", "dctdtjp", "dctgbwp", "dctjo1u", "dctng2x", "dctw5s3", "dctyx7a", "dctzb2o", "dctzkx6", "d...
[]
[]
[ [], [], [], [], [], [ "http://economixcomix.com/home/tpp/" ], [], [], [], [], [], [], [ "http://www.sierraclub.org/trade/trans-pacific-partnership", "https://twitter.com/lessig/status/651778060375719936", "http://cepr.net/press-center/press-releases/dean-baker-statement-itc...
2cletn
why do companies like gm (i'm sure there are more) waste money by producing identical vehicles under two different brands? (for example, the tahoe and the yukon)
Edit - I've never had a post make it to the front page and I have been drinking and celebrating. Get mad at me for excitement but here's to you reddit, good talk.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2cletn/eli5_why_do_companies_like_gm_im_sure_there_are/
{ "a_id": [ "cjgldyw", "cjgmccm", "cjgnegr", "cjgovsr", "cjgoyxh", "cjgp3qd", "cjgp8ou", "cjgpb4g", "cjgpi54", "cjgpyk4", "cjgqfdi", "cjgqt7g", "cjgr2jn", "cjgr5c0", "cjgr5fz", "cjgr7d6", "cjgra1z", "cjgrbp3", "cjgrdw1", "cjgrekl", "c...
[]
[]
[ [], [], [], [], [], [], [], [], [], [ "http://en.wikipedia.org/wiki/Rebadging" ], [], [], [], [], [], [], [], [], [], [], [], [ "http://en.wikipedia.org/wiki/Sterling_Jewelers#Store_brands", "http://i.imgur.com/GD5EKxP.jpg" ], [], [], [], [], [], ...
2hbo4v
how was it possible for whales to evolve from land mammals to massive ocean mammals?
Did they get a blow hole mutation and start sleeping under water or something? What land mammal was it that eventually evolved into a massive ocean mammal? Why did the whale go back into the water in the first place? Why didnt other mammals do this too?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2hbo4v/eli5_how_was_it_possible_for_whales_to_evolve/
{ "a_id": [ "ckr5heb", "ckr5n19", "ckr7f0l", "ckr7z8t", "ckr8acc" ], "score": [ 35, 7, 3, 2, 3 ], "text": [ "Probably from something like seals or walrus, which spend a lot of time under water anyway. Over time, they develop the ability to spend longer and longer pe...
[]
[]
[ [], [ "https://en.wikipedia.org/wiki/Evolution_of_cetaceans" ], [], [ "http://itsmyocean.org/wp-content/uploads/2010/01/whales-graph.jpg" ], [] ]
p80b9
cells, organelles and their functions *first post*
i'm currently an online student in a vet tech program (i'm only in my 3rd week of the class, and sciences have never been easy for me to understand) and since i don't really have a classroom setting to ask these sort of questions, i thought i'd ask here. i considered asking in r/askscience but i was worried that the co...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/p80b9/eli5_cells_organelles_and_their_functions_first/
{ "a_id": [ "c3najqd" ], "score": [ 2 ], "text": [ "1. The nucleus contains the DNA that codes for proteins. In order to make the right proteins for the situation, the cells responds to cues, both from outside the cell and inside the cell. In order to react to cues (say a change in the nutrients a...
[]
[ "http://en.wikipedia.org/wiki/Organelle" ]
[ [] ]
6venxh
how are "human limits" determined in athletics and sport in general?
I often hear many people on TV, when an athlete beats or goes very close to a world record, discussing about "human limits", for example if a human could ever be capable to run 100m under 9 seconds and so on. How are "human limits" determined, and how can they make sure no one will ever overcome it?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6venxh/eli5_how_are_human_limits_determined_in_athletics/
{ "a_id": [ "dlznisk" ], "score": [ 3 ], "text": [ "I ran track in highschool and followed the scene a bit. Most of seems to come from simple observation of past history. In the example you mentioned it is just that nobody has ever passed that mark. No matter how hard people train and repeat the c...
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jt7m4
are there daytime stars we never see at night?
I'm in mid-northern latitude--I think that might be relevant. Given that the planet moves through space all year, aren't we looking at different stars overall as we go? (I know they can see different stars in the southern hemisphere than in mine.) And given that summer days are longer than nights, and I realize that...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/jt7m4/are_there_daytime_stars_we_never_see_at_night/
{ "a_id": [ "c2excjr", "c2excso", "c2eyxsd", "c2fb4xw", "c2excjr", "c2excso", "c2eyxsd", "c2fb4xw" ], "score": [ 2, 3, 2, 2, 2, 3, 2, 2 ], "text": [ "_URL_0_\n\nThe earth rotates on an axis and always points at the same spot in the sky, day o...
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[ [ "http://i.imgur.com/yj2BW.gif" ], [ "http://imgur.com/TKiHr" ], [], [], [ "http://i.imgur.com/yj2BW.gif" ], [ "http://imgur.com/TKiHr" ], [], [] ]
61zny4
why heating something up makes it easier to flatten (e.g. ironing or trouser presses)
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/61zny4/eli5_why_heating_something_up_makes_it_easier_to/
{ "a_id": [ "dfj28m4" ], "score": [ 2 ], "text": [ "Clothing is made up of fibres which are made up of long-chain polymers, which have bonds between them. Placing a hot thing on the cloth provides energy which loosens the molecular bonds, which allows them to be reformed - i.e., pressed flat.\n\nC...
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3kv8v8
why do big companies, who have a multitude of resources at their disposal, buy out smaller companies, especially apps like "summlly" which yahoo bought for $30m, instead of just making it algorithm themselves?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3kv8v8/eli5eli5_why_do_big_companies_who_have_a/
{ "a_id": [ "cv0tt82", "cv0txoy", "cv0tzl3", "cv0u5u8", "cv0uzh4" ], "score": [ 6, 2, 2, 3, 2 ], "text": [ "1. Coming up with algorithms as nice as the ones Summly came up with is not easy. If Yahoo started tomorrow it might take a team of 12 people a year to come c...
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[ [], [], [], [], [] ]
2gp45x
why does benadryl make me sleepier than otc sleeping pills.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2gp45x/eli5_why_does_benadryl_make_me_sleepier_than_otc/
{ "a_id": [ "ckl7ikq", "ckl9c2b", "cklbkm8" ], "score": [ 50, 9, 4 ], "text": [ "Benadryl (diphenhydramine) is actually the main ingredient in almost all OTC sleeping medications. You probably think it makes you sleepier because you often take benadryl when you are trying to stay u...
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[ [], [ "http://scienceblogs.com/moleculeoftheday/2006/11/08/fluoxetine-from-benadryl-to-pr/" ], [] ]
7cfsyr
how can jupiter and venus pass in the sky when one is closer to the sun and one is further from the sun than us?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/7cfsyr/eli5_how_can_jupiter_and_venus_pass_in_the_sky/
{ "a_id": [ "dppig62", "dppj6hs", "dppj7de" ], "score": [ 5, 24, 7 ], "text": [ "Perspective. They aren't passing so they can high-five each other, it just appears so despite great distances between them. ", "It has to do with relative position in the three orbits.\n\nHave a lo...
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[ [], [ "http://star.arm.ac.uk/press/2008/occul/diagram.png" ], [] ]
9xgc32
why do so many websites feel the need to show a "this site uses cookies" disclaimer message?
This seems like a recent web trend that hasn't been around that long. So why are they doing this all of a sudden? What happens when you click agree? And what is the difference between that and just clicking the x on the message?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/9xgc32/eli5_why_do_so_many_websites_feel_the_need_to/
{ "a_id": [ "e9s3v70", "e9s49cj", "e9sl4rr", "e9t1lyx", "e9te0f3" ], "score": [ 87, 86, 7, 4, 3 ], "text": [ "It's a recent requirement due to the implementation of the [General Data Protection Regulation \\(GDPR\\)](_URL_0_) in the European Union (EU) in May 2018. ...
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[ [ "https://en.wikipedia.org/wiki/General_Data_Protection_Regulation", "https://www.itgovernance.eu/blog/en/how-the-gdpr-affects-cookie-policies" ], [ "http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm" ], [], [], [] ]
1vzh95
how do modern digital clocks lose or gain time?
I don't understand or know how in the technological era we live in, digital clocks can still be fast or slow. The most accurate clocks are the 2 nuclear clocks that haven't lost a second in like 3000 years or something. So how do they lose or gain time?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1vzh95/eli5_how_do_modern_digital_clocks_lose_or_gain/
{ "a_id": [ "cex9k25" ], "score": [ 3 ], "text": [ "Most common digital clocks rely upon a crystal oscillator for their time base. These run at frequencies usually of the order of 10's of MHz (millions of cycles per second). A counter circuit \"knows\" how fast the circuit cycles, and counts off f...
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2uyrfz
could an unbreakable wire that is one atom thick slice through you and would it leave you in two separate pieces?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2uyrfz/eli5_could_an_unbreakable_wire_that_is_one_atom/
{ "a_id": [ "cocwleh", "cocwy49", "cocxl9k", "cocyajg", "cocz9y2", "cod0ofj", "cod11mj", "cod1uwf", "cod2czl", "cod2mn2", "cod2yqn", "cod34ov", "cod3egu", "cod40h2", "cod4l18", "cod4nx6", "cod4vx7", "cod5ach", "cod5m2x", "cod61u7", "c...
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[ [ "https://en.wikipedia.org/wiki/Stand_on_Zanzibar" ], [], [], [ "https://www.youtube.com/watch?v=03vIkZR2hNY&list=PLcUY9vudNKBMxm0HSZCDU7rMAWOt7zLgp&index=2" ], [ "https://www.youtube.com/watch?v=HDWr4CcNIOk#t=43" ], [], [], [], [], [], [], [], [], [], [], []...
3btfq4
why does 30 year old aged balsamic vinegar or any other aged product have an expiration date/use by date?
May or may not have used balsamic vinegar that's a month after its use by date D:
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/3btfq4/eli5why_does_30_year_old_aged_balsamic_vinegar_or/
{ "a_id": [ "cspc0d7" ], "score": [ 3 ], "text": [ "Sometimes its just required by law to have a date. Other times, like water and honey, the expiration date is more or less in regards to the container" ] }
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5vg1vq
once you intake the required/suggested amount of daily nutrients, why are you still hungry?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5vg1vq/eli5once_you_intake_the_requiredsuggested_amount/
{ "a_id": [ "de1tkrr", "de1u5v9" ], "score": [ 3, 2 ], "text": [ "It has everything to do with instincts. Why we only *need* a certain amount of food, for 99.9% of humans existence there has been a scarcity of food. Therefor the body evolved to always want food when we can get it.\n\nIn a ...
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1w3xzj
when its cold out, whats the advantage to wearing many layers as opposed to one really thick layer?
I understand that if it warms up you can take off a couple layers.... but if you know you're going to be cold no matter what, whats the point?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1w3xzj/eli5_when_its_cold_out_whats_the_advantage_to/
{ "a_id": [ "ceygx1h", "ceygx60", "ceygz8k" ], "score": [ 2, 2, 4 ], "text": [ "I don't know how about you, but I've never seen a 1 cm thick sweater.", "Multiple thin layers trap air between them. Air is a really good insulator.", "You trap air inbetween the layers. This ai...
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607a67
why are university/college classes so much bigger than high school classes? shouldn't high schools be more packed?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/607a67/eli5_why_are_universitycollege_classes_so_much/
{ "a_id": [ "df415pl" ], "score": [ 4 ], "text": [ "First, not all college courses are bigger than high school classes. Particularly when you get into third and fourth year courses in a discipline, they are frequently smaller than high school classes. The courses in college that are delivered in g...
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92w517
what is the difference between a "creative commons" license and a "all rights reserved" license?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/92w517/eli5what_is_the_difference_between_a_creative/
{ "a_id": [ "e38tf1v", "e38ti9p", "e38y0gs" ], "score": [ 16, 2, 9 ], "text": [ "[All Rights Reserved](_URL_0_) means that the copyright holder is giving notice that at any time they may decide to enforce copyright on the property.\n\nThe designation is defunct, as of the ending of...
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[ [ "https://en.wikipedia.org/wiki/All_rights_reserved", "https://en.wikipedia.org/wiki/Creative_Commons" ], [], [ "http://ericskiff.com/music", "http://www.reprisaluniverse.com/site/playreprisal/" ] ]
4qb7d7
how come most aerial fireworks are illegal to use for the general public, but can still be purchased without any sort of permit?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4qb7d7/eli5_how_come_most_aerial_fireworks_are_illegal/
{ "a_id": [ "d4rl0nj" ], "score": [ 3 ], "text": [ "The laws governing fireworks sales and usage are very much dependent on jurisdiction (e.g. local state, county, and/or municipal laws).\n\nThere are many jurisdictions in the US and other countries where the sale and usage of aerial fireworks is ...
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5zravn
how do costume shops stay in business when almost all their sales come from a few days?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5zravn/eli5_how_do_costume_shops_stay_in_business_when/
{ "a_id": [ "df0cgg2", "df0cjnc" ], "score": [ 2, 2 ], "text": [ "They do more than that though.\n\nParties, invitation creation, rental of costumes, product supply for professionals like face paints etc. You'll be surprised to learn that October only has a 15% increase of sales for the on...
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jzs1u
php and my sql
And how they relate to hosting a website. I know some stuff about computers but networking and websites are like crazy black magic to me 0_o.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/jzs1u/eli5_php_and_my_sql/
{ "a_id": [ "c2gezfx", "c2gezfx" ], "score": [ 6, 6 ], "text": [ "MySQL is a database, used for storing information in a way that makes it easy to get at particular pieces of information when you want them. It can be used for lots of things, but in this case, it's to store data to be used ...
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6ibn91
what makes honey sticky?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6ibn91/eli5_what_makes_honey_sticky/
{ "a_id": [ "dj50au5" ], "score": [ 2 ], "text": [ "Honey has lots of sugar, a little bit of protein, and a little bit of water. Sugars are naturally sticky when in liquids, and the low water content keeps honey from being slippery instead of sticky. The proteins in honey help to bind everything t...
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3k5kbp
why do people clap after an athlete stands up after an injury?
I understand it's to cheer that they can walk, but the person is still injured.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3k5kbp/eli5_why_do_people_clap_after_an_athlete_stands/
{ "a_id": [ "cuuyjmb", "cuv0fvr" ], "score": [ 6, 2 ], "text": [ "It's sort of to recognize what the athlete has given for the audience. They're out there risking serious injury for our entertainment; when they have a close call and are able to stand, we applaud to show our appreciation f...
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1qqzda
what optic sorcery is behind the "rubber pencil" trick?
on google, someone said that it moves too fast for the brain to process, but I feel like I'm moving it really slow. why?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1qqzda/eli5_what_optic_sorcery_is_behind_the_rubber/
{ "a_id": [ "cdfkbuy" ], "score": [ 3 ], "text": [ "I think there are a few things involved. I have absolutely no scientific knowledge to spout, but I'd guess its got something with how much info our eyes can process each second ie. the refresh rate.\n\nKinda along the same lines, a standard movie...
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buelx4
why do frogs cover the roads after a rain?
Every time it rains, frogs cover the road. It’s not just one or two but a lot of them. I’m not sure if it’s just where I live or if it’s common in other places as well.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/buelx4/eli5_why_do_frogs_cover_the_roads_after_a_rain/
{ "a_id": [ "epb1nie", "epby0qj" ], "score": [ 12, 5 ], "text": [ "Frogs are amphibians, which means their skin isn't a watertight fortress like yours and they're prone to drying out if they get caught out in the sun for long periods of time.\n\nSo like worms, they're taking advantage of t...
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6azdo6
why do vegans/vegetarians try so hard to find supplements to meat that look and taste like the real thing?
I know the simple answer to this would be, "It's not that they don't like the taste of meat, they just don't like the cruelty". However, I look at it as if, for example, you were once a drug addict, stopped doing drugs, but then tried to find something that looked and felt exactly like the drug, but isn't the drug. I f...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6azdo6/eli5_why_do_vegansvegetarians_try_so_hard_to_find/
{ "a_id": [ "dhik1mg", "dhik4fy", "dhik4qk", "dhiksbk", "dhikzvm", "dhiug17" ], "score": [ 5, 9, 8, 7, 6, 2 ], "text": [ "It's very simple.\n\nMeat aren't drugs. They don't have harmful effects nor they are addictive. Their production, however, involve killi...
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26i6ag
how does sunblock prevent sunburns? also, in the course of its function does it stop working because of deterioration of the active ingredients, absorption into the skin, or something else?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/26i6ag/eli5_how_does_sunblock_prevent_sunburns_also_in/
{ "a_id": [ "chrcn0p" ], "score": [ 4 ], "text": [ "They absorb uv-light and change the energy into heat. Most of them aborb uvb-light which is the light that burns but some also shield you from uva-light, the light that tans.\n\nSunscreen has many chemicals in it to prevent you from getting sunbu...
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9p3waa
what do spark plugs bits have that can break windows so easily?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/9p3waa/eli5_what_do_spark_plugs_bits_have_that_can_break/
{ "a_id": [ "e7yujfu" ], "score": [ 2 ], "text": [ "Aluminum oxide in ceramic breaks off the spark plugs and causing sharp shards, the shards focus the energy into a small point not blunt making the hit sound quiet when it hits tempered glass. Tempered glass breaks into many small bits when fractu...
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2le5xz
why exactly do we have 4 distinct seasons?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2le5xz/eli5_why_exactly_do_we_have_4_distinct_seasons/
{ "a_id": [ "cltx10y" ], "score": [ 3 ], "text": [ "Do we really have 4 distinct seasons? You have an obvious summer and winter but I would argue that fall & spring are simply the transitional periods between them. The only real difference is whether plants are starting to grow or dying off." ...
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318b0e
how does employment marijuana testing work in states that have passed it for recreational use, and can those tests be used to terminate an employee?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/318b0e/eli5_how_does_employment_marijuana_testing_work/
{ "a_id": [ "cpz8ekw", "cpz8jt5", "cpz8w8t" ], "score": [ 5, 5, 2 ], "text": [ "Employers may still fire/refuse to hire someone who tests positive for pot. Pot smokers are not considered a protected class like race and religion, so they may be fired for it. There are plenty of lega...
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46ve7e
how does the reddit hug of death work and why does it kill websites?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/46ve7e/eli5_how_does_the_reddit_hug_of_death_work_and/
{ "a_id": [ "d083nug", "d083tee" ], "score": [ 3, 6 ], "text": [ "Imagine i poke you. No big deal right? You can carry about your daily business without issue. Now imagine a million people are all trying to poke you, you ain't gonna get anything done.\n\nIt's the same when you try to acces...
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8uqcu4
what happens to unsold merchandise? (watches, clothes, etc.)
I see tons of merchandise, what happens with what doesn’t get sold?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8uqcu4/eli5_what_happens_to_unsold_merchandise_watches/
{ "a_id": [ "e1hdc0n", "e1hduqa", "e1i4uo1" ], "score": [ 3, 3, 2 ], "text": [ "Oftentimes, stores will sell their excess or surplus inventory through their own outlet store, or they will sell it to a store like Ross or $0.99 store. It depends on the item. \n\nThey may also discoun...
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5hcbtj
why do some people need braces/retainers while others do not?
I know braces aren't exactly a requirement, but I'm genuinely curious. Most of my family members have naturally straight teeth. I say I've never had braces (growing up both my cousin and I found them cute, but we never needed them). Almost all of my friends have had braces/a retainer/invisalign, and they're surprised w...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5hcbtj/eli5_why_do_some_people_need_bracesretainers/
{ "a_id": [ "daz5ro4" ], "score": [ 2 ], "text": [ "genetics.... mainly\n\nBasically our jaws shrank quite a bit in our recent evolutionary history, but number of teeth remained. Depending on your teeth size/shape they might fit nicely or not. \n\nIn other species youd probably see a selection for...
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2msnvv
how do mosquitoes bite through jeans / long trousers
How can it be that I wear jeans all day and suddenly my knee really itchy and I find I have been bitten!?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2msnvv/eli5_how_do_mosquitoes_bite_through_jeans_long/
{ "a_id": [ "cm77kmp", "cm7984w" ], "score": [ 3, 10 ], "text": [ "I'm not entomologist, but I'm pretty sure its because mosquitos poke you with their proboscises rather than \"bite\" you. They stick it in your skin and suck the blood through that, and seeing as it's quite thin it can most...
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[ [], [ "http://www.google.com/imgres?imgurl=http://bugguide.net/images/raw/R0W0Q0W0S0P0Z0MQTR0QZ0IQZ090H0QQK0QQDRE0DRKQWRJKYQYKVR40FQHQ1R50OQ3KAR7QARI09R.jpg&imgrefurl=http://bugguide.net/node/view/172006/bgimage&h=202&w=180&tbnid=pgWv5Vm48kijEM:&zoom=1&tbnh=186&tbnw=165&usg=__c...