Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
Why yawning is contagious.	[ "I believe it involves something called mirror neurons. The connections in our brain are formed from cells called neurons, that will cause electrical signals to be sent to different areas, and to to other cells in the body. The way a mirror neuron works is weird but interesting. Essentially the same neurons involve...	[ "Ok, just reading this post made me clear my throat. I'm genuinely curious and hope a psychologist or scientist will answer this :)" ]
How do planes flying in tight formation (i.e. the Blue Angels) not get screwed up by the other planes' jet wash or other machine-made turbulence?	[ "Hundreds of hours of training and flying. I'm not a pilot so I can't go into details, but my time in the service I met a few." ]	[ "I know Air travel and contrail contribution to cloud clover definitely changes surface temperature in cities. In the 3 day stand down of (almost) all air traffic in the days following the 9/11 attacks, there were measurable decreases in surface temperature . I can only assume the effect would contribute in other m...
How come you save more gas going faster (highway mileage) than you do going slower (city miles)	[ "When you're driving in the city it's a lot of stop and go - on the highway you can get to and maintain speed for longer periods of time. When you come to a stop or are in stop and go traffic you have to keep bringing your car back up to speed from a dead stop, which takes more energy (and therefore fuel) than just...	[ "Our brains didn't evolve with cars in mind. They evolved with, like, being hunted by a jaguar (or whatever) in mind. So your brain doesn't know what to do with a car. It thinks hey, we're sitting, our body's not really doing anything physical, there's very little activity or stimulus... this seems like a good time...
Biologically speaking, what makes people tired during intense workouts?	[ "Energy is produced two primarily ways in the body - glycolysis and the Krebs Cycle. Glycolysis produces ATP which fuels your body, but it does this without using oxygen. It produces low amounts of ATP and causes the production of lactic acid. Lactic acid is acidic and this is one of the major causes of muscle pain...	[ "Look at it like a phone and charger. If you put a load of energy into the phone (more than it's rated for), it'll do serious damage almost immediately. If you use an underrated charger, it'll put only a little energy in, but the phone will use more than it's getting and eventually die. Heat is just a form of ener...
If an object of large mass would suddenly appear 1 light-second away from you, would you feel the gravity instantly or with a delay of one second?	[ "[The speed of gravitational waves in the general theory of relativity is equal to the speed of light in vacuum, c](_URL_0_)" ]	[ "If by \"jumped\" you mean \"stepped off\", you'd just stay there floating next to the elevator. If you mean \"jumped\" as in jump up, you'd be putting yourself in an orbit that had a perigee at geosynchronous altitude and apogee slightly higher, with a period of slightly longer than a day. So relative to the eleva...
Why does the way back always feel shorter than they way there?	[ "If you are going somewhere for the first time you are devoting a lot more processing power to following directions and looking out for signs/landmarks, etc. That makes time and distance seem greater. There is also the anticipation of some event/experience to keep you mind working hard; again creating a feeling of ...	[ "Context. The thought was formed in one environment and an association created. When you pass through a doorway you're passing into a new context and the association is lost." ]
Who are the Koch brothers and why is everyone making a big deal about them?	[ "They are two very wealthy very right-wing brothers who donate a lot of money towards political causes. Thus, people who are against the causes they support do not like them and feel that their money buys them an unfair amount of influence." ]	[ "This is a very common question. You can use search to find [all the other really good answers](_URL_0_ ). This is instant, and faster than ust typing in your question every time. It's a way of cheating elections. Read the others, and then ask a more specific question." ]
How did the alphabet get it's order?	[ "hi! not excluding anyone else from contributing more/new/better info on this, but FYI, there's are some relevant posts in this section of the FAQ* [Alphabetical Order(s)](_URL_0_) *see the link on the sidebar or the wiki tab" ]	[ "Thank you for your submission! Unfortunately, your submission has been removed for the following reason(s): You can find the basic answer with a google / wiki search. Please start there and come back with a more specific question. If you disagree with this decision, please send a [message to the moderators.](_URL...
Why does eating under cooked chicken make us sick, but eating under cooked beef is completely normal	[ "Beef has a higher density than chicken meat, and as such bacteria have a harder time penetrating the outer layers of the beef, compared to chicken meat. This means you just have to take care of the bacteria on the outside of the beef, and you can keep the inside red, if that's what you want. For the exact same rea...	[ "It comes from when England was invaded and conquered by the Normans from France in 1066. Being from France the Normans spoke French while the rest of the country being English spoke English. The English were mostly poor and did not eat a lot of meat though they did raise the animals. The Normans being the conquere...
As a ginger, my skin burns and will never tan. What exactly differentiates skin that will tan from skin that will burn?	[ "Red heads have a mutation in their MC1R (Melanocortin 1 receptor) that stops it functioning. Normally this receptor is involved in the UV response pathway that causes melanin producing cells to switch from red/lighter pheomelanin to darker eumelanin. As a result redheads cannot tan." ]	[ "Directly from Apple: > Apple Watch uses green LED lights paired with light‑sensitive photodiodes to detect the amount of blood flowing through your wrist at any given moment. When your heart beats, the blood flow in your wrist — and the green light absorption — is greater. Between beats, it’s less. By flashing it...
Why do news reporters insist on going "on location" for stories that really have no reason for them to be there?	[ "The one that gets me are the reporters down at the courthouse reporting live at 11pm getting the facts. Yeah, thanks, Sparky, the courthouse closed 6 hours ago. no need to be there in front of a dark marble court house where nothing will be happening again for another 10 hours." ]	[ "You can turn on your tap and get water instantly but if you're at a bar and want a beer, you need to wait for the bartender. TV is broadcast like radio. That means that the signal is always running and you just need to tell a TV to start paying attention to it. Modern digital cable TV system complicate some of the...
Can we use radar to detect asteroids?	[ "Radio waves are used to image asteroids. It is actually pretty interesting when you look at the techniques. Even Venus and Mercury have been radar imaged from Earth (using the Arecibo observatory): _URL_3_" ]	[ "It had no fighter escort, or really any defensive capabilities whatsoever (the plane had been stripped of all armor and everything defensive but a rear tail gun, because the bomb was so heavy and the distance so far). The entire \"defense\" of the planes was surprise and the inability to distinguish them from run-...
the difference between 8bit and 16bit	[ "A bit is a unit of information expressed as either a 0 or a 1. 8 bits is simply a string of 8 1s or 0s. While 16 bits is a string of 16 1s or 0s. If we have 1 bit of information, we can represent two things: 1 and 0 If we have 2 bits of information, we can represent four things: 00, 01, 10 and 11 If we have n bit...	[ "Take a picture, any picture. Now zoom in. Zoom in more. Keep going. Eventually you'll get to the point where you can see the individual pixels and the image stops looking good. That's exactly what's happening here. SNES games were designed for small screens with a small number of pixels. If you put that same game...
how prosthetic arms and hands work	[ "What prosethetic hand? Every one is different, and as far as I know, there are not any on the market that are anything near realistic. [These are the most common type of prosthetic that you see](_URL_1_). [On the high end, there are more realistic prosthetics that use cables or gas cyllinders with a switch or bu...	[ "How do you tell the difference between a \"mathematical apparatus that works\" and something that is \"really real\"?" ]
Why were the Dutch so successful in the early colonial period, and why didn't their power last?	[ "Previously asked questions: - [Why were the Dutch so successful in the early colonial period, and why didn't their power last?](_URL_0_) - [What did the British do 'right' with regard to colonisation that enabled them to grow to have the largest empire of all time rather than the French, Italians, Dutch or Japanes...	[ "It was a \"pump and dump\" scheme. Buy up a company that is doing terribly, talk it up like it is doing wonderfully along with faking your income reports, then sell off some shares while everyone thinks it is hot stuff. Then vanish with your gains before people discover it was all smoke and mirrors." ]
Is there a factual, un-ideological and un-biased primary source covering the history of all (or mostly all) communist governments?	[ "This isn't exactly the answer you are looking for, but unfortunately, I do not think such a text exists, nor could it exist. Communism is an inherently political subject, and there is no way to have an \"unbiased\" history of it. Moreover, even books like the Rise and Fall of the Third Reich have biases; it woul...	[ "[What Every Medievalist Should Know.](_URL_3_) The list is relatively up-to-date and should point you towards some of the most useful intro-level texts in each of these subject areas. If your project delves into the Renaissance, I'd also suggest this site. It's a bit more limited to a specific time/place, but it's...
Why can companies like Apple and Google bypass device passwords but hackers (for the most part) cannot?	[ "There are fail safes and recovery methods built into most security systems, regardless of what type of machine it is. Apple/Google uses them to get around the screen locks like you mentioned, and so can hackers that know what they are doing. No form of security is perfect, hackers eventually find and exploit the w...	[ "Brains easily perform many, many tasks hat are difficult for computer. Take that we know brains are optimized for pattern-finding. Consider intelligent life forms have to interact with a real 3-world and real time. Which means they can check their expectations. Testings a supposition is as simple as rotating an o...
Can a battery operated device function under vacuum chamber pressures?	[ "I don't think they test batteries past flight-worthiness for the most part. If it's an issue, why not run a wire into the chamber, or introduce the vibrations from outside the chamber (through a shaft or just vibrating the chamber)? Also, if you detonate anything make sure to post it here. You know... for science....	[ "Energy consumption, pure and simple. RO membranes, hydrolysis, evaporation, etc., all take energy. A lot of it." ]
Why aren't there more eye colors and what makes common eye colors common?	[ "Cause the other answers don't seem very ELI5 I'll give it a go. Eye colour is determined by amount of melanin in the iris (coloured part of the eye). Melanin is the only pigment the human body has, albinos have none hence the paper white skin and blue/red eyes. Populations like Sudan have very high levels hence ve...	[ "It is down to the combination of the genes you get half the genes from your mother and half from your father but those genes are an almost random selection of those genes which go to make up each so can be combined in trillions of different ways. Like saying you get half a pack of cards from one parent and half fr...
Why don't fast food restaurants serve breakfast all the time?	[ "While some large chains do serve breakfast all day, many don't, and it's largely about setup and speed. Fast food is all about speed, and by limiting the number of items that the workers have to grab, you speed up the whole process. So, there is often one setup for breakfast, and clear it out and have another for ...	[ "This is from 2008: _URL_0_ Better deal to buy nationwide advertising instead of of a regional area, and it can build hype up. I know where I grew up, they built a Sonic and it was popular at first, no it's not the south either." ]
Friday Free-for-All \| November 30, 2018	[ "I just submitted a new journal article, and I learned that I have an academic job interview next week*! Yay, but also ahhhh why am I posting here instead of writing my presentation... (the two are, to the best of my knowledge, unrelated, but who knows maybe it's karma)" ]	[ "What exactly is not clear about the quote? Why Conference is dated by July and not by August - if so, Potsdam Conference was held from July 17, to August, 2. Bulk of debates happened in July. Source 1. [Potsdam Agreement](_URL_0_)" ]
When was music theory first discovered?	[ "Theories aren't discovered, they are invented. But for the West I'd go with Pythagoras (c. 570 – c. 495 BC), who discovered that the pitch of a musical note is related to the length of the string that produced it and that harmonic intervals form simple numerical ratios. He used this as a foundation for a theory of...	[ "This won't exactly give you the spelled-out relationship of two fruits, but nonetheless: Check out [TimeTree](_URL_3_). It takes any two organisms and estimates how long ago their phylogenetic lineage split - i.e. when they had their last common ancestor. For example: * [Strawberries and Durian evolved in differen...
What are the chemical changes which occur in Lithium ion batteries after prolonged usage which renders them unusable?	[ "In general batteries are 2 different types of metals soaked in acid. The exact composition of the metals and acid determine the types of battery. In a perfectly rechargable battery, the chemical reaction that occurs when the battery is in use is reversed when the battery charges. This is never the case. Each recha...	[ "Briefly, because the [pair potential](_URL_0_) between bonded atoms is asymmetric. When atoms are bonded, they sit at a certain equilibrium distance where electrostatic attraction balances repulsion from the Exclusion Principle. The balance can be thought of as a potential energy well with an approximately parabo...
How did the first bilingual person learn a different language?	[ "It's possible to learn a language by completely immersing yourself in it. When you think about it, that's sort of what a newborn has to do to learn his or her first language. If you move to a country with a different language, you will eventually figure it out without formal education." ]	[ "Most have a [relay phone](_URL_0_) in their homes - they use an interpreter. [TTY](_URL_1_) is also available on mobile phones, landlines, and in 911 centers." ]
Creating a "Shield-Ramp" against Heavy-Cavalry to close them in a Spear Wall... Any Historic Source?	[ "In the battle of Gaugamela, if I recall the name right, Alexandet the Great did something similar... Albeit Against chariots. He was immensely outnumbered and many diverse tactics and ruses to win the day, one of which was to give a lot of space on his left most flank to bait out a full charge from the chariots o...	[ "Hi - we as mods have approved this thread, because while this is a homework question, it is asking for clarification or resources, rather than the answer itself, which is fine according to [our rules](_URL_1_). This policy is further explained in this [Rules Roundtable thread](_URL_3_) and this [META Thread](_URL_...
How does blitzkrieg attack work? What makes it special and recognizable to this day?	[ "It literally means \"lightning war\". Basically, the Germans threw a ton of forces in one direction extremely fast when the enemy wasn't expecting it and didn't have time to respond. This type of war strategy is effective if done right because it lets your forces secure key positions/territory that they need, over...	[ "_URL_0_ The wikipedia article is excellent and better than any of the answers in here so far. If you have specific parts you don't understand, ask away and I can help explain them to you." ]
Why we cannot tangibly test for mental illness.	[ "The problem is that the brain is an incredibly complex organ and we are using very blunt tools to try and understand how it works. We don't have tools capable of seeing \"thoughts\" so it logically follows that we have no tools capable of seeing mental illness. There is some interesting work going on with FMRIs wh...	[ "Right now it the closest we have gotten is using artificial neural networks. _URL_0_ It isn't quite as complex as mapping all of the synapses in the human brain. Basically we can make a neural network, and by feeding it a set of inputs and the correct output, we can teach it what kind of output we want in the futu...
Why do we call countries by names different than what they call themselves?	[ "Here's a good article explaining this question. _URL_0_" ]	[ "Inflation. Let's put it this way, in America it used to be that you could buy a steak dinner for let's say $5. Then today that same steak dinner would cost $50. How much we pay for things, and how much we get paid has increased slowly over time. In other countries, it has increased way faster, so something that us...
How can the 1 ton Curiosity rover move if it generates only 120 watts of power (~2 lightbulbs)?	[ "I'll throw this in just to put some things into perspective... You don't need a lot of power to move something heavy if you move it slow enough using gear reduction. You could lift an elephant by yourself if you had an apparatus that was strong enough and gave you enough mechanical advantage. You would just lift i...	[ "You kind of got it right but the Command Module never went to the moon, that was the job of the [Lunar Module](_URL_0_). So the Command Module waited in orbit while the Lunar Module went down. And the Lunar Module had it's own fuel and rockets (according to wikipedia 18000 lbs/8200 kg for landing on the moon and 5...
After Christianity became the state religion of the Roman Empire, how did they rectify the fact that Roman officials killed Jesus?	[ "They assigned more and more blame to Jews. Notice that by the time the Gospel of John is written that Pontius Pilate is a sympathetic figure who believes Jesus is innocent but forced to acquiesce to the demands of a Jewish mob, which is a portrait that doesn't mesh with the historical picture of Pilate at all." ]	[ "Before RICO laws it was hard to take down an entire organization because the mob boss could never be connected to any specific crime. The Mob boss would talk to his under-boss about an illicit act. The under-boss would pass the info along to a caporegime (a sort of lieutenant) who would then instruct one of his ga...
Why are fractals found in nature?	[ "Fractals can be created with a couple of rules and lots of repetition. It'd be more surprising if fractals didn't occur in nature." ]	[ "This had just popped up on the front page a few days ago, take a look at the explanation by [Sean Carroll](_URL_0_). He answers the question very basically there, though if you watch the entire lecture he goes into further detail." ]
Why does the conversion from energy to mass "need" the speed of light in the equation? I don't have trouble conceptualizing the necessity for some huge constant, but how the heck does light speed coincidentally fit the bill?	[ "You seem to be hung up over why a constant of light waves appears in the energy equation of particles. But the thing is there is nothing special about lights speed itself. Rather, Einsteins theory special relativity, says that there is some constant 'speed limit' in which only massless particles can travel at (an...	[ "Just in case this helps to make something click, try it with the c included. E^2 -p^(2)c^2 = m^(2)c^4 with p=0, we have E^2 = m^(2)c^(4) yielding E=mc^2 which you may find familiar." ]
What can Turkey gain from shooting down the Russian fighter ?	[ "Well, I imagine the main thing that they will gain is not having Russian warplanes fly over their airspace without permission. It's a matter of sovereignty and pride, and legitimacy among your people. Think about it this way: if foreign warplanes were flying over your house without the permission of your governmen...	[ "I have a hard time answering this question myself. There seems to be a naive mentality that if we remove these tyrants, a liberal democracy will spring up to replace them. You'd think we would have learned our lesson by now. Assad is a real motherfucker, but he's got a pretty strong incentive to crush violent Isla...
What exactly are birth marks and what causes them to appear?	[ "_URL_0_ first line: > \"A birthmark is a benign irregularity on the skin which is present at birth or appears shortly after birth, usually in the first month. They can occur anywhere on the skin.[1] Birthmarks are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocy...	[ "You mean like the ones you only notice when you're watching someone sleep really closely for hours on end? Don't know." ]
How much did drinks at a saloon cost in the Old West?	[ "With trepidation, I will try my first posting of an image - one suitable for this question. This is [John Piper's Old Corner Bar](_URL_0_) in Virginia City, Nevada in late 1860, illustrated by Grafton Brown, an African American Artist who produced a Bird's Eye View of the town (with businesses illustrated around p...	[ "Hello! This has been covered before on this sub.[ Here](_URL_0_) is the relevant section from the FAQ. [This post](_URL_1_) in particular from /u/idjet covers the topic quite well. To sum it up, the idea that clean water wasn't available in the Middle Ages and that people used beer or ale as a\"substitute\" for wa...
how do biore strips work? why are they only shaped for noses?	[ "Biore strips act like tape, sticking to the sebum (oil) on your skin. The strips actually take out things called sebaceous filaments, which are part of your skin and are supposed to be there. So you probably shouldn't use them." ]	[ "Bacteria on/in your skin metabolize the minerals in your sweat and create a by-product. TL;DR: sweat is bacteria farts." ]
why do the girls processing drugs always wear nothing but bra and panties?	[ "Fanservice. In small scale production it's also to keep the girls from pocketing some of the drugs. In large production realistically they will all wear lab coat and mask both to protect themselves from the drug and retain the quality of the drug from dead skin, hair, and sweat." ]	[ "A pill or tablet takes a while to dissolve in your stomach and enter your bloodstream. If you crush it into powder it enters your bloodstream much faster." ]
How did Google Chrome become so popular?	[ "* First Google became a very very popular search engine. * Google started promoting Chrome on their browser page. * Google also released Gmail which became very popular. * This built up brand trust which made it easier for people to try out Chrome * Once they tried it, many people found they had a much better expe...	[ "This is one of the most asked questions in this subreddit. Please search your question before posting. _URL_0_" ]
Given that governments and banks are fundamentally opposed to Bitcoin, what is to stop them simply buying them all up over time and hogging them to prevent their use and circulation?	[ "While it is true that the number of bitcoins is effectively capped, that does not stop bitcoins as bitcoins are infinitely divisible. Even if certain entities were to take bitcoins out of the supply permanently, bitcoins could be divided further and further. These entities would get richer and richer in bitcoins t...	[ "We have what's known as a hung parliament. This means that no one party has enough seats in Parliament to form a government. One party needs 326 of their MP's to have the majority and form the government. When no one party has enough MP's to form a government in their own right they can team up with other parties...
Friday Free-for-All \| Sept. 21, 2012	[ "utterly random but I'm a bit bored; The Phoenicians predicted the Greek navy crushing the Persian invasion fleet after the battle of Thermopylae. Several captains tried to explain this to Xerxes but he simply had them killed once he found out they wouldn't set sail for him. This led to the Phoenicians completely w...	[ "The internet predates websites. Back in the day, there were several types of non-web internet sites you could go to, and they often used different prefices: * ftp - upload and download files * telnet - miscellaneous text based interface * gopher - text based hyperlinked site So if it was 1993, and you were at Stat...
So far scientists have been unable to unify quantum mechanics with general relativity. Is there a reason we assume that this is possible to begin with?	[ "I don't know enough about the Grand Unification Epoch to say how likely it is, but as is quantum mechanics and general relativity are very different. They have to be unified somehow, since we know that whatever theory is actually true looks like quantum mechanics on a small scale and general relativity on a large ...	[ "Because in theory it allows you to compute both values at the same time. So, lets say I'm trying to hack an encryption. The encryption uses 10 bit key. So in order to break it, I have to try every possible input for that key, and decrypt with each one: 0000000000 0000000001 0000000010 0000000011 ... 111111111...
At what elevation is time officially calculated at?	[ "Let's take UTC instead, since GMT is no longer maintained as a scientific time standard. UTC is based on TAI (International Atomic Time) with added leap seconds to account for the irregularity of the movement of the Earth, and TAI accounts for the passage of time on Earth's [geoid](_URL_0_). Since the geoid is an ...	[ "Nøt sure how old it is but in my country, norway, we oftes say \"with/against the sun\". (With the sun being the same as with the clock). Quite independent of any mechanical apparatus." ]
Why do grownups throw up less than children?	[ "Children are dirty. They don't wash their hands, they're constantly around a bunch of other children that don't wash their hands, they put things in their mouths and generally do everything you're not supposed to do if you want to avoid sickness. They also have developing immune systems that haven't developed anti...	[ "commercialism. if you were happy with your old stuff, you wouldn't need to buy new stuff. all the designers and manufacturers come out with new looking stuff and market the old stuff as ugly and new stuff as pretty in order to make money. our tastes are hugely influenced by others." ]
Why do people pay millions of dollars for Stradivari violins when tests have shown that the sound they produce are just as equal or of lower quality than modern violins? Is it because of their rarity?	[ "Is a flaw that becomes accepted as the industry standard still a flaw? Reminds me of \"that's not a bug, it's a feature\" in programming, but essentially when a flaw becomes accepted, it becomes part of the character of the sound. Suddenly flawless sound is missing something and sounds too vanilla. It is also what...	[ "Men didn't prefer virgins because they got to be the first. It was about legacy. Everything they had and were would be passed on to a son, and they wanted to make sure that boy really was his son. Marrying a virgin helped ensure this. Not only could the husband be sure she was not pregnant with another man's chil...
In Dexter, he pokes people in the neck with a syringe full of some agent and they fall unconscious almost instantly. How accurate is this; how quickly would the serum actually reach the brain and have its effect?	[ "Neuroscientist Here. I use Methohexital on rare occasion to knock out rats through their indwelling jugular catheters. It is an incredibly fast acting and short lived barbiturate. I believe it would be more effective than etorphine and knocking people out instantly. I found a source that sites onest in under [60 ...	[ "From [visual tim]( _URL_0_) I don't see why hummingbirds wouldn't operate faster. The hummingbird's metabolism is what fuels their high speed, and their nutrient rich diet supports it. If their nervous system can perform at such high speeds, it stands to reason their brain could. I wasn't going to mention this wit...
How do machinery such as diggers transfer power to the tracks or wheels when the top half spins?	[ "Caterpillar trained mechanic here. Modern era excavators do have hydraulically powered tracks, along with all the other moving parts. The engine is only there to provide power to the hydraulic pumps. There is a component called a rotary manifold that allows the hydraulic fluid to flow through multiple separate gal...	[ "In Digg users can \"friend\" other users, which is a bit like following someone on Twitter. You then get friends' submissions in a separate list. Power users are just regular users who have a lot of followers who often digg their submissions. This means the user gets a head start and are more likely to have their ...
Why is it difficult to pull socks onto wet/damp feet?	[ "I would assume that fibres in the cloth would absorb water, this would normally not be an issue however socks and other pieces of cloth have multiple layers. This then becomes a problem as the threads would then absorb the liquid( from the bottom layer up). This would make the fabric significantly less elastic in ...	[ "From personal experience, the mind becomes attached to great moments in life and finds something to bring that memory back, like hair or feet. Same thing with great trauma unfortunately. Seen a movie about a girl been gang raped and when she got older that was how she got off, by recreating the same circumstances....
How do crime families make so much money and manage not to get caught despite their notoriety?	[ "Because most of the time they don't start out as crime families. They are communities banding together to look out for one another when the law fails to do so. It usually falls on local police forces to stop crimes, but when the police force lives locally they are part of the community being protected. The familie...	[ "Not a huge amount, really. We already pretty much know what's in these products (I mean, with Coke, you can basically just read the label). The difficulty is only getting the exact formulation and mixing right. For most people, the prohibitive part of that is not knowing how it's done - it's having access to the k...
Why does the electricity in some cars get cut off when starting the engine?	[ "The starter motor draws a lot of current, enough current to reduce the voltage output from the battery. Since electronics sometimes do wonky things when operated at lower than necessary voltage, it's better to just disconnect them for a couple of seconds while the car starts." ]	[ "Nervous system is all about the action potential in the neurons. All neurons signalling is an active chemical function. Energy is required to produce this function, and as a result lower temperatures drive down the energy available for the reaction to occur. This also happens in cells, making it impossible to main...
How can conversations be so real, interesting and fascinating in dreams if it's really just our own brain talking to itself?	[ "Well, your brain knows what's interesting and fascinating to you so it's easy for it to interest and fascinate you in your dreams." ]	[ "An object in motion tends to stay in motion while an object at rest tends to stay at rest. Simply put, when going to sleep your mind is still active since it has been active all day while when you wake up your mind and body have been comatose for an extended period of time which makes it harder to get moving again...
Why does it seem like the whole world knows whenever someone makes a nuclear bomb?	[ "Because making an atomic bomb takes a LOT of infrastructure OR international specialty purchases. Also, EVERYONE is watching real, real, hard." ]	[ "Media companies \"Nuking\" torrent files with data. Nuking basically means they put some kind of trojan horse in a movie/video game file, so when you download it, they can track it and report you to your ISP." ]
If Blackjack is a game of 'skill', how is it not allowed in states that don't have gambling?	[ "Blackjack/Poker can be a game of skill AND gambling. Gambling is just the wagering of money on an event with an uncertain outcome. Think of it as still being a game of chance (like roulette, craps, etc.) with a meta-game of skillfulness and card counting." ]	[ "A lot of the tough on tobacco laws come from the fact that the tobacco industry got in a lot of trouble... and I mean a lot of trouble, especially in the 90s. Like murdering babies trouble. Mostly for lying to the public and under oath to congress about the affects of their product. A lot of these laws came fr...
What was it that allowed the Spanish empire to become more successful than the Portugese?	[ "Why do you think the Spanish Empire was more successful than the Portuguese Empire? Both were tremendously profitable and both left an incredible cultural legacy. Portugal lost much of its eastern empire centuries before Spain lost its empire, but it held unto Brasil which produced much gold and agricultural wealt...	[ "Linguistics is plagued by errors in translations. As a native Brazilian Portuguese speaker, I have all my life the notion that \"saudades\" is an difficult term to translate. But the \"I miss it\" seems to carry the idea pretty well. And the pair of concepts darkness/lightness don't have any correlated pair so obv...
How did we find out how different animals see the world? (And how accurate is this wisdom?)	[ "They dissect the eyes and study the structure and types of receptors that they have. If the receptors react to ultraviolet light then the animal can see in that range of the light spectrum." ]	[ "How do you know a year has passed without looking at a calendar? I imagine they sense the temperature/climate changes like anything else." ]
How does a Cold or Flu Virus cause our joints and muscles to ache?	[ "When the body's immune system recognizes the foreign viral invader, the [immune complexes that form](_URL_1_) can essentially land in the joints, causing a mild form of arthritis. [Inflammation in the joints](_URL_0_) isn't unexpected during immune response." ]	[ "If we were a solid object we wouldn't be doing work, but the human body is made to be able to move. We could have been made like robots who could \"lock into position\" and so not do work when holding stationary, but the evolutionary solutions is muscles that contract, so that even if we are not moving on a large ...
How is that Earth has an atmosphere? What is fighting with the vacuum? Why is some gas able to create pressure out of nothing?	[ "In a word, Gravity The Earth's gravity pulls on the atmosphere the same way that it keeps the oceans glued to the earth. At some point during the Earth's formation much of the Earth was liquid due to it's high temperature so the lighter gaseous elements like Hydrogen, Helium, Carbon Dioxide, and Nitrogen bubbled t...	[ "Space isn't expanding like a balloon into the air around it - it's expanding like the surface of the balloon. The surface of a balloon expands without needing more \"balloon\" to expand into - we call this stretching. Space expands in a similar way, only in more dimensions than the two of a balloon's surface." ]
Why Does Canadian Internet Have a Data Cap?	[ "The companies have no competition so they can price gouge as they please." ]	[ "Imagine a water pipe. If you're the only person using it you get full pressure. The more connections to that pipe the weaker the pressure." ]
Why is the Northeast and West Coast U.S. generally more liberal than the Midwest and South?	[ "People who live in big cities are more liberal and people who live in the country are more conservative. That's because the cities are where the big schools are and where new ideas usually happen, and the country areas are more traditional. The northeast has a lot of built-up cities and the west coast has several ...	[ "It's the time we live in. War and poverty in the location where that specific demographic is located. If you look back in time, to the middle/dark age, the roles were reversed. Militant extremist christians doing much of what extremists are doing today, but in Europe. The middle east at that time experienced a tim...
When I see a bright light bulb for just a moment and turn away, why do I see a spot of darkness in my vision?	[ "At the back of your eyes are little tiny receivers that tell your brain when they're getting hit by light. When you're looking at the bright light bulb, those receivers have to shout really, really loud to your brain, because they're receiving a lot of light. Just like anybody who shouts really, really loud, after...	[ "UPDATE! A colleague with superior google skills figured it out. It's caused by many nocturnal species of birds that tend to migrate southward behind cold fronts. Their nocturnal migration appears around radar locations as a circular formation with radars that are behind a cold front showing larger, darker formatio...
Jewish History Book Recommendations	[ "One way to come across a lot of really good books is to look at the current and past winners of the National Jewish Book Award (there are a bunch of categories within that): _URL_0_" ]	[ "Are there any good books on the structural evolution of the baroque to the early romantic guitar out there? Or at least a book comparing the two?" ]
How do we know Uranus's atmosphere is made of ammonia?	[ "The simple answer is the different molecules will produce different absorption lines after light reflects off of the planet. Since we can easily check the absorption lines of different substances on earth we can easily determine what is present in nearby planets and stars and such." ]	[ "Exposure to unfiltered sunlight and near-vacuum conditions, most likely. Conducting experiments on site would definitely pose a challenge though." ]
If microwaves and wifi routers operate at the same frequency (2.4 GHz), why doesn't a wifi router warm up objects around it?	[ "It's a question of wattage. Wifi operates on the order of 1 watt, whereas your microwave operates on the order of 1 kilowatt. So in a sense your router does heat the objects around it, just three orders of magnitude more slowly, which is plenty slow enough for the surrounding air to cool whatever it is back down."...	[ "Science. The food manufacturer doesnt know how long it takes for your oven to heat up. But they do know that when its 400° its at 400°. They know how long it needs to cook for at specific temperatures. So they are trying to eliminate as many variables as they can so you can replicate their results and get properly...
Why does hot water sound different when it's poured?	[ "The viscosity of water changes significantly with temperature (hot water \"flows easier\" than cold water). Viscosity and speed of sound are related, and the propagation speed of sound waves is an important factor in the sound it makes when poured." ]	[ "Air cavitates behind bullets is my understanding. You can hear them pass (the hiss) but in order to hear the cavitation (the snap, quite literally the air behind the bullet \"slamming shut\") you need to be quite close. Hence the saying." ]
Why are the lungs so sensitive to water?	[ "ELI5: Within the lungs, the surfaces where our breath meets the blood stream have to be at a near-perfect moisture balance in order for the oxygen and other gases/chemicals to be exchanged from air to blood efficiently. When they get too wet, they lose efficiency and cannot take in as much air, and when they get ...	[ "Capsaicin in chili peppers binds to spots on the tongue that make the brain think the mouth is literally on fire, and the best way the body has to flush it out is a runny nose and watery eyes. Also, this gets asked fairly often. Better to search first." ]
When the U.S. was expanding (including invading Mexican territory) why didn't they expand into the Caribbean islands?	[ "I won't touch on Cuba since I don't know a whole a lot of that particular island. But the US did expand into some Caribbean islands (Puerto Rico which was taken from Spain, and the Virgin Islands which were purchased from Denmark in 1917, Navassa island) but the vast majority of the Caribbean was owned by the Neth...	[ "A couple reasons. In the United States, the burden of proof is on the prosecutor to show that the defendant committed the crime. This \"presumption of innocence\" makes preparing a case hard work, because to win, the prosecutor has to convince 12 regular people that, with absolutely no doubt, the defendant commit...
Weather in the continental US moves from west to east. What makes hurricanes do the opposite and move from east to west in the Atlantic?	[ "ITs because of the prevailing winds. In the tropical zones the prevailing winds travel east to west whereas in the subtropical zones thy travel west to est. As the storms move north the influence of these winds changes their trajectory. This is a function of the [Hadley](_URL_0_) cells that dominate global weather...	[ "So basically it runs through a list of ranked elements. You usually want the higher ranks first in the list, so if it sees an element ranked lower then the next one down, it swaps them. It goes through the list in one direction, then once it reaches the end it goes back through the list in the other direction. It ...
Where did the initial momentum to spin the accretion disc that created our sun come from?	[ "> Where did that cloud initially get that momentum Different parts of that cloud were moving at different speeds in relation to each other. Basically the odds of initial cloud being so perfectly balanced to have 0 angular momentum would be very low. > is there somethign preventing that momentum from running out T...	[ "We do not know. We cannot even say with complete confidence that it has a start, although the leading theories of the day suggest it. Current science is not capable of getting all the way back to \"time zero,\" nor whatever occurred before that, if such a concept is even meaningful." ]
If you look through a microscope at the end of a thin optic fiber would you see an image of what is at the other end of said fiber?	[ "No. You would only see a spot of light from the other end (if there is a light source there). You need an array of fibers to carry an image. [Here is a picture](_URL_0_) of what an array of fibers will do." ]	[ "In a vacuum, no. The propagation speed of electromagnetic fields is the speed of light. As the magnet moves faster, time dilation causes the waves to always move away from it at the speed of light from its frame of reference. It can never \"catch up,\" just like any other physical object with mass. However, ther...
Did Muslim immigrants in America in the pre civil-war era experience any prejudice?	[ "This question is based on the premise that there were Muslim immigrants, other than Muslim slaves from Africa, in the Americas. I doubt this is the case, is there any evidence that there was a free Muslim population in pre-civil war America?" ]	[ "Very poorly. Assuming you ask about the time period after we found out they were possible, before that they obviously weren't a thing, but before we found out why people died left right and centre. However, we soon found out that some combination of blood clotted, others worked fine." ]
How come the dissolved potassium in for example a potassium hydroxide solution doesn't react with the water?	[ "The potassium in potassium hydroxide isnt metallic potassium. When you react with potassium metal with water it gives up electrons to water form hydrogen gas, hydroxide anions and potassium cations. Once the hydrogen gas leaves (often quite violently) you're left with a potassium hydroxide solution. Now to answer ...	[ "Think about things bouncing around. Imagine a box with a fan in it. Put 20 balls in ithe box. Now imagine a basket to one side just the right size for the balls. Turn on the fan. The balls jump around randomly. At some point a ball will fall into the basket. This will happen at a given rate which will depends on h...
Why does everyone make me say cheese before taking my picture?	[ "Saying a long E sound out loud causes your mouth to form a smile. You could also say \"bees!\" or \"sneeze!\"" ]	[ "To confirm that you're ready. What if the game just started and something came along and killed your guy?" ]
What's the difference between putting someone as Cc in an email versus just putting him/her as one of the recipients?	[ "When you add someone in the CC field, it's a way of saying \"you are not the primary recipient of this e-mail, but you should know about it\". Either way you get the exact same e-mail." ]	[ "Sometimes you don't want it to work faster but you want it to have a controlled release over a period of time. Take OxyContin for example. It has a special coating that slows the rate that your gut juices break it down making the medicine absorb slowly. Addicts will crush and snort it to get the full potency imme...
Did Medieval Peoples have Large Scale Mollusk/Snail Farms, or Were They Harvested From the Wild?	[ "[\"All around the Mediterranean there are wide stretches of beaches composed of crushed murex shells, silent witnesses to the geographical scope and longevity of the Phoenician dyeing industry\".](_URL_0_) It was all from a gigantic murex snail farm off the coast of modern day Lebanon, which was notably monopolize...	[ "If you have an approximate location, and you can approximate the type of rock, you can look at a geologic map of the area and come up with a fairly good idea of what it is and how old it is. If you have a piece of sandstone, a microscope, and a good idea of microbiology, you can look at the micro fossil assemblage...
Would it kill/hurt me if I only ate cereal for the rest of my life? If so, how and why?	[ "Even if the cereal is nutritious, eating only one thing indefinitely tends to make you deficient in something or other. It might take years for a problem to develop, but you're unlikely to stay healthy in the long term if you only eat one food." ]	[ "First, a large portion of store brands are made by the same companies that make the name brand items. Second, the only way kellogs could sue over frosties is if they were to emulate trademarked elements of the packaging (ie character, font etc) in a way that creates a substantial similarity which could reasonably...
How can opening up a massive firework store just for the fourth be a good investment?	[ "Fireworks aren't very expensive to make. They are sold for a lot more than they are worth which means a large profit margin. The free ones just influence people to buy more fireworks. I worked at a very large firework tent for two years. The family who ran it ended with a profit near $250,000. The stand was right ...	[ "Well the companies downsize their servers; potentially down to one actual server. The cost to keep that one server running is probably a lot less than a few hundred subscriptions / micro transactions a month. There's no point in taking it down if the company continues to exist, because you're making money off it b...
Why did a gentleman toss a catfish on the ice during the recent NHL playoff game?	[ "The Legend of the Octopus is a sports tradition during Detroit Red Wings home playoff games involving dead octopuses thrown onto the ice rink. The origins of the activity go back to the 1952 playoffs, when a National Hockey League team played two best-of-seven series to capture the Stanley Cup. The Nashville Pred...	[ "One thing to add: Schrödinger conceived this experiment to show how nonsensical and counterintuitive a certain interpretation of quantum mechanics is. In other words, we are not supposed to be able to understand how the cat can be simultaneously alive and dead." ]
With the current way the earth orbits the sun, are the hottest seasons for the equator spring and fall?	[ "_URL_0_ > Near the Equator there is little distinction between summer, winter, autumn, or spring. The temperatures are usually high year-round—with the exception of high mountains in South America and in Africa. (See Andes and Mount Kilimanjaro.) The temperature at the Equator can plummet during rainstorms. In ma...	[ "The problem is that the waste heat will always outweigh the temperature decrease from the ice. Its the same reason a refrigerator with the door open won't cool your apartment. The net effect would be to convert solar energy to heat. A more viable way to redirect solar energy is to put reflective particles such as ...
How do anti-theft wheels on shopping carts work?	[ "Kind of like invisible fences for dogs. There's a cable buried around the perimeter of the store. Each cart has a device that, when it goes outside of the cable perimeter, locks up one of the wheels and prevents it from spinning. I assume the logic behind this is that no one wants to steal a cart with a stuck whee...	[ "Well, back in the day, you didn't really have pay per view. You either paid for the channel (including less racy channels like HBO) or you didn't. If you paid for the channel, a technician came out to your cable box and installed a descrambler, which decrypted the signal and allowed your channel. The signals were...
How does the process of hibernation work? As in how does the animal not starve over that long period of time?	[ "If you watch squirrels around late autumn, you'll see that they get pretty fat. The animals will eat tons of food (A lot of it has been food they've stored up) before the hibernation season. These animals then experience a rapid slow down in their metabolism to help them to be able to live off of their fat deposit...	[ "How do you know a year has passed without looking at a calendar? I imagine they sense the temperature/climate changes like anything else." ]
What is negative mass/energy?	[ "> As far as I can tell, neither have been observed at all anywhere in the universe, so what are their relevance? The relevance is that if you plug those figures into some real models of the universe, it allows crazy things like exceeding the speed of light or time travel. It is significant because the media likes ...	[ "We do use antimatter currently for practical uses, ever heard of a PET scan? It would be the ultimate energy storage medium because gathering meaningful amounts of antimatter from nature is impractical. The best place to find it now is in the van Allen radiation belts." ]
How does putting a phone into a ceramic bowl amplify sound?	[ "Sound waves spread out in all directions and bounce off of solid surfaces. So if you put your phone in a bowl, the sound bounces off all of the interior surfaces of the bowl and exits out the open side. The bowl basically works kind of like a lens for sound waves." ]	[ "Not noticeably, no. Bring a hot cup of coffee into the car instead, it will work much better than Metallica." ]
I just saw an interesting TIL about the US hiring professional skeet shooters during WW1 to shoot thrown grenades in the air during trench warfare. How true is this? Was this even effective?	[ "Do you have the TIL link for sourcing? We'll know a lot more about the veracity of the claim that way." ]	[ "There are are variety of different cooking methods we know of from prehistory. Spitted meat seems broadly common, in British Isles and Scandinavia there's evidence of heated stones and water pits being used to cook as well as spitted meat (Keating 1908:326), in Polynesia and other places there's evidence of essent...
Why do they use sterile needles for lethal injection?	[ "Becausethey dont sell un-sterile needles at the store and re-using needles is both unnecessary and deliberitely cruel/insulting." ]	[ "In general, life sentences did exist in the early 20th century. For instance, the 1909 edition of [Kentucky Statutes](_URL_0_), sec. 3627, gives the punishment for murder as: > [D]eath or confinement in the penitentiary for life, in the discretion of the jury. When I have access to sources, I will try to look i...
Based on history, roughly how much of science as we know it is wrong, and will need to be corrected in the future?	[ "Don't forget - science does not prove something to be correct. It lends support to one hypothesis or another. When repeated testing, or multiple hypothesis point to a unifying set of concepts and ideas we coin this a \"theory\" - theory of gravity, theory of evolution are backed by millions of experiments and test...	[ "> how it really amounts to a bunch of bologna I don't have an answer, but I do need to point out that bologna = lunch meat. Baloney = nonsense." ]
Is the sun a black body?	[ "The plasma that makes up the \"surface\" of the Sun is in pretty good thermal equilibrium, so the sun's spectrum is pretty close to that of a blackbody. (I say \"pretty good\" because sunspots, for example, cause variations in temperature across the surface.) There is a bigger complication, though: at different ...	[ "Extrasolar planets are small and dim and really far away and their light is swamped by the light from their nearby stars. Existing telescopes for the most part don't even have the ability to distinguish the light from a planet direcdtly as a dot, much less map the planet. There is a proposal to devise a system to ...
How Roger Goodell still has a job if it seems most members of the NFLPA and most people on NFL teams seem to think that he is incompetent.	[ "Roger Goodell doesn't work for the NFLPA or the \"people on NFL teams\", he works for the owners of the teams. The owners (and Goodell) care about the business aspects, and under Goodell's watch the NFL's revenue has grown by about 4 billion dollars. The particular thing that Goodell has been able to do is unite...	[ "A developer buys a big piece of land, divides it up into lots, and builds a bunch of houses to sell to people. The developer sets up an HOA with some basic rules about how the neighborhood will work. In the contract the developer writes up to sell a house, the person buying the house must join the HOA. Also, the c...
Why do certain ethnicities seem to have a distinct smell?	[ "It will mostly be their diet; westerners will often detect the spices in Indian food, for example, while people from south-east Asia (where dairy products are eaten much less often) find that westerners give off the scent of old milk." ]	[ "place your shirt over your nose and mouth and breath shallow. Or kindly ask them to stop. Damn where is that legal? I’m in Cali people would call them damn cops out here" ]
How do they form the giant snow ramps at the Winter Olympics? And how do they prevent it from wearing down from use while still allowing it to be soft enough to land/crash on without breaking every bone in your body?	[ "For starters, they typically have solid molds that are covered in a lot of snow in order to keep the jumps from changing. The angles of the jumps and landing ramps are calculated, but the landing part is still the responsibility of the rider." ]	[ "It is called a carpal pad and is used for traction when coming down or resting on a sloped surface." ]
Why do my eyes never feel cold?	[ "You have different receptors in your body that send messages to your brain. Like receptors for pain, pressure, chemicals, and temperature. So your eyes don't feel cold because they don't have the right kind of receptors." ]	[ "You have probably been lucky, and not been exposed to as many contagious people. Do you have much contact with children?" ]
If a magnifying glass can focus light energy to burn things, why can't we apply this to solar panels?	[ "'Solar radiation' generally refers to light, albeit not necessarily of a visible frequency, and photovoltaic solar panels are powered off light rather than the heat that it can generate, but some solar power plants do just use the heat and these generally rely on solar concentrators. For reasons of practicality, t...	[ "Well, your finger is smaller than the Empire State building, right? Much, much smaller. But if you're looking at the building, and put your finger in your your line of sight, then you should be able to block seeing the building all together. Same as an eclipse. The moon is smaller, but much, much, much closer to...
Do centypede have the ability to use their feet autonomously, one by one, or do they use them in pairs or similar?	[ "Centipedes have ganglia in each of their segments which act almost as tiny brains that manage the motion of the legs attached to that segment. To walk a signal is sent from the centipede’s brain down through each of ganglia which then coordinate the motion generally in a wave down the centipede." ]	[ "The Central Processing Unit (CPU) has what's called an instruction set, which defines what the 1's and 0's do. It's kind of like a manual to follow for a specific set of letters or numbers, and in fact assembly language is made human-readable in this kind of mnemonic format, where for example in 6502 assembly, A...
If every action has an equal and opposite reaction, what's the opposite reaction to gravity?	[ "Gravity itself is not a one way street. You are pulling the Earth towards you with exactly the same force as Earth is pulling you towards itself." ]	[ "There are small, stone like structures in your inner ear which help you balance and know which way is up. These stones (otoliths) can get dislodged at times leading to something called BPPV (benign paroxysmal positional vertigo). Dix Hallpike maneuver diagnoses this and the Epley maneuver treats it. There are you...
When and why did the U.S. Military switch from using a "Palm Out" Salute to the current salute used today?	[ "I don't understand why everyone's replies are deleted here... I did some more research on my own and a better explanation I came across is that U.S. Navy Sailors would get their palms dirty handling line, which Officers considered insulting for them to show a dirty palm, so the Navy Salute was changed to Palms do...	[ "The Wikipedia article on [Tonsure](_URL_0_) is full of interesting information, but the history of it is somewhat brief. Seems like there were originally three types of tonsure. One was done in imitation of Peter who was said to have the top of his head shaved in mockery and the tonsure was to honor him. Another ...
How did ancient flora and fauna become the fossil fuels we use today, and why did it stop being produced?	[ "I'll answer your second question first. The living things that are alive today will someday die and turn into Oil. However, this process takes millions of years. Simply put, we are using the oil MUCH faster than it can be created at. While certainly things are still living and dying, the time it takes to turn the...	[ "Some things are already made in bacteria/yeast. However you need to consider some things: * starting materials: can the plant/bacteria/fungi import the starting materials efficiently? are they nontoxic to the host? * is the final product toxic to the host? are the intermediates toxic? * are the intermediates going...
Why does the United States spend such an obscene amount of money on the Military, but not on its education system?	[ "Part of it is the fact that the military is what allows us to be the Super power in the world. Without the strong military we would not be capable of living the life with the access to resources that we have and freedom of movement that we have. Now we could cut our spending almost in half and still have the best ...	[ "I gona mention 2 potentially viable arguments but that are quite a few 1: It takes technology to make technology. Its like an exponential growth that has taken a long time to build up. A modern example would be for our modern computers to work we had to figure out analog transistors and before that we had have to...
Did I see sun spots?	[ "Yep, you probably saw sunspots. The smoke does the same job as a solar filter does. That is, it cuts out a large portion of the light making it easier to see sunspots. A really cool view of the [Sun right now can be gotten from NASA's SDO.](_URL_0_) You can see a fairly large active region on the right (what we c...	[ "Follow-up question: has anyone ever witnessed a new star start shining?" ]
How does a Lie Detector work?	[ "The machine measures heart rate, skin conductivity, breathing rate and sometimes pupil dilation - all to the effect that it's not able to tell if you're lying. The machines don't work reliably." ]	[ "I think it is the same company that makes beer and from what I've heard, it was started to end arguments in the pub." ]
What would happen if a country adopted a foreign currency (for example, The dollar)? How does this affect the main country's currency and the country that adopted it?	[ "Some countries do use foreign currencies. One reason for doing so is if that country's own currency is not stable. [Here is the relevant Wikipedia article, \"Dollarization.\"](_URL_0_)" ]	[ "People's brains just work differently. Variables include, but are not limited to - Age, natural linguistic abilities, desire to change, use of language(s), etc. I would suspect those that maintain their accent tend to use their native language when speaking to others who also use speak that language natively. Wher...
How does the face determine where to form the next pimple?	[ "Your face is full of pores, which are little holes in the skin that work in many forms. These holes can be clogged with materials such as dirt and sometimes your body thinks of it as an infection and activates it defense mechanism to stop it. It seals the pore and sends in the fleet which causes inflammation and t...	[ "Piggyback question. Why is it if i pop one on my back it hurts and burns like Zeus stabbing me with lightning?" ]
How deep into Jupiter would one fall before "splashing down"?	[ "There would be no \"splash.\" It'd be more like a journey through increasingly dense gas. You certainly would end up in a liquid, but you would not notice the transition, just increasing density. The reason for this is because as the pressure and temperatures increase the material enters a phase called the super c...	[ "With some difficulty. This was an issue in the Apollo 11 landing. Neil Armstrong had to send a message back about slosh in the descent engine tanks, and the Apollo 12 descent stage was modified as a result. But in a launch, the tanks are tall and narrow. They start off full and there is little side to side motion ...

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