query stringlengths 20 300 | positive listlengths 1 1 | negative listlengths 1 1 |
|---|---|---|
Why don't executioners use the easy and painless lethal injection of overdosing someone on morphine? | [
"8th Amendment (in the US) prohibits, \"Cruel and unusual punishment.\" So that's a tricky when you are literally ending someone's life. But the blend of chemicals is supposed to simply put them to sleep, then stop their heart. That's really the most objective way to kill someone without cruelty. Getting them reall... | [
"Wildlife photographer here. They do it with long lenses, and weeks of squatting in cold, damp nature blinds, waiting for the right scene to happen in front of them. I cruise around Yellowstone for days at a time with a 600mm lens looking for critters. Or if you happen to be Walt Disney, you cheat. For the 1958 wil... |
Why is a telecom/ISP selling your usage information any worse than Reddit doing so? | [
"I don't have to go to reddit. If I want internet, I have to buy it from someone who is then going to sell my information"
] | [
"It just doesn't seem necessary for a non-destitute life, yet. Running water, electricity and gas were not utilities when we started this country. Give 'er some time. As with health insurance, the internet will someday be held as a necessity for a decent life."
] |
Why are sound waves sinusoidal? | [
"You can get any function (as long as you don't do crazy things like infinite numbers of discontinuities, and often even then) by adding together sine waves. Sometimes it's useful to consider something as a sum of sine waves. For example, with sound a sine wave will stimulate one receptor, so by looking at it as a ... | [
"Quite simply - volume isn't linear! It's measured in dB which is logarithmic."
] |
How can there be an infinite amount of oxygen in astronauts capsules? | [
"The oxygen isn't infinite, through chemistry the astronauts are able to reuse the same oxygen over and over again. This is done through the following cycle: 1. Astronaut inhales oxygen and exhales both CO2 and water vapor 2. CO2 is captured and \"scrubbed\" by carbon dioxide scrubbers which use chemical reactions ... | [
"Exposure to unfiltered sunlight and near-vacuum conditions, most likely. Conducting experiments on site would definitely pose a challenge though."
] |
how does dry cleaning work and why do certain clothes need it? | [
"A solvent, that's not water, is used to wash them. It used to be carbon tetracloride, but now it is a \"greener\" solvent with less harmful vapors. Some fabrics, like wool or silk, react badly to water."
] | [
"The disk is basically a bunch of empty blocks all in a row. When you get some data on your computer, these blocks fill up. Every file is made up of a bunch of blocks (the blocks are really small). When you delete a file from the middle of the stack, that bunch of blocks become empty. You computer doesn't want to w... |
If something is a temperature of absolute zero, does that mean the electrons around the proton have completely stopped? | [
"Atomic electrons are bound in quantum-mechanical orbitals which can't really be thought of as classical trajectories. In order to answer the question, interpreting it literally, you'd have to define exactly what you mean by \"motion\" of an atomic electron. Are they literally zipping around with well-defined traje... | [
"There’s a bunch of people in your tongue, and they have a weird name. They call themselves TRPM8, and they’re proteins. They specifically tell your tongue when it’s really really cold. Mint gums or candy have a chemical, called methonal, that tells them that they’re REALLY cold, and in turn, your tongue thinks yo... |
Why does this two-photon system have mass? | [
"Just in case this helps to make something click, try it with the c included. E^2 -p^(2)c^2 = m^(2)c^4 with p=0, we have E^2 = m^(2)c^(4) yielding E=mc^2 which you may find familiar."
] | [
"This is going to depend on how you want to define an organism. One could argue that they are the same, since they will share a vascular system and will exchange the products of photosynthesis between the two distinct tissues. I would argue that they are separate. They still retain individual sex organs and under t... |
Axes are recognized in pop culture as symbolical for Viking and Nordic warriors. But how unique were they to these civilizations as weapons, really? | [
"Absolutely not. Axes were very common all over the world. Notable Axes include the [Francisca](_URL_5_), the signature weapon of the [Franks](_URL_4_) that predates the Viking Age. The American [Tomahawk](_URL_2_, another throwing axe used by Native Americans developed before the arrival of Europeans. The [Sheph... | [
"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... |
Would fractional reserve banking work best in an economy where wealth is distributed evenly or an economy where the top 1% gain 95% percent of the yearly income? | [
"Hey guys! I know you watch CNBC religiously and you totally have a handle on this whole economics thing, but I would really appreciate it if we could let the experts tackle this one! Thank you!"
] | [
"\"Stochiometric\" is the ratio of air and fuel. Ideal stochiometric for a gasoline-powered car at sea level is 14.7:1, air:fuel. If you are running rich, there is more fuel in the ratio. The additional fuel can add carbon build-up, which can lead to predetonation issues and other things. If you are running lean,... |
Does moving water get colder? | [
"Moving water gets warmer. By mixing/agitating/moving water you're adding kinetic energy which eventually converts to heat when it stops moving. > I heard a long time ago that the ridges in water bottles were there to cool down water. No, they're there for structural support."
] | [
"Neat question! I found a good article on this: Taira et al, 2003: \"Deep and Bottom Currents in the Challenger Deep, Mariana Trench, Measured with Super-Deep Current Meters\" _URL_0_ At the bottom of the trench, they observe a flow of a few cm/s either eastward or westward, depending on tides, [inertial oscillatio... |
Why sexual prostitution is illegal | [
"While it is currently legal in my country, there are a lot of social problems surrounding prostitution. Whether these problems are made better, worse or unchanged by having legal prostitution is extremely complicated. Prostitutes often(not always of course) have drug problems or other psychological issues. I can s... | [
"Politics. It's an easy issue to use to paint your opponent as \"evil\" regardless of which side of the debate they are on."
] |
How does a car calculate its average speed? | [
"I don't know if this is how cars do it, but a common technique is a \"digital low-pass filter,\" which at it's simplest uses an equation like v_new = 0.9\\*v_old + 0.1\\*v_detected. This means that each time a speed value (v) is detected (likely many times per second), the saved value isn't set to the detected val... | [
"Google Android has a feature that sends location data to the google servers, even if you have GPS turned off. If you use a Google Android phone, you can actually view your own data if login to Google and goto this site: _URL_0_ What Google is doing is fetching all this data that is sent from all the Google Android... |
Why is it tough to sleep at night even when you're tired, but easy to fall back asleep in the morning when you've just had a good night's sleep? | [
"It has to do with your heart-rate. When you're going to bed after 16hrs without sleep your heart is probably still pumping blood around pretty quick. Especially if you've had coffee, an energy drink or some other form of caffeine to keep you awake. However when you wake up after having been asleep for a solid nigh... | [
"Well, your mouth is essentially a giant mega-city populated by all sorts of citizens in the form of bacteria. 24/7 they are working hard at their bacteria jobs, creating all sorts of chemicals and molecules in your mouth as a byproduct of existing. During the day you are actively washing away those byproducts by s... |
Do any historians defend historical materialism as a valid theoretical framework? | [
"When i was in grad school many profs talked about a \"theoretical tool kit\" in which one should be able to take the same data set and apply different theoretical lenses to understand the ways that arguments may be created. Historical materialism sure had its heyday in archaeology and other humanities, but the re... | [
"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 do chemicals meant to "protect" plants like capsaicin, caffeine, nicotene etc. end up having strange benefits when consumed by humans? | [
"Dosage and physiology. Effects on a 0.1 to 10 gram insect or 100 gram bird or lizard are vastly different to those on a 70kg human. Its the same reason that such a tiny proportion of drugs successfully tested on animals end up on prescription."
] | [
"Cats and dogs have been selectively bred to be good companions. Most animals find being petted extremely stressful and many would lash out if you tried. But those are poor traits for pets so we try to breed them out. There's an old Russian experiment with a fox farm that demonstrates this very nicely. At the farm ... |
Why do drugs such as marijuana and cocaine induce paranoia to some degree? | [
"They are *very* different drugs with utterly different modes of action. In the case of marijuana, which acts on the endogenous (body's own internal system of) cannabinoid receptors, people can experience changes in their thinking and perception which can lead to paranoia. Amphetamines are *much* more pernicious, ... | [
"Taxes... If the government had a way of guaranteeing that they would get their cut off the money being made then it would be legal."
] |
Has there been a noticeable increase in the growth rate of photosynthesising organisms due to human carbon emissions? | [
"I once thought that increasing CO2 would increase photosynthesis, which would in turn decrease CO2, giving us a nice balance. After taking a botany class, I realize that photosynthesis can't keep up with emissions, especially when you consider the affect of increasing heat. Photosynthesis slows with a minor increa... | [
"I wish I had a 5 year old that I could get to pronounce zooxanthellae :) Corals are like tiny farmers that farm tiny plants. Sometimes, the tiny plants can't survive because something happens that hurts the plants, and then both the plants and the coral farmers die. There are a lot of things that can hurt the ti... |
What would cause the irregular shape of comet ISON (C/2012 S1) in this Hubble image? | [
"**Edit: STSCI people have [posted an explanation](_URL_4_).** There's also a [youtube video](_URL_3_) which explains it around 1:45. The long and short of it is that Hubble was tracking background stars throughout those images, and its orbit around the Earth meant that the comet had noticeable parallax which cause... | [
"They used the patched conics method. With this you basically reduce the equation to a 2 body equation. You are orbiting the earth, then you are orbiting the sun, then you are orbiting jupiter, then you are orbiting the sun again, then saturn... Of course this like any other simplification is going to introduce er... |
If relaxed muscles absorb shock/force better than tense/clenched muscles, why does clenched muscle hurt less when you, for example, fall on your butt or get punched? | [
"Relaxed muscles aren't really absorbing force, they are allowing the force to move your body instead of absorbing it all at once. If a limb is pinned, the force can't go anywhere, relaxing won't do you much good. When you fall on your butt, it is essentially pinned, the force has nowhere to go. If your muscle is r... | [
"It's all about relativity. If the Hulk ran for a quarter mile, he'd only appear to be moving a few dozen widths of his body size. If a dragonfly then traveled the same distance and speed, it'd appear to be moving thousands of widths of its body size. So they cover the same distance but relative to their body size ... |
For lithium ion batteries, is it better to keep it fully charged or let it deplete and recharge? | [
"You should definitely do the former - keep it plugged in all the time. A good lithium ion charger will shut off charging and then just keep the battery in maintenance mode. Whereas cycling the cell will result in diminished capacity over time. This is a a good article on the subject. _URL_0_ This paragraph about h... | [
"The disk is basically a bunch of empty blocks all in a row. When you get some data on your computer, these blocks fill up. Every file is made up of a bunch of blocks (the blocks are really small). When you delete a file from the middle of the stack, that bunch of blocks become empty. You computer doesn't want to w... |
Why do some foods make you "bring it to a boil" only to immediately have you turn it down to a simmer? Why not just simmer it? | [
"Because that's how you can be sure that the water is the right temperature for simmering without having to measure. To simmer means to cook something at a temperature just below boiling, where bubbles are still forming but the water is not vaporizing. To get to that point, it's easiest to first go up to boiling an... | [
"The initial price is generally based on the exit value required by the investors. Depending on when you put your money in and what level of risk you assumed, you'll want a certain payout. You set the amount and price of the stock to get that payout. However, selling stock is really no different than selling anythi... |
What are the actual Muslim rules regarding pictures of the prophet Mohammed? | [
"Furthermore, none of their artwork is allowed to depict any thing that lives. If you see the detail work on any of their prayer rugs, or frescas, or illustrative prints, it is all geometric shapes or carefully crafted prayer stanzas in calligraphy. It's all very beautiful, but nothing that can be animal or insect,... | [
"I'm a journalist. I can tell you straight up : it's for audience. These videos create shock, which is the best hook television news has over the viewer. The whole ethics speech they'll give you about people having the right to see it is BS. Television is a business, news or not, sadly. This is even more true in th... |
why do acne scars always look deeper then they actually are? | [
"What you might be seeing is [post inflammatory hyperpigmentation](_URL_0_), which is when the skin becomes slightly darker at the site of an old injury, irritation, etc. The darker colour looks like a shadow, even if the skin is totally flat there."
] | [
"Angles my friend. Try taking a knife and sliding it across a piece of fruit like a razor, then try the same thing smashing it perpendicular. One won't do a damn thing, the other slices the fruit wide open."
] |
why do different historians say different people invented algebra. | [
"(1) Algebra wasn't invented like Edison invented the light-bulb, but rather is a method of logical thought/branch of Mathematics that has been developing for (arguably) thousands of years. (2) Since humanity cannot seem to agree on what happened last week, I think its fair to say that no one really knows who did w... | [
"Hi everyone. Since this is the kind of question that can attract non-expert responses, just a friendly reminder that all responses must comply with [sub rules](_URL_0_), and that [personal anecdotes](_URL_1_) are explicitly not permitted in /r/AskHistorians."
] |
When humans use water in any way, how efficient is the process? Does all the water we use eventually find its way back into the water cycle? | [
"Unless you're chemically reacting the water with something to break apart the hydrogen and oxygen, *all* water (100%) is recycled, and all of it finds its way back into the water cycle. We can also create water by combining hydrogen and oxygen, so if we ran the planet dry of water, that would mean we went out of o... | [
"the heat would require a heat source, electricity or natural gas. Some places may not have the infrastructure to handle that currently, so it would cost a hefty sum just to get that working, and a pretty penny to keep it working. Secondly you would need to collect the waste water, which again, would require infras... |
why does it seem like protests in America are far tamer and more useless than other coutries? | [
"We don't have nearly as much to protest about. Other countries protest over things that are killing people. We protest over not having enough money to buy a third iPad."
] | [
"Different TLDs follow different countries' rules. In both Sweden and the US, the government isn't allowed to arbitrarily seize domain names- they have to follow some procedure, probably involving the courts, to do so. Swedish law and legal procedure allowed the government to get an order to seize the .se domain. U... |
Why can a fly fly into my house through my cracked door with precision, but can't find the wide open exit when it's trying to leave? | [
"Outside there are hundreds of flies randomly bumping into your house from all angles. Eventually one of them will get into your house It then has to try to get out, except as a single fly it has much lower odds of getting out than a horde of flies has of getting a single fly in. Its not an equivalent issue"
] | [
"The video shows every step. The fish, crab, and eels, have millions of years of evolution where finding holes in the bank to hide in resulted in fewer deaths from predation. So they seek the holes. They seek dark holes with the scent of prey. Humans come along. They imitate the dark holes with bamboo. They put ou... |
how does an anorexic person see another anorexic person? | [
"I used to have anorexia, and was in ballet so I was used to seeing thin girls all the time. I never really thought about if they were using the same methods as I was to keep their ballet bodies in shape. I just saw thin girls all the time and wanted to be as thin as them. Now that I'm 10 years recovered, I've ope... | [
"Models are not about being attractive to the opposite sex...they are about making clothing look good. It is easier to make clothing look good on a thin frame."
] |
At what point during digestion does food become calories? | [
"Food does not \"become\" calories. A calorie is a measurement of the heat produced by burning a material. The nutrients, carbohydrates, etc., that we consume is absorbed in the small/large intestine, into the blood. She'd be malnourished if it was that serious. It would equate to a massive metabolism."
] | [
"You ever see those coin sorters that start with the small hole that a dime falls into and other coins go past, a bigger hole the nickel falls into, etc? The body works similar to that. The cells in your body bind to certain nutrients because they fit to their receptors. Anything that doesn't fit goes on by and mig... |
When something on our body hurts, why does holding it make it feel better? | [
"[Lateral Inhibition.](_URL_1_) Stimulating the nerves around the affected area actually reduces the sensation of pain."
] | [
"To let others around us know we are in danger. This tells them that we need help. It also alerts those around us of a potentially dangerous situation that they should be careful around."
] |
Why can my brain tell my arm to move up and down but can't tell my penis to stop having an erection at will? | [
"Moving your arm up and down involves contractions of skeletal muscle, which are voluntarily controlled. This is the normal muscle type that most people are familiar with. Erections however are caused by increased blood flow to the penis due to the dilation of blood vessels via smooth muscles which are involuntaril... | [
"Here is a great animation: _URL_0_ As you can see from the animation, the inner surface of the pen is grooved. The button has a \"holder\", which holds the pen shaft in place and slides back and forth on the grooves. The shaft has a complementary part that fits into the holder. The holder is designed such that the... |
What makes some powdered drink mixes dissolve so quickly? | [
"Starbucks instant coffee is a combination of: 1) Freeze-dried instant coffee, which is highly water-soluble and hydrates pretty much instantly, and; 2) Extremely finely-ground whole coffee, which is light enough to enter suspension. These allows the oil-soluble flavors that are normally missing in instant coffee t... | [
"[Here](_URL_0_)'s a great video by Steve Mould on Tom Scott's channel which explains it. Essentialy it's because the viscosity (thickness) of water changes at different temperatures, changing how it splashes as it's poured."
] |
How to visualise unpolarised light? | [
"One thing I would want to make clear, is the amplitude of light is the strength of the *electric field* rather than some *spatial* displacement. So whilst we like to show electromagnetic waves like waves on a string, they're different phenomena. When I visualise the polarisations of light, I imagine I'm looking at... | [
"You can't look at Benham's disk on a monitor and know what color you \"would\" see on the real thing, ironically enough for almost the exact same reason we see color there in the first place. With a real-world disk, we see colors because some of our eye's receptors fire faster or linger longer than others - So a r... |
Realistically, how dangerous is using a mobile phone on a plane? | [
"Aerospace systems engineer here, working on new Airbus airplane (A350) long-story short: last time I was on an airplane, I texted my friend during every stage of takeoff to see when he would stop receiving texts. (in my opinion, there's absolutely no risk of anything bad happening)"
] | [
"This is something I would also like to know as I listen to a lot of trade books in the car while travelling and have wondered if its ~~doing anything~~ actually planting the information into my head or I'm a just listening like a song."
] |
How do fish freeze above water, in various poses, or within water? | [
"I assume you're referring to this post? _URL_0_ If so, that doesn't happen naturally. Someone drilled a hole in the ice, took a fish and let the ice refreeze over its tail."
] | [
"One way is to look at air bubbles found in glaciers. Scientists are able to estimate when the ice was formed and the air trapped inside is exactly what the air was like when that part of the glacier formed. So by examining the composition of that air, they can make a pretty good guess to what the temperature was."... |
When and why did the mutual dislike between Muslims and Jew originate? | [
"I'm Israeli, and I think this has to do with the state of Israel being formed, and Arabs and/or Muslims treating it as an example of western imperialism on their own turf. Although, there are a couple of verses in the Quran about Jews and not all of them are positive. It's mentioned in the Quran that Muhammad's be... | [
"Hi, I've approved the post, but just a note to you and potential respondents: this subreddit has a 20-year rule against discussing current events, so any answers will have to cut off at 1997. If you're looking for answers that can include 1998-2012, do consider x-posting elsewhere, eg. a foreign affairs sub like /... |
Did the earliest Homo sapien have the same level of intelligence as humans today? | [
"That depends on how you want to define the 'earliest' humans. The patchiness of the archaeological record has given us smattering of skeletal remains spread over millions of years and thousands of kilometers. It's very easy to divide these individuals into groups and give them names like Homo sapiens sapiens, Homo... | [
"Your asking essentially the chicken or the egg. Example, Did you stomach evolove first and create your brain and extremites to feed it. Or did your brain grow your stomach to power it. Har to say, as without something to feed the stomach, we would have no stomch. Without the brain to run everything, we wouldn't ha... |
Why do children seem to have so much more energy than adults? | [
"Because life hasn't crushed the joy out of their little hearts yet."
] | [
"Dude, I typically experience the opposite, usually you're wiped out before making the trip back, and energized and active on the way there."
] |
When a big company buys another company, who actually gets the money? | [
"It depends on who owns the company being bought. If you're the sole proprietor of your business, and sell it, you get all of the money. But let's say someone wants to buy Facebook. There are hundreds of institutional and individual investors who own parts of that company. So, we have to deal with stock. Fundamenta... | [
"It's not practical or just. If you break my toy and I break yours then now we have two broken toys. A better approach is that if you break my toy then you replace it. Likewise, if you cut off my arm and I cut off yours then we're both screwed and I'm still down one arm. Better if you compensate me somehow than me ... |
How does cauterization work? | [
"It burns the open ends of the capillaries and veins closed to stop blood loss. There are multiple methods that can be used to do this \"burning\" such as heat, electricity, and chemistry."
] | [
"Here is a great video explaining it. _URL_0_"
] |
why do smoke detectors run on batteries? Wouldn't it be more convenient to wire it in like a light? | [
"The majority of smoke detectors I've owned were wired in to the houses electrical supply, and just use batteries as backup."
] | [
"Imagine a bathtub full of water, the water represents electricity. The bathtub has a faucet, which represents the generation of electricity. Imagine now that there are little holes in the bottom of the bathtub, all plugged up. When ever a home needs power, unplug the drain and let the water flow out. Now imagine ... |
Is there any reason why, in a car, the acceleration pedal is vertical while the brake pedal is horizontal | [
"It makes the brake pedal wider than the accelerator so that if you hit one by mistake, it's more likely to be the brake than the accelerator. It's a safety thing."
] | [
"Capillary action, and your legs have this giant artery called the Femoral Artery. As the blood moves through the leg and foot (that is uncovered) it is cooled by the outside air easier, and returned to the body a bit cooler. With the capillaries spread over the feet, and skin it gets more surface area to cooler ai... |
Why, if Salt is essentially addictive to eat, is Salt Water so non-consumable? | [
"Because salt water is way saltier than you realize. If you sucked down a salt-shaker full of salt you would not enjoy it. Anything, even vital nutrients, can be poisonous in too great an amount."
] | [
"Sugar tastes good. When faced with a choice between that which is smart and that which is pleasing, most people will spend their money on the latter. A business exists to sell people what they *want* to buy, not what some might feel they *should* buy."
] |
Why do your eyes tear up when laying on your side? | [
"I'm going to guess that because your tears are reabsorbed from the inner corner, when you're laying on your side gravity pulls the tears to the outer corner and they accumulate."
] | [
"Differing Alpha and Beta levels within the brain. Everyone is wired differently and most likely the time you go to bed affects the said levels. This also changes when you age as well. There's a japanese article that goes into detail about this but I can't find it"
] |
How did cultures mass produce coins before modern technology? | [
"Medieval mints managed to mass produce coins by division of labour, with specialists in assaying, melting and stamping the coins. In the 13th century, the London mint had eight dies, so there would have been eight production lines, and they were able to produce £3,000 in a week when required - which is 720,000 pen... | [
"Someone can correct me if I'm wrong, but I'd imagine they used what Chinese calligraphers used (brushes, ink stones, rice paper). Try [this](_URL_0_) link too. Hope that helps."
] |
I'm a coffee noob, what're the differences between these fancy coffee drinks? | [
"[Here is a diagram that shows the differences.]( _URL_0_) Edit: I was a barista for a few years so let me know if you have any other questions."
] | [
"Ask Reddit is for personal opinions, stories, and the like. Essentially subjective answers to questions without hard answers. Something like \"whats your favorite food\" is a good post there ELI5 is for getting a simplified answer or explanation to a question that you don't understand. A good thread here would som... |
How can we be absolutely certain that the amount of Universal energy remains constant (how can we prove the law of conservation of energy is valid in terms of the Universe)? | [
"The law of conservation of energy only applies to closed systems, which can be observed fairly easily on Earth. Conservation of energy is not known or even thought to apply to the universe as a whole because it isn't considered to be a closed system."
] | [
"To cool a house, you first must generate the electricity at a powerplant, the electricity is shipped to your house through wires, and then your air conditioner which is less than 100% efficient uses that electricity to cool the house. If you have electric heat, the first few steps are the same, but converting tha... |
Why are so many people allergic to penicillin? | [
"Some individuals who are treated for infectious mononucleosis with amoxicillin, penecillin, ampicillin, or tetracycline [have a hypersensitive response to the drug therapy](_URL_0_). The virus and antibiotic form a [hapten](_URL_1_)-carrier complex, allowing the production of antibodies and/or T cells specific for... | [
"\"Just about everyone here\" Where is \"here\" for you? It sounds like your question's premise is based on a small sample set based on personal observation. Before your question is addressed, you should be making sure the premise is valid..."
] |
Why cant the enamel on teeth be replaced? | [
"It is not \"can't\" just \"we haven't figured out how to do it yet.\" _URL_0_ We are also working on things like genes the govern tooth regrowth, so humans might eventually regrow a lost tooth. Sources: link + sister is a dentist and almost an orthodontist."
] | [
"YouTube started doing this a while ago, many people would pre-load minutes/hours of content without ever watching it, which is wasting YouTube's bandwidth. So, they now only stream video in segments, like 5-sec each. As for why the already played content isn't cached on your browser, these sites simply didn't allo... |
Why do some people make an incredibly loud vocal noise when they sneeze while others do not? | [
"I sneeze loudly because otherwise I get a stuffy nose People probably think im a douche They're right"
] | [
"Ok, just reading this post made me clear my throat. I'm genuinely curious and hope a psychologist or scientist will answer this :)"
] |
- Why do some computer programs let me alt+tab seamlessly to another application, and some will crash or even force me to reboot if I try to use alt+tab? | [
"Programs don't receive the command. Alt+Tab is a system interrupt command and is directly interpreted by the operating system without being passed to the programs. Certain full-screen only applications and may not like it much because they are not designed to run in the background, which can cause their graphics o... | [
"If you were to build a 'super' car, would it be the fastest? The car that uses the least fuel? The one that can carry the most cargo? The one with the most amounts of seats? The one that fits in every parking space because its small? Different people create different languages for different reasons. Some are supe... |
what's the point of Snapchat since anyone can just take a screenshot and keep what you shared with them? | [
"If you take a screen cap, it alerts the other user. Snap chat reduces the likelihood of pictures getting out, and gives you an early warning if they save it, but snap chat does NOT claim to be secure, nor is there any compelling evidence that it is. If there are pictures that you don't want people to have, don't u... | [
"This type of world is referred to as post-scarcity. We pay money for things because of scarcity. The crappy jobs are all automated, and the necessities for life are available with little to no effort. For example, you eat without needing a chef, a farmer, a truck driver (to transport), or any other third party to ... |
How do they make some new muscle/pony/sports cars sound like a carborated "gas guzzling" car, and what are the advantages/disadvantages to this modification? | [
"In some cases they intentionally reduce the efficiency of the muffler. In same cases, amazingly, they even add an actual speaker that plays a recorded fake engine noise inside the car. I wish I were joking."
] | [
"*Gain* is a technical term for the output of an amplifier. So if an amp has a gain of 1 then it puts out a signal at the same level as the input signal it receives. If it has a gain of 100 then it puts out a signal that is 100 times more intense than the input signal it receives. *Volume* is more of a casual ter... |
How accurate was Marx's theory of history? | [
"For a much quicker and less nuanced answer than thegeneralstrike's, do you mean specifically that history is a product of class struggle, and that human society progresses through the stages of primitive, ancient, feudal, and capitalist economies (and by \"human\" we mean \"European\")? That isn't really taken ver... | [
"This is such an incredibly vast question that I find it literally impossible to imagine your professor assigning it to you without something more specific in mind. As such, you should review the material from your class to look for your answer."
] |
How exactly does my pickle jar still smell vaguely of pickles after several trips through the washer? | [
"Basically the way soap works is that it forms molecular bonds with a lot of sticky and food type molecules. These bonds are generally stronger than the bonds between food and skin, or food and glass. Then when you introduce hot water to the situation you're adding energy, which is used by the molecules to jump fro... | [
"theres like a vibrator thingie inside, an electrical doodad that is like a small electric motor with like a weight attached to it, when the electricity activates the doodad the watchamacallit spins really fast and since its all wobbly it vibrates."
] |
How much longer does it take 2 (electrically neutral) masses to reach eachother gravitationally when they travel parallel at equal relativistic speeds? | [
"Your intuition is correct. To see this, note that we can transform to a frame in which they start out at rest, reducing it to the original problem. That frame is the rest frame of the system, and however long it takes them to collide in that frame is the amount of *proper time* it takes them to collide in any iner... | [
"The P=NP problem is basically asking \"Is it just as fast to solve a math problem as it is to check the answer?\" P and NP are a couple ways mathematicians talk about how fast certain kinds of math can be done. Some think these might be just as fast as each other, but they haven't managed to prove it one way or th... |
To the drag racing enthusiast, why does the car with the slower time win sometimes? | [
"It's called a holeshot win if the car with the fastest elapsed time does not cross the finish line first. If the reaction time to the green light is 0.00 seconds then it is a perfect reaction time, which means you left the stage beam at the exact time the light turned green. The timers don't start counting the ela... | [
"Basically to participate in those thing you have to raise some money. Either from other people or pay it out of your own pocket.Some of those money goes towards charity that even it held for. Then you run/walk to show that you participated, and contributed. Not sure if there prizes for the people who comes first."... |
If in a plane carrying 1000 birds , the birds start flying inside the cabin (all at once), will the plane weigh less? | [
"No the birds flap their wings this pushes the air down against the floor of the plane with the same force as if the bird was standing on it. [Mythbusters showed this with birds in a truck](_URL_0_)."
] | [
"Need more detail! Was the pilots voice being played *through* the speakers? If so, are your headphones wireless? Or did the headphones not cancel out the noise like you thought they should? Edit-- * If playing through the speakers, your headphones are wireless and the signal sounded fine: digital comm problem (im... |
How does crucifixion kill you? | [
"Asphyxiation was a common cause of death, as the body couldn't summon the strength to lift itself up to breathe."
] | [
"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."
] |
Do insects grow tired the same way as us? | [
"Insects certainly do get muscle fatigue. However, they are built to greatly resist fatigue. For a fly, they have evolved to fly for hours upon end, they can't get tired from just a short flight. The big difference relates to [respiration and circulation](_URL_0_). In humans this process is centrilized in our tors... | [
"Even while doing nothing your body is hard at work doing many things such as: *Fighting diseases (which your body has faced before) *Contracting Muscles (Eg. Pumping blood around the body) *Digesting food *Respirating (Processing Oxygen from breathing) *Creating Proteins for repairs *Conducting Mitosis (How Skin, ... |
Why do cops sometimes give out warnings rather than tickets, and why is it legal to do so? | [
"Cops aren't required to arrest everyone for every minor violation of the law. They're allowed to use their personal judgement for minor infractions, especially when there is no victim or material damage (ie - a speeding ticket). The purpose of the police is to create an ordered society & keep people safe, not thro... | [
"This is a very common question. You can use search to find [all the other really good answers](_URL_0_ ). This is instant, and faster than ust typing in your question every time. It's a way of cheating elections. Read the others, and then ask a more specific question."
] |
Auction Hunters, are those guys really lucky? or are Americans just that forgetful? | [
"it's a scripted tv show. the producer of the show puts stuff into storage units and the actors get to bid on them"
] | [
"Online tracking is easy. Whenever you click on an ad, it sets a cookie on your computer that marks you as arriving to that site from the ad. Your each activity on that site is tracked and noted when you make your purchase. Offline is a bit different. Depending on the size and marketing efforts of a company, they m... |
Is there a certain sequence of blocks in Tetris that, no matter how good the player is, will always result in a quick loss? | [
"You might be interested in [Can you win at TETRIS?](_URL_1_) The conclusion is: even if the machine only gives you \"S\" and \"Z\" pieces, it can give them to you in such a way that it forces you to stack them infinitely high, no matter how you play. I recommend reading the full article, it also considers many oth... | [
"Looking for patterns in large amounts of data. A well known case from a while back was this: retailers have a huge database of what customers bought. An analyst had this idea: You can tell when a woman has just had a baby because for instance she has started buying diapers. But is there anything in a woman's buyin... |
Did the majority of white collar employees in the 50s and 60s really stay at their first employer for their entire career? Or is it just a perception due to how often employees switch companies nowadays. | [
"When I started at my current employer of 12 years everybody who arrived there basically never left due to the good conditions and pension. Not long after they changed the policy for new hires and since then people come in and get trained then start looking for something else pretty quick. There is nothing keeping ... | [
"Often times the company subsidizes part of the initial costs in exchange for you signing a longer term contract. A classic example in the US at least is mobile phone contracts. AT & T will sell me a new iPhone for $200 if I agree to a 2 year contract. A new iPhone by itself costs at least $600. AT & T pays differe... |
Why do we tend to have a different name for countries than the native language's name? For example: we call it "Japan" in English but the Japanese word is "Nippon", or how the French call Germany "Allemagne" when it's "Deutschland" in German. | [
"[\"Names of Germany\" has its own Wikipedia article](_URL_0_). They are all historic, in this case named after different tribes that were present in today's Germany at some point. Once a name is established in a language (family), it tends to stay that way, but that happened at different times and for different re... | [
"Writing in Japanese using the English alphabet is called romaji. So what happens is you write the word in romaji on your keyboard, and the computer inserts the symbols. For example if you set microsoft word to Japanese and typed the word \"konbanwa\" it will revert it to the hirigana symbols. (I don't have the ful... |
Can I leave the car engine on while refueling? | [
"You shouldn't leave it running because there is a risk of lighting your car and yourself on fire if there's a spark (e.g. backfire). [Like this](_URL_0_)."
] | [
"It's not. Liquor stores often do as well. Businesses have to pay someone to run electronic transactions. Processing your credit card costs money, taking your cash doesn't. That's why many places have minimum amounts for credit - below $5 it may *cost* them money to sell you something. Gas stations do a lot of very... |
What are the modern explanations for how consciousness arose? | [
"There are none yet. It's a mystery. We're even discovering that some animals can communicate and think on a higher level than we initially thought."
] | [
"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."
] |
How does antimatter work? | [
"What is conserved is not strictly the mass but the total \"budget\" of mass and energy (since they are related). So when matter and antimatter collide they annihilate into a cascade of photons and other pair of particles, created by the usually huge (on the subatomic scale) release of energy."
] | [
"Do physicists think dark matter really exist or is it something they've made up temporarily to explain something they don't really understand?"
] |
Why is Japan so clean compared to places like the US and Mexico? | [
"I heard some Asian religions require you to be clean and respect everything around you. (It'd be cool if someone were to elaborate on this)"
] | [
"Do you wanna be in a country who isn't ready for the apocolypse or the zombie invasion?"
] |
Can someone please explain why it is that when I shoot a green laser pointer into a red medium (gelatin) that it is not visible? | [
"Red jell-o reflects & transmits only red light and frequencies near red light. Green is not near red so it gets absorbed. This is how things having color works :)"
] | [
"I had to consult his Nobel prize lecture to get some of the experimental details. It is well worth a read. _URL_0_ Lenard seems to have worked with electrons with energies around 30 keV (that is, accelerated by 30000 volts). Electrons of these energies will be fairly efficiently absorbed by materials on a length s... |
What is the real deal with Israel? And what is the biggest misconception about it? | [
"\"Europe\" did not decide to create Israel. Jewish Palestinians waged war against the British mandate at a time when Britain was exhausted and impoverished by WW II. The British were caught in a three-way insurrection (Jews vs Arabs, both vs Britain) while trying to limit Jewish immigration to Palestine in an atte... | [
"> how it really amounts to a bunch of bologna I don't have an answer, but I do need to point out that bologna = lunch meat. Baloney = nonsense."
] |
Do playing mind or strategy games like chess improve your IQ or brain performance? | [
"The majority of studies say no. Practiced cognitive skills in one domain, like arithmetic, don't bleed over to different domains like chess. IQ tests are designed to be as abstract as possible, so that they don't draw on any practiced skill. But they're not perfect. For one thing, you could practice and analyze a ... | [
"It depends on how your network is set up (both your and your isp in some cases) if you have a fancy router you can activate QOS (quality of service) and tell it to prioritize certain activities or ip addresses, for example in my network I have my ip phones set as priority 1, online gaming as 2, Netflix / Hulu as 3... |
Do non-human animals appreciate human music? | [
"Snowdon, Charles T., David Teie, and Megan Savage. \"Cats prefer species-appropriate music.\" Applied Animal Behaviour Science 166 (2015): 106-111.: _URL_1_ \"*Cats showed a significant preference for and interest in species-appropriate music compared with human music*\" [Wallace, Emma K., et al. \"An investigatio... | [
"Please use the search function. _URL_11_ _URL_12_ _URL_13_ _URL_11_ _URL_12_ _URL_11_ _URL_12_ _URL_13_ _URL_12_ _URL_13_ _URL_13_ TL;DR: Why is a bad question with no good answer. We can't tell entirely with other animals, because we can't directly communicate though anecdotally, many seem to."
] |
What would happen if all orbiting satellites went down? | [
"GPS and all satellite based navigation would go down. Lots of TV networks would go down. Satellite phones and a whole lot of military links would go down. In some remote areas, satellite is used for internet connections. The regular internet would work just fine, in general. Though there are actually some services... | [
"Point a flashlight at the wall and turn it on. See the small circle? Now, let's say your flashlight is delivering xyz power to the wall. So xyz power is landing in that circle, right? Tilt the flashlight in any direction. The circle spreads out across the wall doesn't it? But you didn't change the batteries or any... |
Why are I.Q. tests used as the primary standard for gauging intelligence? | [
"Fundamentally, IQ tests cover one main field: Logic. Whether they be mathematical questions, verbal questions, or spatial/pattern questions. Logic is really the foundation of all our learning and application of knowledge. IQ tests dont ask chemistry or history questions, b/c not everyone knows chemistry or history... | [
"Custom and practice. If you build it and it falls down, you do it again differently. When it works, you keep it like that. That, and people weren't stupid or uneducated - the Greeks were fairly capable mathematicians, as were the Egyptians"
] |
What is Gamer Gate and why is everyone so angry about it. | [
"I try to avoid Gamergate like the plague nowadays, but I feel the need to point out that all the men Zoe Quinn allegedly slept with never reviewed her game. The only one of these guys she was ever confirmed to be with was Nathan Grayson, and the only coverage Kotaku *ever* gave her game before this whole incident ... | [
"[**Search before submitting**, especially when asking about current events. The search box is in the upper righthand corner of the page.](_URL_0_)"
] |
Would I technically have to declare taxes on small transactions like lemonade stands? | [
"Depends on the specifics of the tax law wherever you live, but generally you'll have to declare all income as income, no matter where it comes from."
] | [
"How were you planning to get to your land? And how were you planning to keep it from being stolen? Streets, police and a whole lot more are paid for by property taxes -- including the public schools which are not, apparently, doing a great job of explaining government."
] |
When a fly or any flying insect lands on my flat screen tv; how come the on screen movements do not spook them, but they fly away as soon as I move towards them? | [
"I think they base their flight-instinct more on touch, and sense your approach through the disturbance in the air."
] | [
"I notice a lot of these natural selection questions are a lot easier to understand if you question the fate of the opposite, in this case the answer becomes clearer if you ask instead \"What happened to the living things that didn't try their best to produce offspring?\" Well they had fewer heirs and eventually di... |
What about mushrooms makes them so notoriously poisonous for people? | [
"There are numerous species of mushrooms, and many are perfectly safe to eat. However, there are a few exceptionally poisonous species which have given all mushrooms an ill reputation, especially since it can be difficult to distinguish between safe and toxic species. Poisonous mushrooms contain chemicals known as ... | [
"_URL_0_ Hallucinogens work by shutting down neurons that have the effect of calming other cells in the visual cortex (the bit of the brain that works out what you are seeing). So these cells start firing as if they are really dealing with real visual information. Human eyes are actually not that great and the bra... |
How is Uber a legal business if they don't have to follow regulations set in place for taxi drivers? | [
"The taxi companies would argue that they aren't a legal business. Uber would argue that they're not a taxi service, just a system that allows people to connect with each other for the sake of ride sharing. These arguments will wind up being settled in court."
] | [
"With some of those apps, they might have take care of underlying processes in the operating system that could be compromised by their removal. Additionally, Apple is somewhat dedicated to... I guess the best way to put it is give a consistent experience across devices. They feel that is a good way to reinforce th... |
Why did the ethnic Bosnians of the Handshcar Waffen-SS unit wait until they were back in Germany to desert? | [
"This is a shallow and non-specific answer, but many Axis units attempted to flee as far west as they could before disbanding or surrendering. Being captured by the Soviets in the East could mean summary execution, or a slow wasting death in the gulags. Although your safety wasn't guaranteed in the West, you had mu... | [
"Could you perhaps present us with your original source so we can see what the author writes about it? I *think* I know the answer, but I would like to know what exactly the author wrote. Also, could you remove the bonus question? We do not allow discussions of events after 1993."
] |
I've heard a lot that you have a "new" body every seven years. If that is the case, how do tattoos and bad scars last an entire lifetime? | [
"Tattoos are ink trapped between 2 skin layers where no repairs around it move it much. Scars and bone fractures replace broken parts with different harder structures that are persistent and replaceable by the same. The \"Ship of Theseus\" paradox of defining, if a completely repaired ship with 100% exchanged parts... | [
"Well, think of it like a car. The individual parts of a car mean nothing. Every bolt, nut, belt and fuel serve a purpose altogether. Sure you can run it without a few things, but it will wear and tear faster. A car is alive with fuel cycling through the system via combustion and the energy from the battery provi... |
Is it possible that mass graves from WW2 are still undiscovered? | [
"Absolutely. Not only is it likely, I would go so far as to suggest that it is a near certainty that there are still unknown mass graves stretching across large swaths of Central and Eastern Europe that date from the Second World War. As a matter of fact, there have been [several](_URL_0_) ... [mass](_URL_2_) ... ... | [
"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... |
Did Joan of Arc actually fight or was she only a symbol? | [
"While you wait for a specific answer, /u/sunagainstgold expertly answered [A lot of pictures depict Joan of Arc clad in armor holding a sword, but did she actually have any considerable military training?](_URL_1_) /u/TheGreenReaper7 answered [Was Joan of Arc ever in hand-to-hand combat, or was she only commanding... | [
"[The Fordham Internet History Sourcebooks](_URL_1_) are pretty much go-to in terms of finding major/commonly-assigned primary documents in simple text format. The faculty in my department use Fordham docs a ton in assigning readings. I use the [Public Records Office of Northern Ireland](_URL_0_) online selection, ... |
why are sloths so slow? | [
"Because they evolved to be. For the sloth, being slow is an advantage. Because they are slow, predators rarely spot them. Because they are slow, they burn very little energy. As a result of that, they can get by eating food that isn't very high in energy and therefore is eaten by few other animals. So slow leads t... | [
"The Earth is big, and it takes a long time to warm up. Temperature lags behind energy input."
] |
Out of all birds, why did humans made the chicken staple diet ? Why not goose, sparrow, eagle, crow, duck or anything else? | [
"We want birds that are easy to keep, breed relatively quickly, give plenty of palatable meat, etc. But chicken is not the only bird kept for its meat; goose, duck, pheasant, quail, and dove are all raised for their flesh. Eagles would be difficult to handle and not worthwhile to feed; crows don't have much meat an... | [
"A pyramid is the easiest type of building to make. Any group of people who want to make a large structure are always going to start with a pyramid. Staircases are always going to take more work. So, if you want to walk to the top you will always make one section a stair case which is always going to be straight up... |
Big Bang temperature and density. | [
"There are no such things as \"pure\" energy, much like there are no such thing as \"pure\" mass. Particles can have properties such as mass or energy, and a bulk of particles with high (thermal) energy has a high temperature."
] | [
"There is no point of origin, the BB happened everywhere at once. With the expansion of the universe as it is, observers at every point would measure their surroundings receding in exactly the same way."
] |
How often do opportunities for Mars-to-Earth Hohmann transfers happen? | [
"A Hohmann transfer is technically between two circular orbits, which isn't entirely appropriate for Earth and Mars which both have elliptical orbits around the sun. If we approximate the Earth and Mars' orbits with circular ones, it should be clear that the number of transfer windows is the same because there has ... | [
"They plan the landing sites well in advanced. It is determined by terrain (will it be a safe landing), different features (what looks interesting to study), and by past landings (they want to spread out so they can study as much ground as possible)"
] |
Why do sites like Google and Amazon need domain specific urls (_URL_1_ _URL_0_) instead of .com always? Is it simply a language thing? | [
"It's an organizational choice they make. Their company has different set of inventory, shipping logistics, payment processors, and other logistics separated by region. They decided to divide their company traffic up among different domains to help group the regional logistics systems better. Another reason could ... | [
"Each of them has a special meaning on the command line, so if they showed up in filenames they would lead to ambiguity. \\ is the path element separator on Windows and / is both the path separator on Unix-style systems and the normal command switch character. : is the character that indicates a drive name as well ... |
why dont acids and bases melt through the containers they are kept in? is there an acid/base that could potentially be so strong it melts through everything and just finds its way to the center of the earth? | [
"For the container, they are kept in nonreactive things, like glass. As far as the strength to melt to the center of the earth, in theory yes. You would just need lots of it no matter how strong it is. It also may need some help getting through water tables. If you mix 14 and 0 yes it becomes 7. But that doesn’t no... | [
"Looking at the phase diagram for [water](_URL_0_), at 0 deg. C water has to be compressed to 632 MPa for it to change phase from liquid water to solid Ice VI. This won't be exactly the same for salt water, but it's a good point of reference. Assuming water to be incompressible while liquid (not strictly true, but ... |
How do liquid filled capsules not melt the capsule they are in? | [
"Generally, capsules are made of gelatin which is effectively scrambled dehydrated protein. This is soluble in aqueous solutions and degraded by proteolysis. The internal contents are usually not water soluble or has been made into a colloidal gel that is saturated with gelatin-like material which prevents further... | [
"They did a few years back. It was called Olestra, and it was supposed to change the way we eat (or so they claimed). Basically, the stuff was a fat-substitute that the body simply wasn't able to absorb or digest, so it was just passed through the body. Unfortunately, a problem arose with the stuff because you were... |
Why are air conditioner temperature settings so inaccurate? | [
"You might have one of those thermostats that operates with a metal coil. The metal contracts/expands depending on temperature, triggering the AC to cool or heat the room. Now, if the coil has been over extended repeatedly the tension in the coil gets weird and it starts to contract/expand differently than what it ... | [
"It is hard to start a motor, it would take a long long time to start on low. Going 0 3 2 1 let's the fan start on High which gets it up to speed in a timely manner"
] |
Is commonly acknowledged that trains were largely responsible for formalizing and synchronizing time keeping in the United States, but what was responsible for doing so on a global scale and when did this occur? | [
"The adoption of the Greenwich Meridian as the Prime Meridian was decided by an international conference held in Washington DC in 1884. It was basically the least bad option, because most charts already used Greenwich, and most trade used time based on it. [one source](_URL_0_)"
] | [
"I know Air travel and contrail contribution to cloud clover definitely changes surface temperature in cities. In the 3 day stand down of (almost) all air traffic in the days following the 9/11 attacks, there were measurable decreases in surface temperature . I can only assume the effect would contribute in other m... |
Why are we supposed to bury our poop after pooping in the wilderness. | [
"Its not that its more dangerous people just aren't all that fond of stepping in their own waste."
] | [
"This is like asking \"why does a fire burn itself out - what's the point of using up all the fuel if it can't sustain itself?\"."
] |
How come there is not a large mixed Native American and European population in the United States | [
"The simple answer is the kinds of colonization practiced in the colonies. The Spanish practiced exploitation colonization, which was mostly young men seeking their fortune in a new world; while the English practiced Settlement colonization, which encouraged families immigrating and settling the land. The Spanish s... | [
"Because laws are enacted by elected representatives who want to keep their jobs. What you're describing would be *wildly* unpopular."
] |
Suppose I suffer a non life threatening wound (like suppose I get stabbed thought the hand in a fight) and I live in London in AD1000. What are my odds of dying of an infection? Do I have better or worse odds of getting a than a country dweller in the same circumstance? | [
"In a related question, what are the odds of surviving being stabbed in the belly and falling into the river which runs through a major city in the same time period?"
] | [
"What's the probability of flipping two coins and they both turn up heads? That's pretty easy to calculate, it's 25%. But what if you flipped one already, and it was heads? Now the probability of both being heads is 50%, it's just down to the second coin flip. That's the idea behind conditional probability, you hav... |
Computer processor. How do I compare dualcore to quadcore? For example, is 2GHz dualcore equivalent to 1GHz quadcore? | [
"Simple analogy: think of a core like a lane on a highway, and think of the clock speed as the speed limit. Two cores would mean there are two lanes on the highway. Now, let's define a couple of systems. * System A: single core, 1 GHz (30mph, one lane) * System B: dual core, 1 GHz (30 mph, two lanes) * System C: s... | [
"There is a reason. Specifically the grammar of PIE (the earliest ancestor language of modern English that we have a fair working knowledge of) marked interrogatives (words like who, what, when etc) with a prefix that sounded like 'kw'. (I'm no linguist, but I suppose this is kind of like the way English marks ques... |
Why are there so many people with nut allergies? | [
"I'm not so sure that there are that many. I think the issue is that if you're one of the few who have it, depending on the severity, even breathing air with peanut dust can make you die."
] | [
"\"Just about everyone here\" Where is \"here\" for you? It sounds like your question's premise is based on a small sample set based on personal observation. Before your question is addressed, you should be making sure the premise is valid..."
] |
Is there an evolutionary (or any other scientific) explanation for our affinity for music and/or dancing? | [
"[This critique](_URL_0_) (PDF) of the book \"The Singing Neanderthals\" seems to have a serious discussion on the topic. Now I'm out of time, but I hope later to summarize it for you. For now, I think it's important to note that Darwin in his book \"Descent of Man\" has already speculated on the subject: > \"When... | [
"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 discoveries/inventions would be necessary to make teleportation a reality? | [
"It depends on what you mean by \"teleportation\". If you mean making a rough 3D copy of the shape of an object at a far away location, this technology exists. You just need a 3D scanner, a network connection, and a 3D printer. This is done in rapid prototyping (such as in the lab I work at) if you want to quickly ... | [
"Watch this video by Veritasium: _URL_1_ I think it answers your questions."
] |
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