Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
Why do firefighters "make it rain" on a fire instead of pointing the hose at the ground or directly into the fire?	[ "What they are trying to do is prevent the area immediately next to where the fire is from catching fire. By doing this (in theory) the fire will have nowhere to go and eventually use up the fuel that is currently on fire and extinguish itself. The \"make it rain\" approach is common because it starves the fire of ...	[ "We have a pretty good map of the Interior solar system and major meteor clouds in our surrounding areas. By tracking these and modeling their movement in conjunction with their own orbital path, we can predict with a high degree of accuracy when our orbit will intersect with their pathway, causing them to enter in...
If alcohol is classed as a depressant, why does it make me feel confident and empowered when i drink it?	[ "A depressant is not something that causes depression. A depressant is the opposite of a stimulant, it makes you less focus and drowsy." ]	[ "Your brain is what tells you something hurts. Your body has millions of little feelers (nerve endings) all over that talk to the brain, and can tell it if something hurts. When something does hurt, the feelers will tell the brain where the hurt is coming from. What painkillers do is stop the feelers from being abl...
When did the custom of naming newly founded cities/areas with the prefix new- start? What was the first new city?	[ "This practice is ancient. The Greeks named a town they founded on the Italian coast Neapolis (New City); this is what is now known as Naples. Constantine renamed Byzantium to New Rome when he refounded it in 330 AD. The town of Salisbury was relocated in the mid 12th/13th century, with the new site being called Ne...	[ "Because (partially) the Constitution outlaws any sort of nobility: > Article I, Section 9, Clause 8: > > No title of nobility shall be granted by the United States: and no person holding any office of profit > or trust under them, shall, without the consent of the Congress, accept of any present, emolument, > ...
When synthesizing new elements, how do scientists know about the number of atoms they produced and how do they measure the rate of decay?	[ "> How can you measure something this small? The decay products of these extremely heavy nuclei hit your detectors. Then you can plot histograms, apply gates, and eliminate events which did not come from the nucleus you're interested in. Once you've eliminated all extraneous events, you just count the number that r...	[ "> How does an optometrist know prescription glasses work with little kids and babies? Using an [autorefractor](_URL_0_). It projects an image onto your retina, then measures how well-focused that image is as it adjusts the focus of its own lens. > Why don't they use the same technique on adults? They do . . . as...
Found nazi badges in a box of my grandparents stuff, not sure what’s real, what’s not	[ "You may need it to be authenticated in person by a historian. They have the equipment and tools needed to look them over. They're experts in fine details like the stitching, dyes, ect..." ]	[ "Viewing diaries. Nielsen used them right up until this year. They'd select families who would record their viewing habits and calculate ratings from that sample." ]
Why did the cost of US college tuition skyrocket?	[ "Universities realized that people were always getting approved for their federal student loans, so they kept raising tuition knowing that the students will be able to pay their crazy prices." ]	[ "I feel like this question is a bit outside of this subreddit's scope, it's really more of an economics question, plus if you look at [this graph](_URL_0_) then you can see that they were at very similar levels until around 20 years ago when they diverged, so anything following that violates the subreddits 20 year ...
What's actually happening in a freshly poured Guinness that makes it look like the bubbles flow downwards?	[ "It's because the bubbles on the outside of the glass stick to the glass and rise slowly due to friction. Bubbles in the middle can go up unimpeded. That happens with all beer. Why is Guinness (and Boddington's) special? Instead of CO2, if you charge a beer with nitrogen the bubbles are so small and plentiful that ...	[ "You don't need a nuclear weapon to create a mushroom cloud, but it helps. First, you need a sudden release of a great deal of heat. This heat gets the air around the explosion to expand and become less dense. The air rises fast — creating a vacuum around it, that sucks more air toward the source of heat, and warms...
How do American 20 amp plugs/outlets safely carry more current than their 15 amp counterparts ?	[ "They have bigger wires. You have to use 12 gauge wires for a 20A outlet, whereas you can use 14 gauge wires for a 15A outlet." ]	[ "Because a grandfathered in law can still be changed before it goes into effect. Sure, now it won't hit hard, but in 10 years when it's about to happen? People in Congress then are going to be de-elected if it actually goes into effect. So, they'll put it off, or scrap it. Besides that, setting a policy to happ...
Why do we kiss or hug a person to show affection?	[ "[Touching other people releases oxytocin in to the brain.](_URL_0_) That chemical helps form bonds between people, and leads to all sorts of generally positive outcomes in interpersonal relationships. Since babies all require touch and interaction with other people to get fed, we start getting out learning that to...	[ "Hi OP, this is a cultural question, so it would greatly assist anyone considering answering if you could specify which culture you're asking about. For example, the name of a cultural group / country / geographic region, plus a rough time period. Otherwise, this question is simply too broad, as it encompasses almo...
Why do body parts get hot after being injured?	[ "Increased blood flow. Blood starts its path in your core and is pushed out toward your extremeties. Your core temp can be several degreea higher than, say, the temperature of your hands. More bloodflow = more heat." ]	[ "Wow, lots of grammar nazis here. For lack of better words myself I'll leave this here for them: _URL_0_ There's a discusson on this here: _URL_1_ ...but I've also heard it is because your blood is flowing away from the cold areas, which exposes your nerves to the skin. Don't know about that now that I read that ot...
why can't there be cars that look as cool as lambos, but with cheap components to make them as cheap as a regular Honda	[ "There kind of are (see: [kit cars](_URL_2_)), but the problem is that nobody really wants them enough for it to be a viable large-scale market." ]	[ "1. The housing bubble collapse/credit crunch hit vacation destinations like the Hamptons extra hard. 2. Anything that isn't beachfront or at least beach-adjacent may as well be on the moon. People don't buy inland homes in the Hamptons." ]
How can a disease cost amount $X to the US government a year if healthcare is provided by private companies?	[ "Well the government does pay for healthcare for some individuals. Programs like Medicare and Medicaid provide health care for individuals who are over 65+ as well as individuals who make below a certain amount (133% of the poverty line), respectively." ]	[ "U.S. sales taxes are VERY Complicated. We don't have a national sales tax that applies evenly across the board. Sales tax goes down to the state, county, and even local levels. The tax you pay in one store could be completely different to the tax you pay in the store across the street in extreme circumstances. Plu...
The earliest days of Jericho - Walls before Agriculture?	[ "Well considering the location of Jericho, wouldn't it be possible that the walls are either to protect a consistent source of well water, or to protect against the unpredictability of flooding of the Jordan River? You might not be growing crops yet, but you like to have a place to stay that is close to a good sour...	[ "You would have to go back further in time than pre-colonization to see the \"natural\" climax state of the forests. American Indians practiced forest management at a large scale, using fire as their primary tool. Much of what became the eastern United States was covered in savannah, rather than dense forest. _URL_...
How were crows, ravens and pigeons trained to take letters from one part of a country to another?	[ "Slight follow-up/tangent: were crows or ravens ever used historically to carry messages? I was under the assumption that raven-based communication was unique to Westeros." ]	[ "If you're new to the thread, please don't post the Mythbusters episode again. Mythbusters is entertaining but it's not history (or more specifically, it's not historical proof of anything.) The short answer is no, not that we know of. /u/davidaop, our pirate expert, and I have both answered [questions about th...
why does the video quality decline when a video is reposted over and over again.	[ "Video compression is lossy, meaning data is permanently lost. Presumably in the cases you are talking about, the video is decoded and then recompressed using the hosting website's algorithm of choice. Doing this will cause more data to be lost, as the compression doesn't \"remember\" the previous compression algor...	[ "The business cycle. This is just how capitalism works--it goes from boom to bust and back. Actual hard answers are complicated bits of economics that are beyond an ELI5." ]
In school (the 90s, US), I learned about "Shi'ite Muslims." Now everyone talks about "Shia Muslims" and never mentions the other term. Why the change?	[ "Shiite Muslims are followers of the Shia branch of Islam, a noun when used this way. It can be an adjective as well. Shia- all the branches of Islam who believe in Ali and the Immams being the only rightful successors to Mohammed. Shiite were mostly in Iraq, Lebanon, and Iran with other pockets elsewhere, but th...	[ "Queen Elizabeth I was just, as you say, Queen Elizabeth. The new citations and additions of \"I\" were added after the ascension of Elizabeth II. As an example, if you look at the newer editions of Sir J. E. Neale's classic biography of Elizabeth I, you will see that from the first edition (published in 1934) he m...
why are some outlets so difficult to plug things into, while others are very loose?	[ "Receptacles deliver power to plugs via spring clips. Everytime you plug something in or take it out, the springs take some wear and tear. They wear out over time and are rated for x amount of timed you can plug/unplug . Cheaper receptacles are rated for less times while more expensive receptacles are made better/...	[ "Imagine you're trying to find a coffee shop in a city. If you've been there recently, it should be pretty easy to find. If it's been 10 years since you've been to the coffee shop or the city, it might take you a LONG time to find. It also might take long to find if you've been to other, similar coffee shops in the...
When my iPod is on shuffle and I press the next button, would it have played a different song if I had pressed next a millisecond later, or is the order of "random" songs already predetermined?	[ "Each time you set it to shuffle it generates a new song index. Clicking prev/next just iterates through that list." ]	[ "The Universe is a dynamic place. Stars have been observed to move around, some quite fast. We have seen a number of [supernovae](_URL_6_) throughout the centuries, including many in other galaxies in more recent years. [Supernova 1987A](_URL_3_) has changed since we first saw it (this is really the post-supernova)...
What keeps people who work at KFC/Coca-Cola from stealing a sample of their secret recipes, reverse engineering them, and then selling them?	[ "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...	[ "As /u/SVFeingold said it is easier to make a copy of a key from a picture than it is to copy the lock. The bigger issue here, from what I got in the link you attached, is that picture was of all of the master keys for the TSA. When you travel you are supposed to use a TSA approved lock on your baggage which the T...
Why UPS drivers do not turn left. How are 3-4 right turns equivalent to one left turn (in terms of gas)	[ "Mythbusters did this test, and despite the route being longer, they spent less gas, apparently idling is more costly on gas than you would think" ]	[ "In many cases, the package doesn't require a signature to be dropped off. If the package isn't too valuable, it's much easier for the delivery person to leave the package at your doorstep instead of waiting for you to come to the door (if you're even home in the first place.) More expensive packages will often req...
Is lithium flammable? If not, then why the smartphone lithium batteries explode when punctured?	[ "Lithium itself is flammable but lithium ion batteries do not contain lithium metal. The negative electrode is usually made of graphite, while the ~~negative~~ (edit) positive electrode is made of something like lithium cobalt oxide or lithium manganese oxide. These materials, like graphite, can reversibly intercal...	[ "'Oil' is a catch-all term for anything that is a liquid and not highly soluble in water, so some oils aren't lipids, and some of them are. Essential oils are most often not lipids. Orange oil, for example, is generally terpenes, primary limonene, which isn't considered a lipid. They are generally smaller molecule...
Levels of the Internet	[ "It's making fun of the people who believe that there are secret hidden \"internet levels\". There aren't really." ]	[ "Through fiber optic cables underground, above ground, or at the bottom of the oceans." ]
How can ligers and mules exist as offspring of two different species?	[ "They're close enough genetically to breed, although the offspring suffer from infertility (among other common birth defects), so it clearly isn't a perfect union." ]	[ "Imagine you are made of genetic soup. Some people have ingredients that just don't go well together and make the soup taste bad. But that's ok, because when you have a kid, we just take some of my soup and some of my wife's soup and pour it in together. So even though my soup has some bad ingredients, her ingredie...
What proportion of the Earth's total water supply is held in living organisms?	[ "From wikipedia the mass of all organisms aside from bacteria is about 560 billion tonnes. The mass of all water on Earth is about 1.386×10^18 tonnes. This gives an amount of: 0.000000404 Now I dont know if that water number included the organisms anyway and bacteria may well double that number for Earth's biomass....	[ "The island of Curacao has been using reverse osmosis for seawater desalination for years and has been making the process more and more effecient over time. Its not as large scale as an amarican city would need, but they produce all the drinking water for two Caribbean islands." ]
How do logic gates work?	[ "MOSFET Transistors have 3 Pins, the source, drain and gate. When a voltage is applied across the gate, the area between the drain and source is depleted of electrons, creating “hole” charge carriers. Basically, imagine a highway between two cities jammed with traffic. I open up an exit, some cars leave the highway...	[ "Like this! Oh, sorry. Forgot you weren't a real 5-year-old." ]
What is wrong with the question "What existed before the Big Bang?" I have been told that this question doesn't make sense, but I have NEVER heard a decent layman's explanation as to why.	[ "It's unanswerable. That's what is wrong with it. It appears that time itself began with the Big Bang and so asking what happened before the Big Bang is like asking, \"What is north of the north pole?\"" ]	[ "Yer not alone in askin', and kind strangers have explained: 1. [ELI5: Whistling ](_URL_6_) 1. [ELI5: How does whistling work? And how is it different from blowing? ](_URL_0_) 1. [ELI5: How does whistling work? (Wind/air pressure to sound with whistles, bottles, or lips.) ](_URL_4_) 1. [ELI5:How does whistling work...
Is there a chemical with a triple point at, or around, STP?	[ "I think you're looking for [Cyclohexane](_URL_0_). Although I wouldn't try it at home. Cyclohexane is pretty bad for you and it may be carcinogenic." ]	[ "Corn starch, but only if you run. A supersaturated solution will become solid under sudden stress, but remain liquid otherwise." ]
Why is it satisfying to chew then swallow food, but not nearly as satisfying to just chew and spit it out?	[ "This has basically already been answered - I'll just throw in that bulimia has basically nothing to do with taste. It's a complex and severe psychological condition that includes fear of gauning weight, feeling shame from eating anything, low self esteem and depression. The food isn't eaten for the taste. And it i...	[ "There's a very interesting theory about this, called the sperm (or semen) displacement theory. It goes a little something like this. Way back when, humans, and in particular, human males, weren't so much into the pair-bonding thing, and women regularly had sex with multiple men. This meant that the sperm in the wo...
Why don't more countries worried about a declining population (Japan, Denmark etc) take more the Syrian refugees?	[ "They worry about a declining population because that puts a lot of strain on their social system as it will lead to the situation where their social system will be paying more people (retired people) than it will have people contributing (working people). The problem with taking in refugees is that many of this wi...	[ "Nuclear engineer here. 1, U235 absorbs neutrons of much lower energies than 238; the spectra are almost exclusive. That's why you need moderation (= slowing down the neutrons). Fast neutrons 'ignore' U235, slow neutrons 'ignore' U238. 2, Now how exactly would you 'add' U238 into enclosed, solid state ceramic fuel...
Why do US grocery stores refrigerate eggs while UK stores do not?	[ "In the US, eggs have to be washed. This reduces the chance of salmonella contamination, but it also washes off a protective layer that keeps bacteria from entering the shell. As as result, we have to refrigerate them to keep bacteria from growing. In Europe and many other places, the eggs aren't washed. This means...	[ "Because imagine how long that one line would be. Imagine trying to navigate shipping carts in a confined space like that. It works in banks because it's only a person standing there, so you can queue up 20 people in a small area by doing that snake-style lineup." ]
How is it possible to be completely protected against having my identity stolen?	[ "Never go online. Never use a credit or debit card. Never get an ID card or government ID number. Make sure you never did any of these things in the past either. Also, when you are born, make sure you and your parents move to the woods and never have contact with other humans. Seriously though, until this year (201...	[ "This video created by Vsauce 3 (Jake Roper) does a very good job explaining this: _URL_1_ I hope this answers your question. He also did another video on a simmilar line of - could you survive: _URL_0_" ]
What are random "flash memories", and what is going on in the brain when they occur?	[ "Huh. I've never heard of this, and I do research into memory. Maybe I'm not understanding. Could you describe the situation more?" ]	[ "Non-expert here, but isn't it just an adrenaline surge? It's just the muscles getting twitchy in preparation to bolt at any second. _URL_0_" ]
What actually happens when you burn steel wool?	[ "Check out this [link](_URL_0_). Basically, the rapid oxidation of the metal occurs because iron wants to oxidize and the high surface area of the wires allows this process to occur very rapidly at these high temperatures. Oxidation is the iron changing what are called oxidation states where it has the same number ...	[ "In cookery we have dry heat and wet heat. Wet heat is boiling and stewing - effectctively cooking by immersing in warm liquid. Dry heat is grilling or deep frying. Deep frying counts as dry heat since once the skin crisps, further oil does not penetrate it. Microwaves heat the water molecules in the food, and cook...
How do Companies Like Kfc, Mcdonalds or even Coca Cola protect their recipes? wont modern science be able to breakdown whats exactly in the food they serve?	[ "Yes you can break down the exact components of something like Coke and see what is in there. It won't help. I could tell you a house is made of several hundred boards, a few thousand nails, hundreds of pounds of gypsum, various types of metals (copper, iron), some plastic, and some other stuff. Does that help you ...	[ "I believe YouTube has an algorithm that scans the audio of uploaded videos and matches them against a database of known songs. Probably also uses track length and description/tags to make things quicker. A full album might contain all the songs, but the algorithm doesnt detect that because 1. It's longer than any...
Why can't people who make videos on youtube or stream on twitch say how much they are paid ?	[ "like /u/Sand_Trout said, they are bound by contract not to disclose their earnings. The payments to youtube video producers are determined by ad revenue, and the deals that youtube has with their advertisers are a trade secret. If other people could get that information, they could under-bid and steal advertisers,...	[ "In the American legal system there is no legal obligation to report a crime or volunteer information to the police. It is criminal to help someone cover a crime up, or make it harder for the police to discover. It is criminal to lie to law enforcement during an investigation. And if subjected to a subpoena you mus...
how come we in the United States can't afford to pay for healthcare like Canada does? I understand Canada has a lot less people but Canada also brings in a lot less money. PS this is not a political statement at all I live in the US and I really don't care one way or another I have insurance	[ "The US could pay for universal health care several times over. Affording it is not the problem." ]	[ "Yarr! Yer not alone in askin', and kind strangers have explained: 1. [ELI5: Why do humans feel the need to wear clothes when the rest of the animal kingdom is naked? ](_URL_6_) 1. [ELI5: Why do we wear clothes? ](_URL_0_) 1. [When, why and how did we start wearing clothes? ](_URL_3_) 1. [ELI5: Why do humans, unlik...
Can the history of a country determine their genetic identity properly?	[ "While you might find an answer here, you should consider posting at /r/AskAnthropology as well!" ]	[ "This submission has been removed because it is [soapboxing](_URL_1_.) or [moralizing:](_URL_0_) it has the effect of promoting an opinion on contemporary politics or social issues at the expense of historical integrity. There are certainly historical topics that relate to contemporary issues and it is possible for...
When an animal dies of something how does it pass on this innate fear of something to help offspring survive?	[ "It doesn't. Instead, it's those that have the innate fear already that are less likely to be killed by that thing, and thus have offspring that have that innate fear (to the extent that it is genetic) or are taught it (to the extent that it's learned behaviour)." ]	[ "This is a very large topic area, so I'll just touch a piece of it and leave you with a more thorough source. In the case of birds, it has generally been found that birds raised in total isolation from their own species will eventually start singing regardless, and that song will resemble the songs sung by other in...
Why isn't more money flowing down the science/scientists drain?	[ "This isn't directly answering your question but.... I don't know if you are a gamer or not if you are I recommend you play Civilization 5. You will be able to see first hand what happens to a nation if it puts all its resources into building technologies/sciences. Your nation would fall pretty quickly to either an...	[ "Sugar tastes good. When faced with a choice between that which is smart and that which is pleasing, most people will spend their money on the latter. A business exists to sell people what they want to buy, not what some might feel they should buy." ]
When beryllium-16 decays and produces 2 neutrons simultaneously, what happens to that dineutron?	[ "The dineutron immediately splits apart into two neutrons. The dineutron is an unbound resonance, which decays on a timescale of 10^(-22) seconds. The neutrons are held together momentarily by the residual strong force. At the lowest level, from QCD, you could say that this force is a result of gluon exchanges betw...	[ "> because each flavor has a different mass The flavors don’t have well-defined masses. There are three mass eigenstates and three flavor eigenstates. But a neutrino or a given mass is a superposition of all three flavors, and a neutrino of a given flavor is a superposition of all three masses. If the flavors had ...
Sungazing as a method of nutrition and sustenance	[ "People justify anything. Now, sunlight is important for vitamin D production in the body. So it isn't completely bull shit, but you aren't going to get everything you need from the sun. There's a reason why people starve." ]	[ "There is a more efficient version. [This is a solar system.](_URL_0_) [Here's another.](_URL_1_) They reflect light from the sun onto a pipe filled with a fluid, probably petroleum, which then is used to heat water." ]
How does spilling sugar cause an ant invasion in my house?	[ "You did have ants. Just a scout or two. That scout reported back and told his buddies to come and feast on the bounty." ]	[ "If they left a pheromone trail and could locate it, or one left behind by another colony member they could find their way back. If not they are lost forever." ]
How do they decide how many dollars are in one Euro or vice versa?	[ "In a very real way, you and I decide. If I want Euros for Dollars and the price is too high, I can offer a lower price or wait it out. Same for you if you want Dollars for Euros. Eventually, if we come to an agreement, we establish the value of Dollars per Euro and Euros per Dollar. The exchange rates of *freely...	[ "If you have Netflix there's a very good documentary titled \"the world without US\" It explains your exact question." ]
Why is money such a taboo topic?	[ "people don't want to find out they make less than someone else, its fairly natural. Its a pretty universal thing, no one likes being ashamed. If you're hanging out with friends and money comes up, and one of you makes a lot less its going to be awkward. Money and religion are two topics that discussing never leads...	[ "Ok, give me $1000 and then I won't pay it back. Does that sound good to you?" ]
Please explain why Iran is a focus for intervention, when more volatile countries like Pakistan and North Korea already have nuclear weapons and we don't make a big deal of it. USA, sorry.	[ "People do make a HUGE deal that countries like North Korea and Pakistan have nukes. Its a major concern, its scary, and the world appeases their needs. But here's the kicker... they already have them, there is no going back. Once a country has nukes, they are so utterly terrifying to other countries, that they bec...	[ "There once was a playground in which two children were playing. Their names were Israel and Palestine. Israel asked, \"Why are we fighting?\" Palestine said, \"I don't know. Let me search for an answer on my computer. There's a search box in the corner of my screen and this question gets asked on a daily basis.\"...
Why did China never explore the world like Europeans?	[ "Under the Ming dynasty, China adopted a policy of Haijin, meaning \"sea ban\". Convinced that it was already the most advanced country in the world, the Chinese Empire became isolationistic and inward-looking. By the time they realized that the Europeans had become more advanced, there wasn't much they could do ...	[ "For the same reason that people who are blind from birth can't imagine color at all - imagination is about creating new combinations of stimuli that your brain is already familiar with." ]
Why does bottled water have expiration dates?	[ "The actual plastic in the bottle will decay and somewhat \"poison\" the water inside. Note however that no company would put the expiration date as the point at which the water becomes dangerous. In other words, the expiration date gives a rough estimate for when the bottle is probably becoming a bit unhealthy, bu...	[ "Your question reminded me of this frikkin awesome documentary of about planned obsolescence. [Video snippet](_URL_0_), and the whole documentary, I can't find... but Im sure someone else may be able to. ELI5 version: Because companies want you to keep them in business." ]
What causes the “dope lean” when someone is overdosing on heroin/another opioid? If opioids are meant to loosen you up, why does the body appear to be locked in that position?	[ "Pretty much it comes down to their body still functioning, even in a really messed up state. They aren’t technically unconscious, and their natural instinct to stay upright is still going strong. Their body keeps falling but the natural reaction to straighten back up before they collapse happens." ]	[ "Hey, mechanic here, I'm guessing you missed something. Engine hoists require almost no effort to work the lever and lift an engine. A small child should be able to pump the lever. Now there are pins that lock the lift arm in different positions, if it was locked when you tried it, then it will never move and you c...
What is the big deal with all of the corn based food products?	[ "The documentary Food, Inc. does a pretty good job at taking a look at the corn industry. It has some bias, but, it's certainly a good place to start." ]	[ "\"Just about everyone here\" Where is \"here\" for you? It sounds like your question's premise is based on a small sample set based on personal observation. Before your question is addressed, you should be making sure the premise is valid..." ]
Why does sunburn tend to be more severe near the edges of clothing?	[ "If you get sun exposure frequently, the exposed areas of your skin get darker to protect it from the sun (think farmer's tan). The places that are not covered near the edges are not as well protected and can burn if your clothes shift. With the same amount of sun exposure, these areas will have a more severe sunbu...	[ "your question is based on a confusion of scale. life on earth lives within a very sensitive, and relatively narrow temperature range. the most extreme temperatures between night and day or between seasons even is orders of magnitude less than the temperature changes which occur on other planets. in other words, o...
Why does the end of a beer/bottled drink always taste bad?	[ "When drinks sit in a container for a long period of time, anything solid will settle to the bottom. This will be concentrated in the last bit you drink. However, this generally only occurs with unfiltered beer and juice with pulp. More likely is that the last bit of the beer/bottled drink has been warmed up closer...	[ "I ain’t no scientist but here is my two cents... Fruit is designed to ferment (rot) as part of its ability to seed. When fruit falls from a tree (or is picked) the fruit starts to ferment which releases natural sugars making it sweet and juicy - eventually you’ll see the pips, seeds or stones becoming easier to re...
How important was Thomas Wolsey in the court of Henry VIII	[ "Wolsey was an incredibly important power in Henry's court. As Lord Chancellor, he was the King's primary adviser, and since he was chancellor during Henry's younger years, he was potentially more involved in decisions of the state than the average Lord Chancellor would have been. His relationship with Henry allowe...	[ "There was a good programme about this on the BBC a few months ago. Bill Bailey successfully campaigned to get Wallace's portrait put up in the Natural History Museum. Unfortunately it's not on iPlayer any more but you can watch some clips here - _URL_0_" ]
Is the difference in air pressure around the world significant enough to make you throw a ball, for example, even a millimetre or so higher in low pressure areas compared to in areas that experience high pressure?	[ "You might be interested in knowing that ballistic propagators (programs which determine where a projectile will fly on the Earth) are really quite sensitive to temperature, and temperature is related to air pressure. For instance, on an average projectile which flies 5km, the difference between flying in 60 degree...	[ "Point a flashlight at the wall and turn it on. See the small circle? Now, let's say your flashlight is delivering xyz power to the wall. So xyz power is landing in that circle, right? Tilt the flashlight in any direction. The circle spreads out across the wall doesn't it? But you didn't change the batteries or any...
To what extent is it true that the Palestinians have turned down several 'reasonable' offers from Israel for full statehood?	[ "Hi there! This is a reminder to potential respondents to this question that we have the [no current event rule](_URL_0_) in effect that in order to discourage off-topic discussions of current events confines questions, answers and all other comments to events that happened 20 years ago or more, inclusively (e.g. 1...	[ "Hi, I've approved the post, but just a note to you and potential respondents: this subreddit has a 20-year rule against discussing current events, so any answers will have to cut off at 1997. If you're looking for answers that can include 1998-2012, do consider x-posting elsewhere, eg. a foreign affairs sub like /...
How do our bodies maintain their position on the bed during sleep? What part in human evolution caused this?	[ "As far as I'm aware it's fairly simple, falling out of trees sucks. You're a monkey! You love being in trees, swinging from branches and all that jazz, in fact you love trees so much you even sleep in them. But, if you are sleeping you can't see what's going on, you can't move about when you don't have a full pic...	[ "I recommend reading 'At Home' by Bill Bryson. He goes through this in detail. From what I recall, houses used to be just one big room, animals, people, servants all in the one place. Over the centuries, people got bette at building walls, so they built these buildings higher - this showed your wealth and was much ...
When waves interfere, what happens to the energy that they are carrying?	[ "There is a lot less magic and mystery to this than the thread would have you believe. Energy is conserved. If you have a condition with destructive interference, there is consequently constructive interference elsewhere to balance the energy. > But wait a minute, dude, can't I set up two waves to be perfectly...	[ "[This figure should help explain it.](_URL_0_) A shows 4 waves each with different frequencies and C shows what you get when you combine those waves together. (Ignore B and D). A combination of different sound waves creates a single wave with a unique pattern. So instead of a speaker moving in and out by same amou...
- How important actually are exams?	[ "Did your teacher tell you how tests are weighted? I'd expect them to be between 15% and 25% of your total grade (each). Edit: Clarity" ]	[ "When you add a file to your computer, it gets put in the first available space - even if that space isn't big enough to fit the entire file in. If the space isn't big enough, the file gets SPLIT into several pieces and put in different places. Over time, constantly adding and deleting things means that all the stu...
Why are we scared of these certain physcial features?	[ "the effect is known as [the](_URL_2_) [uncanny](_URL_1_)[ valley](_URL_0_). we know what other humans look like and we are very attuned to when something is off. on some level your brain says \"this is NOT what a normal person looks like\" and starts throwing red flags. Avoidance of disease is one of the theories ...	[ "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." ]
I'm a black soldier in the U.S. army stationed in Britain during WW2. How am I treated by the locals?	[ "While not Britain, the presence of African-American troops in France created tensions both within the US force and between the US and local French authorities. As Mary Louise Roberts recently noted, soldiers often sought out sex during the invasion and occupation of France in 1944 and '45, including African-Americ...	[ "Most of the time they did dead reckoning. That is to say that they went in a straight line until they either hit something or until they figure they have gone far enough. This did actually work sometimes but at least it brought you closer to your target. They would also pop their heads/periscope above the water fo...
How does leg hair know to grow back when shaved?	[ "Hair growth doesn't stop. The hair on your legs falls off long before it has a chance to get as long as the hair on your head, for example. See explanation here : _URL_0_" ]	[ "Wow, lots of grammar nazis here. For lack of better words myself I'll leave this here for them: _URL_0_ There's a discusson on this here: _URL_1_ ...but I've also heard it is because your blood is flowing away from the cold areas, which exposes your nerves to the skin. Don't know about that now that I read that ot...
Why do we stop '' breathing automatically '' when we are aware of our own breathing?	[ "You kinda answered your own question. When we're not aware of our breathing, the brain controls it automatically, through what's called the autonomic nervous system. This is also responsible for other functions like heartbeat and blinking. We can control all of those to a certain limited extent, but not too much, ...	[ "Think of your brain like a billion streams of water that flow over the surface of a rock. The more you use a certain stream, the more \"powerful\" that stream becomes by digging away that rock. Now even if you have a nice dug place for a stream, sometimes randomly that stream won't have needed to flow for a while ...
How does the British Royal Family make their money? Or do they even need to? Is there an income?	[ "They have some personal property that provides them with an income, mainly in the form of land rents. For the soverign, they get the Duchy of Lancaster, while the heir to the throne has the Duchy of Cornwall. These monies can be saved or invested or given away. For instance, Prince Charles has invested in [organic...	[ "Most of the interior filming is done in Highclere Castle, aka the Abbey, with the exception of some sets which were built in studio. Considering that most shots are done in actual historical places, it's possible that they aren't allowed to film smoking shots indoors due to the preservation of the houses. However,...
How did the Maya react to the end of the 11th b'ak'tun?	[ "Before I answer, may I ask who the speaker is for this particular lecture? Or if you have a link for me to listen to? I would like to know where they are coming from in their argument." ]	[ "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 are words created?	[ "No, they come from various languages. If they come from another language, then generally they are just adapted from another language, but with an accent change. If you are asking how words, as a concept began, then it's really simple. Two guys stand next to each other. One points at a tree and says \"Ch-re-ee\" th...	[ "This is essentially a linguistics question. I recommend submitting to /r/linguistics." ]
How does the body always know how to regenerate and doesn't grow another leg when you scrape your knee ? Is there a kind of blueprint of the body in the brain ?	[ "Building the body isn't really under the control of the brain. At least not in the specific sense you're describing. The brain can respond to injury and respond by activating more or less whole body responses like hormone levels and changes in blood flow, but largely the wound healing process is controlled by dire...	[ "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 is the purpose of ketosis?	[ "Yes the brain can only use glucose and ketones as a source of fuel. Also ketones allow energy to be mobilised to tissues that don't directly store fat such as the brain." ]	[ "Nothing that any other fizzy sweet drink doesn't do. Kombucha has no real health benefits. It's all hype." ]
How did the Radioactive thing keep astronaut Mark Watney warm and would he not have died from radiation	[ "1) The RTG is pretty simple actually. It is basically a small amount of radioactive material that is so radioactive that it is constantly decaying. That decay generates heat... which the RTG converts into electricity... and a shit load of excess heat. 2) Yes 3) It is contained in multiple layers of material that a...	[ "> I think it's just a delay in the OS's process to update the display And you are almost correct. It's not the display (which can be updated immediately), it's the OS that takes a little time trying to reconnect to the network before deciding it is really down. Your roommate doesn't know what he/she is talking abo...
If I leave water in a plastic bottle for a few days, does it become unsafe to drink?	[ "It depends on what's in the bottle besides water. If you drink out of the bottle, then bacteria from your mouth will end up inside. Unless it's been sterilized, there will probably be bacteria in the bottle/water before you fill it. If there's anything for those bacteria to eat, they'll multiply." ]	[ "Biology student + Was a mouth breather - Sore throat - You'll inhale more microbes and bacteria since there is no filtration system in your mouth - Your teeth gum will be exposed more to bacteria, resulting in inflammation. - Bacteria in your teeth will flourish since they have more oxygen resulting in more teeth ...
What's so bad about Detroit?	[ "Poverty Jobs left the city at an ever accelerating pace over the past few years and this has led to lower and lower incomes and, consequently, higher crime and lower property values. As it gets worse fewer companies would think of moving in and bringing back jobs and the situation worsens and worsens. Their econo...	[ "The more money that is in circulation the lower the value of each denomination of that money. So a dollar today may get you a candy bar, but after the government prints a whole bunch of money that same candy bar may cost you three dollars." ]
How important were mountains and rivers to medieval borders?	[ "Exactly, geographical features offer precise borders. Mountains are especially useful, as more often than not their economical value is small. Rivers are very different manner, they were very important part of nations infrastructure before railroads (and still significant afterwards, even today) and sharing river ...	[ "the hurricane thing - > iirc those are powerd by warm wet air which is generated over the ocean. once you hit land that power source is lost and the storm dissipates. snow storms - > that has to do with north american geography - > no east/west mountain ranges do not block storms coming from the north. Eg. in Euro...
Why does blood taste like copper even though Iron is by far the most common metal in blood, and even then there is not much?	[ "Blood tastes like \"metal\" because it has a lot of iron in it. We call it a \"coppery\" taste, but it is the iron that you're tasting." ]	[ "Capillary action, and your legs have this giant artery called the Femoral Artery. As the blood moves through the leg and foot (that is uncovered) it is cooled by the outside air easier, and returned to the body a bit cooler. With the capillaries spread over the feet, and skin it gets more surface area to cooler ai...
What happens when you don't remove your USB device safely?	[ "Its there simply as an extra level of security preventing you from destroying your own files. Doing so causes the files to close \"gracefully\", preserving data, pointers and file size indicators. When writing to disk the computer doesn't always \"flush\" a buffer and only part of the data may have been written. U...	[ "It's called the oligodynamic effect. Here you can read about it, but usually it's pretty easy to google these types of questions: _URL_0_ Apparently several heavy metals do it including copper (Brass is an alloy of copper) and silver. Basically heavy metal ions bond with bits of proteins in bacteria and make them ...
How "close" are different human ethnicities? For example, obviously a person from Vietnam is closer to a person from Thailand, than a person from Nigeria or Finland. Has anyone ever systematically studied this?	[ "My recollection of a study of genetic variability is that all the races outside of Africa are fairly close compared to those within Africa, who differ quite a bit more among themselves." ]	[ "Context is important. I'm not surprised to see a hot dog at a hot dog stand. I'd be surprised if I opened my wallet to pay for a hot dog and it only had a hot dog inside. I'm not surprised to see beach clothing at a beach, but would be concerned if I'm about to go into surgery and the surgeon shows up in a speedo....
What would happen if we had a supersonic submarine?	[ "you'd get a shock wave. you can see this on a small scale in the pistol shrimp. it snaps its claws so quickly that it creates cavitation bubbles that produce shock waves when they collapse. practically, though, i can't imagine a submarine could ever really exceed the speed of sound in water. current submarines ca...	[ "[Identity concealed] is not correct. You can run on water ([just watch this cute little lizard do it!](_URL_0_)), and you can do it at a speed significantly slower than the speed of sound. The exact speed required depends on the surface area and shape of your feet, the frequency and force of your steps, and the su...
What are domestic history classes like in countries with long history?	[ "I'd also like to ask Americans what state they live and how far their high school US history class got before the end of the year. How many got past Reconstruction? Did any get past World War II?" ]	[ "Is this a homework question? It says in our [rules](_URL_0_): Our users aren't here to do your homework for you, but they might be willing to help. Remember: AskHistorians helps those who help themselves. Don't just give us your essay/assignment topic and ask us for ideas. Do some research of your own, then come t...
The difference between a dual-core 1400 MHz and a quad-core 1400 MHz mobile phone processor.	[ "I think what your asking what's the purpose of multicore processors. The 1400 MHz is clock speed which is the max frequency at which transitors can switch. The higher the frequency, the faster the processing for a single core. The purpose of cores is to split up tasks. With most applications on a phone or tablet, ...	[ "Taliban - Tribal alliance from Afghanistan. They want control of Afghanistan/Pakistan, as that is the territory they are present in. ISIS/ISIL - Product of the Syrian Civil war, their organization is attempting to create a unified Islamic state throughout the Region they are present in. Al Qaeda - International or...
Why do members of the British royal family use the surname Wales during military service instead of Windsor?	[ "A house name isn't a last name and the way last names are normally passed down. The surnames of commoners are taken from the father and passed to the children. Prince Harry, for example, belongs to the House of Windsor by way of his mother rather than his father. Being in the house isn't a linear thing - it just...	[ "The definitive book of the finds from the battle is [Bengt Thordeman's Armour from the Battle of Wisby: 1361](_URL_0_). This is the definitive published work by the archaeologist who excavated the original site. I do not believe it is a full and complete catalog of each item, but it provides extensive detail and i...
Why does the taste of water change depending on its temperature?	[ "The temperature of water has a direct correlation with its ability to dissolve minerals and carry gasses. The warmer water is, the greater its ability to have dissolved salts, either from deposits in your plumbing or more likely from your local water supply. Conversely cold water holds more dissolved gasses like ...	[ "We have separate sensors in our skin for sensing hot and cold temperatures (known as thermoreceptors). These sensors will get activated at specific temperature ranges (i.e. cold temperatures for cold thermoreceptors and hot temperatures for hot thermoreceptors) and the activation of these separate receptors is how...
Why can't I eat or sleep when going through a really stressful situation	[ "Glucocorticoids. Your body releases these hormones in stressful situations to aid in the ol fight or flight response, (Back from when our stressors required such response .. Being stalked by a large predator, etc. Issue is that we now feel stress in situations that don't require these reactions so these chemicals ...	[ "Because the animal inside you activates and you engage in \"Predator\" mode, doing everything in order to secure food and guarantee the survival of your species." ]
Why do reporters still use overly large hand-held microphones instead of headsets or a boom mic off screen?	[ "Hard to interview people with a headset mic and news crews usually consist only of the camera person and the reporter, which leaves no one to hold a boom mic overhead." ]	[ "I may not be a planetologist, but I think there's a big reason that everyone else is missing here. Mars landers are fragile things. The last thing NASA or anyone else wants to do is have one crash into a big boulder or topple over on a steep hillside. So NASA very specifically chooses landing sites they know _lack...
Why are we so weak compared to other primates?	[ "Basically, you have to be weaker if you want the kind of fine muscle control we have. Chimps and gorillas physically could not do the kinds of things we can do with our hands - sculpture, art, writing, etc. - because of the way their muscles are attached to their bones. They have better leverage because their an...	[ "Our intelligence. Tool making and fashioning weapons and traps seems to be our best bet." ]
If tobacco, nicotine, no cigarette smoke are so harmful to the human body, why does the FDA allow them to be sold?	[ "Exhibit A - [The 18th Amendment of the US Constitution which established prohibition](_URL_0_) Exhibit B - [The 21st Amendment of the US Constitution which was ratified just 13 years later and repealed the wildly unsuccessful and unpopular 18th Amendment and ended prohibition](_URL_1_) Prohibition doesn't work. ...	[ "It's an archaic rule. When the NFL first went on TV, every game was blacked out in the local area to make sure local fans went to the game instead of staying home. However, in 1972 the cellar-dweller Redskins made the playoffs, but President Nixon and other DC politicians couldn't watch the games. The next year Co...
When did six feet become the standard Western burial depth? Why?	[ "Is there any evidence that it was ever the standard burial depth in practice? I'm aware of the expression and the fact that Daniel Defoe cited it in his fiction, but I don't know that it was ever a legal requirement or custom of burial. In many cases the terrain would make it impractical to dig that far down." ]	[ "Just as a follow-up question - with this sort of topic, is it possible to give a really solid answer if there is no source that says \"there is no evidence of this?\" This isn't my field at all, so I'm really curious about how this sort of question is answered. Is a better response one that examines where such a s...
How did banks work in the Soviet Union? Were people allowed to save money and accumulate wealth? Was there personal lending? How did this all work in the soviet communist system?	[ "How exactly did labor markets (or whatever was in their place) function in the USSR? How did planners determine what was being paid (if this is a fair way to characterize it)? Did wages differ by trade/region/labor supply, and if so, how was this decided?" ]	[ "Yer not alone in askin', and kind strangers have explained: 1. [ELI5: How do snakes move? ](_URL_0_) ^(_7 comments_) 1. [How the fuck do snakes move? ](_URL_4_) ^(_1 comment_) 1. [ELI5: How do snakes move so fast? Actually how do they move forward at all? ](_URL_5_) ^(_4 comments_) 1. [ELI5: How do snakes move for...
Do Spacecraft use regular ATC like other planes? (Centers, Departure/Arrival, towers)	[ "No. At launch a large exclusion zone is established, within which no planes or boats are allowed, and if one strays in then the launch gets cancelled (or 'scrubbed'), as happened recently with a SpaceX launch. By the time the rocket has left that exclusion zone it's too high for ATC to be concerned with it. For or...	[ "Star Trek has some battle scenes that has craft all on differing headings and axes. I think the Battle of Wolf 359, vs the Borg was a good example. But I agree. It seems that they always rendez vous eye to eye" ]
Why professional thieves are interested in stealing famous art and artifacts if they can't sell it because they'd be caught?	[ "Either they want it for themselves or they have a black market buyer. In general, they'd get caught if they tried to sell it to someone legitimate. Selling it to a specific person is far less dangerous." ]	[ "As /u/SVFeingold said it is easier to make a copy of a key from a picture than it is to copy the lock. The bigger issue here, from what I got in the link you attached, is that picture was of all of the master keys for the TSA. When you travel you are supposed to use a TSA approved lock on your baggage which the T...
How can the worlds global debt be more than 2.5 times the total money supply?	[ "It's pretty easy to create debt, because each dollar can be lent out more than once, and used more than once to pay back a debt. Say you're at a restaurant: between when you order and when you pay, there's a debt owed to the restaurant. Meanwhile, their servers work today, but get paid tomorrow - there's another d...	[ "There are various ways but two I'm familiar are: Fake businesses. I import something from the US and overpay for it in dollars. For simplicity, I set up a fake \"designer\" jeans company in the US or find a friend who owns one. I pay him $1,000 per $10 Jean I buy and import to China. I sell the jeans in China and ...
When did adultery stop being a punishable offence? Has it ever been at least in the eyes of the law?	[ "Under the United States' Uniform Code of Military Justice [Article 134](_URL_0_) adultery is still considered as a punishable offense. People being people, it isn't hard finding examples of people [still facing court-martial for it.](_URL_1_)" ]	[ "There are a lot of people in the world who don't care about laws, or the laws of other countries, or the property rights of other people. For example if you stole a piece of art from someone in England that a wealthy member of the royal family in Saudi Arabia wanted they probably don't care at all that it was stol...
If you were to put on glasses that only let yellow light through, would a monitor appear completely dark?	[ "Acording to [this](_URL_1_) and [this](_URL_0_): NO. Liquid crystals are not totally selective of the colors they let through. When green and red dots are activated, they let through a decent amount of yellow as well. Another thing: Your eyes also only consist of green, blue and red \"detectors\". So, how come we...	[ "> and we never will see the object disappear into the black hole We will. You'll quickly receive the last photon ever. Mathematically the intensity will never go to zero, but a 10^-100000000 chance to receive another photon in the future isn't going to matter in any way. If you want to have something that stays vi...
Are DNA imprint fossils possible?	[ "Unfortunately, they aren't possible. The problem is one of resolution—fossils can capture structures that are small and delicate on human scale, but DNA base-pairs are small even on the scale of viruses. Viruses are around 100 nm in size, while DNA base pairs are [about 2 nm wide](_URL_0_). A fossil of DNA, even i...	[ "We can and do, but it is far too complicated and expensive a process to be practical. _URL_0_" ]
Why are palm trees so tall?	[ "There are lots of short palms around as well, height isn't universal. Plants in general grow high because they want to be in sunlight as much as possible, if you're higher than all other plants around you, you will never be in the shade." ]	[ "I remember it being like that to act as a pump that would pull out a competitors semen. That, or it's there to make sure your hand doesn't fly off and hit you in the forehead when you're whackin it." ]
Why people with PTSD have a different look in their eyes?	[ "It's the [thousand-yard stare](_URL_0_). Basically it's just dissociation from trauma." ]	[ "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." ]
How do chameleons change the colour of their skin in order to blend into their surroundings? And are they consciously aware of this change or does it happen automatically?	[ "No one really answered your question, but they actually change their color based on mood. They don't change color to match surroundings. Go take a look at panther chamillions. They are so expensive cause they are brightly colored. Just so you can see a different color than green you're used to." ]	[ "...Why do they have default subreddits? Do they ever remove them? What makes a subreddit default-worthy? I'm five years old, please explain... Thanks in advance! Also, before they add a new subreddit to the default list, do they ask the owners' permission first?" ]
does standing for a minute an hour have a significant impact on a person's health if they would've spent most of those hours sitting down otherwise?	[ "Not significant, no. Though it takes 80 muscles to stand, our bodies were built for it. You will only get fatigued from standing after a few hours doing it, unless you weigh too much. So no, standing for 1 minute out of sixty does not offset the comparable lethargy." ]	[ "In The Recollections of Rifleman Harris, they walked, everywhere. I mean miles and miles and miles. All the time. That kind of constant movement will keep you trim. For example, when Harris enlisted, he walked to where his training and post were, then walked to port to take a boat to Ireland where he walked everyw...
Has there ever been anything in our culture that has been on the same or close too fandom as Beatlemania? (x-Post from beatles)	[ "Elvis. How many Beatles impersonators and look-alike contests and dolls and statues and paintings and... do you see? I would argue that Elvis was actually a larger phenomenon over a longer period of time. Today kids say \"who were the Beatles\" but they know Elvis. In 1637, [Tulip mania](_URL_0_)." ]	[ "Go ahead and give the topic info. Maybe more important is how it relates to your degree. History is vast, and if you are not in the field it may surprise you how many subjects get covered. History of oysters, hostory of dogs, history of paper... Part of what makes reddit great (and this sub particularly) is that y...
How do touchscreens work?	[ "The only real difference between a touchscreen and regular screen is the glass on top. You can even buy just the glass (called a \"digitizer\" when it's touchscreen) to make a normal screen into a touch screen. Most touchscreens today are \"capacitative\", it's what's on almost all cell phones (Galaxy, iPhone, etc...	[ "_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." ]
How did a siege warfare in feudal Japan playout?	[ "Hey there! I went ahead and stalked through /u/AsiaExpert's comment history for this one - he made an INCREDIBLE summary of this exact question a bit over a year ago. [Here it is!](_URL_0_) I hope that helps you out :)" ]	[ "Can I piggyback on this question to ask how accurate James Clavell's novel Shogun was? I get it was fiction, but it seemed like he tried to convey a great deal of historical accuracy. I read it all of the time, and would be interested to learn what kind of misinformation I am picking up:)" ]
Why is it so easy to fall asleep in uncomfortable conditions like sitting in a chair in class or lying in a hard tanning bed, but usually takes a while in a comfortable bed?	[ "It's because you only try to fall asleep in an uncomfortable condition when you are exhausted, but you are rarely that exausted at the end of the day while relaxing in bed." ]	[ "What you feel is the difference in temperature. When you are in a hot tub, you feel hot, because you are colder than the surrounding water. When you get in a cold pool, you feel cold because you are warmer than the pool water. Similarly, when you have a fever you feel cold because you are relatively warmer compare...
Why can some bald men still grow beards?	[ "Male pattern baldness usually applies to a portion of the scalp. It doesn't affect your facial hair. Genetics does control how the hair on your face grows; some can grow bushy beards and others can only grow a mini-stache." ]	[ "Balisors are less common around airports (where air traffic is tightly controlled) than in the countryside where low-flying planes are likely (if not common) for crop-dusting, police, state natural resource departments. They can also be visible at night, read here: _URL_0_" ]
Why do some languages need to be compiled in order for a computer to run it while others don't?	[ "Computers execute what is known as native code or machine code; lists of numbers that correspond to instructions and memory addresses that are meaningful in their particular architecture. However, machine code is not very natural or productive for humans to work in. Enter programming languages, which are instruct...	[ "Okay. So let's say that you want to bake a cookie just like the ones that grandma makes. You could try to eat her cookie, and then using your knowledge of baking sort of reverse engineer it, but it would be an incredible hassle and very hard to do. But if you had the recipe she used, it would be very easy to figur...

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