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What is a bond? I'm looking into getting a peddlers license and it says theres a 2000 dollar bond, and I have no idea on what that is
[ "A bond is, essentially, a check, that someone holds so that they can cash it if you owe them money and aren't able to pay. Bonds are issued by a group called a surety. The surety puts the bond up for you, and you pay a premium to the surety. I'd guess the premium for a $2000 bond would be on the order of $100 or s...
[ "Ping (delay) and bandwidth (transfer speed) are two different things. Ping measures how long it takes for a signal to travel across the medium. With 100 ping it takes 100 ms, or 1/10th of a second for the signal to travel to the server and back. Ping is hard to improve upon as it is physically limited by things su...
Did British conceptions of sexuality, gender and gender roles spread through colonial governments? If so, how?
[ "Yes, certainly. One of the most prominent examples was New York. Under Dutch law, women could inherit property and money. In English law, women's property became their husband's property in the event of marriage. After the British took over the colony, they went about imposing English law, but found significant re...
[ "I just want to take a moment to thank Dan Monroe, Director and CEO of the Peabody Essex Museum in Salem, MA. His continued neglect of the Phillips Library Collections, and ensuring that the collection was unavailable both physically and digitally to researchers over the past 2 years (and for the forseeable futur...
Why can't neutrinos just be the new fastest thing in the universe?
[ "the speed of light isn't so much the speed that light travels as light travels at c. Like there's a fundamental speed of our universe, the relationship between measures of space and time, and that's c. And massless things can only travel at c. And massive things must always travel slower than that. And neutrinos h...
[ "They haven't been observed in the real world. So, they are essentially theoretical constructs that mostly keep science journalists employed speculating about them (along with a handful of theoretical physicist), and useful plot devices for sci-fi stories." ]
Why do they always abandon major event buildings (Stadium for World Cup) instead of selling them off or re-purposing them for something else?
[ "\"Always\" is certainly false. A large number of such buildings worldwide have been kept for their original purpose, or turned to another use. But when they are abandoned, there are various reasons, including: 1. The building was not built to last. 2. The shape and layout of the building is not suitable to any oth...
[ "_URL_0_ Short answer: the physics change with the scale. If you built a house exactly to scale, but 3 times its normal size, it would collapse under its own weight. Conversely, if you build the house at 1/10th scale, you could probably drop it several times its height without much damage." ]
How come if fat is stored up excess energy, why can't heavier people do more athletic activities than skinnier people?
[ "Two reasons: 1. fat is long-term storage, which means it is used to slowly release energy when you are low on food, not quickly release energy when you are doing exercise. 2. fat is heavy, moving heavy objects is hard EDIT: heavy in the sense of: you carry around like 20+ kg on you if you are fat, not in the sense...
[ "> Also, how do morbidly obese females not get estrogen-related cancers faster than normal? *Anyone* morbidly obese is at a greater risk of certain types of cancers. But at a greatest risk doesn't mean 'you will definitely totally get this within half a year'. So, they are at a greater risk, but that doesn't necess...
Let's say we have a person submerged in a large tank of water, and the tank is traveling a brisk 30 mph or so. Suddenly, it collides with a stationary wall. What happens to the diver?
[ "Here's some actual data (from J Aviat Med. 1958 Jun;29(6):433-7. Protection against acceleration forces in animals by immersion in water. MARGARIA R, GUALTIEROTTI T, SPINELLI D.): * 8 out of 10 rats survived a brief acceleration of 1000g while submerged in water, while nearly 100% died during a brief acceleration ...
[ "From your perspective, at 100% of the speed of light, no time will have passed. Though at your house on Earth, your goldfish will have died." ]
My Grandfather was in the Royal Navy in WWII, yet the Russians awarded him a medal. What medal would he most likely have been given?
[ "Arctic convoys delivering supplies to Russia. Does it look like the medal in [this](_URL_0_) page?" ]
[ "Radio links were tightly regulated. Part of the Nazi propaganda effort was full control of the airwaves, and making sure everyone had access to them, so they produced two types of very cheap receivers German citizens were encouraged to buy. Germans were only allowed to listen to Nazi controlled stations. Being cau...
what is the deep web?
[ "All the deep web is, are things that aren't indexed by search engines. Stuff that's not on Google, Yahoo, etc. Look up TOR and check out .onion sites if you're really interested. But be VERY careful what you click on." ]
[ "Even with Reddit's search function, typing in your question yields [two other results](_URL_1_), so you could imagine how often this question is asked! A [smarter search term](_URL_0_) yields many more results." ]
Did people comment on the Great Vowel Shift while it was happening? Did any language purists try to stop it?
[ "There is evidence of the change as it was happening -- for example in comparisons of English with foreign languages, or in the spelling reform proposals of the so-called \"orthoepists\". However, I'm not aware of much \"peeving\" (complaints about the changing pronunciation). Two examples may perhaps be found in [...
[ "The historians I've worked with relied on a lot of Geertz's work to explain the history of insular Southeast Asia, as well as other anthropologists. Perhaps one of the largest and first being Edmund Leach and his study *Political Systems of Highland Burma: A Study of Kachin Social Structure*, which helped explain ...
If the planck length is the shortest distance possible, does that mean that a singularity is just one cubic planck length?
[ "The Planck length is not an exact measure. It is just an estimation of the *order of magnitude* of the length scale in which quantum gravity effects are expected to be important. Its value even changes depending of the normalization (using 4πG=1 instead of G=1 leads to a different value of the Planck units). Physi...
[ "The \"standard model of cosmology\", i.e. [the lambda-CDM model](_URL_0_) treats dark energy as the result of having a non-zero cosmological constant. \"Constant\" being the key word. Ideas like the Big Rip only come about when you imagine a cosmology where the cosmological \"constant\" is actually some elaborate ...
What happens to the body's cells when we die?
[ "Last year researchers determined that death spreads like a wave throughout the body and is actually a process that begins a significant period of time before the final loss of brain activity and continues until well afterwards. For further information, look into research papers on [death flourescence](_URL_0_)" ]
[ "Having excavated graves before, even the coffin breaks down. You wind up with soil filling the void, stained with whatever remnant particles there are. Colored by the wood and what have you. Some degree of tougher structures may remain, coffin adornments (metal pieces), whatever amount of bone is left. I've seen b...
I want to major in history and have a few questions about the requirements.
[ "Your requirements are going to depend on what university you attend. They're all a bit different. I had to take college algebra and statistics, but some universities only require one math class, and I'm sure there are some that require more. I know figuring out program requirements can be a pain in the ass, and it...
[ "Citing a statute is fairly simple. It generally follows the following pattern: > short title, statute volume (including jurisdiction and year), chapter number, section number (if needed) Also, most acts include a line about how they can be cited (their short title). The first point of the War Measures Act is: > ...
Why did America abandon the gold standard?
[ "The entire world abandoned the gold standard because it is inferior. Gold having value is just as arbitrary and just as much a fiat currency as our current system. It just artificially restrains the amount of money you are able to print. That gives virtually no benefit to a country, and when you look at countries...
[ "Costs money to build and maintain the facilities, some countries don't feel like taking on the burden of that cost." ]
[Physics] Photoelectric effect and its uses?
[ "This may not be practical in the conventional sense, but it's important in the characterization world. The photoelectric effect is key to a measurement technique called x-ray photoelectron spectroscopy (XPS), where we can identify the atoms at the very surface of a material by shining an X-ray beam at them. The hi...
[ "They don't really save that much in fossil fuels if they are powered by them originally, but you can't power a gasoline car with hydroelectric, or solar, or wind, or nuclear power. But another major benefit is that even if you ultimately use fossil fuels to power an electric car, those fuels can be burned in a pow...
Why is mint the optimal flavor toothpaste and mouthwash?
[ "We strongly associate the sensation of mint with coolness & freshness. Naturally, toothpaste/mouthwash companies want you to feel fresh when you use their product, as that will make you trust it more - so they flavour it with mint. Mint contains a compound that is sort of the opposite of capsaicin (found in chilli...
[ "[This](_URL_0_) previous thread explains it as [entrainment](_URL_2_). When changing the diameter of your lips, the airflow is subject to the [Bernoulli effect](_URL_1_) where it speeds up. When the air moves faster, it draws in more surrounding air which is cooler than your body temperature, thus making it feel c...
Why do toe nails typically have fungus while fingernails usually don't?
[ "Toenails often are confined in a dark, warm, moist environment — inside your shoes — where fungi can thrive. Toes usually have less blood flow than do fingers, making it harder for your body's immune system to detect and stop infection." ]
[ "I could flip the question and ask why Felidae (housecats to cheetas to tigers) has so much more variety of physical characteristics than Canidae (wolves to foxes to dogs)." ]
Why does it start to rain immediately after thunder?
[ "It doesn't. That may be a coincidence you are noticing. It can thunder without rain (heat storms, etc). It can rain without thunder." ]
[ "The networks/stations own the rights to air the shows, but the episode orders come from the syndication companies. So The Big Bang Theory is on Peachtree TV in Atlanta, but Warner Brothers is the Syndicator, and they provide the episodes and the order. The reason 2 parters are run out of sequence on back to back s...
How do we know the functions of different parts of the brain?
[ "A good source of this information is victims of brain trauma. Everything from gunshot wounds to bumps on the head. A guy with metal rebar through his brain has certain effects from the damage and the area of the brain affected is plain to see. Also the ability to view varying brain activity in real time has made i...
[ "We don't, we go by the most logical and most common accounts. If there is a fight with 10 people, and 6 of them all say the same thing and the evidence backs it up, then the other 4 saying it was aliens was probably wrong." ]
Why aren't Great Danes and Chihuahuas considered separate species? When does speciation occur?
[ "If it fucks, makes a baby, and that baby can fuck and make a baby? Same species. Fuck, make a baby, but that baby cab only fuck and not make more babies? Related genus but not the same. Can fuck bug not make babies? Completely different species. Can't even fuck one another? Not trying hard enough. Can't fuck but...
[ "Xenotransfusion has been attempted in the 1600s, with mixed results, with sheep blood. Ape and chimp blood might work, as would pig blood as they all have similar Rh factors. Source: _URL_0_ Also, dog to cat transfusions can be done, bit only once as the cat will make antibodies to the blood. Also, apes, dogs, ca...
What is this patch from WWII?
[ "It's a WWII-era \"blood chit\" - asking for aid, and a promise for payment if the downed airmen was aided and returned to the American military. The exact text varies depending on the patch." ]
[ "Hi OP, I've temporarily removed your post per our rule to protect personal privacy - _URL_0_. Could you either remove the link to your grandfather's docs, or modify the images to block out his name (and the names of any other people not serving in an official capacity), and any other identifying information. Then ...
If you drain out the blood veins of a person who has HIV and give them new donated blood, will it cure them?
[ "No, because the virus is not located exclusively in the blood. The person would still have it." ]
[ "Diamonds from countries that violate human rights in their mining are called blood diamonds. Some countries do restrict importing from blood diamond countries. The US has had such a restriction on Sierra Leone's diamonds since 2001, and set up the Clean Diamond Trade Act in 2003 specifically to try and combat it. ...
The Memorialization of 9/11 vs Pearl Harbor
[ "Hi there, this is a great question and one that I'm going to go ahead and allow, BUT a note to commenters: Please keep in mind our [current events rule for commenting](_URL_0_), and restrict your answers to the memorialization of Pearl Harbor (and/or other large national events), and specifically not to discussion...
[ "Elvis. How many Beatles impersonators and look-alike contests and dolls and statues and paintings and... do you see? I would argue that Elvis was actually a larger phenomenon over a longer period of time. Today kids say \"who were the Beatles\" but they know Elvis. In 1637, [Tulip mania](_URL_0_)." ]
How do TV Street Magicians work? If actors are used then why does nobody expose them online?
[ "Any magician employing actors to fool people with would get non-disclosure agreements signed by the actors and could pursue civil action (i.e. lawsuits) if they did speak out. So there is little to be gained from actors speaking out since people already know magic acts are trickery, and potentially a lot to lose l...
[ "Still photos can be much higher resolution since the camera doesn't have to process 24 FPS or anything. The shutter speed is also much more customizable. The lower shutter speed required for video creates motion blur between frames. This can be desired in video but the sharpness of a still frame with a fast shutt...
What does the "10W-30" or "5W-20" of motor oil mean?
[ "Viscosity difference from cold start to operating temp. Flows like a 10 weight (thin) at start to lube a cold engine quickly and a then protects as a thicker 30 weight to protect better at hotter temp range. Putting in 10/30 isn't going to be catastrophic for a one time mistake run in a warmer climate, though I'd ...
[ "Regular butter - yes, Shea butter - never heard of it. Look up 'Bullet proof coffee'. Basically, natural fats (butter, coconut oil, heavy cream) are good for you. Put them in coffee for a morning pick-me-up that doubles as a meal. Goes great with a low-carb diet and/or fasting." ]
Why are some noises (rain, flowing water, a rotating fan) soothing to humans? Are these same sounds soothing to other animals?
[ "Some noises [like fans] are good psychoaccoustic maskers. Fans produce sound over a wide spectrum of our hearing and are good for masking (making seem non-apparent) the sounds of things like your house settling [as it cools], the fridge kicking on, your partner tossing in bed, etc. They also help move the air whic...
[ "We move our heads as a signal of recognizing and following a musical pattern, aka rhythm. If you listen to most music you will be able to bob your head along since (most often than not) music follows a single tempo, and can just be broken down into multiple beat intervals. This is the way a metronome works. If you...
are there any conditions at which a liquid would float on top of a gas?
[ "There is the Leidenfrost effect (waterdrop on the stove), but that is a dynamic effect. Staticly it is probably imposible. If you use the same units you will see that the lighest liquid is still 60× heavier .6g/cm3 vs .012g/cm3." ]
[ "All things strive to be in equilibrium. For the water, this equilibrium is reached when the air around it becomes completely saturated with water. Leaving a glass of water in a room with air that's not already saturated with water is like dropping a bit of food coloring into a pool. The food coloring (water) sprea...
How hard would it be to find the hacker who leaked the nudes?
[ "He would have to be a complete amateur to post them from his home IP address. He either used a proxy, or uploaded them from somewhere else. Someone who'd make a rookie mistake that bad almost certainly wouldn't have the skill to get the pictures in the first place." ]
[ "Whoever carries out the assassination of Kim Jong Un has this to look forward to: - A death sentence. - A death sentence being placed on several generations of their family, and *possibly* other relations (such as known friends or their entire hometown). - No certainty that it would change anything at all." ]
If losing a child is inherently mentally damaging, does that means that, for most of history, the majority of the adult population lived their lives with serious emotional trauma? How did the huge child mortality rates impact general mental health and behaviour?
[ "As a follow up, would the impact be lower in close-knit tribes of hunter gatherers with better social support than would be found in agriculturally-based civilizations with greater social stratification and more physical/socio-cultural barriers to group intimacy? And what role do certain beliefs regarding babies/s...
[ "The foods one I can answer. We evolved to like high caloric foods because we needed the calories when we were struggling to survive. Thus fatty or sugary foods taste good to us because it used to be great to eat them. Well now it's too easy to overindulge and weve made processed foods that have way more fat or sug...
What would happen to a car struck by lightning?
[ "If it's metal it would act as a Faraday cage. _URL_0_ _URL_1_" ]
[ "Waster is a good conductor, which means that the electrical current from the lightening is able to travel over the surface rather than go underneath. Same way a Faraday cage protects things inside. Most fish don't surface that often so they're generally safe under the water. Unlike humans that need to surface freq...
Why do we always "cut" a globe down the Pacific Ocean to make a map instead of the Atlantic Ocean?
[ "The Prime Meridian (0 degrees longitude) runs through the UK and is usually right in the center of a world map. To the right are the eastern longitudes, and to the left are the western longitudes. This matches real life because if you face north, east is to the right and west is to the left. It also goes back to w...
[ "From the exact same XKCD article that you linked: > (Climates can be hard to predict—for example, in our world, Somalia and French Guiana both sit on the equator, at the eastern coast of a continent, and seem like they should both receive a tropical sea breeze. But coastal French Guiana is dense rain forest while...
What is the oldest joke that we know of?
[ "\"Something which has never occurred since time immemorial; a young woman did not fart in her husband's lap.\" Which is bad sentence structure, but I think it's basically saying wives fart in their husband's laps a lot? Anyways, you can find a pretty interesting article about the study in which this was published...
[ "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...
Is Sharia Law a legitimate threat in the US?
[ "Muslims form less than 3% of the US population. I don't see how such a tiny group could impose its own laws on the US, any more than tiny Christian populations can impose Christian laws on Islamic countries. Even when the British rules vast swathes of the Islamic world they could not impose Christian or even Europ...
[ "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." ]
What books would you recommend for Seven Years' War and Thirty Years' War
[ "The most cited English-language book is *The Thirty Years' War: Europe's Tragedy* by Peter Wilson. To this recommendation I would add *The Thirty Years' War* by Geoffrey Parker. These two books are highly complimentary, for such a complex topic. For more advanced reading, I like Cramer's *The Thirty Years' War an...
[ "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_...
What happens to objects covered in a super hydrophobic coating when dropped into water?
[ "The interaction between the object at the water only happens at the very surface. Some hydrophobic coatings will trap a small amount of air when you drop them into water, so there might be a tiny increase in buoyancy from that. The effective volume of the object (the amount of water it displaces) will be increased...
[ "It's called the oligodynamic effect. Here you can read about it, but usually it's pretty easy to google these types of questions: _URL_0_ Apparently several heavy metals do it including copper (Brass is an alloy of copper) and silver. Basically heavy metal ions bond with bits of proteins in bacteria and make them ...
Why does squinting help you see better?
[ "It can also restrict the amount of area that the cornea is using to gather light, increasing the depth of field for near or farsighted people, allowing them to see slightly better at ranges the normally have trouble with. Basically, the smaller the opening, the less focusing your eyes' lenses have to do. Less lig...
[ "Could somebody explain how, if true, small amounts of alcohol is good for you?" ]
When watching a painful video (ex: a bicycle crash), why do our nerves seem to become active, as if we are feeling the pain ourselves, for a split second?
[ "2 possible reasons. 1) Humans have special kinds of neurons called mirror neurons that allow you to \"feel\" in a limited sense what other humans are feeling. This is helpful to build empathy and lasting relationships. 2) Our brains are also constantly learning and trying to simulate the effects of the environment...
[ "Simply put for the same reason drinking water when you're not thirsty isn't as refreshing as when you're REALLY thirsty. Anticipating the bodies' needs doesn't trigger the same reward responses in the brain as fulfilling a need that is already present. Your muscles don't NEED to stretch right now, so you can't ant...
Why do humans have fingernails
[ "* digging in dirt * scratching * /r/popping * picking scabs * toothpicks * screwdrivers * tiny crowbars * legos * soda can openers * peeling stuff From wikipedia:A healthy finger nail has the function of protecting the distal phalanx, the fingertip, and the surrounding soft tissues from injuries. It also serves to...
[ "It's simply easier to draw over and over. Fun fact: the only character on the Simpsons with five fingers is God." ]
Why do dreams often end at the good part, with no resolution?
[ "If dreams are just fragments of thoughts from your waking mind being filed away by your subconscious, there's no reason why they would have to have an ending. It's less like watching a finished movie and more like watching a bunch of clips from various films being organized in a back room. Disclaimer: No one yet k...
[ "There is a back door into every house. People put alarms all over their house. Have a key? You can get in the front door. When you need to break in you use the back door. Now only bad people use the back doors. So when someone comes in the back door, the alarm goes off. Your crack is a bad person, technically. He ...
What makes our brain different than a computer?
[ "Just a few differences off the top om my head: * Brains are ever-changing. It literally grows and morphs all the time. As a child grows, their brain physically grows. A computer cannot grow * Brains have more connections than computers (e.g. neurons) * Brains degrade gracefully. That means when you lose function i...
[ "Above post is a great explanation! If you want to simplify it, you could say that bacteria actually attack the cells of your body, while viruses take over your cells biological processes in order to survive (so technically viruses aren't living, they need their host in order to live and reproduce)" ]
How does touchscreen responds when we touch it? Why does it accidentally responds when we touch it with other specific objects?
[ "There are a few different technologies. I assume you are thinking of the touch screen on your phone screen. That works because the screen is electrified just a little bit, not enough for you to even notice. When you touch the screen it messes up the electrical field. The computer can measure how the field changes ...
[ "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...
Comcast just quoted me $3,578/month for Gigabit internet for my small business. How is this a real number?!
[ "They're quoting you the \"I have servers and need high reliability\" level of service, not the \"I need to browse the internet\" level of service. If you want to run a server farm with gigabit speed, you're asking for *upload* speeds of a gigabit, with low latency and high accessibility. You may need to talk to ...
[ "The supreme court had previously held that making private copies available for use by others was legal in Canada (see BMG vs. John Doe). As such, there was no legal copyright infringement that copyright holders could use as leverage to get (the subpoenas required to get) ISPs to disclose the identities of the file...
How are bones nourished?
[ "Bones aren't actually solid rods and plates - bones is more like a mesh of calcium phosphate, which sometimes has other tissues mixed in. ([A picture says a thousand words](_URL_0_)). Blood vessels snake through the gaps, carrying blood to nourish the bone cells. That's also how new red blood cells get from bone m...
[ "> Do the nutrients consumed by the person/plant get converted into something? Yes." ]
Is sleeping from 4AM to 12AM detrimental to health?
[ "You might run into difficulties with the daylight adjustment - humans are built to be more awake when it's light and more asleep when it's dark. After a while it messes with your circadian rhythm (which controls when you wake up and go to sleep, and to a degree when you get hungry), and your sleep isn't 'as good'....
[ "Now I am by no means a biologist, so I know I’m not answering or explaining but I can share a little of my own experience. I work free lance in the film industry so I will work long days weeks and hours for a period of time and then be unemployed while I try to arrange the next project. At the end of every shoot, ...
what exactly does the "blackbox" of an airplane contain ?
[ "The flight data recorder, which is all of the detail of the planes route, altitude, some technical information, etc, as well as the recordings of all radio communications and of the cockpit." ]
[ "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...
Deep Fried Ice Cream
[ "The ice cream itself is not fried. It is surrounded by batter (like a donut) which is fried -- quickly enough that most of the ice cream doesn't melt, especially as the batter acts as a heat insulator." ]
[ "Yes, though I can only find a GIF of the infinite chocolate bar. _URL_0_" ]
Do larger birds grow larger feathers?
[ "In general, the size of the wing feathers on a flighted bird will be proportional to the weight of the bird, and inversely proportional to the length of the wings. That is just for wing feathers on birds that can fly. Some very large birds are covered in down (very small feathers) and sexual selection can produce ...
[ "The wings and everything are based on the needs of the aircraft and it's job. Long wings generate lots of lift at lower speeds, but will become damaged or even destroyed at high speeds. They're also not good for aircraft that make lots of sudden turns, like a fighter. They'd snap right off. Fighters and more agile...
How scientists can use my DNA to determine where my ancestors originated from.
[ "Essentially, your DNA holds genetic markers. These markers are signs of specific mutations that popped in different areas at different times. By looking at these markers they could say \"Well, you had an ancestor that has Marker M82, that means that you have an ancestor that was an Iroquois in the Great Lakes regi...
[ "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...
When the moon is visible during the day time, is there any measurable difference in brightness outside than when the moon is not visible?
[ "There is technically a difference, but I don't think it would be measurable. The sun provides about [1362 Watts of energy per square meter of Earth (W/m^(2))](_URL_0_). The full moon provides [about 0.0068 W/m^(2)](_URL_1_) of reflected sunlight to the Earth. That's [200000 times less energy](_URL_2_). And the oth...
[ "There are basically two classes of radiation. Ionizing radiation is the high energy stuff like UV Rays, X-Rays, and Gamma Rays. These particles have enough energy that they can basically knock electrons off of atoms they hit. Or in human body terms, they can basically punch holes in your DNA. That's why it can cau...
Why would anyone want to be in the medieval vanguard?
[ "The van is not an order of battle, it is the first of 3 parts in an advancing military formation (an army on the march) - the advanced guard's job is to seek out the enemy and pin it down for long enough so that the main body can swing in and crush them. A good clear example of this, abeit in the Napoleonic Era, w...
[ "A lot of veterans have job skills limited to the military and can't do much when they leave the military." ]
Why are larger objects often depicted as moving in slow motion when viewed from the perspective of a smaller objecr?
[ "Because large animals like elephants move more slowly than small animals like dogs. If an elephant moved at the speed of a dog, the forces involved would exceed the strength of the materials an elephant is made from." ]
[ "Another possible answer that has Ben discussed is this: When you are 5, and have a birthday party, you haven't had many birthdays and so your brain is working very hard to remember, absorb, and understand, all of the workings of a birthday. This is why time 'feels' long when we are younger, our brains notepad is w...
Why over millions of years of evolution has the size of animals decreased, would we not expect the size of animals to increase as large as dinosaurs?
[ "A combination of extinction events and the limiting factor that animals only get as big as the environments that support them will let them. The largest dinosaurs like Diplodocus needed tremendous amounts of plant food to fuel those massive massive sauroid bodies. They were around a VERY long time as a peak plant...
[ "Sure. Look at (domestic) cats and dogs. They differ physically far more than humans do. If you think that's an unfair example because we've been breeding them for a long time, then look at the eastern gray squirrel. They come in grey and black versions, which vary by location. Here in the Toronto area they are alm...
what is perturbation theory?
[ "So in physics it's usually like an additional term to a potential energy surface. What that means is it's where you take a possibly \"perfect\" model system and add something extra to it to try and account for differences between the model and reality. The something extra is called a perturbation. This sometimes l...
[ "Imagine two people holding the ends of a jump rope, with one person shaking their hand up and down but neither of the people moving their arms much. There are only so many shapes waves can take along the rope. [These](_URL_0_). This is the principle behind the wavefunctions: there are only so many shapes they can ...
What is the purpose of terrorist attacks, if they only give the group a bad name?
[ "Apparently Osama bin Laden said that the purpose of his campaign was to destabilise the USA by bankrupting it. He claimed similar tactics brought about the collapse of the Soviet Union in 1980s and early 1990s when they got bogged down in an expensive war in Afghanistan. In other arenas, the IRA would claim that t...
[ "I don't so much think of it as an evolutionary thing. There's really no benefit to being confused. It comes down to computing power. Your brain just takes a minute to recall old information/piece together new information to develop an idea of where you are and how you got there. I'm currently in flight school and...
Why is everyone "still feeling the effects of recession" when the stock market seems to show better numbers than before the Dot-Com bust.
[ "I think the best ELI5 answer is, GDP is up, but so is inequality. When the crash happened, income was widely lost across all income groups. Since the crash, the economy has rebounded, but [virtually all gains went to the wealthiest people.](_URL_4_) > > The average income for the richest 1 percent of Americans, e...
[ "Your employer takes money out of your paycheck throughout the year to pay your local, state, and federal taxes. The amount they take out, however, is just an estimate how much tax you will probably owe at the end of the year. There's no way for the state, local, and federal governments to know what you actually do...
Why is poverty used as an excuse for crime in developed nations when there are poor people all over the world who make a living by honest means?
[ "In my experience, the people with low morals and ethics tend to also be the people with no motivation to work hard (crime = easy money). These people often do not contribute to their communities but still feel like they are owed a better life. They end up as the lowest economic class, and then blame 'society' for ...
[ "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 huge stores enforce a customer ban?
[ "I used to work in retail and the answer is poorly. We can't possibly track any given customer across hundreds or thousands of potential stores. The ban really has two purposes: - It is a deterrent - many customers are too afraid of consequences to show up at the store again. - _If_ we do recognize them, we have ju...
[ "You actually get an email from amazon, asking you if you can answer the questions (usually a product you recently bought). My best guess would be that they think they are directly asked by that person. Doesn't make much sense, but so doesn't answering the question with a bad answer." ]
What happens to the POTUS after he finishes his time in office?
[ "Under the [Former Presidents Act](_URL_0_) they get a pension of $203,700 per year for the rest of their lives. Not that they need it. Most former presidents get paid a lot to speak at events. They usually help their party out by drumming up support for the candidates that come after. They also assist in the cons...
[ "Similar [questions has been asked many times](_URL_2_). Please refer to those questions for further information. [This might be the simplest summary for Republican candidates](_URL_0_). Note that as of now, only Romney, Santorum, Gingrich, and Paul are still in the race. Obama is the incumbent president, therefo...
How much latitude do you have in the (US) military to disobey a direct order?
[ "It depends on the country of course, but for Germany the following is the case: You aren't only allowed, but obliged to disobey and morally or ethically questionable orders. It is your right to refuse to serve in the military." ]
[ "Know what, it's a cop-out and doesn't really answer the question, but some fantastic context can be found in a [recent Frontline](_URL_0_) called 'Syria behind the lines,' where they managed to embed one journalist with a rebel group on one side of a valley and another with the Syrian army unit on the other side."...
[Military] Can someone help identify what unit my great grandfather served in during ww2 ?
[ "Handwriting has changed over the years, hasn't it? It would appear that he showed up for service with the 2nd Australian Imperial Force , lasted only 8 weeks, and then showed up for a reserve unit, 3rd Infantry Brigade. The AIFs were Australia's expeditionary force. 1st AIF was WW1, 2nd AIF was WW2. With a term of...
[ "Sorry, we don't allow [\"trivia seeking\" questions](_URL_0_). These tend to produce threads which are collections of disjointed, partial responses, and not the in-depth discussions about a particular topic we're looking for. If you have a specific question about an historical event, period, or person, please feel...
How could a being in a curved 1 dimensional universe determine that its universe is indeed curved?
[ "In fact, there is no way to do whatyou want to do. You can distinguish between a compact and non-compact one-dimensional space (i.e., the topology of a circle vs. the topology of a line), but curved vs. flat has no real meaning here." ]
[ "Think about things bouncing around. Imagine a box with a fan in it. Put 20 balls in ithe box. Now imagine a basket to one side just the right size for the balls. Turn on the fan. The balls jump around randomly. At some point a ball will fall into the basket. This will happen at a given rate which will depends on h...
Does your metabolism slow down as you age and if so, how?
[ "The age-related decrease in BMR is almost entirely explained by the loss of lean body mass. Once LBM is controlled for, the effect of age seems to be minuscule. In [this study](_URL_0_), age explained only 2% of the observed variation vs. 63% for LBM." ]
[ "Every time you make a copy of a cell, there is a chance for errors. For example when you photocopy a first print, it is pretty crisp and close to the original, but there are a few minor discrepencies. Now if you photocopy the copy, it gets more distorted, and so on until some letters get hard to read, it gets diff...
Why can't I burn fat and build muscle at the same time?
[ "Actually, you can. Not YOU per se, but there are people who can. The reason is, in order to lose fat you need an environment in which your body can use it, so when you work out your body burns up the excess fat and sometimes a little muscle. In order to gain muscle you need a calorie surplus (usually in the form ...
[ "The short version in this case is because F=ma is a rather large simplification of the Conservation of Momentum, and this simplification only works for non-relativistic cases. Once you start dealing with the long forms of the equations involved, it becomes apparent that for something with mass to accelerate to the...
Why aren't pico projectors a huge thing now, and why aren't they the number one feature in all smartphones?
[ "because they suck and everyone still has a laptop or a tablet. So...if you ask me, until they work better AND the phone can replace a laptop/tablet then it's just wasted money. If you're sitting there with your laptop/table and your pico projector phone and you wanna watch something it's not a hard decision. They ...
[ "I'd like to add this. In WWII they retrofitted some Spitfire airplanes with up to 5 cameras that used this exact same principal to take 3D areal recon photos of Europe. The cameras were aligned just right (and pilots trained just right) take take photos that could be put under a special viewing device bringing the...
Why do we say that dinosaurs went extinct, as opposed to evolving into modern cousins (birds and lizards)?
[ "Again, lizards are not dinosaurs. There is large, conclusive geological evidence for a mass extinction event and a strong scientific consensus for the cause. There were dinosaurs before, there weren't dinosaurs after. The ancestor of lizards separated from the line which became dinosaurs long before there were din...
[ "People are very bad at assessing long term risks. We haven't evolved to handle dangers and risks of long term activities. Even though we intellectually know the risks, it is hard for us to translate that intellectual knowledge into behavior, as it does not tell our instincts that it is dangerous. We instinctively ...
How are singers allowed to earn money on songs they cover from other singers? Like Adele on Bob Dylan's song "Make You Feel My Love" and numerous others? Isn't that copyright?
[ "Copyright only applies if they used it *without* permission. Bob Dylan gets a slice of whatever Adele makes on \"Make You Feel My Love\"." ]
[ "Adblock Plus works at a browser level on the client PC. It executes its blocking code after all the content from the server has been delivered. There's nothing a site can usually do about it in terms of forcing an ad to go through. What they *can* do is detect whether or not the ad is being blocked, then change t...
Can neutrinos pass through a black hole?
[ "You know the saying \"All roads lead to Rome?\" The equivalent for black holes is \"all paths lead to the center.\"" ]
[ "Nice idea, but it won't work. There are a few reasons: (1) We know dark matter does not feel the electromagnetic force. If the dark matter were Dyson spheres, from absorbing the energy of the stars they surround, they would radiate in the infrared, and so we'd detect this. In fact, people have looked, and [no Dyso...
What other times of history have had as much pessimism and as many doomsday prophecies as today?
[ "The 14th century was pretty bleak. Not only did you have the Black Death, but that was preceded by some terrible weather. The Little Ice Age had begun its prelude towards the end of the 13th century and picked up speed throughout the 14th century. Incessant rain ruined crops and washed seeds away, so there was mas...
[ "There isn't any downside to saying the sky is falling. Politicians aren't vying for the votes of economics professors, they are vying for the votes of people who don't have the willingness to look up the numbers themselves." ]
Why do toilets use fresh, drinkable water instead of water from undeniable sources such as the ocean or lakes?
[ "Because it would require an entirely separate water supply network which we don't have. Additionally, salt water is much more corrosive than drinking water, so it will be harder to maintain." ]
[ "Human babies live the womb surrounded by and breathing amniotic fluid. Their hearts have extra holes which seal themselves after birth which accommodate their reversed blood flow. We mammals adapt from an all fluid environment to a—**gasp**—no fluid environment. Tadpoles are humans. Ta da!" ]
Why didn't Charles V give the entirety of his empire to either his brother or son?
[ "Because of proto-nationalistic and governance concerns. Charles's empire was enormous and unwieldy by the standard of the day, and this war-hating king/emperor had never seen a day of peace in his life. He therefore wanted to ensure that the Hapsburgs who would inherit this could far more effectively govern it tha...
[ "I think this question is not exactly historical more economic. Imagine a similar situation, you buy a brand new car for £10,000. Eight years later you realise that it is no longer fit for use, and so try to sell it. Finding no buyers you scrap the clunker. Did £10,000 just disappear? No you got eight years of qual...
Why do Full HD/1080p PC monitors seem to display a better image than Full HD/1080p Televisions?
[ "While monitors and TVs can have the same resolution, TVs are usually much larger physically than a PC monitor. This means that monitors have the same number of pixels in a smaller space. This means that the pixels on a monitor are smaller/more densely packed, and so it is harder for your eyes to pick out individua...
[ "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 ...
Why do the roads look shiny when looking at them from far away? Almost like there is water on them.
[ "If you're referring to the effect you see on hot days, that's a mirage. The sun heats up the road, so air down low is hotter than air above. The speed light waves travel through air depends on temperature, so this gradual difference means the light curves as one side of the wave gets ahead of the other. So light f...
[ "Speculative, as I know of no scientific study on the subject, but I am an electronics technician and electronic warfare specialist who works with various radio and radar equipment. It's possible that the angle of your radio station relative to the freeway (and thus overpasses) is such that just as you go through t...
What happened after the rest of the Roman empire heard about Pompeii and Herculaneum?
[ "/u/mythoplokos provided an [excellent answer to this question a couple of weeks back](_URL_0_)." ]
[ "To add on to this question, how did non-European nations react, like nations in Latin America? I'm particularly interested if Japan or China had anything to say about it (since the Japanese had already been contacted by the US by Commodore Perry, and the US was trading with Qing China)." ]
What was life like for Native Americans during the American Civil War? Did life change amidst the chaos? Were they largely unaffected?
[ "How the Civil War affected Native Americans depended markedly on where they were: some were involved and others knew little of it (or enjoyed a period a lightened intrusion during the distraction provided to people who would have otherwise come West). But you may want to look at the National Historic Landmarks nom...
[ "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...
Time Before The Big Bang.
[ "We don't know. Whoever tells you otherwise is wrong. People often say that time is a property of this universe, ie. there is no \"before\" the big bang. That may or may not be the case. Big bang wasn't really \"something from nothing\" type of thing. Literally everything was already there, and now it's just spread...
[ "I recommend you repost this to /r/askscience. It's possible that an actual astrophysicist or someone with similar knowledge will give you a very credible answer there." ]
How does a city, e.g. Aspen, have 100% renewable energy?
[ "Most of Aspen's power comes from hydro, which doesn't fluctuate very much. And it's not like the wind ever dies down completely." ]
[ "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." ]
Exactly how extensive was Mesoamerican human sacrifice?
[ "Some areas do perform more sacrifice than others. My area of focus, highland Jalisco, doesn't appear to perform any human sacrifice during the Formative and Classic periods (I don't k ow enough of the Post Classic to comment). That outlook may change once more excavation, especially of households, is performed I w...
[ "In addition to the excellent posts above about the European and Islamic traditions, you may be interested in this conversation which looks at the methods of [North American and Aztec male hair removal](_URL_6_)." ]
How Amazon gets away with such bad treatment of its workforce in the United States
[ "The US has extremely lax labor laws for a developed country. Nothing Amazon is doing is illegal where they are doing it." ]
[ "1) PR move. You own this giant corporation, but you're in it for the little guy! (this is usually because of ... 2) You get your compensation in other ways that aren't taxed as heavily as direct income from salary." ]
How did Islam become such a seemingly violent religion when the majority of Muslims don't condone violence?
[ "It's really not. It's just you don't hear a news report about every time a Muslim or a primarily Muslim country doesn't do something bad. The amount of terrorists is a drop in the bucket to the amount of Muslims. To the extent that it's \"more likely\" that violent areas have more Islam going on, it's really just ...
[ "One thing to point out is the terrain. Iraq is in the populous parts of the country pretty flat, with a semi good road network across the country making it easy to move people around, and larger cities and towns to organize around. Afghanistan is some of the most inhospitable terrain on earth. With little nation...
Is it true that some US Marines mailed the skulls of dead Japanese soldiers that they had killed home to wives/fiancées/sweethearts?
[ "Yes. The desecration of Japanese war dead is something I touch on in [this post](_URL_0_) although the overall focus of the piece is much larger." ]
[ "In *[Plague, Fear, and Politics in San Francisco's Chinatown](_URL_0_)*, Risse provides the following in reference to practices and attitudes in China at the time: > Most villagers, however still practiced the instillation of a powder made from dried smallpox scabs. Instead of conferring immunity, this strategy o...
What is the Magna Carta? (Not the Jay-Z song)
[ "A document written by barons of England and King John in 1215, the predecessor of the Declaration of Independence. The barons felt that they were getting screwed by King John, who did unpopular things like levy taxes without consent. (Sound familiar?) This led to a small rebellion that ended with the Magna Carta a...
[ "As far as I know, it's not an actual better encryption, its the fact that Apple is not holding on to the key. So before the NSA could just secret court Apple and get your info. Now they can't do that because Apple literally doesn't have it." ]
why are processors getting smaller and smaller, even in larger devices like gaming consoles? why dont they use the same processing techniques to make larger chips while using the same amount of transistors etc, wouldnt that make it easier to cool or run faster without getting hotter?
[ "Actually, no. By making the circuits smaller, they require less electricity. Also, different parts of the circuit are closer together, so signals take less time to get from one component to another, which makes everything faster. On top of those concerns, you have economy of scale. Most companies desire the faste...
[ "The microwaves bounce off the inside of the walls of the oven until they are absorbed by something (ie food). With only one thing in the microwave, it'll absorb most of the microwaves. As you add more items, there's less bouncing as the added food absorbs the microwaves. A conventional oven heats food by raising t...
How our noses get "used" to a smell
[ "The brain is lazy. New smells can mean new danger or new food sources. But after enough exposure that clue is no longer important so the brain moves on to more pressing issues." ]
[ "It's about novelty. When it's new, we cherish it and want to take care of it. Novelty eventually becomes familiarity. We see this a lot with cars. That new car, the owner is so careful. At some point, however, it becomes OK to toss that empty Big Mac box in the back seat." ]
how most wild animals can run at incredible speeds for a long time whilst humans lose stamina quickly.
[ "Humans are actually much more energy efficient than most animals, partially because we are bipedal. However, since we don't have to chase our food anymore so most of us aren't in shape enough to chase down an animal. There is an interesting book on the native tribe in Mexico that regularly runs marathon distances...
[ "The foods one I can answer. We evolved to like high caloric foods because we needed the calories when we were struggling to survive. Thus fatty or sugary foods taste good to us because it used to be great to eat them. Well now it's too easy to overindulge and weve made processed foods that have way more fat or sug...
Why can't I lift myself?
[ "Every action has an equal and opposite reaction. If you pull up on your bootstraps with your hands, then your bootstraps pull down on your hands by the same amount. The net force on your body is zero." ]
[ "The easiest way to answer your question is to buy a double hook scale like [THIS](_URL_0_) ($20) and tow the truck with it. Do the same with various masses on the sled and you will have your answer. The amount of force to get the sled moving will probably be higher than to get the truck moving because it will lik...
Did Soviet women fight along side men in infantry battles during WW2?
[ "hi! check out these posts by /u/georgy_k_zhukov * [What were the roles and responsibilities of Women during WWII (Germany, USSR, etc.)](_URL_2_) * [Because Russian women played many vital roles on the Eastern Front in WWII, how did other Male soldiers treat them and view them?](_URL_1_) and a bit more in the FAQ ...
[ "I would like to pose a follow up question: Were stimulants like Pervertin (Methamphetamine) only common in the ranks of 'normal' soldiers, pilots, tank crews etc., or were they also used by high ranking officers?" ]
Why are children's clothes marketed by age rather than body measurements
[ "Because parents are generally the ones buying the clothes for kids and they generally don't know what the sizes are or keep up with it, especially considering how fast kids grow. But they can immediately pick up on the idea of \"Clothes for six-year-olds\" without a single measurement." ]
[ "Playboy is a household name. 0G Juggs isn't. One looks good on any modeling resume (not to mention the contacts), the other is kinda limited." ]
Why do people insist on putting themselves into groups w/ negative connotations (redditor, brony, etc), yet at the same time stereotyping is bad?
[ "Because every group has negative connotations. What political party do you side with? Filthy limp-wristed liberals or racist war-mongering conservatives? Don't tell you're a wishy-washy hippy 3rd party voter! Any group that exists can have negative connotations applied to it, so you put yourself in the groups you ...
[ "It's about novelty. When it's new, we cherish it and want to take care of it. Novelty eventually becomes familiarity. We see this a lot with cars. That new car, the owner is so careful. At some point, however, it becomes OK to toss that empty Big Mac box in the back seat." ]
Why does the Osprey use propellors instead of jets?
[ "[Spootykins has the right answer](_URL_0_). If your airplane is slower, it's more efficient to use props. If the airplane were faster, it would have been more efficient to use jets. Some other considerations mentioned in this thread, including [noise](_URL_4_) and [kicking up debris](_URL_0_), are correct but are ...
[ "This guy explains it very nicely: _URL_0_ Generally the idea of the hemi is good, but it is not very efficient when you design the layout of the valves and sparkplugs, and it is difficult to get a good compression in. Pent-roof is the way to go." ]
My dad is an old farmer, and he says that wherever a snow drift is during the winter, in the summer that spot will have a lot more nitrogen in it. How would this work chemically? And would snow capture bioavailable nitrogen?
[ "Quick quotes from 3 sources. An inch of snow contains ~ 7 milligrams of Nitrogen per square foot. An inch of snow deposits 0.3 kg of Nitrogen per acre. It is estimated that 2 to 12 pounds of Nitrogen are deposited per acre (annually) as a result of snow and rain. All of these source go on to say that the agricult...
[ "Application of an electric or magnetic field can significantly affect the freezing characteristics of water. A DC electric field will tend to induce ice nucleation at a lower degree of supercooling, and there is evidence to show that an AC electric field delays the onset of ice nucleation. Industrial research has ...
The Sunni and Shiite conflict
[ "Both Sunni and Shia Muslims agree that the Prophet Mohammed was the messenger of God on earth. However, they disagree about who took over from him when he died. Sunni Muslims believe that he did not pick a successor and that his father-in-law was rightfully elected. Shia muslims believe that Mohammed designated hi...
[ "Also a piggyback question, was there any change or restructuring in Shintoism or its beliefs during the Meiji Reformation or in Japan post-WWII?" ]
Why does China have so many bootlegs of movies, games, restaurants, etc?
[ "China is still catching up with on intellectual property (IP) laws and regulations to reflect international standards but IP enforcement remains one of the top concerns for international companies with operations in China. I believe counterfeiting and IP violations are becoming less of a concern though, for consum...
[ "These answers were largely true years ago, but not so much today. The large outlet shopping centers you see all over are not selling off quality, or outdated goods. The manufacturers make other specifically for the outlet markets, usually of slightly lower quality. Source: worked for Levi Strauss and they have doz...
Is the air coming out of the towers in coal power plants just water vapor? If so, where are the CO2 and other pollutants released?
[ "Don't have any sources but our environmental studies teacher told us that the pollutant cleaning process in coal burning plants and waste burning facilities is so efficient that if you burn pile of leaves in your backyard you breath much more pollutants than you would if you were sitting on the edge of power plant...
[ "During WWII, the US needed a lot of aluminum for building bomber and fighter planes. The process to refine aluminum from bauxite uses huge amounts of electricity. To generate enough electricity, dams were installed through a large part of the Tennessee Valley. Water flowing through the dams turns generators to pr...
Which society had the most well treated slaves?
[ "I don't know how strictly this was enforced but according to Jewish law, slaves must be freed after seven years and in the meantime must be treated as part of the family, taking part in religious rituals such as the paschal sacrifice. Additionally, when freed, the slaves had to be set up with some possessions, pos...
[ "This submission has been removed because it is [soapboxing](_URL_1_.), [promoting a political agenda, or moralizing](_URL_0_). We don't allow content that does these things because they are detrimental to unbiased and academic discussion of history." ]
how to solve inequalities in algebra.
[ "Start by rearranging like you would accross an \"=\" 640-40 > 2x + x Simplify: 600 > 3x Reduce 200 > x OR, alternatively, x < 200 The only thing to remember is that if you are dividing or multiplying by a negative, you also need to flip the direction of the inequality." ]
[ "I would check out It's Okay to Be Smart on youtube. They do a good episode on this (im bad at links)" ]
With enough pulley's could a single human be able to lift up an elephant?
[ "Yes. But, it's not work for free. Say you can only lift 20 pounds and an elephant weighs 10,000 pounds. You want to lift the elephant up 10 feet. With enough rope, you can set up a pulley system so that with a force of 20 pounds the elephant will move. The catch is that to move the elephant up 10 feet, you have t...
[ "You *can*, but you shouldn't. Why? Because without other cases, you don't know if your one case study is representative of the average, or if it's an outlier. You need those additional cases to get a better picture of what the situation is actually like. If you try to extrapolate from one, you might get a very dis...
How are new domain extensions (such as .tech, .xyz, ect) created?
[ "ICANN originally had domains for countries as well as the ones for organizations (com/org/net etc). Recently, though, ICANN opened it up and allowed anyone with too much money to register a top level domain." ]
[ "Basically they all start from the oil we pump out of the ground.All of these things are inside that oil. We then heat the oil in a large tube that has many different levels. As the oil heats up all the different parts become a gas at different temperatures and they settle in the level where the temperature is cool...
If you can get a Master's degree at a major university in "dance", why can't you get one in Kung Fu?
[ "You can, but you'll need to find a university that offers one. I've got a friend with an undergrad in physical education and a masters in martial arts instruction. I don't remember though where he got his Master's, but I think it was a smaller school." ]
[ "Because they would get sued. The legal system isn't like some kind of beep-boop robot that overlooks totally obvious loopholes. Any company that claimed \"No, we were really advertising the endorsement of Bill Gates, plumber, from Bumfuck, Nebraska.\" would get laughed out of court. As /u/Snewzie pointed out with ...
How bad was body odor throughout history?
[ "not discouraging any further contributions on this topic, but FYI, similar questions have been asked, so you 'll find some of the previous responses here: [Did everybody \"smell bad\" in the in the medieval period?](_URL_6_) [Is it safe to say that every single great person in history prior to, say, 1930, would, t...
[ "Very hard to judge because its so subjective a question. 'people from the 1500s', for example, is a wide sample. which class? from which country / area? gender? Perhaps interesting (although undoubtedly difficult) research to undertake would be to try and find signs of depression or other related mental illnesses ...
What's the science behind cuteness?
[ "Our perception of cute has to do with both our nurturing instinct and our survival instinct. Things are only cute when they pose no threat to us, so please believe me when I tell you that polar bears look much cuter from a distance. Cuteness is also closely tied to [Neoteny](_URL_0_) which is the relative level of...
[ "Radiolab does a really good job of explaining it like I'm 5: _URL_0_" ]
[US] Why is it that the shortage of doctors difficult to fix?
[ "As a student pursuing another degree after considering becoming a doctor I will offer my simple answer. Trying to become a doctor and complete medical school carries with it an extremely high risk of failure and requires that I dedicate all of my time to that goal to have a hope of success. Rather than potentiall...
[ "The business cycle. This is just how capitalism works--it goes from boom to bust and back. Actual hard answers are complicated bits of economics that are beyond an ELI5." ]