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y981o
In a hot desert how should a canteen of water be rationed?
Often times in books and movies when a character is going through a hot desert they poor water on their head, drink it all at once, or barely drink it at all. If you're ever stranded in a hot desert and only have a canteen or two of water, how exactly is the best way to ration it?
askscience
http://www.reddit.com/r/askscience/comments/y981o/in_a_hot_desert_how_should_a_canteen_of_water_be/
{ "a_id": [ "c5tgoha" ], "score": [ 11 ], "text": [ "I'd say that pouring it over your head is just stupid if dehydration is a fear. Also, I found this:\n\n > The current rule for water use is “Ration sweat, not water.” Water rationing is an antiquated method for land travel that probably has its ...
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[]
[ [] ]
3wk5o2
Why is the Arab slave trade left out of textbooks and not thought in American schools?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/3wk5o2/why_is_the_arab_slave_trade_left_out_of_textbooks/
{ "a_id": [ "cxwswjl", "cxwuopb", "cxwwgxx" ], "score": [ 6, 11, 3 ], "text": [ "Because it's natural for history lessons taught at schools to concentrate on things that are easier for the students to relate to. The US is involved in the Atlantic slave trade; the Arab one, not so m...
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[]
[ [], [], [] ]
jq8k1
If light is affected by gravity then would the stars position in the nights sky be different from what we perceive?
In a more wordy explanation of my question, would the fact that light can be bent by gravitational forces have an effect on how we perceive the cosmos. For instance if flying on a hypothetical straight line to another star, would you have to alter your course after a period of time to account for the effects of gravity...
askscience
http://www.reddit.com/r/askscience/comments/jq8k1/if_light_is_affected_by_gravity_then_would_the/
{ "a_id": [ "c2e8stg", "c2e8w2j", "c2e8stg", "c2e8w2j" ], "score": [ 10, 9, 10, 9 ], "text": [ "Oh, yes! _URL_0_", "Sure, there are a few ways in which this can happen.\n\nFor objects like stars which are quite nearby to Earth, you'll really only see effects if there's ...
[]
[]
[ [ "http://en.wikipedia.org/wiki/Einstein_ring" ], [], [ "http://en.wikipedia.org/wiki/Einstein_ring" ], [] ]
1fcsas
when i stand far away from one person clapping i can't hear it, at the same distance i can hear 100 people clapping. why?
I was trying to explain the phenomenon to myself and although I know it to be true, I actually have no idea on a molecular level why this would be. Each individual clap has the same amplitude, why together are they louder? Eli5 because I have very poor understanding of physics.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1fcsas/eli5_when_i_stand_far_away_from_one_person/
{ "a_id": [ "ca9038x", "ca93157" ], "score": [ 8, 11 ], "text": [ "While it is not quite this simple in this case, the wave amplitudes basically add. Actually there will be some canceling, but there will be a tremendous amount of amplitude adding, and that amplitude is the loudness you hea...
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[]
[ [], [ "http://imgur.com/okyIcVs", "http://seagrant.uaf.edu/marine-ed/curriculum/images/stories/grade7/wave.jpg", "http://www.physicsclassroom.com/Class/sound/u11l2b3.gif" ] ]
9ew60f
How is louder sound different from soft sound?
Generally we say sound travels at the same speed in the air, regardless of amplitude. But in order for us to hear loud sounds, our eardrums must be pushed stronger. This, I suspect, is achieved by air molecules hitting the eardrums harder, which itself is achieved by having the air molecules move faster prior to colli...
askscience
https://www.reddit.com/r/askscience/comments/9ew60f/how_is_louder_sound_different_from_soft_sound/
{ "a_id": [ "e5sqkig", "e5sr1js" ], "score": [ 5, 3 ], "text": [ "Sound is a wave, specifically peaks and valleys of alternating pressure. The waves travel at the same speed regardless of volume, that instead depends on the medium. Higher volume means those peaks have a higher pressure.", ...
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[]
[ [], [] ]
rkp51
why everybody hates hipsters?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/rkp51/eli5_why_everybody_hates_hipsters/
{ "a_id": [ "c46l7cq", "c46lji0", "c46lk9a", "c46lprl", "c46lpuc", "c46lqvr", "c46lral", "c46lt3z", "c46ltz5", "c46ltzw", "c46lu7a", "c46luqh", "c46lvv2", "c46lwbc", "c46lxfc", "c46lz51", "c46m06z", "c46m1fh", "c46m3qv", "c46m4oe", "c...
[]
[]
[ [], [], [], [], [ "https://www.youtube.com/watch?v=lVmmYMwFj1I" ], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [ "http://www.adbusters.org/magazine/79/hipster.html" ], [], [], [], [], [], [], [], [], [], [], [], [], [], ...
41bed9
why do analysts claim the stock market is tanking because of the glut of oil? (more in comment)
I'll admit my macroeconomics class was back in the early 70's. I enjoyed it a lot, and it has been useful in understanding any number of economics ups-and-downs over the years. But I'm having trouble seeing the causality between *cheap oil* - > *stock market drop*, as claimed by so many "knowledgeable" market pundits....
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/41bed9/eli5_why_do_analysts_claim_the_stock_market_is/
{ "a_id": [ "cz10zkx", "cz178ii" ], "score": [ 3, 4 ], "text": [ "China has been the price setting buyer of oil for more than a decade, so the price of oil dropping is seen as the best predictor of how rapidly or severely China is going tits up. ", "Lower oil prices are good for most ...
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[ [], [] ]
f2s1mi
How did the power vacuum created by the fall of the western roman empire influence the events of the middle ages?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/f2s1mi/how_did_the_power_vacuum_created_by_the_fall_of/
{ "a_id": [ "fheq8dl" ], "score": [ 4 ], "text": [ "Hello! As Roman Imperial authority collapsed, the vacuum it left was more often than not filled by those in the best place to do so: local and regional leaders who in many cases were already *de facto* if not necessarily *de jure* authority figu...
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[ [ "https://www.reddit.com/r/AskHistorians/comments/espxxc/z/ffd57uh" ] ]
4a499s
How can the phase speed of a wave of light exceed C? What does this mean?
[I recently watched this video](_URL_0_) where he briefly talks about the phase speed of a wave of light exceeding C in very specific circumstances. I have never heard this before, so I was wondering if somebody could expand upon this for me?
askscience
https://www.reddit.com/r/askscience/comments/4a499s/how_can_the_phase_speed_of_a_wave_of_light_exceed/
{ "a_id": [ "d0xe769", "d0xee26" ], "score": [ 5, 4 ], "text": [ "An analogy would be if you imagine a spinning barber pole moving in space. The information, energy, etc. propagates in the wave packet (the pole), yet the speed of phase fronts (the spirals on the pole, which seem to move fa...
[]
[ "https://youtu.be/CiHN0ZWE5bk?t=10m7s" ]
[ [], [ "https://www.youtube.com/watch?v=tlM9vq-bepA" ] ]
8jdke6
Is it true that Kosovo became Albanian majority because Tito let them in?
It is just something I commonly hear from Serbians. Also, they say the Kosovo Liberation Army was essentially a malicious terrorist group.
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/8jdke6/is_it_true_that_kosovo_became_albanian_majority/
{ "a_id": [ "dyzcrtr" ], "score": [ 20 ], "text": [ "According to the 1921 Census of Yugoslavia (i.e. before the War, before Communism, before Tito), there was a clear Muslim and Albanian majority in Kosovo. We also see this in the 1931 census and, as far as I know, all subsequent censuses except ...
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[ [ "http://ask.rks-gov.net/media/2577/statistical-yearbook-2016-ang.pdf" ] ]
1mc25h
can police pursue you beyond their jurisdiction? city lines, county lines or state lines....any difference?
Out of curiosity, I live on a lake that is divided by a county line - and both Sheriff Depts occasionally patrol the waters...if they see me doing something wrong across that county line, can they cross over to pursue me? If they chase me into a new county (Dukes of Hazzard style!)..what then? I don't plan on being i...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1mc25h/can_police_pursue_you_beyond_their_jurisdiction/
{ "a_id": [ "cc7rcqc", "cc7v60v" ], "score": [ 9, 2 ], "text": [ "Police from one jurisdiction do have the legal authority to follow you into another jurisdiction. However, this is relatively uncommon, since they typically would have alerted that jurisdiction when approaching the boundary...
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[ [], [ "https://en.wikipedia.org/wiki/Immediate_pursuit" ] ]
az5pey
how much money do jewelers make knowing they have to stock their entire store with gold and diamonds?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/az5pey/eli5_how_much_money_do_jewelers_make_knowing_they/
{ "a_id": [ "ei5hf45" ], "score": [ 13 ], "text": [ "The rule in the jewelry business is \"triple key\", meaning if the wholesale price is $1000 the jeweler will usually start the price at $3000. This helps deal with the extra costs of running a jewelry store, which are quite high. This may sound ...
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[ [] ]
pq0l5
Can plants feel pain?
I understand that plants have to be sentient to at least a small degree*, but I'm wondering precisely how far that goes. I can't find anything reliable online - it seems everybody has an agenda of some sort. Is there any chance I could get some help with this? It's been bothering me lately. *Turns out this part is tot...
askscience
http://www.reddit.com/r/askscience/comments/pq0l5/can_plants_feel_pain/
{ "a_id": [ "c3rbjyt" ], "score": [ 11 ], "text": [ " > I understand that plants have to be sentient to at least a small degree, \n\n\nWhat...planet are you on? Plants do not have sentience. They do not have nerve systems. \n\nThey do have the ability to react to changes in their environment, ...
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[ [] ]
29q4a6
do we really need to spend 8 hours a day for sleep? can we found a way to not sleep and still be healthy?
Is it possible to have a pill or a machine that will decrease the amount of speed to 1 hr or no sleep at all?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/29q4a6/eli5do_we_really_need_to_spend_8_hours_a_day_for/
{ "a_id": [ "cine8it", "cinedg1", "cinee92", "cineojo", "cinfv85" ], "score": [ 5, 3, 2, 3, 2 ], "text": [ "You don't really need 8 hours of sleep. There are ways to get the rest you need, but to sleep less. You can read about it in this article:\n\n[Alternate Sleep...
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[]
[ [ "http://www.highexistence.com/alternate-sleep-cycles/" ], [], [], [], [] ]
16o28g
Examples of civilizations which have died out due to poor management of natural resources.
I am interested in examples of cultures/civilizations/communities which have either died out or suffered significant decline due to poor management of the environment or natural resources. This could include poor farming practices, over fishing/hunting, etc. One example I have encountered is the [Rapa Nui](_URL_0_) pe...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/16o28g/examples_of_civilizations_which_have_died_out_due/
{ "a_id": [ "c7xtb0g", "c7xum56", "c7xydvb" ], "score": [ 8, 2, 2 ], "text": [ "Have you read \"Collapse\" by Jared Diamond? I think you would like it.", "I'm not sure that this is exactly mismanagement, but the example seems to fit your question in most other ways and the cult...
[]
[ "http://en.wikipedia.org/wiki/Rapa_Nui_people#Interaction_with_the_Environment" ]
[ [], [], [] ]
73uuvs
why does drip coffee make me much more jittery than espresso, even when using the same amount of coffee beans for each?
For the exact numbers: Espresso: 18g beans -- > ~2oz Drip: 18g beans -- > ~10oz
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/73uuvs/eli5_why_does_drip_coffee_make_me_much_more/
{ "a_id": [ "dnt9xuh", "dnta1ta", "dntck40" ], "score": [ 2, 3, 2 ], "text": [ "Espresso is extracted fast so not as much caffeine gets transferred to coffee from the bean", "Caffeine is water soluble, in general the more water and the longer it stays in contact with the ground...
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[]
[ [], [], [] ]
646jgk
How were the calendar and days of the week followed over 500+ years ago?
In the current age of technology, I normally forget the date and maybe even day of the week sometimes unless I look at my phone. Did small towns/villages 500+ years ago keep track of dates/days of the week? Did the lay farmer or non-nobleman know on a day to day basis where in the calendar they were at the time? Who ke...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/646jgk/how_were_the_calendar_and_days_of_the_week/
{ "a_id": [ "dfzwxp1" ], "score": [ 2 ], "text": [ "[Relevant previous discussion](_URL_0_)\n\n[Slightly less relevant previous discussion, though it may lead you down different paths](_URL_1_)\n\n" ] }
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[ [ "https://www.reddit.com/r/AskHistorians/comments/1wwpzj/giant_public_calendar_in_rome/", "https://www.reddit.com/r/AskHistorians/comments/1mfsvm/what_was_the_reaction_from_the_public_when_japan/" ] ]
3tq76i
Who laid the barbed wire in No Man's Land in WWI?
Was it the Central or the Allies? Are there any accounts of doing the job?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/3tq76i/who_laid_the_barbed_wire_in_no_mans_land_in_wwi/
{ "a_id": [ "cx8m4zl" ], "score": [ 9 ], "text": [ "**TL;DR:** Both sides!\n\nThis post of mine may be of interest to you:\n\n_URL_0_" ] }
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[ [ "https://www.reddit.com/r/AskHistorians/comments/3pi3yi/where_did_the_barbed_wire_and_fences_come_from_in/cw6vr2h" ] ]
2v30hd
can you develop diabetes from just drinking a lot of alcohol (separate from eating loads of sweets)?
From what I know, alcohol breaks down into sugars, but I dont hear of many alcoholics getting diabetes. Mostly just cirrhosis. Does that just tend to manifest first?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2v30hd/eli5_can_you_develop_diabetes_from_just_drinking/
{ "a_id": [ "codzyo5", "codzzmo", "coe1l9x" ], "score": [ 4, 2, 7 ], "text": [ " > I dont hear of many alcoholics getting diabetes\n\nIt's a pretty widely recognized link - heavy drinking can lead to diabetes. I can't speculate why you haven't heard about it.", "Im an alcohol...
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[ [], [], [] ]
3faydg
What is the oldest mythic creature we have a record of?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/3faydg/what_is_the_oldest_mythic_creature_we_have_a/
{ "a_id": [ "ctniacr", "ctn5va4" ], "score": [ 22, 33 ], "text": [ "While this is still heavily debated, modern human cognition is currently believed to have arisen sometime in or slightly before the Upper Paleolithic (~50kya to ~10kya). Being fully modern humans cognitively, this means hu...
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[ [ "http://www.loewenmensch.de/lion_man.html" ], [] ]
6jugpl
why do we have to "wait" for our eyes to adjust?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6jugpl/eli5_why_do_we_have_to_wait_for_our_eyes_to_adjust/
{ "a_id": [ "djha1y7", "djhg557" ], "score": [ 3, 2 ], "text": [ "Eyes adjust by deforming the [lens](_URL_0_) in your eyes. The shape of a lens change the path of the light that goes through it. By changing the shape our eyes makes so that the light has a path that makes the image of what...
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[]
[ [ "https://en.m.wikipedia.org/wiki/Lens_(anatomy)" ], [] ]
b8nryf
How did exacly John II emperor of Byzantium ended up hiring Harald Hardrada with the rest of his fellow vikings?
So I know this eventually happened but I can’t find any source material telling how exacly this happened. I know that Harald plundered few castles in what I belive to be Sicily and then he served in army under John II. But why?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/b8nryf/how_did_exacly_john_ii_emperor_of_byzantium_ended/
{ "a_id": [ "ek0j8lx" ], "score": [ 2 ], "text": [ "Hello, can I ask at first a bit of clarification? \n\n* Is 'John II emperor of Byzantium' you mentioned correct person in question? AFAIK Emperor John II is John II Komnenos (r. 1118-43), son of famous Emperor Alexios I Komnenos, thus born more ...
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[]
[ [ "https://www.academia.edu/17544595/Harald_Bolgara_brennir_in_Byzantine_Service_Scandinavia_and_the_Balkans_Cultural_Interactions_with_Byzantium_and_Eastern_Europe_in_the_First_Millennium_AD_O.Minaeva_L.Holmquist._Cambridge_2015._P._72_82", "https://acad.carleton.edu/curricular/mars/kekaumenos.pdf" ] ]
3utm3d
why do certain things smell nice, even when they're not edible?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3utm3d/eli5_why_do_certain_things_smell_nice_even_when/
{ "a_id": [ "cxhpkk8" ], "score": [ 2 ], "text": [ "Like jet fuel or 100LL? I love those smells." ] }
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[ [] ]
1x4s7b
In the Middle Ages and Renaissance, did armies ignore borders?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/1x4s7b/in_the_middle_ages_and_renaissance_did_armies/
{ "a_id": [ "cf869w3" ], "score": [ 16 ], "text": [ "The answer depends where and when. Various Italian states denied (or attempted to deny) France and the Holy Roman Emperor access to their territory, typically if they disagreed with the war but did not want to get involved. This mandate was igno...
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[ [] ]
7jeosg
What was the typical medical aftermath for someone who has been tarred and feathered?
I'm specifically thinking during the American revolutionary period, I've always heard about people getting tarred and feathered, but I've always wondered just how bad it would be in terms of recovery. Let's say I'm a British spy who has just been outed, and as a result have been tarred and feathered in the public squa...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/7jeosg/what_was_the_typical_medical_aftermath_for/
{ "a_id": [ "dr61eyc" ], "score": [ 4 ], "text": [ "fyi, you may find these related posts of interest\n\n* [Was \"tarring and feathering\" fatal? And where in the world was it most often done?](_URL_0_) featuring /u/Goethite\n\n* [How common was tarring and feathering in the American revolutionary...
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[]
[ [ "http://www.reddit.com/r/AskHistorians/comments/1kl459/was_tarring_and_feathering_fatal_and_where_in_the/", "http://www.reddit.com/r/AskHistorians/comments/1wqyq3/i_am_living_in_colonial_boston_and_am_tarred_and/", "https://www.reddit.com/r/AskHistorians/comments/4fmpwc/tarred_and_feathered", "htt...
2jj09g
What was the USA's objective when using atomic bombs on Hiroshima and Nagasaki? Did they expect this to speed up a surrender more than Soviet invasion?
From skimming the [FAQ](_URL_0_) it seems that the Soviet invasion had a greater (though not necessarily insignificant) psychological impact on the Japanese leadership than the atomic bombs (though there seems to be some contention). Did the American leadership believe the Soviet invasion would be a more effective sur...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/2jj09g/what_was_the_usas_objective_when_using_atomic/
{ "a_id": [ "clcf4ja" ], "score": [ 2 ], "text": [ "In short, they hoped to force Japan to surrender before the Soviets could help us, if at all possible, to avoiding having to clash with them over post-war Japan, in addition to post-war Europe.\n\nAt the Yalta conference, the Soviets agreed to jo...
[]
[ "http://www.reddit.com/r/AskHistorians/wiki/wwii#wiki_the_atomic_bombs" ]
[ [] ]
1lnudd
We have superhydrophobic surfaces (ex. neverwet) Are there superoxygenphobic/superairphobic surfaces? What would that even be like?
askscience
http://www.reddit.com/r/askscience/comments/1lnudd/we_have_superhydrophobic_surfaces_ex_neverwet_are/
{ "a_id": [ "cc12vhy", "cc16u72" ], "score": [ 5, 2 ], "text": [ "Superhydrophobic surfaces utilize the entropic benefit from hydrogen bonding in water (the polarity of the partially positive hydrogen and the partially negative of the oxygen can interact to hold different molecules togethe...
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[]
[ [], [ "http://www.beilstein-journals.org/bjnano/content/figures/2190-4286-2-27-2.jpg?scale=2.0&max-width=1024&background=FFFFFF", "http://en.wikipedia.org/wiki/Electrostatic_fluid_accelerator", "http://en.wikipedia.org/wiki/Hydroscopic", "http://en.wikipedia.org/wiki/Zeolite", "http://...
afr0n2
With the Roman Empire being such a popular topic here, was a typical Roman citizen at all interested in or impressed with previous empires?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/afr0n2/with_the_roman_empire_being_such_a_popular_topic/
{ "a_id": [ "ee1t9yw" ], "score": [ 3 ], "text": [ "This is interested topic. Both Romans and Greeks were very well impressed by the remains of ancient Egypt Empire. There are several \"visitors graffiti\" in the Egypt and historians of that period talking with much respect about Egyptians and spe...
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[ [] ]
1vsuph
Why are alligators endemic to the US and China, but nowhere else?
Not long ago I was surprised to learn that alligators are endemic to just two areas of the world: the southeast United States and China. It just strikes me as odd that an animal that's been around for hundreds of millions of years would now be limited to just two areas, and that those two areas just happen to be basica...
askscience
http://www.reddit.com/r/askscience/comments/1vsuph/why_are_alligators_endemic_to_the_us_and_china/
{ "a_id": [ "cevqkca" ], "score": [ 3 ], "text": [ "This is an extremely interesting question. Fossil alligators in North America predate those in Asia, so as far as we can tell, the genus originated there and dispersed to Asia. The thing is, we don't know exactly how they did that. Neither specie...
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[]
[ [ "http://en.wikipedia.org/wiki/Arambourgia", "http://en.wikipedia.org/wiki/Hassiacosuchus" ] ]
cm7d3f
Why don't large organisms with many cells develop cancer more often?
From what I understand about cancer, it develops as a result of an error in the DNA sequence of a cell that causes uncontrollable growth. Any time a cell divides, it is at a small risk of becoming a cancerous cell just due to the random errors that come with DNA transcription/translation. If this is the case, then why ...
askscience
https://www.reddit.com/r/askscience/comments/cm7d3f/why_dont_large_organisms_with_many_cells_develop/
{ "a_id": [ "ew3f41h" ], "score": [ 5 ], "text": [ "What you described is called [Peto's Paradox](_URL_1_): why do we not see a correlation between animal size and cancer rates.\n\nThere are lots of different mechanisms of cancer suppression/avoidance in larger animals. For example, the best studi...
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[]
[ [ "https://www.ncbi.nlm.nih.gov/pubmed/27642012", "https://en.wikipedia.org/wiki/Peto%27s_paradox" ] ]
28xebn
what would happen if charging interest on loans were to be made illegal?
How would it affect economies and distribution of wealth? Would it be different if it happened: In a small country? In an economic superpower such as the US? Worldwide?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/28xebn/eli5_what_would_happen_if_charging_interest_on/
{ "a_id": [ "cifdykd", "cife4cz", "cifefqu" ], "score": [ 10, 2, 6 ], "text": [ "If a lender could not charge interest on a loan, they would have no incentive to ever give out loans because they would be essentially throwing away their money. Even though they would get back the exa...
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[]
[ [], [], [] ]
287thr
Why do people have different reactions than others to drugs? Why do some get side effects while others don't? What differences in biology could account for this?
askscience
http://www.reddit.com/r/askscience/comments/287thr/why_do_people_have_different_reactions_than/
{ "a_id": [ "ci8eya9" ], "score": [ 6 ], "text": [ "There's a lot of reasons. One of the major ones is variations in metabolic pathways or in the targets of drugs due to genetic variation. There's a whole field of science, [pharmacogenetics](_URL_0_) that studies this.\n\nBasically, we are all dif...
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[ [ "http://en.wikipedia.org/wiki/Pharmacogenetics", "http://en.wikipedia.org/wiki/V(D)J_recombination" ] ]
56tcjx
how do dry cleaners avoid spreading lice and bed bugs?
Considering how insidious they are, dry cleaners must get clothes infested with them pretty often.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/56tcjx/eli5_how_do_dry_cleaners_avoid_spreading_lice_and/
{ "a_id": [ "d8m6fsp" ], "score": [ 3 ], "text": [ "Dry cleaners use perchloroethylene to clean your clothes, it's a pretty aggressively anti-bug chemical. Now those new \"environmental cleaners\" might be a problem. Similarly, they launder shirts and dry them at super high temperatures (because...
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[ [] ]
2o87h1
what makes someone professionally good at fishing?
I assume that there are rankings in professional fishing. What qualities makes one person consistently better than another?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2o87h1/elif_what_makes_someone_professionally_good_at/
{ "a_id": [ "cmkofb2", "cml5a9y" ], "score": [ 7, 2 ], "text": [ "Probably experience and perception. I'm sure a good fisherman can tell where the fish will likely be in the lake, or how deep to go to get certain fish and what patterns they follow", "A big portion of professional fishi...
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[]
[ [], [] ]
3izlg6
Why is digital preffered over analog when digital is limited to just on and off?
I have done some basic reading on the two systems, but as in the title I cant quite wrap my head around the concept. shouldn't analogue circuits be able to transmit more information since they are capable of operating at different voltages, or is there something I am missing ?
askscience
https://www.reddit.com/r/askscience/comments/3izlg6/why_is_digital_preffered_over_analog_when_digital/
{ "a_id": [ "cuottfn", "cullb0d", "culq2eo", "culzxb0" ], "score": [ 2, 14, 3, 2 ], "text": [ "Noise is a big factor in limiting [channel capacity](_URL_0_) of either analog or digital. \n\nDigital communications can use error detection and correction. Digital can use less ...
[]
[]
[ [ "https://en.m.wikipedia.org/wiki/Channel_capacity" ], [ "https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem", "https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem" ], [], [] ]
537yv6
What do we know about related history between Bulgarians and Macedonians?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/537yv6/what_do_we_know_about_related_history_between/
{ "a_id": [ "d7qx5pc" ], "score": [ 10 ], "text": [ "I assume with ‘Macedonians’ you mean Slavic Macedonians living in the Former Yugoslav Republic of Macedonia (FYROM), who are distinct from the Greek Macedonians that live in the Greek province of Macedonia. This distinction lies at the heart of ...
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[ [] ]
3vfxhs
If motion is relative, why is it (theoretically) possible for one massive object to move in 0.5c in one direction and for another to move at the same speed in the opposite direction?
Title.
askscience
https://www.reddit.com/r/askscience/comments/3vfxhs/if_motion_is_relative_why_is_it_theoretically/
{ "a_id": [ "cxn8tju", "cxna135", "cxneu5n" ], "score": [ 22, 4, 3 ], "text": [ "It's perfectly possible for the relative velocity of two objects, as perceived by an external observer, to be greater than the speed of light. This is not a contradiction of the fact that nothing can t...
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[]
[ [], [ "https://en.wikipedia.org/wiki/Velocity-addition_formula" ], [] ]
7uvdtb
When the Byzantine Empire fell in 1453, did people at the time know that they were witnessing the fall of the Roman Empire?
After Constantinople fell, did the Ottomans and the world in 1453 know that the Byzantines were the last remnants of the former Roman Empire and that they were witnessing its death?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/7uvdtb/when_the_byzantine_empire_fell_in_1453_did_people/
{ "a_id": [ "dtookac" ], "score": [ 3 ], "text": [ "The continuation of Monstrelet's chronicle (which consists of almost everything in said chronicle after 1444; Monstrelet himself died in 1453), written by Mathieu d'Escouchy, which is in large part cribbing from the *Grandes Chronique's de Franc...
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[ [] ]
74eczr
how do certain drugs cause you to see things in high detail that aren't actually there?
It's mindboggling to me. In one of my experiences, I saw little green dots covering one of my walls. I could walk up and touch each one and they never moved. It was as if I painted them there and could only see them under the influence.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/74eczr/eli5_how_do_certain_drugs_cause_you_to_see_things/
{ "a_id": [ "dnxo1hx" ], "score": [ 6 ], "text": [ "_URL_0_\n\nHallucinogens work by shutting down neurons that have the effect of calming other cells in the visual cortex (the bit of the brain that works out what you are seeing). So these cells start firing as if they are really dealing with real...
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[]
[ [ "https://en.wikipedia.org/wiki/5-HT2A_receptor" ] ]
xrnka
On brain activity and perception: Can we slow down how we perceive time?
Hello there scientists! I'm here today to trouble you with a question that I came up with last night at work. I work 3rd shift data entry which -- as anyone who has pulled an all night study session is aware -- involves a lot of coffee and repetition. Throughout my time working that shift I have observed that whe...
askscience
http://www.reddit.com/r/askscience/comments/xrnka/on_brain_activity_and_perception_can_we_slow_down/
{ "a_id": [ "c5ozisb" ], "score": [ 2 ], "text": [ "[This](_URL_0_) Wikipedia article talks about time perception, and it's field of study. It probably doesn't answer all of your questions, but it goes over a lot of what's in your post. " ] }
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[]
[ [ "http://en.wikipedia.org/wiki/Time_perception" ] ]
b6l6du
Why does banging 2 objects together produce sound? e.g. knocking on a door
I understand at a basic level *what* sound is. I'm wonder why me rapping my knuckles on a door produces vibrating waves of air so much louder than, say, "knocking" but never actually making contact with the door. What is it about that point of contact that produces a noise?
askscience
https://www.reddit.com/r/askscience/comments/b6l6du/why_does_banging_2_objects_together_produce_sound/
{ "a_id": [ "ejlcmwa" ], "score": [ 11 ], "text": [ "Take a look at how [this drum head moves when it gets hit](_URL_0_). \n\nThe door does almost the exact same thing from your fist, but to a much smaller degree. As it shakes back and forth, it creates waves in the air that create sound. \n\nMost...
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[ [ "https://www.youtube.com/watch?v=STSWLX23xqc" ] ]
621ho8
Are we physically affected by reading left to right?
Is there any effect on our posture, eyes, neck, muscles or spine, etc?
askscience
https://www.reddit.com/r/askscience/comments/621ho8/are_we_physically_affected_by_reading_left_to/
{ "a_id": [ "dfk58nm", "dfl8bwu" ], "score": [ 2, 2 ], "text": [ "I'm also interested to know how it affects other parts of our lives, such as when crossing the road, do LR reading people look left first? Or is that more dependent on what side of the road people drive on? When looking at a...
[]
[]
[ [], [] ]
97kp02
why is it in the west hiv infections are still primarily related with homosexual activity and drug use but in africa where the vast majority of worldwide cases is it primarily spread through heterosexual transmission?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/97kp02/eli5why_is_it_in_the_west_hiv_infections_are/
{ "a_id": [ "e48w8h6", "e48wqxr", "e48wrvt", "e48wxlm" ], "score": [ 17, 2, 15, 3 ], "text": [ "\nBetter access to contraceptives in the West. Less contraceptives are used in homosexual activities because no risk of pregnancy, drug use because sharing needles. ", "Intra...
[]
[]
[ [], [], [], [ "https://www.poz.com/article/HIV-risk-25382-5829" ] ]
3kglel
how can median household incomes in an area be ~$50k but average home price be $5m?
Namely, Southampton: _URL_0_ How does this work?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3kglel/eli5_how_can_median_household_incomes_in_an_area/
{ "a_id": [ "cux7nvv", "cux8aj2" ], "score": [ 11, 2 ], "text": [ "If you read that page, you will see that the $5M home price was for a specific *part* of that area, and the average income was for the city.\n\nSo, basically, that area is a very upscale part of town that also has other, le...
[]
[ "https://en.wikipedia.org/wiki/Southampton,_New_York#Demographics" ]
[ [], [ "http://www.thepinnaclelist.com/pics/billionaire-ira-rennert-200-million-hamptons-mansion-one-of-the-largest-homes-in-america/" ] ]
3p0vek
Why was the USMC such a small military branch before 1941?
They had a superb reputation, not just during WWI, but also at Tripoli. They were formed in 1798 yet it took over 140 years for them to reach their place as a well known fighting unit.
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/3p0vek/why_was_the_usmc_such_a_small_military_branch/
{ "a_id": [ "cw2o9dh", "cw2omsp" ], "score": [ 22, 6 ], "text": [ "Well, I think your question would be better phrased as \"Why did the USMC get so *large* after 1941?\"\n\nIt should be noted that the USMC is totally unique worldwide in terms of size. Every other marine corps in history h...
[]
[]
[ [], [ "http://www.globalsecurity.org/military/ops/war-plan-orange.htm", "http://www.globalsecurity.org/military/ops/war-plan-rainbow.htm", "https://en.wikipedia.org/wiki/War_Plan_Orange", "http://www.amazon.com/Influence-History-1660-1783-Military-Weapons/dp/0486255093", "https://en.wikipedia....
1tiao3
Fire in zero oxygen
Is it possible to have a gas fire in an area that is completely void of oxygen, like a vacuum. If so, would anything be different about it?
askscience
http://www.reddit.com/r/askscience/comments/1tiao3/fire_in_zero_oxygen/
{ "a_id": [ "ce8jjrj" ], "score": [ 4 ], "text": [ "Yes, you can definitely have a fire without oxygen. However you would need a different oxidizing agent. For instance fluorine gas reacts with hydrogen gas in [such a fashion](_URL_0_). There would be a number of differences such as the maximum te...
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[ [ "http://www.youtube.com/watch?v=d2zP4jxTL4s" ] ]
4ns0n1
Did Britain plan an invasion of Norway during WWI?
Growing up in Norway, WWII has always dominated the historical narrative. What little education I've received on WWI has been limited to our neutrality, but I've often heard that if the war hadn't ended when it did, Britain would have invaded Norway in order to use the coastline. Can this be verified in any way, or is ...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/4ns0n1/did_britain_plan_an_invasion_of_norway_during_wwi/
{ "a_id": [ "d46kl94" ], "score": [ 8 ], "text": [ "There were no such plans that I'm aware of. From 1917, the Allies, mainly as a result of American pressure, began laying a mine barrage across the northern exits to the North Sea. In response to this, the Germans began diverting U-boats through N...
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[]
[ [ "https://www.reddit.com/r/WarCollege/comments/4hz4l4/bacons_folly_the_cancelled_1917_great_landing_in/" ] ]
6apbpc
what is the difference between being depressed and being bored?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6apbpc/eli5_what_is_the_difference_between_being/
{ "a_id": [ "dhgd2jq" ], "score": [ 2 ], "text": [ "Depression is a sort of relentless apathy. If you're just bored you can dispel the boredom through some form of entertainment easily enough. It's not a constant base state of your existence. Depression on the other hand saps away pleasure as well...
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[ [] ]
2ing8z
why do people still use yelp, even though they manipulate reviews?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2ing8z/eli5_why_do_people_still_use_yelp_even_though/
{ "a_id": [ "cl3p50o" ], "score": [ 2 ], "text": [ "This post is not asking for a layman-friendly explanation to something complicated or technical, so it doesn't belong here and it's been removed. Entirely subjective questions generally belong in /r/askreddit." ] }
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[ [] ]
3b0rrv
How different are mitochondria and other organelles between eukaryotic species?
Most animal cells contain the same organelles: mitochondria, endoplasmic reticulum, Golgi apparatus, and so forth. But how similar are the organelles of one species to those of another? Could a dog cell have a transplanted ER from a cat? What about from a mouse, a bird, or an insect? If they're reasonably similar, c...
askscience
http://www.reddit.com/r/askscience/comments/3b0rrv/how_different_are_mitochondria_and_other/
{ "a_id": [ "csiaape" ], "score": [ 2 ], "text": [ "In case of most organelles (Golgi apparatur, ER, peroxisomes, etc.) the main difference is in proteins so if organisms are relativelly close (in evoilutionary terms) there should be no problem in \"transplanting\" say ER of a rat into a dog cells...
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[ [] ]
1lqpka
what makes oil, natural gas, and coal sources of energy when other materials aren't?
We pump barrels of thick black oil out of the ground and eventually this turns into electricity and heat in my house. How does that happen? What makes oil, natural gas, and coal such great sources of energy when other things that come from the Earth are not?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1lqpka/eli5_what_makes_oil_natural_gas_and_coal_sources/
{ "a_id": [ "cc1tavi" ], "score": [ 3 ], "text": [ "Hundreds of millions of years ago, because our atmosphere had less oxygen in it, things did not break down as quickly as they do now. You see, nowadays, pretty much anything that is 'organic' is food for something or another. The coal, oils, and ...
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[ [] ]
2g1yr5
How do aquatic plants in places like the Chesapeake bay resist algae buildup on themselves?
I was at the bay 2 weeks ago working on a project, and I accidentally left some wire fencing in the water. When I returned a few days ago and took the wire out, there was a huge build up of algae and slimy stuff on it. How do aquatic plants, like eelgrass for example, not get covered in this and die?
askscience
http://www.reddit.com/r/askscience/comments/2g1yr5/how_do_aquatic_plants_in_places_like_the/
{ "a_id": [ "ckewgqg", "ckez8oo", "ckfesan" ], "score": [ 10, 17, 3 ], "text": [ "Believe it or not, plants wage extremely intense biological warfare. Most plants secrete compounds that are toxic to other plants and organisms, which helps them establish their roots so that they can...
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[ [], [], [] ]
63t216
What evidence is there that women trained in combat sports in Ancient Sparta or other civilizations?
I remember reading in a grade six social studies text book that women in ancient Sparta boxed and wrestled. I think this was used to illustrate how warrior-like the whole culture was. At the time it stuck with me, and then years later I became a wrestler and always wondered about my peers from ages ago. Can anyone give...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/63t216/what_evidence_is_there_that_women_trained_in/
{ "a_id": [ "dfxt2ot" ], "score": [ 4 ], "text": [ "Evidence for women participating in sport and games is significant, however, women were expressly barred from participating or viewing the Olympic Games. The Heraean Games were a single sex series of events in which women competed against each o...
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[ [] ]
2rpfvh
Other than submitting yourself to Hitler and hating on the Jews, what did the Nazi political party "stand" for? Did they believe in low taxes? Or social welfare? Communism?
I'm reading Rise and Fall of the Third Reich and I can't wrap my head around how Hitler was able to get so many Nazi members elected to congress. What were they promising the people of Germany other than making Germany strong and the arian race pure?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/2rpfvh/other_than_submitting_yourself_to_hitler_and/
{ "a_id": [ "cni34yg", "cni9sup", "cnigfd2" ], "score": [ 58, 40, 3 ], "text": [ "Well here is the 25-point party platform published in 1920. And I believe as late of as 1933 it was unchanged. I'm not sure if Hitler had it changed after that time. But by and large this was represen...
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[ [], [ "http://www.reddit.com/r/AskHistorians/comments/22ox1w/what_is_fascism/" ], [] ]
4ngsv7
when people read text, do they "hear" it in their minds?
I've been telling a certain joke to people. When I tell it verbally, everybody gets it and laughs. but when I text or msg it to them, only half of the people get it. It relies on a verbal /audio pun. Q: What do Australian astronauts eat when on a mission? A: Spice rice! This makes me think that when people read tex...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4ngsv7/eli5_when_people_read_text_do_they_hear_it_in/
{ "a_id": [ "d43q24x", "d43tm19" ], "score": [ 2, 2 ], "text": [ "Yes. It's called [subvocalization](_URL_0_). Some people \"hear\" words as they are reading them, while others don't. I know I am a subvocalizer because if I try to listen to music with words and read a book at the same t...
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[]
[ [ "https://en.wikipedia.org/wiki/Subvocalization" ], [] ]
17es0z
How are generics of high-end medications created when pharmaceutical companies can patent their chemical formulas?
askscience
http://www.reddit.com/r/askscience/comments/17es0z/how_are_generics_of_highend_medications_created/
{ "a_id": [ "c84ti3q" ], "score": [ 2 ], "text": [ "They aren't sold until the patent expires. There is a whole business in slightly altering pharmaceuticals to keep renewing the patent. " ] }
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[ [] ]
20tjku
the nonsense behind the hip-hop illuminati conspiracy theory
While I don't doubt for a second that several powerful people gather to make global decisions, I can't imagine what benefit a secret organization would have from leaving clues to their existence in art, especially hip-hop. Well there's a simple answer that it is to brainwash the masses, I don't understand what exactly ...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/20tjku/eli5_the_nonsense_behind_the_hiphop_illuminati/
{ "a_id": [ "cg6l30z" ], "score": [ 2 ], "text": [ "In a nutshell rappers keep mentioning it to make them seem more important than they are. I'm a huge Hip Hop fan, and you can see a lot of rappers are desperate for people to think they are successful (see: huge gaudy chains etc). When you see the...
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[ [] ]
2pl4h6
What happens to the gravitational potential energy of mass lost in nuclear fusion?
askscience
http://www.reddit.com/r/askscience/comments/2pl4h6/what_happens_to_the_gravitational_potential/
{ "a_id": [ "cmzjmhg" ], "score": [ 3 ], "text": [ "Nothing, since gravitation is based on energy density rather than mass. As long as the energy quanta don't leave the star, its gravitation will remain the same from the outside. When particles leave the star, its gravitation gradually decreases."...
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[ [] ]
28i8w2
why does cat food and dog food smell repulsive while the meat i eat smells delicious.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/28i8w2/eli5why_does_cat_food_and_dog_food_smell/
{ "a_id": [ "cib7daa", "cib87ze", "cib8jbs", "cib8tvq" ], "score": [ 8, 5, 9, 3 ], "text": [ "Because dog and cat food consists primarily of ground corn and other fillers which are formed into kibble, baked, and then sprayed with fat to make it palatable. Unless you're tal...
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[ [], [], [], [] ]
8n0k2o
how do scopes work? (firearms)
Might should like a stupid question but I guess that’s partly what this subreddit is for. How do scopes accurately portray where the gun is targeting despite being situated above the barrel? Edit : Thank you for all your responses!
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8n0k2o/eli5_how_do_scopes_work_firearms/
{ "a_id": [ "dzrsvy6", "dzrsxy2", "dzrt4ge", "dzrt5mx", "dzrtkrh", "dzru3zu", "dzrummb" ], "score": [ 7, 3, 4, 2, 3, 2, 3 ], "text": [ "The scopes reticle/crosshairs arnt parrell with the barrel, it aim downwards slightly and meet the travel of the b...
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[]
[ [ "https://goo.gl/images/eTTfQ4" ], [], [ "https://azweaponcraftprepper.files.wordpress.com/2015/06/targetshooting3.gif", "https://i.imgur.com/odL18u2.jpg" ], [], [], [], [ "https://qph.fs.quoracdn.net/main-qimg-bfd0a45b1498653c3e05a212dc2220da-c" ] ]
1x6b5x
how come you can "spot increase" muscle (by doing isolation movements) but you can't "spot decrease" fat?
As per title.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1x6b5x/eli5_how_come_you_can_spot_increase_muscle_by/
{ "a_id": [ "cf8h1wi", "cf8h2er", "cf8ikr0", "cf8mxrz" ], "score": [ 15, 3, 2, 3 ], "text": [ "As your question implies, if a muscle is isolated then that is the one that will grow. There is no analogous way to isolate fat for consumption. Fat loss occurs throughout the b...
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[ [], [], [], [] ]
85ktca
why are some plates and cutlery not dishwasher safe?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/85ktca/eli5_why_are_some_plates_and_cutlery_not/
{ "a_id": [ "dvy5hyd" ], "score": [ 2 ], "text": [ "Pots and pans are usually excluded because they are made of materials that react with the harsher chemicals used in a dishwasher (Just like a human hand would be damaged). As a result, they will be damaged.\n\nOther things, like some glassware, a...
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[ [] ]
1srpqh
after giving blood, is it harder to gain and/or maintain an erection?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1srpqh/eli5_after_giving_blood_is_it_harder_to_gain/
{ "a_id": [ "ce0l6pw" ], "score": [ 5 ], "text": [ "No, our bodies very quickly compensate to keep blood pressure the same despite a loss of volume. One way is to just increase the fluid content of the blood, thinning it out until more blood cells can be made. Another is to constrict the blood ves...
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[]
[ [] ]
140owq
silly math regarding supermassive black holes and average density.
So, regarding the new largest ever black hole that's been discovered... I was doing some math. Badly, likely. Can someone proof this? This is not homework, and was done for fun on another thread. The diameter of the event horizon for the new black hole was estimated to be about the size of the orbit of Neptune, or 4 l...
askscience
http://www.reddit.com/r/askscience/comments/140owq/silly_math_regarding_supermassive_black_holes_and/
{ "a_id": [ "c78tpym" ], "score": [ 3 ], "text": [ " > Now, this conflicts with things I've heard, that the average densities of supermassive black holes are in fact very light, some even lower than water.\n\nI thought this was totally wrong at first, but then I [ran the numbers myself in wolfram ...
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[]
[ [ "http://www.wolframalpha.com/input/?i=%2817+billion+solar+masses%29%2F%28%284*pi%2F3%29*%2851+billion+km%29%5E3%29" ] ]
2o8jk8
why am i "innocent until proven guilty in a court of law", but only found "not guilty" and not "innocent"?
Presumption of Innocence is "a principle that requires the government to prove the guilt of a criminal defendant and relieves the defendant of any burden to prove his or her innocence." So by definition, I am relieved of any burden to prove my innocence...not my 'not guilty-ness'. **EDIT**: Not sure what all the dow...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2o8jk8/eli5_why_am_i_innocent_until_proven_guilty_in_a/
{ "a_id": [ "cmkqkot", "cmkqnlz", "cmkrere", "cmku1b2" ], "score": [ 17, 8, 3, 3 ], "text": [ "You (and your lawyer) are under no obligation to prove your innocence, nor your \"not-guilty mess.\" The onus (burden) is on the prosecution to prove that you are guilty, and you...
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[ [], [], [], [] ]
63hdi6
growing up my mother always told me to never start a pot of boiling water from hot tap water only cold. what's the logic behind that if any?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/63hdi6/eli5_growing_up_my_mother_always_told_me_to_never/
{ "a_id": [ "dfu3q0o", "dfu3sfl", "dfu4xzi", "dfu5aie", "dfu78c1", "dfu7gmz", "dfu8oh1", "dfu9a0j", "dfu9ffz", "dfua40k", "dfua6i8", "dfuamrq", "dfuaufd", "dfub55j", "dfubzu5", "dfuc066", "dfucjgb", "dfucz0y", "dfudrll", "dfuej9u", "d...
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[]
[ [], [], [], [], [], [], [], [ "https://www.youtube.com/watch?v=HfHgUu_8KgA" ], [], [], [], [], [], [], [ "https://www.youtube.com/watch?v=HfHgUu_8KgA" ], [ "http://www.nytimes.com/2008/01/29/health/29real.html" ], [], [], [], [], [], [], [], [ "htt...
n5sn6
how the eurozone is facing economic crisis yet the euro remains stronger than the dollar.
Could exchange rates be used as a yardstick for which economy is growing faster or which one is stronger? I ask because the news I read seems to indicate that the Eurozone crisis is more dire than the US's economic problems. Is that more of a legal crisis than economic one? Boy, I'm just full of questions.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/n5sn6/eli5_how_the_eurozone_is_facing_economic_crisis/
{ "a_id": [ "c36j55t", "c36j55t" ], "score": [ 9, 9 ], "text": [ "When an economy is doing badly, governments have two common answers: make their money worth less, so people from other countries start buying their stuff, and borrow money to spend, to make sure people in their own country h...
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[ [], [] ]
3sybb4
as seen in movies, can you actually run and jump on top of and across moving train cars?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3sybb4/eli5_as_seen_in_movies_can_you_actually_run_and/
{ "a_id": [ "cx1ftbn" ], "score": [ 2 ], "text": [ "_URL_0_\n\nof course you can. Its just hilariously dangerous and theres never a reason to actually do it" ] }
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[ [ "https://www.youtube.com/watch?v=w3c67AYl0rM" ] ]
76r86o
today in britain, the sky went really orange for a few hours - why?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/76r86o/eli5_today_in_britain_the_sky_went_really_orange/
{ "a_id": [ "dog2ota", "dog2q47", "dog2s41", "dog2sik", "dog2y5d", "dog39px", "dog3p5o" ], "score": [ 15, 15, 41, 2, 3, 3, 2 ], "text": [ "Not sure if related, but Portugal and northwest Spain are having a huge number of forest fires going on causing...
[]
[]
[ [ "https://i.imgur.com/QXgeNsk.jpg" ], [], [], [], [], [], [] ]
34fb2i
How accurate is the portrayal of a sadistic slave owner whom would whip and beat his slaves for seemingly trivial stuff?
How correct is the portrayal we see in popular culture? Did slaves cost relatively a lot of money? Did it make sense to treat these human assets so harshly?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/34fb2i/how_accurate_is_the_portrayal_of_a_sadistic_slave/
{ "a_id": [ "cqv6qbj" ], "score": [ 2 ], "text": [ "There is abundant evidence that maltreatment ([whipping](_URL_1_), and [worse](_URL_0_)) of slaves was not uncommon, [NSFW](_URL_3_). However, whenever you see a movie like *Django Unchained* for example, you have to realize that whatever their...
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[]
[ [ "https://www.awesomestories.com/asset/view/Thumb-Screw-Slave-Trade//1", "http://spartacus-educational.com/USASwhipping.htm", "http://www.measuringworth.com/slavery.php", "http://spartacus-educational.com/USASwhipping.jpg" ] ]
6sq2c5
I have heard that H. P. Lovecraft came to regret his racist views later in his life. Is this true?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/6sq2c5/i_have_heard_that_h_p_lovecraft_came_to_regret/
{ "a_id": [ "dlezzuw", "dlf83h5" ], "score": [ 380, 75 ], "text": [ "It's hard to answer the question of how someone felt inside, but to the extent we can judge a man's feelings and thoughts based on his words, the answer is no, he didn't. Or, at least, he didn't state in a public way that...
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[]
[ [], [] ]
1wkwwb
how do antibiotic pills work? if there's an infection say in the mouth, how does the body know to send the medication back through the bloodstream to fight the infection? how does the body know that the medication is made to fight infection?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1wkwwb/eli5_how_do_antibiotic_pills_work_if_theres_an/
{ "a_id": [ "cf2xluq", "cf30kmh" ], "score": [ 2, 7 ], "text": [ "Your body doesn't have to \"know\" anything for it to work. It's absorbed into the bloodstream and then kills any bacteria it comes in contact with, as long as they're not too resistant. ", "The others are correct, thou...
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[ [], [] ]
8yxeg7
why is compulsive hoarding so common among baby boomers?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8yxeg7/eli5_why_is_compulsive_hoarding_so_common_among/
{ "a_id": [ "e2efwaa", "e2eg4du", "e2ehfxy", "e2ekfjq" ], "score": [ 26, 6, 6, 4 ], "text": [ "Baby Boomers are the children of those who went through the Great Depression where all supplies and food were hard to get and you had to save every scrap of everything that could ...
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[ [], [], [], [] ]
72m04o
how can the government involve itself with sports-related issues?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/72m04o/eli5_how_can_the_government_involve_itself_with/
{ "a_id": [ "dnjhxxx" ], "score": [ 2 ], "text": [ " > What is illegal (by national laws that fall under FBI jurisdiction) about a company giving individuals money?\n\nBribery of a government official is illegal. You will note that state universities are controlled by the government and the emplo...
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[ [] ]
18kc8l
the differences between a nation, a state, and a nation-state.
As many times as I've had this explained, it never sticks. I'm unashamed to ask for a simple explanation. Knowledge is power! Thank you.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/18kc8l/eli5_the_differences_between_a_nation_a_state_and/
{ "a_id": [ "c8fjl3w", "c8fqcg0", "c8fx480", "c8gvu21" ], "score": [ 42, 9, 2, 2 ], "text": [ "A nation is a group of people with several factors in common like land inhabited, religion, ethnicity, language, or culture.\n\n\nA state is the government over an area of land\n\...
[]
[]
[ [], [], [], [] ]
3mkpq1
Where in the universe does time run faster than what we currently experience here on Earth?
[deleted]
askscience
https://www.reddit.com/r/askscience/comments/3mkpq1/where_in_the_universe_does_time_run_faster_than/
{ "a_id": [ "cvfunig", "cvg0gaz" ], "score": [ 9, 4 ], "text": [ "Anywhere the gravitational field is weaker than on Earth will see time running faster. Empty space far from any objects will see the fastest time flow.", "It runs faster relative to us in places of lower gravity. For ex...
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[]
[ [], [] ]
8dc29l
why are semi-trailer trucks so deadly in crashes?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8dc29l/eli5_why_are_semitrailer_trucks_so_deadly_in/
{ "a_id": [ "dxlz8k3", "dxlz97o", "dxlzkk7" ], "score": [ 10, 3, 5 ], "text": [ "The weight difference is the biggest factor. Cars, SUVs, and pickups weigh less than 10,000 pounds. The average loaded semi weighs 80,000 pounds. Cars are also built to transport their own weight an...
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[ [], [], [] ]
2hqfsm
In 223BCE how different would the different versions of Greek spoken across the Eurasia, have been from each other? Were they all mutually intelligible?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/2hqfsm/in_223bce_how_different_would_the_different/
{ "a_id": [ "ckvi4y9" ], "score": [ 18 ], "text": [ "Koine Greek (from the Greek word for \"common\") was a variety of Greek spoken throughout the Greek world, including at the least the Greek Islands, Asia Minor, Egypt, and the Levant. The term \"koine language\" today refers to a lingua Franca u...
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[]
[ [] ]
4zq51i
Does people that have lost limbs have higher blood pressure?
askscience
https://www.reddit.com/r/askscience/comments/4zq51i/does_people_that_have_lost_limbs_have_higher/
{ "a_id": [ "d6xxf1w", "d6y2ens" ], "score": [ 13, 33 ], "text": [ "The body has mechanisms to alter or maintain blood pressure and blood flow. There are sensors that sense blood pressure in the walls of the arteries and send signals to the heart, the arterioles, the veins, and the kidneys...
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[]
[ [ "Medicine.net" ], [] ]
vrt3f
Dry erase on wood?
askscience
http://www.reddit.com/r/askscience/comments/vrt3f/dry_erase_on_wood/
{ "a_id": [ "c573chg", "c5743f6" ], "score": [ 2, 2 ], "text": [ "As wood is very porous I don't think it's possible. Depending of course on the type of wood you work with. Most woods would need to be lacquered or heavily polished to work with a dry erase marker.", "There is dry eras...
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[ [], [] ]
7yq9io
Can dogs observe and recognize aging in adult humans? Do they differentiate between young adult, middle-aged and elderly humans?
I guess I should also specify: If they do, can they make these distinctions instinctively, without training by human handlers?
askscience
https://www.reddit.com/r/askscience/comments/7yq9io/can_dogs_observe_and_recognize_aging_in_adult/
{ "a_id": [ "dujnqoy" ], "score": [ 72 ], "text": [ "I’m not sure about this specifically, but the most common way people find out whether animals and babies can differentiate between things is by using a habituation test. \n\nA habituation test is an experimental procedure where you show images ...
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[ [] ]
1tlkev
When did it become common for Europeans outside Britain/Ireland to learn English?
Was it in the last few decades or further back?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/1tlkev/when_did_it_become_common_for_europeans_outside/
{ "a_id": [ "ce98ayd", "ce99fz0", "ce9gt2s" ], "score": [ 16, 16, 2 ], "text": [ "Of interest would also be when the Irish started learning English...", "I can chip in for Sweden.\n\nNot far after the compulsory *folkskola* (people's school) was started, English became an acade...
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[]
[ [], [], [ "http://www.youtube.com/watch?v=3xvgjFtSUF8" ] ]
3r58t8
where did all the cereal prizes go?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3r58t8/eli5_where_did_all_the_cereal_prizes_go/
{ "a_id": [ "cwl066t", "cwl30l5", "cwl8tv3", "cwl98yt", "cwl9faq", "cwlauzw" ], "score": [ 151, 52, 19, 9, 34, 6 ], "text": [ "Down some toddler's throat. Now we have stickers and website codes which are much more difficult to choke on and far less expensive...
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[ [], [], [], [], [], [] ]
6p57dz
why do we have to pasteurize cow milk but not breast milk?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6p57dz/eli5_why_do_we_have_to_pasteurize_cow_milk_but/
{ "a_id": [ "dkmr8jf", "dkmsc46" ], "score": [ 2, 7 ], "text": [ "The difference is that Brest milk isn't generally kept for long times where bacteria and pathogens can get in and start multiplying, Its almost always ingested teat to mouth. As opposed to cow or goat milk.", "Milk is st...
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[ [], [] ]
219h0l
why is "district attorney" in the us often an elected and political position?
In the US, the person who leads the government office responsible for prosecuting crimes is called the "District Attorney" or "DA", and in many areas, this person is elected (rather than appointed by merit) as part of the normal partisan election. It's heartbreaking how often you read things like "Well, it's an electi...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/219h0l/eli5_why_is_district_attorney_in_the_us_often_an/
{ "a_id": [ "cgavp5b" ], "score": [ 3 ], "text": [ "How do you suggest they get appointed, if not by election? Who decides what the test looks like? Who administers it for? Who decides what crimes will be focused on? Who decides what crimes won't be focused on?\n\nElecting a person seems like the ...
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[ [] ]
1pcv2y
Without ready access to sugar, what were popular desserts in early Colonial America?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/1pcv2y/without_ready_access_to_sugar_what_were_popular/
{ "a_id": [ "cd15oum", "cd15zqg", "cd16zsq", "cd180st", "cd18559", "cd1aga0", "cd1b701", "cd1bwtl" ], "score": [ 290, 10, 30, 29, 62, 3, 6, 8 ], "text": [ "Settlers in the area lacked traditional cane sugar, but they were not without sugar. T...
[]
[]
[ [], [], [], [ "http://www.foodtimeline.org/foodcolonial.html#colonialcookbooks" ], [ "http://www.hulu.com/watch/231568", "http://www.orsba.org/htdocs/download/Honey%20Bees%20Across%20America.html", "http://www.thehenryford.org/food/cookware.aspx?cookwareID=486" ], [], [], [] ]
8ko7ga
Are there any mammals with the same or similar vocal range/abilities as humans?
askscience
https://www.reddit.com/r/askscience/comments/8ko7ga/are_there_any_mammals_with_the_same_or_similar/
{ "a_id": [ "dz9cned", "dz9cuhy", "dz9e7a8", "dz9gh6i", "dz9rd24", "dz9svea", "dz9ujks", "dz9ypn5", "dz9znxv", "dzab69r", "dzmqpsm" ], "score": [ 4761, 154, 715, 588, 44, 36, 15, 89, 13, 2, 2 ], "text": [ "Dogs actuall...
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[]
[ [], [ "https://youtu.be/mSB71jNq-yQ?t=148" ], [ "https://m.youtube.com/watch?v=vPtcNucxiMg" ], [ "https://www.youtube.com/watch?v=VjE0Kdfos4Y" ], [ "https://youtu.be/PpccpglnNf0", "https://youtu.be/NfPndEB2ec0" ], [ "http://www.sciencemag.org/news/2016/12/why-monkeys-can-t-...
2q3avs
Does History only pertain to humans?
I hope this is the correct place to ask this: Does history only refer to the past of humans? I'm trying to answer a college essay prompt "What historical moment or event do you wish you could have witnessed?" However i'm unclear on the definition of history. The dictionary definitions are vague and sometimes refer to ...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/2q3avs/does_history_only_pertain_to_humans/
{ "a_id": [ "cn2erw2" ], "score": [ 9 ], "text": [ "If considered with its technical and narrow definition, \"history\" refers to that part of the past that is documented with written records. One can have a history of volcanic eruptions - and not even consider their effect on people - but the use...
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[ [] ]
8xfsq1
why did some animals in the same family become hyper aggressive like geese, whereas ducks are relatively benign?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8xfsq1/eli5_why_did_some_animals_in_the_same_family/
{ "a_id": [ "e235aal", "e23belt", "e23fe10", "e23k9xe", "e23kn2d", "e23prfv", "e23vvmo", "e240y2p" ], "score": [ 27, 2855, 58, 353, 49, 14, 11, 2 ], "text": [ "Geese have earned their vicious reputation from their behaviour when they protect ...
[]
[]
[ [], [ "https://www.ncbi.nlm.nih.gov/pubmed/9710456", "https://www.reddit.com/r/explainlikeimfive/comments/8xfsq1/comment/e23udwm?st=JJF6G7NZ&sh=6cf27b5c", "https://www.ncbi.nlm.nih.gov/pubmed/28556322", "https://doi.org/10.1093/icb/14.1.249" ], [], [], [], [], [], [ "https://...
vfgrx
How much explosive would be needed to destroy the moon, and if we used the debris to make rings à la Saturn, how would this affect the tides?
Based on [this comment](_URL_0_) and the [video](_URL_1_) therein. Apart from the effect on the tides, would the ring reform into the moon? How would our satellites be affected? How much darker/brighter would the night be?
askscience
http://www.reddit.com/r/askscience/comments/vfgrx/how_much_explosive_would_be_needed_to_destroy_the/
{ "a_id": [ "c5411zc" ], "score": [ 9 ], "text": [ "The gravitational binding energy of a spherical object is close to (3/5) GM^2 /R - that's the energy you need to completely overcome gravity and blow the object apart. Plugging in the numbers for the moon gives you about 10^29 J. That's the equiv...
[]
[ "http://www.reddit.com/r/askscience/comments/vej0l/could_you_see_saturns_rings_with_your_naked_eye/c53ty3e", "http://www.youtube.com/watch?v=hoz5Q2rGQtQ" ]
[ [] ]
5sgnao
how does math describe nature so well ?
I'm studying physics at the moment and am astonished at how beautifully interconnected all the equations are and how it all makes sense. How does math describe physics and all other sciences so well?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5sgnao/eli5_how_does_math_describe_nature_so_well/
{ "a_id": [ "ddew8dm", "ddewuye", "ddey6r2", "ddf22ax", "ddf6l1r", "ddg4md5" ], "score": [ 5, 2, 6, 12, 5, 3 ], "text": [ "Well, remember, we designed the math to describe nature. There are tons of theories in mathematical physics that didn't describe natur...
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[]
[ [], [], [], [], [ "https://www.dartmouth.edu/~matc/MathDrama/reading/Wigner.html" ], [] ]
2grhn6
"At near-light speed, we could travel to other star systems within a human lifetime, but when we arrived, everyone on earth would be long dead." At what speed does this scenario start to be a problem? How fast can we travel through space before years in the ship start to look like decades on earth?
askscience
http://www.reddit.com/r/askscience/comments/2grhn6/at_nearlight_speed_we_could_travel_to_other_star/
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[]
[]
[ [], [], [], [], [], [], [ "http://en.wikipedia.org/wiki/Time_dilation", "http://www.1728.org/reltivty.htm?b0=900000000" ], [], [], [], [], [ "https://docs.google.com/spreadsheets/d/1SvdZULxciBtcWhVyk9BPgSG0ZeodI8x_kzYLMolxVgc/edit?usp=sharing" ], [] ]
1dtt53
Whether a woman is fertilized after sex or not, where does the semen go?
askscience
http://www.reddit.com/r/askscience/comments/1dtt53/whether_a_woman_is_fertilized_after_sex_or_not/
{ "a_id": [ "c9ttjqf", "c9ty7b2", "c9tzyu0" ], "score": [ 12, 2, 3 ], "text": [ "Since sperm cells don't last very long at warm temperatures, the cell will undergo apoptosis (cell suicide.) ", "i would hesitate to say that all of it oozes out. some of it will stay there until t...
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[ [], [], [] ]
1qtioy
How could Lewis and Clark travel all the way out to Oregon when Louisiana Purchase only included as far as Montana?
How could they go as far as WA or OR when Louisiana Purchase didn't include those areas? Was it simply because no one control those areas and they just kept on going with interference? If that were the case, why didn't they start heading south and explore all the rest of North America, like Nevada or California? Thanks...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/1qtioy/how_could_lewis_and_clark_travel_all_the_way_out/
{ "a_id": [ "cdgcgft", "cdge700", "cdgibhr", "cdglw6j" ], "score": [ 25, 11, 8, 2 ], "text": [ "One of the greatest hopes of the period was that it would be possible to find a waterway that was navigable from the Atlantic (or at least from the Gulf of Mexico) to the Pacific...
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[ [ "http://www.nationalgeographic.com/lewisandclark/" ], [], [], [ "http://history.state.gov/milestones/1830-1860/oregon-territoryhttp://en.wikipedia.org/wiki/Oregon_Country" ] ]
3ixuy5
the situation in israël and palestina.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3ixuy5/eli5_the_situation_in_israël_and_palestina/
{ "a_id": [ "cukmv2g" ], "score": [ 2 ], "text": [ " Please remember to search before posting." ] }
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[ [] ]
17stih
how do residential solar panels 'give back' to the grid?
Is there a transducktor involved? I thought power only flowed in one direction and to push it in another direction (reverse) would kill you. How much power could you actually be contributing? Cost effective?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/17stih/eli5_how_do_residential_solar_panels_give_back_to/
{ "a_id": [ "c88j7y7" ], "score": [ 2 ], "text": [ " > How much power could you actually be contributing?\n\nDepends on a lot of factors: Where in the world is the house? Is it summer or winter (summers have more hours of sunshine)? Are there a lot of clouds?\n\nA very good soar panel has a power ...
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[ [] ]
17hsfq
How does H.265 compress video better than H.264?
Since I'm guessing it is an improvement of some piece of code or hardware, what exactly makes H.265 so much better than H.264?
askscience
http://www.reddit.com/r/askscience/comments/17hsfq/how_does_h265_compress_video_better_than_h264/
{ "a_id": [ "c85m8zh" ], "score": [ 13 ], "text": [ "The most simplistic explanation is that video encoding is always a trade-off between processing power versus file size. The more processing power you can throw at encoding/decoding, the smaller you can get the file size. As computers become m...
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[]
[ [ "http://en.wikipedia.org/wiki/High_Efficiency_Video_Coding" ] ]
us32u
Can a two dimensional object have mass?
Pardon my poor vernacular, but I am still in low level physics and I don't really know how to even pose the question I came across while watching Into the Wormhole. Anyway, does what dimension an object exists in have anything to do with its mass? ALSO, can objects of different dimensions beyond or below [X,Y,Z] scales...
askscience
http://www.reddit.com/r/askscience/comments/us32u/can_a_two_dimensional_object_have_mass/
{ "a_id": [ "c4y99p9", "c4ya23c" ], "score": [ 5, 5 ], "text": [ "Well, electrons and other elementary particles have no dimensions and have mass.\n\nBut yes, these are all in fact just mathematical constructs in attempt to describe what is happening.", "It depends on what you mean by ...
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[ [], [] ]
56zdy0
What is the simplest venom used by an organism?
askscience
https://www.reddit.com/r/askscience/comments/56zdy0/what_is_the_simplest_venom_used_by_an_organism/
{ "a_id": [ "d8o6716" ], "score": [ 6 ], "text": [ "Im going to answer based on the assumption that you specifically want formation about venom, and not generally poisons.\n\nOff hand most venoms I can think of are mixtures of agents. The primary agent is usually a short protein, more accurately d...
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[ [] ]
4gywkh
Was Hitler in any way, at any point, a Zionist?
[deleted]
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/4gywkh/was_hitler_in_any_way_at_any_point_a_zionist/
{ "a_id": [ "d2lxvy3" ], "score": [ 8 ], "text": [ "Hi. This question was answered [here](_URL_0_).\n\nThe answer is totally and unequivocally no. Being Zionist means supporting the creation of a Jewish state, and Hitler never supported it. The Nazis at one point signed an agreement that deported ...
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[ [ "https://np.reddit.com/r/AskHistorians/comments/420wni/why_didnt_the_nazis_just_deport_the_jews_back_to/cz6semh" ] ]