Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
If TV commercials have been around for many years, and there's a whole Advertising industry, why are most commercials so awful?	[ "Commercials are expensive to write, film, and produce, and that's before you even think about the cost to air it on TV. Most smaller companies do not have that kind of budget and so they hire bad ad agencies, or worse they try to do it themselves on the cheap. Don't let anyone fool you, advertising is difficult wo...	[ "A quick [PubMed](_URL_0_) search for these drugs brings up a vast amount of peer-reviewed papers, some of which are free even if you are not at a University with access. The short answer is that even though these early compounds were effective, the side effects were astronomical. We've moved towards more specific...
Why were the Americans driven out of Somalia so quickly whereas the Italians were there for years?	[ "Would you mind elaborating? The solidification of Italian control in the Somali regions dates from around 1925, after Cumar Samatars rebellion, and ended in 1941, a period of 16 years. Furthermore, the Americans weren't colonizing, they're were on a peacekeeping mission and you'd have to take that into account." ]	[ "Article III, Section 2 of the US constitution says that states or citizens can sue foreign governments in the US Supreme Court. It's one of the very few cases where the Supreme Court has original jurisdiction. And sure, they could just not show up -- the same way you could choose not to show up if you were sued. B...
How does a normal bar of soap act to clean your hands? As far as I knew it isn't anti-bacterial?	[ "ACTUALLY, there is no evidence that anti-bacterial soap is any more effective than regular soap! _URL_0_" ]	[ "True pretzel making actually requires a lye bath. Lye, however, is harder to acquire and is extremely caustic For that reason most recipes require a baking soda bath, which is far weaker, but gives the same kind of reaction. Both of them are there to give the pretzel its unique outer skin. When the caustic solutio...
Why do beer brewers distribute their product in glass, and not plastic bottles?	[ "Most breweries use glass, or cans, since no oxygen can diffuse trough it. Oxygen is the enemy of fresh beer: stale beer tastes a bit like wet paper..." ]	[ "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...
I have worked with many people with down syndrome, some are so simple they are like a child, others are much more capable. Whats going on in the mind of a down syndrome sufferer? what is it that extra chromosome does to them physically/mentally?	[ "The third 21 chromosome induce an abnormal production of beta-amyloid peptide in the brain. Depending on the individual this augmentation can be small or as much as 50%. That explain the disparity of mental affection" ]	[ "How do we continue to slowly get smaller and smaller architecture in processors? I guess I am trying to understand what limits the shrinking of architexture. Essentially, why cant architexture rapidly decrease in size faster than Moores law predicted? Sorry, if this is a super complicated answer, I just always hav...
How close are we to lab grown meat being a realistic alternative to traditional meat?	[ "Within 5 years hopefully. _URL_2_ _URL_0_ _URL_1_ The cost is following the same curve as that of computers etc. Really quite worrying for farming industry based countries but undoubtedly better from an ethical and environmental standpoint." ]	[ "I'm sorry to have removed this question, but this falls under a poll-type question and is prohibited according to our rules. The problem with questions like these is that they invite speculative answers and the risk is that the thread is going to end up more like an /r/AskReddit thread than a thread we want here."...
Are there any viruses that are beneficial to the host?	[ "There are some interesting examples of mutualistic viruses, as [summarized in this table](_URL_1_). One that I have read about before is the [polydnavirus](_URL_0_), which infects a particular part of the ovaries of parasitic wasps. When these wasps find a caterpillar they inject an egg into it along with many pol...	[ "Define “useful”. If useful takes criteria like economical or efficient into account, then no. Any cutting or destruction the LHC is capable of is done more easily/efficiently by more traditional methods. Do realize, this is a machine that requires insane amounts of energy to operate. The proton beam could penetr...
How does a sleep tracker tracks sleep?	[ "They don't. They measure relative movement, but that's it. I have a pretty serious sleep disorder and have had many sleep studies. If you want to find out if you're getting sufficient quantity and quality sleep, do not rely on your fitness tracker!" ]	[ "In short, chemistry! For a longer answer... There are a lot of standard chemical 'building blocks' and standard methods for attaching them. That's pretty much the nature of chemistry. You can see [three different lab syntheses of melatonin here](_URL_0_). So how do you know that what you've made is actually melato...
Why is socialism used as a pejorative in american (republican) political rethoric?	[ "Because socialism is linked with communism in the eyes of many Americans which we have been conditioned our whole lives to view with poverty and corruption. It also is strongly linked with Europe which tends to bring a whole other bag or animosity to the table. Edit: America is based on the myth* that the governme...	[ "A lot of political commentators are disingenuous. In 2008, it was pretty clear on election eve McCain was done for. More so for Bob Dole in 1996. But if you are say, Rush Limbaugh, and you have a bunch of followers, you will never say \"this one isn't going to be close, might as well stay at home\". You are going ...
Why are teeth made of dentine and enamel and not bone?	[ "Because enamel is much harder than bone. If you had bones for teeth the would break much more often. The down side is how long it takes to form enamel. this is why you have baby teeth. the whole time you have baby teeth your adult teeth are forming their enamel." ]	[ "Where did you get the idea that eating cheese neutralizes cavity forming acids?" ]
How was Xi Jinping able to effectively become dictator of China by doing away with term limits after decades of ten-year limits for presidents?	[ "> dictator of China Not quite. He may be the most powerful man in China, but he's not the only powerful man He largely cemented his power with a massive anti-corruption campaign a few years back. Many of the targets were, conveniently, rivals of his and were eliminated. During his rule, China has experienced a...	[ "I assume by division into two empires you mean the period between AD 395 and AD 476 (or AD 480) when the Empire was ruled by two emperors: one in the East and one in the West. Note that it was still the single empire during that time, not only theoretically but in the practice as well: the same constitutional laws...
Does counting "one-one thousand, two-one thousand..." after seeing a flash of lightning until you hear thunder actually give you a good estimate how far away you are from the flash?	[ "Sound travels 1 mile in 4.7 seconds (or about 1 km in 2.9 seconds). We can round them up to 5 seconds and 3 seconds, responsively. If your counting of \"one-one thousand, two-one thousand...\" is a good approximation of a second (and that's why we add the extra \"one thousand\"; to force a pause in our speech of r...	[ "Imagine you wanted to send a digital file to a friend of yours, but all you have is a telephone and the binary data contents of the file. You tell your friend \"when I say beep you write down 1, when I say boop, you write down 0\", and then you read the contents of the file to him over the phone \"beep beep boop ...
Why are people crypto-mining GPUs?	[ "A GPU is specialized to compute the calculations to render graphics very quickly, better than that a general purpose CPU can. It just so happens those calculations lend themselves to bitcoin mining. Dollar for dollar, GPUs are going to give you more bitcoins." ]	[ "All those computers cost money. AWS sells time on those computers. When paying customers want to use them, the pi folks have to wait. They wanted to announce before March 124 (pi day) and that's how far they got." ]
Dear /r/askscience, is it feasible to write a pc program that would distort your computer screen image in a way that it would correct for poor vision making glasses unnecessary?	[ "Yes. [Many] lenses can be represented as 2D [convolutions](_URL_0_), so what you want to do is to introduce another de-convolution to the image which counters the errors in the convolution inside the user's eyes. There are various caveats and drawbacks, as usual. Here are some quick examples: * [Virtual Glasses: T...	[ "* Your glasses get scratched and dirty over time; and * Your eyes change as you age so your prescription changes. Often people get new glasses after a new optometrist's prescription so, naturally they work better than their old glasses." ]
What exactly does "economic growth" mean?	[ "GDP, which is effectively the same thing as \"how much people are spending.\" GDP measures the total market value of all the goods and services produced within a given geographic area (i.e. a country) within some period of time (e.g. a year or a quarter)." ]	[ "Say you're in class, and good work provides results in jelly beans from the teacher. These are super jelly beans, and you need 10 beans a day to survive. So any amount of 10 beans is luxury. You work hard and you earn 20 beans, but in order to get those beans you used pencils and paper provided to you. Therefore ...
Why is this argument offensive?	[ "It is the \"either/or\" fallacy, or fallacy of false dichotomy, in other words, the argument is offensive because it insults the intelligence of anyone with even a small clue of the complexities of the issues. It is additionally offensive because it is crafted to appeal to the xenophobic nature of people to redu...	[ "If I could pose a follow-up: what about 1943?" ]
How can there be fire underwater?	[ "Often we say that three things are needed for a fire: fuel, oxygen, and ignition. This is called the \"fire triangle.\" If you have all three things then you can have a fire. Most fires will be put out when you add water--this typically removes two things from the triangle: ignition (heat) and oxygen. However, som...	[ "He simply burnt (\"detonated\") benzene with oxygen in an [eudiometer](_URL_1_), noting the change in volume and understanding that the hydrogen present reacted to form water. [Here's a link to his paper discussing the discovery](_URL_0_). He talks about the determination of benzene's chemical makeup on pages 449 ...
Why do we chew our finger nails when we get nervous?	[ "Mammals have a strong oral fixation, which is a result of a survival instinct from birth (suckling). When animals are stressed, they often revert to primitive or early responses. In this case, humans are seeking comfort by combining the suckling action with the comfort of chewing food, with a side order of self-ab...	[ "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 they make "seedless" grapes?	[ "And without seeds, how do they further breed?" ]	[ "To piggyback on this. I've always wondered if it all goes through some type of decontamination process of some sort....?" ]
How powerful is the AMD Jaguar cpu for the PS4?	[ "along with the other users comments, also keep in mind that the ps4 has more headroom. on a pc, the cpu has to manage the OS and lots of other things running while ALSO playing a game. on a console all it has to worry about is the game and the XMB." ]	[ "My thoughts are because it is supposed to be a game changer(literally) and to release anything sub par could potentially hurt the concept and make it take even longer for people to get interested in it again, I for one would be extremely disappointed if it was clunky and didn't work as good as I'm imagining it wil...
Why Are Some Motorcycles So Loud?	[ "I ride a fairly quiet BMW, this might help non-riders understand a bit of the revving. & #x200B; Motorcycles have standard transmissions that require you to feather the clutch and throttle while at slow speeds to maintain speed and balance. It sounds like you're revving the engine just to make noise but that's no...	[ "To get your attention. Although a law was passed a while ago regarding this topic. _URL_0_" ]
Why do most smartphones not have built-in FM receivers? (When they have many other technologies like WiFi, GPS, 4G, etc.)	[ "It completely depends on the market. In India and China it's an important feature so manufacturers go out of their way to include it as consumers look for it. In North America, it has so little interest that we've seen some manufacturers disable it because it's cheaper not to test/support than it is to deliver it....	[ "Others have already given good answers, so I'll just suggest that you study Fourier Series. A Fourier series is a way of breaking down any wavefunction as a sum of sines and cosines. It takes an infinite sum to get perfect precision, but it is easy to get to the point where a human ear cannot tell the differenc...
Can someone clarify what Dark Matter is supposed to be?	[ "So by the very oldest definition, we thought that dark matter had to be stuff that gives off very little (possibly zero) light. This could be either normal matter that is just very dark, or non-normal matter that doesn't interact in the EM spectrum. These days, we think the vast majority of the dark matter is the ...	[ "Jacques Piccard, a member of the first team to descend to the [Challenger Deep](_URL_0_), which is the deepest known point in the ocean, made the following description: \"The bottom appeared light and clear, a waste of snuff-colored ooze. We were landing on a nice, flat bottom of firm diatomaceous ooze.\" Here i...
Does a popcorn kernel have the same nutrients as a piece of popcorn?	[ "I would assume the nutrition to be similar. I know that when vegetables are boiled, fried, or baked they lose nutritional value because the heat alters the chemical composition. The same nutrients are still present, but not in the same quantity. Since popcorn is a starch, I assume some changes occur under heat, bu...	[ "Hi there! It seems that this is a moderately popular question, and so you might look at [this thread](_URL_1_) and [this one](_URL_0_) that seem to address a part of your question. Of course, that is not to discourage the hope that an expert will show up here and a little more to the discussion." ]
Are mental illnesses (depression, bipolar, schizophrenia) curable?	[ "Mental health is super complicated and difficult to measure with the same level of objectivity as other physiological diseases. Moreover, the complexity of experiential impacts on things like one's general mental state make it a real challenge to conclusively determine a great deal of the prognosis for mental issu...	[ "Reading that page hurt my head so very very much. There is so much shit and garbage on that page it is ridiculous. No, these people are completely nuts. And for any of the points they did make that are valid - experiments performed after the results they discuss have disproven the original results - or the origi...
How did dinosaurs have sex?	[ "Add-on question to this: At a glance I want to say that just looking at the mating habits of extant large lizards or crocodilians would give you a very good idea; however given birds are the only living direct descendants (of theropods at least) and some have very different sexual organs in the form of cloaca, I'm...	[ "Probably something like this - ^rumble rumble RUMBLERUMBLERUMBLECRASHSMASH Screams Oh god why, save us Or at least I assume so." ]
How exactly does a power strip work?	[ "The outlets in a power strip are wired up in parallel. As you plug more items in the load does increase. Most power strips have a circuit breaker on them that will trip if you exceed the load, if not your outlet should have a circuit breaker as well. It is entirely possible to overload a power strip, it is just m...	[ "High coercivity vs. low coercivity. You're never going to need to re-write the information on the magnetic stripe of your credit card, so its stripe has high coercivity. That means it took a lot of energy to produce, but will take a lot of energy to erase. Hotel keys need to be re-written almost daily, so their st...
What happens to the energy used in a Air Conditioner?	[ "The energy is expelled as heat. Air conditioners essentially move heat from inside a building to outside, and the heat released outside is more than the heat absorbed, because some of it is heat from the energy used to run the air conditioner." ]	[ "They sell it back by measuring the flow thru their electric meter, the electric company pays the market rate for the electricity you provide back." ]
If a species has sexual dimorphism, does that mean it can never be in Hardy-Weinberg Equilibrium?	[ "It's not really about that. It's not an equilibrium you are supposed to look at real animals and find or not find. It's about what the baseline would be if literally no other factors existed. It's that people discovered dominant and recessive genes and wanted to figure out what that meant, since the idea was tha...	[ "A couple of archived threads contain a lot of good information. From February 2014, [this one here](_URL_6_) has a top-level comment about medieval Europe and a lot of further information in the comments below. And then [this one](_URL_5_) covers Rome, South American cultures, China, Japan, ancient Greece, and anc...
Why does satin feel cold compared to cotton?	[ "They have a higher heat conductivity. This means that they are able to remove heat from your hand faster than wool can, making your hand feel warm. In other words, wool is a better insulator, so it is not as good at removing heat from your hand. It's the same reason why room temperature metal feels colder to the t...	[ "\"One of the most common ingredients used was dihydrogenated tallow dimethyl ammonium chloride (DHTDMAC), which belongs to a class of materials known as quaternary ammonium compounds, or quats. This kind of ingredient is useful because part of the molecule has a positive charge that attracts and binds it to negati...
Why is widespread use of antibiotics breeding antibiotic-resistant bacteria, but widespread use of refrigerators isn't breeding cold-resistant bacteria?	[ "Cold doesn't kill the bacteria. Chemical reactions generally occur much more slowly in colder temperatures, and this includes the reactions that bacteria run to generate energy to reproduce and make toxins. Your fridge basically just slows down machinery of bacteria so that food that would normally spoil in a day ...	[ "Air conditioning is based on the principle that the temperature of a gas is related to its pressure. If you compress a gas it increase in temperature and when it expands it cools down to its original temperature. So the cycle of an air conditioner is that it use a compressor to get high pressure high temperature g...
What were fetishes like in antiquity? What were commoners "into" compared to today? [nsfw?]	[ "I actually did a project for my high school Latin class on sexuality in Ancient Rome. I don't know if this is what you're looking for, but the Roman men preferred masturbation with the left hand. Most awkward and hilarious (to me) presentation I've ever given. \"I'll start with the topic I know most about - mastu...	[ "Is this a homework question? It says in our [rules](_URL_2_): 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...
What is in gasoline that makes cars go and why can’t we make artificial gasoline?	[ "We can and do make artificial gasoline. For example it can be made from coal. But you have to start with some sort of fuel: a hydrocarbon molecule that will give off heat when it combines with oxygen (which we call burning)." ]	[ "You have a lemonade stand. You sell it for 50 cents a cup. One day you find out it's going to be very hot outside and people are going to want more lemonade. You figure you can get away with selling it for a little more since the demand is there. So you start charging 80 cents. You notice that the number of people...
How does anesthesia work without killing you?	[ "Anesthesia doesn't necessarily \"shut the body down\". By definition, anesthesia consists of 4 parts. Amnesia (not remembering surgery), akinesis (not moving), analgesia (not feeling pain), and unconsciousness. These 4 parts are accomplished by various drugs. Volatile anesthetic agents, like isoflorane, provide al...	[ "When you sleep you go through different stages dictated by what are called alpha and theta waves. Being in certain stages of sleep will result in different levels of awareness upon waking up. I don’t remember what stages dictate what, but some involve not even being aware that you were asleep at all, and others in...
Can spectral flux density be negative?	[ "The Stokes V parameter is negative if the circular polarization is left-handed. It is not a measure of intensity. See the examples [here](_URL_0_)." ]	[ "I haven't had to derive it since my undergrad, but if memory serves, it is obtained from the Schwarz inequality. After doing some maths, you basically get that, for two operators, the product of their uncertainties is greater than or equal to (half?) the expectation value of the commutator of the the two operators...
How do cross-eyed people focus on something to see it properly?	[ "Typically someone who is strabismic (crossed eyed) sees double early in life but the brain and visual system are incredible. They will do whatever needs to be done to insure that you see to the best of your ability. It does this in several ways. One way is suppression- your brain will only receive information from...	[ "Simply because your brain adapted to the motion and so it has to adapt to not moving again. It takes about a week for the brain to learn to adapt to the motion and non motion at the same time. Source: used to work in a factory staring at a sideways-moving conveyer belt and would be dizzy for the rest of the day. ...
How did other nations, particularly the Soviet Union, react to the Civil Rights movement of the 1960s in the United States?	[ "A historian named Mary Dudziak wrote a good book on this subject: [Cold War Civil Rights](_URL_1_). In it, she shows how the Soviets exploited the African American freedom struggle as a key propaganda moment: i.e. \"look how the 'land of the free' denies freedom to their lower class.\" This was particularly impor...	[ "This question is getting a lot of traffic after being [tweeted by @reddit](_URL_5_), so I thought I'd welcome those of you that haven't visited /r/AskHistorians before to the subreddit. Please do bear in mind that in order to keep the quality of answers here high we have [strict rules on comments](/r/AskHistorians...
When choking someone out with an arm hold; how thin is the line between turning them unconscious and killing them?	[ "Choke holds are really dangerous, and are not something you should do casually. There's a risk of killing someone unintentionally, even if they never lose consciousness -- see the death of Eric Garner, for example." ]	[ "The movie was [Days of Thunder](_URL_0_) and he was talking about [Slipstreaming or Drafting](_URL_1_). As to your question, this depends on * The velocity of the cars * Geometry of both cars * Atmosphere status (temperature, rain, snow ... although they have very little effect at higher speeds) On the street it's...
Why will you die if your body temperature drops below a measly 20 degrees Centigrade?	[ "Severe hypothermia can occur at a core body temperature 20 of degrees Celsius, while mild hypothermia can occur at temperatures as high as 35 degrees Celsius. Having a temperature that low causes a severe slow down of metabolism, among other things. Many chemical reactions and organ systems require a fairly warm t...	[ "The temperature sensors in your skin can only detect relative changes in temperature. Not absolute temperature. You can show this by doing a simple experiment with three cups of water. one cup of ice water, one cup of room temperature water, and one cup of hot water. Place a finger of your right hand in the ice w...
Why can't I breathe in when a gust of fast wind hits my face? For example, while in an open windowed and fast car or bus	[ "As the OP have mentioned in a comment above, fast moving fluids, in this case air, have lower pressure. Animals breath by expanding the chest cavity which causes the pressure surrounding the lung to lower. This causes the higher pressure outside air to rush in and inflate the lung. But if the pressure outside sudd...	[ "The urge to swallow comes when the food is mashed into a sort of runny paste that can very easily be swallowed. Try chewing up a piece of bread, but then use your tongue to mash it back into a single big mass, you'll probably notice an urge to chew it up again before swallowing. Also, try eating some really dry fo...
How does the body initially identify pathogenic bacteria?	[ "One of the ways is that pathogens often have some similar molecules like LPS that can be identified by receptors on sentinel immune cells. These are called PAMPs (Pathogen Associated Molecular Patterns). We have developed a number of receptors built to recognize a variety of PAMPs, they're called PRRs (Pattern Rec...	[ "There's a database which has a big list of what malicious code looks like. It goes through that to see if there's any malicious code in the file." ]
What is actually happening when I lose my voice?	[ "Your larynx is inflamed, imagine your voice box is a bunch of folded flower petals. Normally thin. They vibrate to produce sound. When they're inflamed and larger than normal, they can't make the same sounds." ]	[ "Imagine you buy a shiny new toy. It costs $20. A week later, you want to sell it to a friend, but that friend will only pay $15 because he knows he could have a new one for $20. You decide not to sell. A year later, the toy has gone out of fashion. Now, your friend will only pay $5 for it. It's in similar conditio...
How can a black hole's singularity be a "point", wouldn't that violate the pauli exclusion principle?	[ "/u/rantonels has covered the problem with the singularity part of the question but there are other problems too: 1) Any calculations in GR are purely classical so any (anti) commutation relations between fields aren't taken into account and therefore no PEP 2) The Pauli exclusion principle is about states not posi...	[ "The equations of motion for the EM field, Maxwell's equations, are linear. This means that if you sum sources (charge distributions) you get the sum of the fields (superposition principle). However, if you allow the charge themselves to be moved by the EM field (according to the Lorentz force equation), the couple...
Why does the United States have such a weak mental health care system and a general stigma against it?	[ "In the 1960's we came to realize that our mental institutions were generally terrible places full of misery and torment for the patients. We started closing these places down in an act that was seen as merciful for the patients. Unfortunately, plans to replace all these institutions with quality care facilities ...	[ "There's a gigantic backlog of applications to process. Our laws are confusing to say the least. We don't have nearly enough people working on it, and the ones we do have are under-funded. And we change the rules a lot. so anyone who applied has to be able to account for that difference, making it take even longer....
Why does a pot of hot water produce more steam right after I turn off the heat?	[ "The steam is just more visible. While actively boiling you are creating a lot of water vapor that is rapidly rising and moving away from the surface of the water. Holding your hand above will feel very hot and moving quickly. As soon as you remove the heat you stop the vigorous vapor production and the air above t...	[ "You need the heat from the boiling to cook the starch/flour which is an ingredient of the pasta. Try this at home. Take some flour and mix it with cold water. do the same with boiling water. you'll notice the difference. only by cooking the pasta gets soft but still sticks together." ]
Why was the Titanic thought to be unsinkable?	[ "Check out these other answers while you're waiting: [Why was the Titanic considered “unsinkable?”](_URL_0_) by /u/PainInTheAssInternet [Was the Titanic really called unsinkable?](_URL_1_) by /u/hatheaded, which has a link to an article on the topic" ]	[ "You mean the Animal Planet one? Hype and marketing. Then it became a euphemism for menstruation (I'll fill you in if you want, but it's gross sex stuff...) and took on a life of its own." ]
Why does tupperware get those weird white spots? Once the spots appear, is it still safe to use?	[ "It is unlikely that it is a chemical change. Tupperware is made from mixtures of polyethylene and polypropylene, which inert to most conditions that you could make in your kitchen. However, you may know that if you heat Tupperware, that it becomes softer, and at highly elevated temperatures, may melt. What is most...	[ "Yes, definitely! A few years ago a few of my lab mates and I did a study on what bacteria lived on ourselves and various things around our lab. The place with the most bacteria and diversity was on my Nalgene water bottle! I wrote up an article describing what we did and how we used DNA sequencing to identify the ...
Can someone explain the Cold War as if they were talking to an idiotic 5 year old?	[ "You might want to try r/ELI5... seems appropriate." ]	[ "Alrighty guys, because I've already had to remove ten comments similar to this, I'm going to leave a top-level mod post here. Please remember when posting here that this is not /r/Politics. We are not interested in contemporary politics, your opinions on current policies of countries, two word answers, one line an...
If I drink soda, do I need to drink additional water to balance it out?	[ "This concept probably came from the idea of caffeine being a diuretic, or a compound that increases urine formation and output in the body. More recently, however, it seems like this has been disproved, with experiments showing that caffeine really has no major impact on fluid levels. [[1]](_URL_0_) [[2]](_URL_1_...	[ "Its the way they it was developed and tested. They made sample A and fizzed it up and it tasted like crap. They did the same with b-x. But damn Y tastes good. Lets mass produce Y. No point in testing what your drink tastes like 1-2 hours after opening as that is not what your target market is buying it for. They w...
If the forth dimension is time, what is a tesseract?	[ "A cube that exists in four spatial dimensions. OUR fourth dimension is time. A tesseract can only exist in a universe with four or more spatial dimensions. Kind of like how, if the universe were a flat plane and we had time, we could not have a cube." ]	[ "ELI5 version (Using Power Rangers): Primary: The smaller parts that make up the zord (i.e. ball bearings, connecting rods, etc.) Secondary: The specific structures of the Zord (i.e. arm + leg = alpha helices, torso = beta sheet) Tertiary: Zord Quaternary: Megazord p.s. in case you didn't know the zords are their ...
Is cold water more effective at exstinguishing fires than hot water?	[ "Water mainly puts out fire by absorbing energy. The heat of vaporization of water is about 2,260 kJ/kg. The specific heat is 4.2kJ/kg. So the heat energy absorbed by evaporation is the same as a temperature rise of 535 Celcius. So the difference between cold and hot water will always be much less than the evapora...	[ "> Also, it is necessary to know that sunburn is a long term effect and that it does not immediately surface on the skin. So the belief that if the skin feels cool immediately after a dip in the sea, it will not sunburn is again a false belief. This is a false belief considering the fact that sunburn is a continuin...
Why doesn’t grass grow in winter?	[ "It still grows if it’s not completely covered by snow throughout winter. I live in the PNW and I’ve been tempted every year to cut my grass because it gets too long during winter. I just don’t do it because the soil is so saturated with moisture I would just end up making a muddy mess." ]	[ "For the same reason that soda pop tastes different after a freeze/thaw cycle...the carbonation is gone." ]
Why do we put people in prison who don't pay their taxes?	[ "For the most part, we don't. Criminal tax evasion requires intent. This usually occurs when there is some other crime involved, and the income from that crime is intentionally hidden (like Al Capone). It also sometimes occurs when the person is a serial tax evader, and intentionally hides income (like Wesley Snipe...	[ "Well, if it were hypothetically possible... Say goodbye to roads, fire departments, police, schools...." ]
Why doesn't the queen have a last name?	[ "They do, it's usually very long and combines all the lineages of incest. Lets take Queen Elizabeth II. In 1917 they have changed their surname from Saxe-Coburg-Gotha to Windsor. so her full name is Elizabeth Alexandra Mary Windsor" ]	[ "There is a fear, founded or not, that the government will require specific actions or information in order to provided service. Example: \"Oh, you want kidney stone procedure done? Sure, but first we need to see all of your grocery store receipts to see if your diet is causing the problem\" or \"Yes, we will be ha...
What does the data that is collected and creates your personal online profile actually look like? Is it just code? What are the main peices?	[ "I mean, if a human wanted to take a look at that data it would probably best be viewed in spreadsheet software. If it were human-accessible certain information like names and cc numbers wouldn't show up/would be encoded or otherwise inaccessible but there would be metrics like, say, your activity on the site, that...	[ "Because taxes are complicated, and not all taxes relate to \"commerce\". For example, you pay taxes based on how much you make. But if you do something like donate to charity you have to pay less taxes. If you have an additional child you may end up paying less in taxes. If you get divorced you may have to pay les...
Why does my cat eat salsa if onions/ garlic powder will poison him? Shouldn't he have evolved to know better?	[ "Cat's didn't evolve in an environment with salsa in it. How would they evolve an aversion to something that didn't even exist until very recently?" ]	[ "[Scoville Heat Scale explained with DBZ!](_URL_0_) Dairy products (e.g. Milk, Yogurt etc.) contain a substance called \"casein\", which has a detergent effect on the chile's capsaicin. CAPSAICIN is the substance in chile peppers that gives them their spiciness." ]
does fiber optic cable require less electricity to push data across a given distance?	[ "I would really like to hear an educated answer too, but in lieu of that... Fiberoptic cable transmits data using pulses of light, as opposed to electrical pulses on standard wires. As such, they can only be used to send signals, not as power lines, and each end of the cable needs a special light sensor/emitter to...	[ "If you are looking at it from an emissions or energy standpoint then yes. [This](_URL_0_) Peta site is a good source of info, such as \"It takes more than 11 times as much fossil fuel to make one calorie from animal protein as it does to make one calorie from plant protein.\" Interesting information on burger prod...
How does my car know when I am drifting into the other lane, especially when the lanes shift due to construction	[ "My lorry does this. There are sensors under your car that know when you stray over a series of lines or cats eyes. My lorry beeps like crazy if I change lanes without indicating first as it thinks I'm falling asleep and drifting across lanes." ]	[ "Google Android has a feature that sends location data to the google servers, even if you have GPS turned off. If you use a Google Android phone, you can actually view your own data if login to Google and goto this site: _URL_0_ What Google is doing is fetching all this data that is sent from all the Google Android...
If high temperature rock essentially condenses into glass, why is the surface of the earth made of rock not glass?	[ "Igneous rocks are divided into two groups: volcanic (or extrusive) and plutonic (or intrusive). There are examples of rocks made of glass, e.g. obsidian. These are volcanic rocks that are formed when lava is quenched rapidly; in fact, too rapidly for crystals to form into an orderly lattice structure. But plutonic...	[ "Because enamel is much harder than bone. If you had bones for teeth the would break much more often. The down side is how long it takes to form enamel. this is why you have baby teeth. the whole time you have baby teeth your adult teeth are forming their enamel." ]
If Spotify and Apple Music generate so little money for musicians, why do so many of them participate in it? Even with the loss from piracy, surely it would be better for Taylor Swift or Moby or AC/DC to just take in the money from regular sales as they did before.	[ "Little money is better than no money, and that's really what the answer is, if you don't provide your stuff on the common networks people will just pirate. You make more by just selling everywhere that is willing to take you, take whatever money you get. In the end, most of the money is really coming from tours an...	[ "Traditionally, it was very very difficult for an author to publish their book and get it sold in stores. The logistics involved in getting a printer, getting stores to buy that book, having that book shipped to stores, having the book advertised, were so complicated that it just made sense for authors to get throu...
What's with (what seems like) the sudden increase of gluten free foods, restaurants, diets, etc.?	[ "There are a few people with Celiac Disease, for whom a gluten-free diet is medically necessary. Beyond that, it's just a fad. Companies advertise products as gluten-free (gluten-free water!, gluten-free tupperware!) in order to make money. It's of no benefit if you don't have the disease." ]	[ "This particular technology is called AJAX, which is more of a set-method-of-doing-things which evolved overtime. Basically it's a series of function calls that allow a Javascript script running on your browser to make a call to a website and get new information. AJAX has been around for a while, with Microsoft add...
What do you catabolize first during starvation: muscle, fat, or both in equal measure?	[ "Gluconeogenesis highly prioritizes fat metabolism for energy when carbohydrate based sources of glucose are low/empty. The entire purpose of fat is to be an energy source when other sources are low, whereas the purpose of muscles are either locomotion or stability. It would be hard to imagine evolution leaving you...	[ "If you don't like spending more money than you have to, you'll only buy a car big enough for your needs. A bigger car is more expensive, and uses a lot more gasoline than a little car. You wouldn't buy a big SUV if you didn't need it. Lean muscle mass burns energy - it's expensive for our bodies to build it, and k...
How hard is it to violate another country's airspace?	[ "It's pretty easy. If you don't pay attention to where you're going, any pilot, military or civilian, can accidentally cross a border they didn't mean to. It's like accidentally drifting out of your lane while driving. You didn't mean to cross into another lane, you just didn't pay close attention and accidentally ...	[ "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 /...
I'm confused about the whole concept of Effective Altruism. Please give examples!	[ "It's about getting the most bang for your buck. Which sounds a bit callous when put like that, but it's essentially true. It's about using logic, evidence, and reasoning to figure out where your money will do the most good. For example, lets say you want to help the homeless. You have $1000 floating around that yo...	[ "because much of your tax situation involved information that the govt and your employer do not have. Things like charitable contributions and other tax deductions, tax credits for things like using green energy, income from investments and savings." ]
How much blame could we actually give to Herbert Hoover for the Great Depression?	[ "Hoover had, in my opinion, little to do with the actual ONSET of the Depression and merely suffered the wrath of the fact that people need to blame...someone. And you can blame the President, while you cannot blame faceless brokers at the NYSE. An unregulated and unmonitored Stock Exchange, which had been doing......	[ "Follow up question. Is Goebbels largely responsible for the prevalence of the \"Clean Wehrmacht Myth\" present in modern day society or was that born out of something else entirely?" ]
Hey Askscience, I was wondering if Wireless Power (electricity) is possible?	[ "Yes, it is called inductive power transmission. Basically, a current is run through a coil of wire; this creates a magnetic field, which in turn induces a current in a second coil of wire when that second coil is in proximity to the first. There are already products that use this technology, like for recharging su...	[ "For that you need mountains, with two lakes above each other, and a river to replenish the evaporated water. Most, if not all suitable sites are already used for that. *Construction is expensive, and the energy content is relatively low. As a theoretical exercise you can calculate the 'lake' sizes and heigh...
If nothing can travel faster than light, what exactly is preventing it from escaping when traveling beyond the event horizon of a black hole?	[ "Light is not being pulled in by something that is moving. Light is following certain paths in a curved space-time geometry, and all of those paths are constrained to stay within the event horizon." ]	[ "> the rod is as strong as theoretically possible This still isn't strong enough. The force required to keep the end of the rod attached grows to infinity as the speed of the tip approaches c. There are a number of ways to think about this. The end of the rod becomes infinitely heavy due to relativistic mass. The...
What does holding your breathe actually do to your body?	[ "Breathing is triggered by CO2 build-up in your blood. Breathing expels that CO2. If you hold your breath, the CO2 builds up in your blood and biological alarm bells start going off, urging you to breathe. As you no doubt know, resisting that urge is extremely uncomfortable if you let it go on too long. Oddly enoug...	[ "Good question. I hope you get an answer from someone who knows. It is an amazing stress reliever and always a surprise when it happens. There is a special connection you have with people with whom it happens often. It seems a very human experience." ]
How are international treaties "binding?"	[ "They can't be enforced, they depend on the good faith of both parties. If course of you renege on your obligations under a treaty you agreed to, then you will find it difficult to get anyone to trust your word again." ]	[ "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...
When you copy a file to clipboard and then paste it to a different location, what is exactly happening?	[ "When you copy a file to the clipboard, the computer fills the clipboard with the path to that file on the filesystem and a tag that indicates that it's a reference to the file (rather than just the text like you would get if you copied that text out of a text file that happened to contain it). When you paste it, t...	[ "Imagine country A has laws that are intended to encourage new businesses, and so the laws there make is hard for old businesses to claim \"Hey we did that first!\" or \"Hey, that almost the same as what we do!\" Suppose country B has laws that are meant to protect that country's companies, and stop cheap-o foreign...
Have we tried performing the double slit experiment using a wavelength sensor in one of the slits?	[ "The spirit of your question is correct. It is possible to make certain measurements of quantum systems without collapsing the wavefunction. They're called [weak measurements](_URL_0_). The idea is that you get very little information from each measurement, but by taking millions of measurements you can build up ...	[ "Possible? Sure. You can build computers out of pretty much anything. Here's an [adder made from wood and marbles](_URL_2_). Here's an [hydraulic computer](_URL_1_). Here are some [pneumatic logic gates](_URL_0_). The question is whether a different way of doing it will be in any way an improvement, because silicon...
Why does the act of accelerating air cause a cooling effect?	[ "You sweat. Moving lots of air past your skin will carry away moisture and bring in new air to absorb moisture. Even for things that do not sweat (like machinery), the hot air it is producing is being carried somewhere else and new, cooler air is being introduced. The distinction between bulk motion and the random ...	[ "I can only talk about this on an anatomical level, but our ears aren't designed to pick up every sound around us. When a sound registers in our inner ear, it activates one of 24(?) or so critical bands, which vacillate in the general area that the sound occurs. Because there are a limited number of critical bands,...
Is there any test that can without a shadow of a doubt give exact age of a human?	[ "No. During development, there are certain milestones that can give an estimate of human age, i.e. the [metopic suture in an infants skull closes between 3 and 9mo](_URL_1_), [dental development and/or wear](_URL_3_), [lengths of long bones](_URL_4_), [indicators of puberty](_URL_2_), changes to skin elasticity, dr...	[ "We have a pretty stong understanding of anatomy and cellular biology. Its not a big guess we just actually know what we are made up of... We gained that knowledge through centuries of medical science, chemistry and biology. So put more bluntly, we measured it." ]
Why is "Memory" required in graphics cards when you already have RAM?	[ "Instead of sending the data to the CPU to calculate and having the CPU send the data back to the graphics card to display, it does all of its own calculations. It's faster to do calculation on your own computer than to send the data to Japan, have them crunch the numbers and send them back to you, right? Same idea...	[ "I think you mean most movies, only like 1/4 are 4K today. 99% of tv is either 720p or 1080i as well. > Keep in mind, this was a 300m dollar production by James Cameron, known for using the most high-end gear to achieve the best images, so this was a conscious choice. 4K movies didn't exist until 2011, so it w...
How much do we know about hair? Is it really possible to cream some chemicals on it (shampoo and conditioner) and repair it?	[ "[Please search the subreddit before submitting a question.](_URL_0_)" ]	[ "Several things. On an installation level, each program you install adds 'weight' to the operating system by giving it more tasks. These aren't always removed cleanly when you uninstall, which makes it important to reimage your computer about every year. Additionally, if you use a standard hard disk drive, the driv...
What happens in your body when you’ve been constipated for days?	[ "It's [not good](_URL_1_). Poop is where everything your body doesn't want goes. If your intestines are packed too full of shit, they'll begin to rupture and leak poop into your blood stream which is life-threateningly-bad. If you haven't shit in a couple of days, drink some coffee until you do. If you're lactose...	[ "From [WebMD](_URL_0_), it looks like soluble fiber makes your stool softer by allowing it to retain more water in the GI tract. Softer stool is easier to pass." ]
Why are fire hydrants In the US above the ground?	[ "This is just opinion, from a (rather new) volunteer firefighter. Hydrants were once called \"plugs\", because the firemain was originally a system of underground pipes made of wooden logs. Firefighters dug down and drilled into them to get water. I, for one, am glad that we've moved beyond having to dig for hydran...	[ "Laws usually don't have to make sense. It is what the politicians and the lobbyists can make the people think are concerns." ]
Why are there many gpu manufacturers (zotac, Asus, msi...) but onlz 2 pc CPU manufacturers?	[ "They're graphics card manufacturers, not GPU manufacturers. For the GPU the two largest manufacturers are nVidia and AMD, it's pretty much like with CPU's. They develop and create the GPU. Third party graphics card manufacturers can then make a deal with Nvidia to use their GPU. The GPU design can't be changed, b...	[ "Generally, drugs taken orally act on the body systemically, that is they are absorbed and distributed in our blood, throughout our whole body. They are then delivered to the site of action, for painkillers usually within the CNS or PNS. They don't just know where you hurt and then go there. Depending on the drug,...
How Alcohol and Tabacco escaped the War on Drugs? And if alcohol prohibtion failed so spectacularly, how can the War on Drugs hope to succeed?	[ "what would you consider success? The war on drugs is never going to lower the amount of drugs to 0. Unfortunately the war on drugs is fighting against itself so that the more that is taken off the streets, the more valuable the remaining drugs become. An increase in the value of drugs increases the incentive to s...	[ "How about the tomato? Where would southern Italian cooking be without it? Szechuan cooking would be VERY different without chili peppers Corn? Tobacco? I understand that I'm ignoring part of your question, but many new world crops were immediately more popular than the potato. It took a while for the potato to cat...
If the 10 yr. treasury goes "up" to 3%, does that mean the price on outstanding treasuries has gone down, or does it mean new issues will have a higher rate, or both?	[ "It means both. New ones will have a 3% interest rate. Ones that have, say 2.5%, would drop in price on secondary market such that the effective rate is 3%. So let's say that the bond sold for $10,000 with 2.5% rate. Now, in order to match the 3% effective rate it would only sell for $8333 if the original buyer wan...	[ "Wet things usually have a higher heat transfer coefficient then the dry version. Also their heat capacity generally increases so it takes more heat to raise their temperature. For a coin, it will feel wet at first while it sucks the heat out of your skin quickly (metal is a bad insulator), but gradually its temper...
When ISIS demands 2 million dollars, why can't Japan pay fake money or wire 2 million and then pull it back once hostages are released?	[ "\"Hello, I'd like to dispute a charge on my credit card.\" \"Okay, sir. What was the amount of the charge?\" \"Two million dollars.\" As others have said, electronic transactions are not acceptable for precisely this reason. Even cash might not be acceptable because it can to an extent be tracked, but the ease of ...	[ "Say you're in class, and good work provides results in jelly beans from the teacher. These are super jelly beans, and you need 10 beans a day to survive. So any amount of 10 beans is luxury. You work hard and you earn 20 beans, but in order to get those beans you used pencils and paper provided to you. Therefore ...
Is there a prediction of when Yellowstone will erupt and, when it does, how will its eruption change the Earth?	[ "Could we trigger an eruption at Yellowstone if we wanted to? e.g. Set off an underground nuclear bomb at Yellowstone." ]	[ "There's a star in our galaxy (precisely in the Orion constellation) called [Betelgeuse](_URL_1_). Why is Betelgeuse interesting? It's a red giant. A red giant about to go supernova. Or rather, a red giant that appears on the verge to go supernova. So were we to have a snapshot of how Betelgeuse looks today -- i...
How do sharks sense/smell blood in the water so quickly and efficiently?	[ "Smelling is a shark's primary sense. Their nostrils are on the outside of their body, and they only use them for smelling not breathing. Water continuously flows through a sharks nostrils interacting with highly sensitive membranes that feed information to the shark's brain. This information allows a shark to pinp...	[ "They don't. It's a marketing ~~lie~~ gimmick. I used to work for a company that did a similar thing by mail. New customers were supposed to sign up by a certain time for special rates but as a specific matter of policy we'd give those rates to anyone who mailed back the special offer." ]
Every country in Southeast Asia has a very established and very old Chinese minority. But how did these communities come about?	[ "Another example raised by the noted scholar of Chinese Indonesians, Charles Coppel is he compares Chinese in Indonesia to Germans settlers in Eastern Europe. \"In sociological terms, the relationship of Chinese settlers in Indonesia to their host societies is more akin to that of the German settlers in Eastern Eur...	[ "Those are more guidelines derived from sanitary rules/taste. Chicken can be eaten raw, but you risk salmonella infection; beef would probably have consistency of a brick if you deep fry it and so on. Stir-fried fish exists though, don't know why you thought it doesn't, Chinese cuisine stir-fries just about everyt...
why 18 is the age of adulthood in most countries	[ "Depends what you mean, the four main areas that people talk about when they say “age of adulthood” are drinking, driving, taxation, and consent. And those range from 16-21 depending where you are (probably further tbh). There is no magic rule, its just a general consensus among law makers in an area of what age ca...	[ "This CGP Grey video does a really good job of explaining it all. _URL_3_" ]
How do cell towers send unique data streams to thousands of phones simultaneously?	[ "You can have more than one radio station or terrestrial television signal. Same principle applies to mobile phones. Here is an overview of GSM: * FDMA: frequency division multiple access: phone A talks with the tower on a different frequency than phone B, one frequency slot has a bandwidth of 200khz * TDMA: time d...	[ "They don't. It's a marketing ~~lie~~ gimmick. I used to work for a company that did a similar thing by mail. New customers were supposed to sign up by a certain time for special rates but as a specific matter of policy we'd give those rates to anyone who mailed back the special offer." ]
Why does the same video have different size for formats?	[ "Some formats compress better then others. The encoder needs also to consider that the device decoding might not be super speedy at the task. Reducing compression can ensure good performance on older devices at the expense of data." ]	[ "When you take a pill it's not 100% the labeled medication. There are other ingredients that help it do its job and release when and how it is supposed to. Sometimes a medicine needs more extra ingredients to do its job so you end up with a bigger pill." ]
Why are headaches and toothaches much less tolerable other kinds of body pain?	[ "As far as teeth go, it's that teeth nerves are hardly shielded at all from debris and other shit. Cavities are basically tunnels leading to nerve endings. If we had our nerve endings exposed in such a way, it would also hurt quite badly. The equivalent of a cavity would be for someone to stab a hole in your skin,...	[ "So the only way that the process of childbirth would change is through evolution of some kind. The only way evolution happens is if the genetically superior reproduce and those who aren’t die. Theoretically if there was a woman who could go through childbirth totally painlessly and she passed that trait on to her ...
How is the highest point of a mountain measured?	[ "Well now we can use GPS satellites and other satellite mapping tools like synthetic aperture radar, but before that, we used a lot of trigonometry. To measure the height of a mountain, surveyors used a method called triangulation. Observers examined the peak from several points. Knowing the distance from the point...	[ "Thee same way airplanes do. They have a probe with a hole in the front of it. Air is forced into it by the movement of the helicopter or plane that pressure is read as airspeed" ]
How do things that magnify one's vision work for hawks?	[ "So their vision isn't actually magnified. Their acuity is just super amazing. So what is acuity? Acuity is basically the resolution of the image. Hawks have a huge acuity compared to humans because they have a much larger concentration of photoreceptors on the retina and they have less integration of the photo...	[ "For myopia (nearsightedness), there's nothing we can say definitively. But researchers have found a [correlation between myopia and time spent indoors.](_URL_1_) For animals, it's extremely uncommon but researchers were able to [induce myopia in an experiment](_URL_0_)" ]
When you see a tsunami coming in 5 seconds, how safe is diving to the bottom of a pool?	[ "Keep in mind that you might be buried in the pool by that very debris." ]	[ "Lots of good answers so far. Keep in mind that today's Earth is swarming with life. Every single available speck of volume that can support life is teeming with it, even if it's at the microbial level. And every single cell of that life is the end product of billions of years of cutthroat competition and evolution...
How do antivirus programs see what is a virus and not?	[ "The simplest kind just compares against a database of known malware. If it fits, it's malware. (Probably.) More advanced detection uses heuristics that try to determine whether an action being taken by a program or whether certain qualities are nefarious in nature. This allows for currently unknown threats to be s...	[ "It photographs the paper and compares it to real bills. Also real money has magnetic ink they can use to double check them." ]
If a black hole gravity is so strong that it doesn't allow photons to escape, does it mean that photons are susceptible to other star objects' gravity? Would this mean that location of stars is somewhere else than they appear to be?	[ "> If a black hole gravity is so strong that it doesn't allow photons to escape, does it mean that photons are susceptible to other star objects' gravity? Yes. Photons change trajectory if they pass near to other massive objects such as stars (or galaxies when they originate from outside our galaxy). This phenomeno...	[ "The perceived \"color\" of materials is entirely a function of what light is reflected, which is itself dependent on what light is available. So on a star shifted toward red, it would likely appear much darker because there is far less green-blue spectrum light to be reflected and the red light available is being ...
Why/how did taxes become so complex, how come a simple tax, like 30% of income never took root?	[ "> There could still be tax breaks for families and such, for example each child is a few percent of each year. Let's say you drop it 2% per child. If you make $30k/year, that's a tax subsidy of $600 per child. If you make $1M/year, that's a tax subsidy of $20,000 per year per child. Does that seem right? If you an...	[ "You have a lemonade stand. You sell it for 50 cents a cup. One day you find out it's going to be very hot outside and people are going to want more lemonade. You figure you can get away with selling it for a little more since the demand is there. So you start charging 80 cents. You notice that the number of people...
Is it impossible to do certain actions in dreams? For example: reading or punching?	[ "Yea I've also had similar experiences. In a dream I can never hold onto something tightly or make my hand into a tight fist. It's amazing how complex our minds are." ]	[ "Yuo can raed taht way beauce we dno't acluatly raed ervey letter in a wrod, we raed the shpae of the wrod. It's sungrisiprly esay to raed tihs, but relaly anoyinng to write lkie tihs, so the rset I copeid form the intnernt. \"i cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The phaonmneal pwe...
How does exercising reduce blood pressure and cholesterol to counter stokes/heart attacks.	[ "The heart doesn't work alone to pump blood. When you exercise, a lot of other systems kick in to help blood get through the body easier and recycle to the heart more efficiently. Movement of other muscles and one-way valves pushes blood along and veins dilate and contract to direct flow. Exercise makes those syste...	[ "I'm sorry that I'm no expert, but I remember reading about this the last time a similar question was asked: _URL_0_ Basically, you percieve time faster after your run because of endorphines released during the work out, which means that the music seems slower. This is apparently also why a lot of rock musicians pl...
How did we come up with the idea of three meals a day for a normal family?	[ "Breakfast was a recent invention. During and before the middle ages, nothing could be eaten before morning mass. The meal was essentially invented during the industrial revolution for labourers. Lunch pretty much existed forever, and was the main meal of the day - big hearty lunches. It was only until the industri...	[ "Competition among restaurants to show that they were giving the customer the best value for their dollar. \"Well, this place gives me this much food for $5, but that other place gives me even more for the same price!\"" ]
Why are flat head and Phillips head screws both so common? Why is there not one go-to standard?	[ "Because flat and phillips are both garbage. The Robertson screw is the one you want my friend. Stays on the end of your bit, provides great grip, and attractive to boot." ]	[ "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...
What causes degradation of lithium battery life after repeated charge cycles? What practices optimise battery life and what are the reasons behind these?	[ "I don't really know how much those tips really affect modern battery capacity, but the mechanism that causes capacity loss is usually the formation of something called a solid electrolyte interphase. A lithium-ion battery consists of an anode and a cathode with an electrolyte in between them and operates by lithiu...	[ "In simple terms, most circuits that make sound or play back digitally recorded sounds use a timing circuit (like an oscillator) to send out the sound waves at a constant rate. More expensive toys will use crystal-based oscillators and low-battery cutoff circuits to keep things from getting funky as the power level...
Help identifying uniform	[ "Hello there! As your question is related to looking for identification/information regarding military personnel, our [Guide on Military Identification](_URL_0_) may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the ...	[ "Czechoslovakian \"Great Soldier\" medal. Not sure what the exact requirements for receiving one are. Edit \"Excellent Soldier,\" my bad." ]

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