Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
What did mathematician Ron Graham mean by saying that the number 2^120 is "beyond what computers can do; no computer can do 2^120 things right now" ?	[ "It's easy for a computer to represent the number 2^120, but doing that many things is altogether different. If I did the math right, it would take an nVidia GeForce GTX 1080 about 5 quadrillion years to do 2^120 floating point operations. With a number that size, even if you could harness every GPU ever made i...	[ "It's a radome to cover the AN/APS-15 search radar, first fitted to an experimental model designated XPBM-3E then rolled out to production models starting with the PBM-3C (from Squadron/Signal's PBM Mariner in Action). The most common installation of APS-15, also known as H2X (and \"Mickey\" due to some early ins...
Why do giant or massive things in movies - like Godzilla or Titans - always seem to move so slowly?	[ "Its because you perceive their motion relative to themselves (ignoring Square-cube here because so does Hollywood). Consider your fist. It is probably 4-5 inches wide (real rough estimate). If your fist is moving 100 miles per hour (~147 feet per second), it is moving ~353 fist-widths per second. However, lets con...	[ "One thing that slows down division rate is the limited amount of growth factors produced. These growth factors are needed to stimulate the cell division. Other limiting factors may include the limited availability of nutrients (glucose, amino acids, etc.) and oxygen in the uterine environment. Gestation takes long...
Why does swallowing mucus (or phlegm?) cause sore throat?	[ "It doesn't. You're constantly swallowing it, all day, every day. It's continually being produced and swept down the back of your throat. However, fairly often, whatever is causing a runny nose is also causing a sore throat." ]	[ "Your immune system is pretty beastly. Keep in mind the environment in which the human body was conditioned for included ravaging diseases and general filth. Our immune system has adapted to combat common environmental microbes and pathogens through built up passive immunity. Unless the fly transmits something spec...
How/why does the body “get used to” cold or hot objects after being in contact for a while?	[ "No. When we feel an object is cold or hot we are really sensing that is hotter or colder than our skin. We don't feel temperature, we feel the temperature exchange. We don't get used to it, we simply get to the same temperature. If you touch something cold and your hand starts warming it, eventually both surfa...	[ "Neural adaption. Basically, your brain only cares about a change in stimuli rather than every stimulus that comes along. Your brain knows how to ignore a stimulus if it isn't changing. So, if you are tasting/feeling the same thing all the time, your brain is going to ignore it." ]
why is it that whenever I start playing a new game it ends up being all I dream about or see when I close my eyes?	[ "It's called the Tetris effect. From Wikipedia: The Tetris effect (also known as Tetris Syndrome) occurs when people devote so much time and attention to an activity that it begins to pattern their thoughts, mental images, and dreams. It is named after the video game Tetris. _URL_0_" ]	[ "Not a neurologist here, but I had read certain articles way back that explain our learning process. It was sort of like: we learn a certain thing while we are conscious, but this certain thing we learned is only stored as short term memory while we are conscious. The brain processes this information during sleep t...
How can Google make profits by providing free services like Google Map?	[ "\"If a service is free, you're not the client - you're the product.\" Google Maps allows Google to collect data from its users - where you are, what kind of restaurants you like, which places you like to visit. They can use this data to show you ads, or they can charge businesses to make them appear first in your ...	[ "They calculate with what a average person would eat (because jot everyone eats tons just because it's all you can eat) and choose a price after that calculation. There are also person who don't eat much (old people e.g.)." ]
[Medicine] Is it possible for a substance that is in the blood stream to be expelled by the stomach?	[ "You cannot expel fluid from your blood (or, specific to your question, pharmacologically active compounds in your blood) by vomiting. Further, you cannot expel medicine from your intestine by vomiting." ]	[ "Well, food is usually chewed pretty well, so it's easier to take it down. Swallowing a pill is just like swallowing a whole piece of candy, can you do it, yea, but why would you? Nobody wants to chew a pill." ]
What does Thomas Malthus believe in regards to population control and what did he think the most effective policy?	[ "I don't remember much from reading him a long time ago. In general, it seemed like he tried to take the human aspect away from population so we can control them size wise (by killing or controlling like one-child-policy) without feeling abs about actually killing people. I totally agree with Malthus in that we ne...	[ "\"America\" can't, but Texans in his district certainly can. Once every two years they get the opportunity Mr. Smith is a congressman, and he represents one particular place. Only people from that place get to vote for or against him. Unfortunately Mr. Smith represents a wealthy area near Austin, Texas where I sus...
Why do I want to drink something cold when I'm thirsty?	[ "Cold liquids stimulate a reflexive response in us, making us feel satisfied even though the water hasn't had the chance to actually absorb and hydrate us (yet). It's possible this is an evolutionary thing from a time when humans lived in tropical environments where having a cool drink would help to regulate body t...	[ "very simple, Air is a horrible transfer medium for energy, Water is a good tranfter medium for energy. It takes longer for the energy in the air to flow to the ice cube then the energy in the water to flow in the ice cube, When when there is steam in the air, its still maybe 50% humidity compared to 100% humidity...
When was the last time there was such a large difference between public opinion and gov't opinion like we're currently seeing with the Snowden leaks?	[ "This is not a forum to discuss current events. The mods will be deleting any discussion on Snowden and his popularity among U.S. citizens. Yes, we are aware that OP's claim of the public being against the gov't on Snowden might be suspect according to polling. Just answer the question assuming that OP is correct o...	[ "All information transmitted over the Internet could be decrypted at government request. Things like private Facebook groups, stored email, online transactions, that C4 you bought from a Tor store, you know, stuff terrorists might do. It's government trying to harm everyone, not just the very unfortunate very few t...
What happens if a girl takes Viagra?	[ "[Sildenafil](_URL_0_) was actually originally developed to treat pulmonary hypertension, and is still used in certain neonatal populations(occasionally adults) to treat some heart defects/pulmonary hypertension until they can be surgically corrected. The drug does not work because you have male physiology, it simp...	[ "I don't think you would be making this post. because you probably wouldn't be alive. KY sensations would go out of business though." ]
What happens if a child doesn't learn a language?	[ "Well, there is very little data on this for obvious reasons. However the story of Genie* is one modern case of this happening. Reading about that is probably the most information you'll find on the subject. *_URL_0_" ]	[ "Most have a [relay phone](_URL_0_) in their homes - they use an interpreter. [TTY](_URL_1_) is also available on mobile phones, landlines, and in 911 centers." ]
Before the Meiji Restoration was the Japanese aristocracy as overt as the Chinese (the pre 1900 Chinese) in the beliefe that anyone from another culture was inherently uncivilised?	[ "Arguable. While Japanese people continued referring to Westerners as nanban (literally, southern barbarians) until the Meiji era, the Japanese imported a significant amount of knowledge from the Dutch during this time, when all other Westerners were forbidden from entering Japan. This was called \"Rangaku,\" or Du...	[ "hi! not intending to quash more enthusiastic contributions from the arts experts around here, but there have been at least a couple of related discussions that can get you started question \"What were some of the do's and don'ts for watching an opera in the time of Handel or Mozart or Rossini and when did etiquett...
If we built a rotating spacecraft (for emulating gravity), would we be able to feel the rotation?	[ "Yes. You're basically talking about the [Coriolis effect](_URL_0_). Imagine you're climbing \"up\" in a ladder, and in this context \"up\" would mean to the center of rotation as it is opposite to the direction of gravity. As you get closer to the center you move into circles that move more slowly, but your body's...	[ "Falling with Style. With much practice, our eyes and inner-ears work together to provide the brain with information. We aren't aware that this is going on, but fun house spinning tunnels mess with our eyes and spinning around really fast messes with our inner ears, both making walking difficult. We don't \"think a...
Why haven't satellites been put in permanent orbit around other planets or moons?	[ "We do have a few such missions but satellites are never in permanent orbit. They eventually get slowed down through atmospheric drag or subtle differences in gravity around the planet or other satellites messing up their orbit. The MESSENGER probe orbiting Mercury lost speed because the Sun was tugging on it. Arou...	[ "Do the best with what you have. Florida and California are US launch sites because they are good enough. There's certainly an advantage to an equator launch, but logistically and practically its far easier to launch from home... and cheaper! Baikonur (Kazakhstan) fits a similar idea... although being the USSR's la...
Was the Panzerlied actually sung often by the Wehrmacht?	[ "Hard to say exactly as they don't exactly record how often songs are sung. That said Panzerlied was a song that's supposed to be specific to the Panzerwaffe arm, which was always only a small fraction of the Wermacht. It consisted of around 20 Divisions at any given time out of an army of over a hundred Divisions....	[ "Started in America, translated into 18 languages, catchy as heck and that's likely why it was accepted into several cultures' traditions. warner owns the rights, public performance could be subject to royalties. mobile, sorry: _URL_0_" ]
Do nuclear fuel rods decay uniformly?	[ "Radioactive decay happens uniformly, but induced fission reactions don’t happen uniformly across the core. Fuel assemblies can be moved around in order to get a more uniform burnup throughout the core." ]	[ "> Is it true that stars orbit the galactic center at the same speed, regardless of their distance from it? Yes, or pretty close to that. Remember, too, this is speed, not angular speed. > Is this still thought to be an effect of dark matter? Yes. > How would dark matter need to be dispersed to create the resul...
Why's it impossible to imagine a new color?	[ "You haven't expounded on what you mean very well. It definitely is possible to imagine a different colour. For example slightly less red and slightly more white than any pink colour you have experienced. If you mean imagine a FOO colour then yes it isn't possible. Colour is a description of how humans experience E...	[ "Vsauce did an excellent job answering this exact question, if you haven't seen the video. _URL_0_" ]
How do prosecutors prove someone had been sexually assaulted decades ago? Assuming no physical evidence, isn't it all hearsay?	[ "Hearsay has a specific definition, which is saying that someone made a statement to you that can't be independently verified. So, if I say, \"John told me he raped Susan,\" that's hearsay because I'm claiming that he told me something that can't be independently proven. For such a confession, John would have to ma...	[ "You may want to read this: _URL_1_ AMA by /u/Sterling_Mace about his experiences in Peleliu. He has written a book about the experience as well, and done other AMAs and comments around reddit a lot. He is also very open to talking about his experiences, and there are a few examples/instances of him discussing pe...
How have cars increased in horsepower so much in the last 15 years whilst the engines are the same size or even smaller?	[ "Turbos, higher compression, less frictional losses, more efficient induction - take your pick just about everything has been tweaked and it adds up" ]	[ "Several reasons: * Better technology. Many chambers were detected by sonar or radar. They would send a signal through the stones and listen for irregular echoes. Today's sonar and radar imaging techniques are better than they were in the past. The equipment is more sensitive, uses different frequencies, and with d...
Why do hot drinks feel even more hot when you're drinking through a straw?	[ "I'm going to hazard a guess here and say it's because you're concentrating the hot liquid on one part of your mouth. If you drink without a straw, you get to spread out more of the drink, so it's cooler. With the straw, you just get a blast of hot liquid on one specific spot. Think of it like why people can lay on...	[ "When you blow to cool things down part of the air comes from your lungs, but a greater part is pulled from the surrounding air by the vacuum you create blowing. When you blow to heat something up you get much closer and try to minimize the surrounding air. There is a good video I will try to find asking people how...
Why doesn't thin film interference work with thicker films?	[ "It does. If you take a thick film you have so many different wavelengths that can fit in it that they all blend together. Basically your eye cant really tell the difference. There are some other factors too, but basically there just isnt enough resolution." ]	[ "_URL_0_ The short answer is, \"things get complicated when there are a lot of electrons.\" When you have to start taking into account things like Special Relativity, things start to go funny in a way that's hard to explain with simple universal rules." ]
What are quarks(or any elementary particle) made of?	[ "Nothing, they're not made of anything. They're fundamental point particles, not composite. (Most likely, in the face of experimental evidence and theoretical consideration). That does not mean they're not an emergent phenomenon from some more complete theory - there are various ways in which this could be. However...	[ "in short, no, the pattern will not change. Observing in this sense doesn't actually mean observing. When people say the electrons are being \"observed,\" they really mean that they are being \"measured.\" By passing them through the slit, you are essentially measuring their position - you know that they are in the...
Why does the Earth have magnetic poles?	[ "The earth's core is molten metal moving constantly. The metal itself may or may not have any (net) magnetic property, but due to the fact that it is moving added to that it has residual electrical charges (static electricity and the earth's net polarity) creates a magnetic field. Just like a moving magnet causes ...	[ "Look at [this picture](_URL_0_). Pretty much gets the idea across. The lines in the picture represent magentic field lines. Note how the disk is sorta \"pinched\" between them. In that fashion the disk is held in place." ]
Why does warm salt water ease the pain from a toothache?	[ "The pain is from inflamation (swelling) that is cells filled with a lot of water. Salt water has more sodium compared to the water in the inflamed cells (in this situation the salt water is called hypertonic) and when that happens, the water leaves the inflamed area to be with the greater amount of sodium. As the ...	[ "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." ]
They say that when a supernova happens a small amount of heavy metal is produced, but how much would a star produce?	[ "It depends very heavily on the type of star that went supernova, as well as that star's mass. The most metal-rich supernovas may convert about 2% or so of their mass into iron and other metals. Iron will tend to be the most abundant, but not always. Heavier elements tend to become exponentially more rare. _URL_0_"...	[ "I fear the graph is still up to date - no new records since them. JT-60U still has the highest triple product. ITER should beat it, but not before 2027. It should release 10 times more fusion power than necessary input power when run with DT plasma (2035+), a huge milestone. After that it is \"just\" making a viab...
Why can't I remember any memories before the age of 6 or 7?	[ "You know how mom and dad kept telling you not to climb the back of the couch? Well... You didn't listen." ]	[ "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...
Does water in a pot boil faster when the lid of the pot is on or off?	[ "Your friend was correct. But this is such an easy experiment to do at home, I'm surprised you didn't do it yourselves. The fact is that a huge amount of heat is lost if you leave the lid off, and the pot boils significantly faster with the lid on. You will also find that with the lid on, the pot will stay boiling ...	[ "There are several contributors to this effect. First, oil has a higher specific heat than air. The average specific heat of a continuous medium (air, vegetable oil, etc) is what we use to describe the amount of energy it takes to raise that medium's temperature compared to a different medium. Air in an oven might...
What allowed Charlemagne to create a professional army in the Early Middle Ages, when the realms of the High Middle Ages were unable to create professional armies?	[ "Follow up question, how different was Charlemagne's system from that of earlier Frankish rulers, and from that of the visigoths and other western states?" ]	[ "The process you are interested in is called [baryogenesis](_URL_1_). It is not yet known how this process occured, but there are several proposals. In order to find a viable model it must obey the famous sakharov conditions (B,C, CP violation and departure from thermal equilibrium) I think the two most widespread ...
Why people stop wearing cape/cloak?	[ "We didn't, where do you think jackets and coats came from? It started as long cloaks, which turned into shorter riding cloaks, which we gave sleeves and became jackets and coats." ]	[ "Horse meat isn't rare at all. You can get it in many parts of europe. Tastes ok too. Anyway, that's culture. The same reason we think that bacon and eggs is a breakfast food, and don't eat grasshoppers." ]
What happens when system32 is deleted?	[ "> what happens to the computer Nothing at all will happen to the computer, your installation of windows may stop working though and you'll need to either repair or reinstall it." ]	[ "Basically, the federal government spends the money congress says it should spend; we have a lot of that money in yearly budgets (congress passes appropriations bills, that basically say spend $x for y,z... between Oct/1 and Sept 30); all those appropriations bills expire on Oct 1, so after that, the federal govern...
I inherited a few Russian/Soviet war(?) medals. Can anyone identify them? Are they valuable? (Pictures inside)	[ "Starting from the left, we have two Orders of Labor Glory, 1st class. Created in 1974, these were meant to be awarded for exceptional labor achievements. Then we have three Orders of the Red Star, established in 1930 and awarded to Armed Force Personnel for exceptional effort in the defense of the Soviet Union. Th...	[ "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...
What's the difference between the various cuts of steak?	[ "[Here is a good rundown on common steakhouse cuts.](_URL_0_) Feel free to ask your waiter as well. If he is good at his job he'll be able to give you all the ins-and-outs of the different menu options." ]	[ "Proof of work: I trust this because it was \"carved in stone\" and accepted by the community. The work involved in crafting it makes it near impossible to tamper with it. Proof of stake: I trust this because it was created by, and signed by people who have a a personal stake in it." ]
What does this Moody's downgrade of China mean?	[ "China has a major problem with debt, many of the companies run by the government like steel industries are making a loss on the steel that they make. However because China doesn't want to close the steel plants and put the people out of work it hides the debt. Moody's now thinks that this debt may have got to a cr...	[ "The film the MPAA reviews often is not completely finished. MPAA rating can be time consuming, so they send the movie early and finish up special effects and such, or even added scenes." ]
What was the popular and critical reaction to the first issue of Playboy Magazine?	[ "Follow up: How new/revolutionary was the concept of a magazine like playboy? Was it particularly noteworthy? Or are we just aware of it because it is the most successful magazine of its kind?" ]	[ "I don’t think there’s anything to explain. Sometimes we as humans are just hypocrites. Why is Bill Clinton given a pass on all the allegations against him? Why do people follow some bits of the bible and reject the bits they don’t like? Humans are strange." ]
Do all Aboriginal Australians share the same Dreamtime myth?	[ "No, if you go to the Museum of National History in Canberra they have a great exhibit explaining some of the variation of the dreamtime myths. I visited in 2013 so I cannot re-call details I'm afraid, but although they all run along a similar theme the characters differ as do which animals formed which landscapes ...	[ "Your question reminded me of this old thread: [How accurate is the popular US perception that Native Americans lost their land \"because they didn't understand the concept of ownership?\"](_URL_0_) Not sure if the sources there cover Native concepts of ownership pre-colonization. But it might interest you." ]
How is the testosterone level in a human body measured and calculated ?	[ "Testosterone is a hormone. It is released primarily through the testes in males, but also present in females (Produced in adrenal glands and ovaries). Hormones are basically just an activator that flows throughout the blood. Only certain cells (target cells) will recognize the hormone and allow it to enter through...	[ "A lot of it would be smell and pheromones wouldn't it? That's why male dogs go nuts when female dogs are in heat - they can smell the pheromones they're giving off (from some distance away I might add)." ]
Does a Higgs-Boson particle have mass?	[ "Yes the Higgs boson has mass. Its mass has been measured to be around 125 times the mass of a proton." ]	[ "Do physicists think dark matter really exist or is it something they've made up temporarily to explain something they don't really understand?" ]
How did circumcision develop as an ancient tradition integral to certain religions?	[ "Scientists don't know exactly why circumcision developed as a cultural practice. The two common theories are: 1. For hygiene. The foreskin is an easy place for germs to collect and frequent baths are not something you can get everyday if you live in the desert. 2. For \"Purity\". The foreskin is very sensitive and...	[ "As a reminder, [top-level answers](_URL_0_) in this community need to be \"comprehensive and imformative.\" Single-links to Wikipedia and unsourced opinions do not clear that bar. This question already rests on a part of history hamstrung by the fuzzy diagnostics of diseases in the past and an almost unavoidable b...
Can Reza Aslan refer to himself as an historian?	[ "You do not need a degree in \"history\" from an accredited US university to be a historian. It just helps. I have a degree in history and I don't consider myself more of a historian than Azlan who has done more critical religious research than I ever will. Anyone who disregards him just because he didn't go to som...	[ "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." ]
Why does seeing or smelling something "gross" induce vomiting?	[ "Something that smells \"gross\" typically means because it's rotting or isn't good for you. It's your body's natural response so you don't end up eating it." ]	[ "There's two different survival instincts at play when it comes to eating. There's the instinct to eat a wide variety of foods, which helps a kid survive when certain foods become unavailable, as well as making sure they're getting all the nutrients they need. This is why some kids are willing to eat anything. Then...
Does one addiction reinforce the brain's Dopamine reward-loop for other addictions?	[ "No, not really. What does happen though is that rather than making someone prone to just one addiciton there are factors that make people prone to all addiciton. Basically most drugs today are chemical replacments for the neurotransmitters that are released during normal human interaction. With opiods imitating fe...	[ "Generalising, but it's because the body has two broad drivers of feeding: * direct nutrient deficit (ie, you need energy - or at least, your body thinks you need energy!) * pleasurable food consumption - also known as [hedonic hunger](_URL_1_). Hedonic hunger probably primarily evolved to promote the consumption o...
Why does it seem like video games from the newest generation seem to have far more bugs and glitches than previous generation games?	[ "A few factors ... * New games are way more complex. This means more code, and as the number of bugs per LoC is pretty static you get more bugs. * Today it is pretty trivial to push patches to the users as they have fast internet. * Deadlines have become a bigger factor esp. when it comes to franchise titles." ]	[ "Computers run on sets of instructions telling it how to run all the parts of the computer and build an interface so you can use those parts. Say you're following a recipe for a cake. Then you finish the cake and someone comes along with a better way to make a cake by adding another ingredient and changing how muc...
Why isn't every person entitled to food, water, and shelter?	[ "What level would they be entitled to? How much food? Just enough to survive? Why should the government provide this instead of citizens providing this for themselves whenever possible?" ]	[ "Building is often done in bulk, dozens of houses at a time, which means you get economies of scale, not just in the materials etc, but in the laying on of services. Building a row of houses needs a trench dug for the sewer connections, for example, but you can do the whole row at one time - likewise the foundation...
How can Samsung agree to manufacture iPhone panels and at the same time have pending patent case with them?	[ "They sign an agreement with Apple in which they agree to manufacture panels for the iphone despite the fact that they have a pending case against Apple. Just because you're suing someone doesn't mean you can't do business with them." ]	[ "Foxconn wanted to build TVs in Wisconsin. The generation refers to the generation of TV factories. You can read more about Gen 10.5 TV factories here: _URL_0_" ]
Why must coffee be sold so hot it takes 15 minutes before it's cool enough to drink?	[ "Barista here--it's a number of things. We brew it at the optimum temperature to ensure the best flavor, which is ridiculously hot (helps pull the caffeine out of the bean too!). Mixed expresso drinks also require streaming milk to around 140 degrees because it makes the milk sweeter. We know you might want to add ...	[ "Stations charge by the second to run a commercial. Shaving down to the most recognizable parts after the long version has run saves money." ]
How can another persons hands feel colder to the touch than ambient room temperature?	[ "This is for the same reason a piece of metal or granite can feel cold to the touch. Your hands are generally warmer than the ambient temperature. The problem is that air is a very poor conductor of heat, while metal is a very good conductor of heat. Metal will feel cold because it absorbs heat from your body much ...	[ "The most roundabout way that I can see anything like this happening is that the caffeine in tea is acting as a vasodialator(sp?), opening the blood vessels, allowing more blood to reach his skin, and lowering his internal temperature? I could be way off though, as that was a total shot in the dark." ]
- Why does stepping on Lego hurt so bad?	[ "It's smaller, so the pressure doesn't get distributed across your skin. Smaller, sharper objects tend to hurt more. It doesn't help that LEGOs are almost completely edges." ]	[ "Well the effect is kind of like fingernails on the chalkboard... one explanation is that it is an evolutionary aversion since the sound is actuually similar to primate warning calls. Another explanation is that the sound resonates in the ear canal, making it \"sound loud\" Source: _URL_0_" ]
How does salt water conduct electricity and normal water does not?	[ "So salt is composed of two elements, Sodium, a metal and Chlorine, a non-metal which makes NaCl. Metals like sodium form what are called positive ions and non metals like chlorine form negative ions. These two ions are attracted together and form a bond. However when put into water the bonds break up and the water...	[ "Because the costs associated with developing and maintaining the infrastructure to get seawater (or unprocessed fresh water) into buildings outweighs the costs of using clean water (specifically the cleaning process) which is already required in buildings." ]
Why does does being in the ER take forever?	[ "Because they have limited resources, and they take the most critical cases first. Add to that that so many ERs are clogged up with people who use it as their primary physician anytime they are sick." ]	[ "Imma answer your question, but first let me tell you about this time I watered the lawn on a warm july afternoon, there were clouds in the sky and childrens laughter.... ok seriously, who knows, maybe they just like to hear themselves type, or create an emotional connection to the recipe, perhaps they are just kil...
How would artificial gravity on something like a Stanford torus differ from regular gravity on a planet?	[ "The only difference I can think of is the gravitational acceleration. If you create a space habitat far smaller than Earth, the difference between the acceleration due to simulated gravity of two vertically-aligned points will be noticeable. Here on Earth, two vertically-aligned points which are 10 meters apart wi...	[ "Plant cells have little starchy organelles called statoliths - they're much heavier than other components of the cells. The statoliths fall to the bottom of the cells. In cells in the stem, statoliths on the bottom of the cell trigger the hormone auxin to inhibit growth on the lower part of the cell. This makes ...
Given it's awful roots and horrific connotations, why is the N-word such a huge part of black culture?	[ "It's used as a sort of \"togetherness\" word. Racists wanted to lump them all together into one derogatory word. They took that word and they use it to band together and embrace their culture and their people." ]	[ "It's pretty simple, really: Microsoft [adopted TNR as a default system font](_URL_0_) in Windows in 1992. Windows achieved remarkable dominance — it still holds more than a 90% share of [the desktop OS market](_URL_1_) — and Microsoft Office achieved similar success in the productivity software market. So essentia...
Is gravity theoretically faster than the speed of light?	[ "The speed of gravity -- say, as measured by the speed of gravitational waves -- is the same as the speed of light. The best paper on this is one by [Carlip](_URL_0_)." ]	[ "> If the time dilation (w.r.t. a \"far off\" observer) approaches infinity as one approaches the event horizon of a black hole, how can anything ever fall into a black hole from an external observer's point of view? You're exactly right. Things crossing the event horizon seem to take forever from an outside point...
In a single-payer health care program, or medicare, or medicaid where all the bills are just sent to the government, what is the incentive for health care providers to have competitive prices?	[ "The government has a fixed rate that they pay at. A practitioner has the right to charge more than this rate, but the consumer must then pay the \"gap\" between the governmental rate and what the doctor is charging. The government pays a reasonable rate. In Australia, they pay $33 for a 1/4 hour GP, which then pay...	[ "> It's a lot faster, but why? Because Google Fiber gives it's users faster speeds. > Why can't other ISPs do the same/similar thing as well? Because they like money. Let's look at Google Fiber vs FiOS (which is also fiber), why charge customers $70/month for 1000Mbps when you can charge them $75/month for 7...
How do we know what dead languages (Latin, Ancient Greek, etc) sounded like?	[ "My high school Latin teacher said that the Romans actually wrote down how they sound for educational purposes. That is, they wrote about how the foreigners are misprouncing latin, maybe. I know that's not a good source, sorry." ]	[ "As our bodies age, we lose muscle mass, our mucous membranes thin and become more dry, and we lose some of the fine coordination that we had in younger years. It is no surprise that these changes occur in the larynx as well, and this leads to changes in our voice. Your doctor may call these changes vocal cord atro...
What does the wobble of the earth's axis have on the weather?	[ "You are on the correct trail in researching Milankovitch cycles. The question of does it effect weather is really one of time-scales. The characteristic time scale of Axial precession (wobble) is 26,000 years so any effect on our 'weather' would be on similar time-scales. It is basically impossible for something w...	[ "If I am not misstanke the reason it the [Analemma](_URL_0_) of the sun. If you take a picture of the sun at the same time during a year is move in a figure 8 like in this picture _URL_0_#/media/File:Analemma_fishburn.tif The sun will be at the lowers location it location on the sky more a lot horizontally at the t...
What exactly are brainwaves?	[ "Synchronization of brain activity where action potentials have a regular wavefront. You can see the phenomenon here: _URL_0_" ]	[ "_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." ]
When did the King stop being the most important political figure in England?	[ "The power of the kings has fluctuated with time, and there have been several low points at which the king was weak. When [Henry II](_URL_1_) killed Archbishop Thomas Becket in 1170, the Church had him publicly whipped in Canterbury Cathedral, showing who was in charge in that period. Oliver Cromwell executed king ...	[ "Hi there -- while we've approved this question, we would like to remind potential respondents of our [current events](_URL_0_) (AKA \"20-year\") rule -- it's fine to discuss events through 1997 (inclusive) and their effects, but not events after 1997. Thanks!" ]
Why do China and India have such large populations when compared to other nations?	[ "The land has been agriculturally rich since ancient times, and was (a)geographically contiguous, and (b)geographically protected by mountain ranges. This allowed distinct cultures to evolve in the Indian subcontinent and in Eastern China, while also protecting them to a large extent from the instability of Greater...	[ "They don't live in Manhattan or Brooklyn... they live in the less expensive boroughs like the Bronx or Queens. And they cram more people/family members into apartments than elsewhere." ]
How do sites know when you're using an ad block extension?	[ "They typically do it by using an algorithm that baits the adblocker into blocking a honeypot and checking if the honeypot is still there. When the webpage loads, it loads a script that is blocked by the adblocker, then another script is loaded to check if the script is still there - if it's not it displays a messa...	[ "You're a customer of the cable company... the networks themselves don't necessarily get money from you, they need to make their own money to support their own programming." ]
What happened in America during the English Cromwellian period, and how much did the influence of parliamentarians influence the nascent "American" ideology?	[ "During the Cromwellian period we don't see a King James, James I was the king before Charles I, (the start of the Cromwellian) and Charles II whose directly after the Cromwellian, James II is after him. However we see a large migration of Puritans in this period, Cromwell himself was getting ready to leave directl...	[ "Hi - we as mods have approved this thread, because while this is a homework question, it is asking for clarification or resources, rather than the answer itself, which is fine according to [our rules](_URL_1_). This policy is further explained in this [Rules Roundtable thread](_URL_3_) and this [META Thread](_URL_...
How do vitamins work?	[ "Vitamins are little tiny bits of stuff that your body doesn’t make but needs to grow and work. Food has those little tiny bits in it (good food has more of those bits). After eating, your stomach juices take these bits into your blood and veins where different body parts take what they need and either use it to do...	[ "Have an easy explanation from the guy who's literally the best at easy science explanations: _URL_0_" ]
Questions about the Ancient Greek Economy	[ "Olive oil has been mentioned, but perhaps not emphasized enough. Judging from the numbers of amphorae found in shipwrecks, I guess that olive oil and wine were major agricultural products and also traded. From the number of pictures of fishermen on pottery it would also seem that fishing was an important source of...	[ "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?" ]
Why didn't the Romans ever conquer Ireland?	[ "Romans had a top heavy empire, so they needed to make a fast profit off of invasions. Ireland is poor in mineral wealth and its farmland was unsuited for typical Roman crops, so there was little point in invading it." ]	[ "Hi, I'm Dr Jim Leary, lecturer in Archaeology and Director of the [Archaeology Field School](_URL_3_) at the University of Reading in England. I'm going to be here in AskHistorians to give an AMA on the 10th of November at 5pm GMT. I'll be talking about my work on round mounds, which included recently [discoverin...
Do spiders drink water?	[ "Absolutely, in fact they subsist explicitly on fluids. They don't have teeth or mandibles to break down their food, instead they use their fangs to inject a venom into their victims which digests them, letting the spiders then suck them in as they would a fluid. Similarly, they don't have a full set of muscles and...	[ "Here is a link to help. They basically have a tube that is separate from their throat, so they do not choke [click here](_URL_0_)" ]
What are waves, if not movement patterns of particles?	[ "> Can someone please tell me exactly what 'waves' refer to in the former statement? Electromagnetic waves are another name for photons. Photons are not waves, and they're also not particles as you imagine particles to be. They're \"quantum particles\". They exhibit some of the same properties that waves exhibit,...	[ "Imagine you grew up flying in a plane. The ground looks like different colors. There's a green area over here, and a brown area over there. When you land for the first time, you're surprised that the green area is actually made up of large trees, and the brown area is made of rocks and shrubs. There are thousands ...
How is recreational cannabis legal in some american states despite being illegal under american federal law? if states can overrule federal law what power does federal law have?	[ "They can't overrule it. If the federal government wanted to send DEA agents to Colorado and shut down every weed dispensary, Colorado could not stop them. The only reason states are getting away with it is because the federal government has decided not to take action." ]	[ "I'm not crazy about looking to Nazi law as a source of how the government worked. Insofar as there were such laws under the Third Reich, they were generally subordinated to the Führerprinzip, meaning that absolute subordination to the will of one's superiors was what was generally valued, rather than legalistic o...
Is it possible to lose weight by going on a cold-water diet?	[ "This question has been asked [here](_URL_0_) and touched on [here](_URL_1_) as well as some other threads I can't find at the moment. The effect of drinking cold water would have a minimal/negligible effect on daily calorie intake. AFAIK brain freeze is the [soft palate](_URL_2_) in the rear of your mouth cooling ...	[ "2 reasons, physical & chemical. Physical: The lithium-ion battery in your phone requires an electrolyte (liquid) of Li+ ions. At really Low temperatures this will freeze and prevent the phone from being used. Chemical: the voltage produced by the battery depends on reversible chemical reactions. The rate of these ...
Why are barrel bombs so bad?	[ "Explosives are categorized by burn rate. High explosives (high burn rate explosives) provide a quick “punch” that are good for shattering rock etc but don’t scatter a lot of material. Burying high explosives in the sand would do almost nothing when detonated. Low burn rate explosives have a large gas expansion whi...	[ "It's just the odds. Cities take up an incredibly small percentage of the total amount of land. And sometimes they do hit cities, as people in Moore and Joplin and Birmingham can attest to. Think of it this way... take a taco out to a parking lot. Put it in the middle. Walk to the edge of the parking lot, and, with...
What is happening to my vision when I'm sleepy?	[ "Yer not alone in askin', and kind strangers have explained: 1. [ELI5: When we feel drowsy, why do our eyes lose focus first before any other senses? ](_URL_2_) (702 comments!) 1. [ELI5: Why/how do our eyes \"lose focus\" and get blurry? What's happening? ](_URL_1_) 1. [ELI5: What happens when your mind drifts, and...	[ "That could merely be a subjective experience, but this experience can be helped by the fact that your perception of far-off landmarks is vastly reduced. You measure movement by the movement of landmarks in relation to you, and at night you cannot see far-off landmarks. Because of this, you only see things that are...
How come the airline market has not consolidated into a few large companies?	[ "Actually the air travel industry has been consolidating. Just look at the last five or so years - we've seen Delta and Northwest merge, Continental and United merge, and U.S. Air and American Airlines merge..." ]	[ "Because they really don't like the idea of going to Federal Pound-Me-In-The-Ass Prison. It's called [price-fixing](_URL_0_), and is illegal." ]
Were Stalin and the Soviet government worried about Russian soldiers in WW2 bringing back western ideas?	[ "Not a historian, but the Soviet soldiers hadn't really taken advanced courses in German, English or French. I think that back in the 40s education was still limited mostly to learning to read and write and few basic courses of maths, geography etc. During war, the soldiers would have spent majority of time with ot...	[ "Definitely donate them, or at least let someone make facsimile copies or transcripts of them! New sources are always a welcome addition that enable new and interesting research and could mean a lot to many researchers. If you want extra cool-points find a capable and trustworthy graduate student who is interested ...
Why was France and not Britain the first to experience a demographic bottleneck due to industrialization?	[ "Part of the answer is that France's demographic decline began well before industrialization, for reasons unrelated to industrialization — though when it did industrialize in the 19th Century that doubtless played a role. Among the other factors causing France's demographic slowdown were casualties from the Revolut...	[ "I suppose it's a combination of whether its a more pleasing sound and the familiarity with the \"old\" place. York and Orleans and even Hampshire are, or at least were, recognizable as the old place, but a small island in the English Channel is easier to overlook." ]
How does mental fatigue work?	[ "I don't know, man ... I'm too tired to think about it." ]	[ "Genetically speaking it exists because it poses a survival advantage. Sometimes the guys who go out hunting get killed by the tiger, and the ones who gather nuts and berries near the cave live to pass on their genes. Also some studies show that depresses persons have a more accurate appraisal of the world. So in...
Why would travelling faster than the speed of light equate to time travel?	[ "It's because all observers measure c to be a constant value. They find that they all disagree with how they make measures of distance and time. So it turns out that what is faster than light for one observer is actually backwards in time for another observer with a relative motion away from the first. This i...	[ "It isn't. Almost completely impossible. General Relativity is a set of equations on the one side, the arrangement of energy and mass, on the other side, the curvature of space. To do physics, we usually start on the energy and mass side, put in some known energy configuration, like a spherically symmetric mass, an...
Why do we crave things especially when we cannot have them?	[ "Instead of the \"levels\" of craving themselves changing, remember that the way you remember things influences the way you view them. In the case of craving things more when you can't have them, maybe the times that you can't have them are more memorable than the times you can. Because you remember times that ...	[ "You're just viewing it from your perspective. To me, junk food is good but I'd rather eat properly prepared broccoli. Try accustoming yourself to different foods and healthier foods and you'll see that junk food does not always have the better taste." ]
How can racing games that run at 60fps have timers that give times with milliseconds of difference, when one frame is 16-17 milliseconds?	[ "The framerate only tells you how often the screen updates, the cpu might have a clockspeed much higher than that, it is entirely possible to simulate the last half a second per millisecond to calculate the actual time in miliseconds" ]	[ "Another component worth mentioning is that YouTube clips can 'intelligently buffer', while GIFs lack this functionality. Imagine your friend likes pistachios, but hates opening them. You, in your infinite kindness, start to crack open the shells and placing the open pistachios next to him/her. If your friend were ...
How did we determine the value of pi?	[ "It might be good to see how Archimedes calculated pi. [Here's a short video explaining it](_URL_2_). Essentially, if you inscribe regular polygons with more and more sides, into a circle of radius 1/2, then these polygons will look more and more like the circle. A polygon with 1,000,000 sides looks a lot like a ci...	[ "Go to a new area of Australia (or wherever). Comb one acre very carefully, cataloging every species. Figure out how many new species there are. Do this in a few different places, figure out about how many new species there are in general, and extrapolate." ]
Why does my stomach growl?	[ "It's because you have gases in your stomach and the movement of them is what causes the sound. When you have less found in your stomach, you have more air which is why it growls more often when you are hungry." ]	[ "Its a perspective thing basically you see it more during the day so the changes are less noticeable but when you sleep there is a bigger time gap so more changes happen" ]
Why does sleep deprivation cause extreme tiredness instead of burning more calories to support the energy usage throughout the day?	[ "After being deprived of sleep for long enough the body will begin to \"replace\" sleep with calories. Your body still needs the sleep of course but it begins to do what it needs to do to continue working. If you ever want to see this in action, it is common among the crab fishing crews in the Bering Sea. I've seen...	[ "Our brains didn't evolve with cars in mind. They evolved with, like, being hunted by a jaguar (or whatever) in mind. So your brain doesn't know what to do with a car. It thinks hey, we're sitting, our body's not really doing anything physical, there's very little activity or stimulus... this seems like a good time...
What does the new Obama policy about overtime mean for salaried workers?	[ "Employees are either classified as \"exempt\" or \"non-exempt\". If you're exempt, then you work on salary. They pay you what they pay you no matter how much you work. If you're non-exempt, however, they must pay you for every hour worked. The law has been such that the cutoff for that is ~$23,000. So if you make ...	[ "This comes from Malcolm Gladwell. He is a pop psych writer and no one should listen to him. The [10,000 hour deal has been debunked](_URL_0_) in a study." ]
Why is that even though it's generally accepted that infidelity is one of the worst things that can happen in one's life, it's still so common?	[ "People are selfish & bad at looking through the consequence of their actions. They're really good at making excuses and rationalizing shitty actions to themselves. They lack empathy & feel they deserve to feel good. People are also really shitty at breaking up. One person is frequently checked out of a relations...	[ "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...
How do the people who plan high school reunions find everyone after years of being away from their home towns?	[ "They usually remember their names. You can also ask your school for a name list and they usually have it. From there you can just facebook search people. If you can not find someone you can ask his friends from school etc." ]	[ "IP addresses can be used for a rudimentary location fix, but they're typically rather inaccurate (limited to the general region at best). Much better location data can be obtained by analyzing which WiFi networks your device is able to see. Google has a database of WiFi networks and their physical location (send f...
My supermarket now only sells flouride free tooth paste. Are there any legitimate reasons to do this, or is it just mass paranoia?	[ "A study that was in Nature found that fluoride in toothpaste was beneficial. > The results showed that less wear was produced in the presence of the fluoride toothpaste than in the presence of the non-fluoride toothpaste with an otherwise identical formulation (P < 0.001), and that the amount of tooth wear in vit...	[ "In short, marketing. Long answer, just repeat that phrase like you're [Steve Ballmer at the MIX '08 conference] (_URL_0_). Dasani (Coca-Cola), Aquafina (Pepsi), and co marketed the hell out of Bottled Water claiming all these health benefits and the \"purity\" of it and how much \"better\" it was for you compared ...
What exactly happens when one "lucid dreams"	[ "Essentially, you enter a weird state where you're in sleep-paralysis, and trick you're body into believing that you are sleeping when in reality you're awake and aware. This usually happens on accident, but can be achieved on purpose through sleeping. tl;dr: staying still for a long time and consistent breathing t...	[ "I love this question. There is a movie called Waking Life that addresses this idea. The whole movie is on YouTube right now for free and is awesome. Check it out. But at the minute 40:35 is when your question gets talked about. _URL_8_" ]
What exactly is the ‘human condition’?	[ "The human condition is the awareness of our own mortality and diminuitiveness in the universe. The poignancy that we always want what we can't have, will never have everything we wanted in life, and will always have regrets about things we cannot change. > *In these bodies we will live, in these bodies we will di...	[ "You are currently processing crystal clear images of your surroundings, focusing on this post, reading squiggles and translating them into sounds, connecting those sounds into words forming sentences with meaning while simultaneously feeling your hand on your mouse, smelling the air, hearing and interpreting sound...
Why do ice cubes bond together only after adding fluid?	[ "The ice cubes are below freezing. When you pour water on them, some of it freezes between them." ]	[ "for the same reason that objects in a \"room temperature\" room all seem to be different temperatures, the air or a piece of wood might not feel cold, but tile might. in actuality, they are the same temperature. Varying degrees of thermal conductivity make us perceive that some things are colder than others. Water...
How far does the light from a laser pointer travel?	[ "The photon from the laser pointer will travel infinity until something stop it. But the laser itself contains million of photons, and the further they travel, the further they are away from each other. You can test it yourself by pointing at something and walk closer, the dot become smaller but more clear, walk ba...	[ "To a fixed point in space, usually the star it is orbiting." ]
Why cant i smell or taste when I catch a cold?	[ "When you have a cold, phlegm blocks the passages to the olfactory receptors at the top of the nose meaning that less air is going to pass over them. Thus, fewer molecules are reaching the olfactory cells because they are being blocked by the phlegm. The taste of food is determined more by smell than taste, so the ...	[ "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." ]
During the age of sail, how did large ships maneuver in ports?	[ "hi! fyi, here are a few posts that may be of interest * [How would a medieval ship dock in a port?](_URL_4_) - featuring /u/jschooltiger and /u/mormengil * [How did ships dock during the Age of Sail.](_URL_5_) - /u/mormengil & /u/MarcEcko * [How would a historical sailing ship dock at a quay?](_URL_3_) - /u/mormen...	[ "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 Earth have a magnetic field when nearly all the core is above the Curie temperature of iron?	[ "The magnetic field of earth is not created the same way as the magnetic field in a permanent magnet, where the aligned orbits or spins (not sure which one) has a lower energy, and holds up to the curie temperature, but more by movement (so you could probably compare it more with an electromagnet. See this page on ...	[ "Look at [this picture](_URL_0_). Pretty much gets the idea across. The lines in the picture represent magentic field lines. Note how the disk is sorta \"pinched\" between them. In that fashion the disk is held in place." ]
Why does hitting your "funny bone"trigger pain and numbness in your entire arm and hand?	[ "The nerve that leads to your forearm, ring and pinky fingers (ulnar nerve, otherwise called the funnybone) runs on the outwise edge of your elbow joint, meaning it is partially exposed and can be stimulated with pressure. Normally a nerve knows where it's been stimulated because just the tips of the branches are t...	[ "There are a few factors at work here : Moſt chairs are deſigned to ſit at about knee height ; they generally ſupport your back, and more importantly, your butt and legs. Toilets are uſually lower, and they are made with a large hole in the middle, into which you ſink a little. This lower height, lack of ſupport,...
If a peasant in 1500's Europe wanted some affordable armor, what were his options?	[ "Follow up question: would anyone who wasn't a knight have need for armour, or how would they deal with personal threats?" ]	[ "The National Archives has a rough-and-ready calculator, for UK prices at ten-year intervals back to 1270. Unfortunately, it is no longer updated, so it still gives 2005 equivalents. But it may be better than nothing: _URL_0_ The most useful feature may be the wages calculation - a labourer's wages provide somethin...
Why flash is not supported on tablets?	[ "Flash can be supported, however Apple made a conscious decision not to support it because of [reasons listed here](_URL_0_). It still isn't supported on Apple's tablets (or other tablets) because flash is relatively inefficient, taking lots of battery to achieve tasks that can usually be done more efficiently. T...	[ "To put simply, infrastructure costs and up keeping requires a huge amount of money. Which cannot be covered by advertisements ." ]
How does free webpages make money?	[ "Normally by advertising. When you create a page they'll inject an advertisement on to the page, when the user clicks it the company offering the service will be paid (or in some cases they'll be paid every time the advert shows however this is rare). Other than that they may offer premium services, allowing you to...	[ "Welcome to the tech era. If you're not paying to use the product, *you* are the product." ]
What's the difference between the S & P 500, DOW, NASDAQ, and the NYSE?	[ "The school is selling cookies to raise money. S & P 500 is a collection of the 500 highest selling students. Dow (Dow Jones Industrial Average) is the average of the schools 30 best students. NASDAQ is the schools largest bake sale (stock exchange), but students can't buy baked good from each other, it's done via...	[ "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...
Cordoba is often estimated to have been the most populous city in 1000AD. How and why did its population fall to its modest present day figure?	[ "Cordoba was most certainly not the most populous city in the world in 1000 CE, that would almost certainly be Kaifeng. Can you post where you are getting your figures?" ]	[ "Not a historian, just someone who likes to lurk and learn new things, but I can maybe point you to a few similar questions I’ve seen about kids and their obsessions while you wait to hear from an expert. [This post](_URL_2_) has an ancient Roman source from u/rkiga that mentions a toddler obsessed with birds. Furt...
Why do current gen consoles have amazing graphics and VR games still look like they're from 10 years ago?	[ "VR Games have to keep the total latency (the time from you input a command -- such as moving your head -- until it is reflected in images rendered) extremely low in order to avoid VR sickness. If it takes too long for your head movement to have a visible effect, your brain gets confused and you can start feeling...	[ "Foods actually taste different! Everyone has the same [five types of taste buds](_URL_1_). When you taste something, the flavour comes from a molecule in the food interacting with the taste receptors on the surfaces of taste buds, which sends a nerve response to the brain. But not all taste receptors can react to ...
What is the practical significance of ENTHALPY? (Both in chemistry and physics)	[ "Enthalpy is an incredibly useful quantity in thermodynamics. It is given by H = U + PV Where U is internal energy, P is pressure, and V is volume. Since U, P, and V are state functions, H is also a state function. Enthalpy takes into account the energy used for expansion. One of the more useful properties of enth...	[ "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...
How are undersea internet cables repaired?	[ "There are many reasons that under sea fiber-optic cables can get damaged - under sea earthquakes, damage by ship's anchors & fishing trawlers, chewing of cables by sharks, etc. The cables can be as deep as 8000 meters and laying these cables is a very expensive affair. When damaged, the operator needs to first asc...	[ "A village well's. There is enough water deep undeground, just not at the surface. And most beduins today have satelite dishes and internet, So i think they are managing just fine :D" ]

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