query stringlengths 20 300 | positive listlengths 1 1 | negative listlengths 1 1 |
|---|---|---|
What is it that actually transfers light in a perfect vacuum? | [
"You've actually captured the of the idea behind [Aether theories](_URL_0_). People thought that electromagnetic waves needed a medium to pass through, and they called it the Aether. (In an interesting historical side note, in the 1800's many physics buildings were built without the use of nails or screws, because ... | [
"I'll answer the OP since no one else is. Assume we're in space and we are looking perpendicular to the plane of the spinning beam. We'd see a partly transparent disc, getting less transparent as you got closer to the center. The disc would sparkle the most on the outside, as each atom that collides with the beam i... |
Why do CRT TVs emit a high pitched sound while they're turned on? | [
"What you hear is something called the [flyback transformer](_URL_0_), it \"rings\" as current passes through it. With standard definition TVs (NTSC)this ringing is at a frequency of 15,734 Hz. This frequency is close to the top of the standard human hearing range."
] | [
"You've got a tube that connects your inner ear to your throat called a Eustachian tube. Normally this tube is pretty much open, except for a 'door' on the throat end to keep stuff out. When you've got a cold, the tube can get infected and it gets swollen, so even if the 'door' opens it can't equalize pressure bet... |
Close your eyes. Gently prod the part of your eye closest to your nose. Can someone please explain the 'black dot' that appears? | [
"Your finger is poking your eyeball on one side, putting pressure on your retinal nerves. Your retinal nerves get confused and pass signals to the brain that are interpreted as light. Light passing through the lens of the eye is mirrored so that an incoming image appears upside down and backward on the retina. The ... | [
"That's because of the [Moire pattern](_URL_0_) produced. Moire patterns are produced when you overlay two patterns that are very similar, with a small amount of displacement or rotation. In this case, the two patterns are the pixel density of the picture and the pixel density of the computer/TV in the picture. Bot... |
Why is there such a vast temperature difference in the desert between day and night? | [
"The desert has little to no moisture or humidity in the air. Moisture in the air allows the air to hold onto heat better because water has a very high specific heat (which is basically how much change in energy is required for a change in temperature). When it goes from day to night time, the moisture in the air f... | [
"Two social psychological concepts come to mind here. State dependent memory encoding and Erickson Arousal theory of learning. State dependent learning states that what ever state of mind you are in during encoding is the state of mind where recall would be optimal. Erickson arousal theory states that learning is m... |
What writing system did early Britons use? | [
"In short, we don't know. We only have a tiny handful of examples of Brythonic writing, and these take the form of 'curse tablets' found at the Roman temple-bath complex to Sulis-Minerva at Bath Spa in Somerset. These are written in the Latin alphabet and engraved in the same manner as the other tablets."
] | [
"EDIT: Removed a large chunk of my answer. Thanks, shlin28, for correcting my knowlege on the status of Roman N. Africa prior to the Muslim expansion. Around 1100, a tribal confederation known as the *Bani Hilal*- numbering some 200,000 men, women and children in all- moved from the Arabian Peninsula to Egyptian an... |
Do star positions change over time and is it possible to find out how the sky looked from a specific spot and that particular period in time? | [
"Star positions themselves, might have changed slightly due to their own movement, but most of the change would come from movement of the Earth. We are rotating around our own axis, we are rotating around the Sun and our axis itself wobbles over centuries. With some basic geometry, we can predict how skies looked l... | [
"Soooo many things. Temperature, current water AND salt levels in your body, your diet (not just week-to-week, but also day-to-day, and sometimes meal-to-meal), hormones, exercise, current and previous health routines, sleep patterns, and the consistency of all of these factors. If you want to start having more \"g... |
Why are offences against children deemed much worse than a crime against an adult? | [
"Because people usually figure that it is a lot harder for a child to defend himself/herself as opposed to a adult, which may or may not be true. Also, if there is any mental/physical trauma, the child will sometimes have a far harder time coping with it, and a longer time also."
] | [
"Your rat's brain is more developed at this point. Humans have huge brains that need a lot of time to develop, and due to our narrow birth canals, we also have to be born fairly underdeveloped compared to other animals. Your two year old's brain is not yet in a stage where it can make the sort of long term connecti... |
Why do you feel like throwing up after lifting a lot of weight or when you push your body physically? | [
"WEAKNESS LEAVING THE BODY PUSSY!! no, jk Its the \"fight or flight\" response you may have heard about in school. Your body just went through a trauma of being pushed pretty hard so your bodies response is \"oh shit, im about to fuckin die. I better eject all this preworkout and protein semen shake so I dont have... | [
"When reading a book, normally, the book doesn't move very much relative to your eyes. Sure, the car might bump up and down, turn, accelerate and so on, but you usually hold the book fairly still - again, relative to your eyes. When reading, you usually focus only on the text - which you see as stationary. Your eye... |
Why do I get completely blind when I suddenly get up after resting for a long time? | [
"You could be mildly dehydrated. Or you might have orthostatic hypotension (a.k.a. postural hypotension), which occurs when blood rushes to your feet and away from your head as you stand up suddenly. (People with low blood pressure can be especially prone to this phenomenon.)"
] | [
"There are a few factors at work here : Moſt chairs are deſigned to ſit at about knee height ; they generally ſupport your back, and more importantly, your butt and legs. Toilets are uſually lower, and they are made with a large hole in the middle, into which you ſink a little. This lower height, lack of ſupport,... |
If ice is less dense than water, wouldn't melting ice bergs and similar floating ice masses actually lower the sea level? | [
"Much of the polar ice rests on land formations, not suspended in the ocean by buoyancy."
] | [
"RMS Titanic is not just a shipwreck: it's a resting place for dozens, if not hundreds, of passengers that went down with the ship. Doing anything to the Titanic at this point is equivalent to messing with a grave. RMS Titanic has been preserved in many ways: books, television shows, movies, etc. Artifacts from the... |
Could Curiosity (or some other Mars lander) 'populate' Mars with life? | [
"There is almost certainly life on Mars. Life that we sent there. We know for a fact that some organisms are capable of surviving the rigors of space (hard vacuum, radiation) because they've been found on spacecraft that have returned from the Moon. The issue is that they can only survive that way in a [spore state... | [
"It's controlled remotely. There is a delay but that's fine. We just send the instructions to the rover, along with when to start performing it's actions. The message gets there at some point and then the rover follows the instructions and reports back afterward on what happened. It's like playing game of chess by... |
XIV century black plague | [
"Not to discourage further answers, but u/mikedash wrote what's probably the most comprehensive published treatment on this question awhile back -- you can [find the thread here](_URL_0_), but feel free to ask follow-up questions in this thread."
] | [
"I would recommend Valentin V. Sedov. Slavs in the Early Middle Ages, but I am not sure if it is available in English."
] |
What does it mean to say life is carbon-based? Are we literally made out of carbon? Could life exist based from another element? | [
"Most of our DNA and cell structure is carbon, yes. In each molecule of bio-material, a majority of what you are is carbon by weight. And yes, it is a theory that life could also exist based on other elements like silicon because it creates the same number of bonds in a molecule as carbon does, and so it would beha... | [
"Oxygen levels were probably slightly higher 500 years ago. There's good direct measurements for the past 25 years showing a decline in oxygen levels. _URL_1_ Indirect ice core measurements of oxygen levels going back a million years show indicate higher levels of oxygen then. _URL_0_ These differences are easily m... |
Why do so many otherwise great TV shows struggle to end their stories well? What is it about the creative/production process that makes this so difficult? | [
"Simply put, it's easier to tell a 2 hour story than what amounts to an 80 hour story. With a 2 hour movie you spent 20 minutes introducing your characters, build your story a little and then spend 20 minutes ending it. If you've got 65 hours story building, it would feel very cheap to spend 20 minutes on ending it... | [
"It's completely cultural. Some languages are tonal, which means that a word's tone is an inherent part of its pronunciation. If you change the tone from a falling one to a rising tone, you've mispronounced it and have likely said a different word entirely. In Mandarin questions are indicated by adding the word \"m... |
Brown Hair, Red Beard. Why??? | [
"To be frank, I don't have a great answer for you, but I can summarize my response to a [similar question](_URL_0_) as part of this [previous thread](_URL_1_). So what I remember of hair color genetics is that there are several genes involved in the pigmentation of (head) hair color, at least two if not more. Hair ... | [
"It is down to the combination of the genes you get half the genes from your mother and half from your father but those genes are an almost random selection of those genes which go to make up each so can be combined in trillions of different ways. Like saying you get half a pack of cards from one parent and half fr... |
How is it that crows can be as intelligent as a 7 year old kid, but their brains are so much smaller? What is the correlation of brain size to intelligence? | [
"Crows can do some things as well as a 7 year old child, not all things. They certainly can't control a child-sized body with the broad spectrum eyes that a child has. They can't control the complex vocal mechanisms like a child can. They can do about as well on some types of intelligence tests, that's far from doi... | [
"Just because a book has more pages doesn’t mean it’s a better book. Chromosomes in different species do a lot of different things, and some are more or less efficient, some specialized and some not. The number of individual chromosomes (out of context of a species) is unrelated to pretty much anything"
] |
I've read lots of links but I still can't understand why money laundering even exists as a concept. Maybe ELI4.9? | [
"A lot of the time they explain their money needed for the business as something illegitimate, but still reasonable, Walter White in Breaking Bad explained his as gambling winnings. Which while not 100% legitimate, is legal and explainable."
] | [
"There is a block with 10 lemonade stands, they all do pretty good business. One day, Big Ass Mega Lemonade opens. The original 10 go out of business and the former owners get jobs working for BAML. Those 10 owners make a lot less money - and the owner of BAML, who happens to live far away, takes all that money an... |
Is it possible to build a telescope/microscope? Magnify a distant image and at the same time magnify "microscopicly" the same object? | [
"The optics are different. Telescopes focus on light that is essentially coming in parallel. Microscopes focus on things where light is coming conically from a single point."
] | [
"Everything on board the ship will experience time to behave normally. You can not experience your own time dilation, and neither can the camera. You can also say that you are in fact stationary and experiencing no time dilation, and it is the solar system that is moving relative to the ship, since there is no abso... |
Why do objects that are wet look shiny? | [
"Water fills in all the tiny dents and cracks in a hard, rough surface and creates a smoother, more reflective surface. Both surfaces reflect, but the uneven dry surface just bounces light around randomly instead of creating a clear reflection."
] | [
"Wifi and cellular systems use microwave radiation (like your microwave oven, except far far less power). Microwave radiation rips absorbed quite readily by polar molecules like water and fats. (this is how microwave ovens cook food, imparting the energy of microwave radiation into kinetic energy of water and fat m... |
How does using a small amount of toothpaste remove scratches? | [
"It is simply that toothpaste contains a small amount of abrasive. It's meant to rub micro gunk off your teeth, like sandpaper would, but it can also rub off the edges of scratches, making them much less visible."
] | [
"Nobody knows why or even if it works, but that and variations of it are common practise in many countries. Cultural memes are like that, they spread, even if they don't have any real function."
] |
How and why does lead stop radiation? Why not any other elements? | [
"Every elements stop radiation. Lead is not special. Even just air and water stop radiation. The difference is just density. Usually, denser materials are better at stopping radiation, given the same thickness. So either you have very thick wall made of concrete, or thinner wall made of very dense material. So why ... | [
"Red meats have a much higher concentration of myoglobin, a protein that makes red meats look \"redder.\" Myoglobin is similar to hemoglobin, the protein that makes your blood red and both proteins also contain iron. Myoglobin and hemoglobin are used to store oxygen, one of the vital compounds needed for our body t... |
Why does pancretic cancer have such a high mortality rate, when the pancreas isn't as important as the lungs or heart? | [
"Pancreatic cancer is very hard to diagnose early. Generally by the time symptoms start to show; weight loss, abdominal pain and jaundice the tumour is already quite large and has spread to other areas. If the option to operate is still viable, the surgeons generally leave a small section of the pancreas behind, t... | [
"Popularity. Lincoln, a very famous president, is remembered as being a great leader. His image is everywhere in the United States and the civil war is taught pretty uniformly throughout the United States. JFK is still in living memory for most people and JFK was a very charismatic president. By contrast McKinley ... |
Did the ancient and classical civilizations know more about their predecessors than we know about those predecessors today? | [
"Follow-up question. In the case of the Etruscans: are any Romans known to have been concerned about the impending extinction of the Etruscan language? Did any Roman historians focus their efforts to attempt to preserve Etruscan history or language for later generations?"
] | [
"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_... |
In the years after WWII the US was the only nuclear power, how did this affect their foreign policy? | [
"The US was far more liberal in discussing the deployment of nuclear weapons. Once the US monopoly was over, and there was concern over nukes being used against itself you see a shift to viewing them as a weapon of last resort."
] | [
"One thing is it was a great excuse to work on military technology without looking like you're working on military technology. A lot of the stuff that puts a man on the moon also puts a nuke in Moscow"
] |
What were average university grades in American colleges in the 1930s? | [
"I research assessment in higher education and I'm not a historian. I'm just commenting to flag changes in assessment thinking over the past decade or so towards criterion referenced assessment and away from curve based assessment. Your question seems to be focused on relative rank, in other words, if your grandfat... | [
"azdac7. What an amazing response! Super informative, sources cited, and overall just \"A+\" material. Thank you!"
] |
Why does it take so long for kids to differentiate between right and left? | [
"It's fundamentally confusing for some people, because the body is left-right symmetric, and to some degree so is the world. Things to your left are much like things to your right. And your left hand strongly resembles your right hand. By contrast: things up in the sky are very different from things down on the gr... | [
"My LI5 explanation - You work out where you are and how you are moving from both your eyes, and the motion detection organs in your ears. When you are in a car, your eyes see the device in front of you, and it does not appear to be moving. But your ears pick up all the movement of the car. So your eyes are saying... |
How does elevation affect the pressure inside a soccer ball? | [
"Do you mean layman's terms? The figure that matters is *relative* air pressure - how much higher is the air pressure inside the football than the air pressure outside, and the gauges used to measure ball pressure should already be measuring that. You should just be able to pump up the ball, and then test it with ... | [
"How are you going to pressurize the inside of a popcorn kernel with a bicycle pump?"
] |
What happened to older servants in the 19th century? Did they just get thrown out or did they get pensions? | [
"Are you interested in a particular country or region? I suspect the answer to your question may vary quite a bit based on location."
] | [
"Depends on your definition of loyal, and the very end - but, if we take 476 CE (with the deposition of Romulus by Odoacer), the provinces 'he' ruled over directly were composed of Italy, some of southern gaul, and parts of the balkans. Additionally, there was the domain of soissons, which was a rump state within G... |
Why weren't the leaders of the Confederacy charged with treason after the US Civil War? | [
"I asked [this very question](_URL_0_) several months ago, and got some answers from /u/ReadySettGo and /u/rittermeister, among others. The short version is that such actions were practically unthinkable at the time, as they would have compromised a fragile peace and made any sort of political reconciliation imposs... | [
"Simple: Their music doesn't act as a confession. Music is a performance, you wouldn't arrest an actor for being a murderer just because they play one in a movie would you? Similarly you wouldn't arrest Eric Clapton for admitting he shot the sheriff, and you can't arrest a rapper for saying they are \"ridin' dirty\... |
Australian Politics - Upcoming election | [
"Regarding the whole voting business, I would strongly recommend making sure you've read and understood this comic: _URL_2_"
] | [
"I don't know why this got the orange LABOR banner. :/ If somebody can please tell me how to edit it, I gladly will. Sorry."
] |
How come phones (iPhones) in particular lose charge at odd rates? | [
"Charge memory. It is very much not an exclusivly iPhone issue. It is a lithium-ion battery issue. Li-on is the best to date battery for the way smart phones are used, but hardly anyone takes care of the battery in a healthy way. Anyway, if you always plug in your phone to charge at 30% life remaining, eventually i... | [
"Standards for data presentation have changed. If you attemted to load a site as it were when 3g was in its prime, it would load wonderfully. The problem is that as wireless data capabilities have increased, so has the complexity and amount of data in sites to make good use of it, to the point where the outdated tr... |
Is there any historical evidence of any bastards or illegitimate children of royalty taking an English throne? | [
"Well William the Bastard became William the Conqueror after he defeated Harold at the Battle of Hastings and took the English throne."
] | [
"Asked recently on /r/askscience here: [How many people would you need to self-sufficiently populate a planet without inbreeding being a problem?](_URL_0_) Pitciarn islands makes a nice case study in humans. Pitcairn Islands were [settled by 6 men and 11 women](_URL_2_); and the majority of inhabitants are their d... |
If a person is able to take a shot or tablet of ATP would they get a boost of energy? | [
"If a person were able to take a shot or tablet of ATP it would not give them an energy boost. Because of the net negative charge of ATP, it is not able to efficiently cross a cellular membrane."
] | [
"They generally have a ton of caffeine and other things that are real, actual stimulants. Many also have a bunch of sugar that, at least in the short term, will pep you up. However, from personal experience, they usually taste like crap and are way more expensive/mg of caffeine than most other sources like coffee."... |
Does alcohol in a drink evaporate? If left long enough, would said drink contain no alcohol at all? | [
"Yes, alcohol does evaporate. And it evaporates faster than water, so over time a drink would become less alcoholic. Eventually the difference in alcohol percentage would increase, but the total amount of alcohol and water would decrease, so it wouldn't really be that noticeable anyway."
] | [
"Barrels breathe. They expand and contract with temperature changes, drawing the spirits into the wood and then pushing them out again. They also allow in a small amount of air that filters through the wood. The interaction of the spirit with the wood, the char on the barrel, and the air is what ages it. Once it's ... |
Why are glue sticks round? | [
"Ease of twisting the screw which pushes the glue out, with a square one you would have to twist it 1/4 turn at a time. Also, I think that when you accidentally glue the cap on, you can't just twist a square cap to break it loose again"
] | [
"Easier for machines to fill them that way instead of having to add another step of mixing, and the fruit probably settles during packaging and transport anyways."
] |
How different are we physiologically from humans ten thousand years ago? | [
"By 8000 BC, people were already spread out across the globe. People were living in Central America. You can take descendants of those people from Central America and they can have children with people from Southern Africa whose ancestors never left that region since the dawn of mankind. Those children can be as he... | [
"Our intelligence. Tool making and fashioning weapons and traps seems to be our best bet."
] |
If we need UV-blocking sunglasses/sunblock to protect ourselves from the sun, why wouldn't leaving a clear bottle of water in the sun sterilize the water? | [
"It does. The SODIS method is a way to use clear 2-liter bottles and sunlight to make water safe(r) to drink, very useful in third world countries."
] | [
"Boiling it kills pretty much all the bacteria in it. That's how pasteurization works. Every time you boil it you basically reset the clock until it spoils (though toxins produced by the bacteria generally are not destroyed by boiling, so it's not safe to keep doing this forever)."
] |
Why is it the cradles of mankind are generally dry, arid deserts? | [
"[Satellite photo of the Nile and its delta.](_URL_0_)"
] | [
"You may consider asking this question in /r/askscience or possibly /r/AskAnthropology if you don't get an answer here. It seems like your question and potential answers may be cross-disciplinary."
] |
Is China still a communist country? | [
"Not by the general definition of communism. The Government structure is very central to the one party and all laws and rules are based on communist philosophy, while the economic structure is not. Basically economy is driven by a very active trade system, while people living within the country are bound by the ver... | [
"Follow-Up question: Were the Great Leap Forward and Four Pests Campaign disastrous?"
] |
Why cant we learn in our sleep? | [
"The part of your brain that processes language is... asleep. The part which stores memories is also mostly not working. The brain can't learn when it isn't doing those things."
] | [
"Because it already takes too much time to teach you how to pass the tests that determine the schools funding."
] |
Has there ever been a "primitive" society that didn't have any religion/superstitious beliefs? | [
"I would challenge anyone to identify any society - regardless of the period or its nature* - that did not have both religion and what might be called \"superstitious beliefs.\" (*) we don't normally speak of \"primitive societies\" since it implies that there is some \"ascent toward better, advanced societies,\" ... | [
"Every species has evolved a reproduction strategy. For example, salmon lay thousands of eggs, with the hope that a few hundred will hatch, of that, maybe a hundred will survive long enough to make it to the ocean, and perhaps one or two will return to spawn again. On the other hand primates will only give birth t... |
What is the space time continuum? | [
"There are three dimensions of space: Length, width, and height. There's one dimension of time. Physicists weave these four dimensions together into the continuum because you can't really experience one without the other."
] | [
"A heaping load of pseudo-philosophical BS designed to keep viewers tuning in in the hopes that they might actually get some resolution to the mysteries the writers put in the show."
] |
When did the seven days of the week become synchronized across the entire world? | [
"What exactly do you mean by \"synchronized\"? There still are other calendars (e.g. Islamic, Jewish, Persian) and they are used not only for religious purposes. Also, even in Gregorian calendar some countries have weekend on Friday-Saturday or even Thursday-Friday."
] | [
"You may be interested in some of the earlier answers and journal papers linked in this recent thread (there's one anthropological paper that's particularly interesting re. chronotypes): (_URL_1_) by u/whattthefat and myself. u/sunagainstgold on how [muezzins and medieval monks woke up](_URL_0_) There are also a... |
Is it possible that the laws of physics would be different in a different galaxy or are they completely universal? | [
"It's a fundamental axiom of physics -- any good physics should apply everywhere in the universe. If that axiom is found to be violated, the theory is thrown out."
] | [
"This is essentially what radio telescopes do. Obviously it's not the same technology as with optical photography. The top few images [here](_URL_2_) are the Milky Way at different radio frequencies."
] |
Why is it that youtube has "full" music albums of many artists and stays there forever, but if I use an artist's song on my video it gets turned down for "copyright infringement" ? | [
"The real answer is that it depends on the work. The owner of the copyright can choose if your videon is taken down or stays up and ads will appear on your video to their benefit. If the full album hasn't been modified to avoid the copyright scanners it's likely that the profit from the video is going to the copyri... | [
"I don't want to get into information that will allow you to do illegal stuff, not what eli5 is for, but I'll tell you this. It saves the files in a specific location on your phone, for most android devices its all in the same place, and its accessible with pretty much any file browsing app. It isn't really hidden ... |
How come patented things say "patent pending" on them? | [
"That means they have applied for a patent, but it hasn't been granted yet, so they don't have a patent number to list."
] | [
"Because if the movie came out immediately, then no one would see it in theaters and movie theaters won’t bother to show a movie no one is going to see."
] |
Why do some smells (e.g. manure or mint) clear a stuffy nose? | [
"Mint and menthol are sensed in the body by special sensory receptors (cold receptors, TRPM8) very much like how spicy food taste spicy (TRPV1). Wasabi produces a similar effect but it's due to the noxious chemical/extreme cold receptor TRPA1. You have those receptors in your mouth and nose (and eyes). Those recept... | [
"Someone correct me if I am wrong but it goes back to when we had much hairier bodies and when alarmed we as well as a lot of other mammals would puff up our hair to make ourselves look bigger. Think of how when you scare a dog or a cat it hunches up and its hair stands on end, same thing happens to us just we dont... |
What makes ethanol corrosive to engines? | [
"[Susceptibility of aluminum alloys to corrosion in simulated fuel blends containing ethanol](_URL_0_) * Aluminum is susceptible to rapid corrosion rates in dry ethanol blended fuels. * Water concentration and temperature were found to be the principal drivers. * Higher ethanol concentrations result in faster corr... | [
"MADD lobbied it through the Congress a few decades back."
] |
What causes some adults to be attracted to children? | [
"Note that there is a different word based on which age range you're talking about, but reality is never black and white. Media pushes women to look younger. Sexual attraction to someone like \"little\" lupe Fuentes who was of age during the beginning of her porn career skew the line even more. Also, as I've read ... | [
"Uranium is a [lithophile](_URL_0_) element, which means it tends to associate with the light elements that make up the crust. This is a result of the chemistry of uranium, and doesn't really have anything to do with its mass. Silver, cadmium, and mercury in contrast are chalcophile elements, meaning they tend to o... |
How am I able to pass gas without having an accident? | [
"The lower intestines is the part of the digestive system where moisture is removed from the waste material as much as possible, in order to conserve the valuable resource. As it is mostly dry it tends to be solid and won't move even if a little gas is allowed to pass beside it."
] | [
"It seems to come as a surprise to my dog, every time he farts the noise spooks him. Also do you go sit on the toilet or go outside every time you fart?"
] |
How does this plastic surgery net thing work? | [
"I found [this article](_URL_0_) which explains that scar tissue has a different collagenous matrix than regular skin. Whereas scar tissue has collagen fibers that are arranged longitudinally, normal skin has fibers that are arranged in a \"basket weave\". This net that you speak of is possibly a \"scaffolding\" of... | [
"I've always wondered this too. I know for sure they get money from the ads on their page because of the amount of viewers coming in each day. I've also heard that its by the number of views per video or total subscribers. That I'm not to sure about tho."
] |
How is inflation in the US so low that the Fed is worried about it when the costs of healthcare, education, and housing are increasing so much? | [
"Because those are elements that included in the CPI calculations, but are weighted and also taken across all regions of the country. So if you are in San Francisco, your housing costs may be going up much faster than say Detroit and it would be a weighted average of both that are included in the final number. The ... | [
"The burger has a lot of heavily subsidized ingredients. It depends heavily on things like corn and soy for the beef feed, which is federally subsidized, besides filler and ingredients for the bun and corn syrup for the ketchup. The salad has no subsidized ingredients."
] |
why is "Rx" used for "prescription?" | [
"Because of its latin roots, Rx means recipe: to take."
] | [
"Back in the early 20th century. Kids would make nicknames for each other by changing the first letter. Will - > Bill Rick - > Dick Rob - > Bob"
] |
What would happen if light moved at twice the speed? | [
"Speed of light is not dependent on light itself like you might think. Our universe is just built so that the maximum speed limit for information is _c_, which massless particles (such as photons) invariably travel at. Changing _c_ would fundamentally change how everything in our universe works. There's no telling ... | [
"The statistical effect is not that dramatic, because you are doubling your chances of winning, but not really halving your chances to lose. Say that there are ten tickets for a lottery. If I buy one ticket, I have a 1/10 chance to win. If I buy two tickets, I have a 1/5 chance to win. That's twice the chance to w... |
How do antidepressants work? | [
"Nerves in the nervous system use chemicals called neurotransmitters to talk to other nerves. A positive mood is partly determined by a neurotransmitter called serotonin. One nerve will release serotonin which will bind to a receptor on another nerve, leading to the feeling of well being. Eventually the serotonin w... | [
"Hey, I made a quick [video](_URL_4_) to answer your video! If you don't want to watch the video here's what I run over: - Sometimes our thoughts wander, leading us to a thought that we may see as sad or depressing! This can be done subconsciously and without us knowing! - Stimuli can affect our mood, for example: ... |
If computers generate the CAPTCHAs, why can't they decode them? | [
"This isn't an exact answer to your question, but there's something called an Inverse Problem, where one process is much more difficult than the opposite. A simple example is squaring and square rooting. With a pencil and paper, find 432^2 , and then independently, find the square root of 186624. Another example is... | [
"Have you ever those reCaptcha tests that ask you to select the squares with street signs in them? They are used to help teach self driving cars how to identify what is and isn't a street sign. Edit: CPG Grey does a video about it - _URL_0_"
] |
If you're not supposed to eat before surgery, what happens when emergency surgeries are performed on people who have recently eaten? | [
"you can't eat before surgery because if there is food in your stomach and you could throw up from the tubes they put down your throat to put you to sleep and stuff. then if you throw up while asleep its quite possible to choke on it. in an emergency surgery situation its deemed that the risk is \"worth it\" becaus... | [
"> If I know I'm going to be taxed, why go out and spend more money to be taxed less? Wouldn't it just be redundant? If you spend money, you get something for it. If you get taxed, the money is gone. If the government was gonna tax my $1 unless I spent it, I could spend it on a hot dog, and now I'm down one dollar ... |
What is the knapsack problem and what exactly is its use? | [
"Ok, I'm not a computer scientist, so I can't tell you how it's useful, but I can break the problem down. It's best to do it by example I think: I have a bag that will contain at most 10kg. I have a sack of Blue balls, each weighing 1kg. I have a sack of Red balls, each weighing 3kg. I have a sack of Green Balls, e... | [
"Any time you've held off on buying something because you know it's on sale elsewhere (or that it will be on sale next week), that's game theory right there. Just as one example."
] |
Relative to today's standards, how smart were people in Roman and Greek times? Both famous philosophers and the average citizen. | [
"This is highly dependent on the definition of intelligence used. Due to the nature of the concept of intelligence it's impossible to give an objective answer."
] | [
"In addition to [Pompeiian graffiti](_URL_1_) and other [epigraphy](_URL_3_), much of which was quite crude, we also have the books for a number of comedic plays by [Plautus](_URL_4_) and [Terence](_URL_0_) and satirical poems by [Horace](_URL_5_) and [Juvenal](_URL_2_). And what were they like? Much like humor in ... |
What would it have been like to drive from New York City to Los Angeles before the Interstate Highway System was built? | [
"Do you have a particular time period in mind? The first recorded automobile trip across the country took place in 1903, but there were a number of cross-country road projects between then and the Interstate system in the 1950s, such as the Lincoln Highway and the US Numbered Highway System (Routes): _URL_0_"
] | [
"This has essentially been answered by the preceding comments, but what hasn't been contributed is this: _URL_0_. Muster and enrollment records, transfer lists, honours lists, etc, for the period of 1730 through 1898. Worth having, OP, if you're writing or researching the topic academically. To succinctly summarise... |
Why does cyclooctane have a higher boiling point than octane? | [
"The ring shape allows for a larger area of contact than the points of contact between non-cyclic octane. More contact means stronger van der Waals forces between molecules, increasing boiling point."
] | [
"You need pressurized containers that are more dangerous in case of collision/puncture in an accident. Because it needs to be pressurized you need to keep the tank cylindrical or spherical which greatly limits packaging options. I'm pretty sure that for the same range you'd also need a larger tank."
] |
Why can't the cellular infrastructure that is in place to provide 3G and LTE just be used to create a giant WiFi network? | [
"WiFi is not the same thing as a cellular network. This seems to be a common misconception, when I tell people that I have wireless broadband, because I can't get a landline, many people respond \"oh, so you got wifi\". WiFi use 2.4 GHz radio waves, cellular networks use many different frequencies, from ~700 MHz u... | [
"Building is often done in bulk, dozens of houses at a time, which means you get economies of scale, not just in the materials etc, but in the laying on of services. Building a row of houses needs a trench dug for the sewer connections, for example, but you can do the whole row at one time - likewise the foundation... |
How does water printing work? | [
"When the object is pushed through the film, it pulls the rest down with it, and it doesnt want to go down so it wraps around the object and sticks to it."
] | [
"Most games like this use a light gun (_URL_0_) with a diode which receives light from the display to sense where the gun is pointed. Essentially, when you pull the trigger the screen goes black for a moment except the areas with ducks in them, which turn white. If the diode in the gun is aimed at the white light, ... |
Given the current atmospheric conditions on Mars, how feasible would it be to setup a smelting operation to smelt the iron-oxide prevalent in the soil into useful products like iron and steel? | [
"You would need a reducing agent; on Earth, we use \"coke,\" coal with the volatiles cooked off. If coal were to be discovered on Mars, it would be the biggest science news in my lifetime since it would be not only useful but proof of widespread life at some point. It would be possible to do this, instead, using so... | [
"As far as recovery, we have been doing this for thousands of years via [smelting](_URL_0_)"
] |
What is an Ultrapixel? | [
"Generally in camera's you want as much area as possible on your camera sensor. The larger the area, the more light you can capture. In most smartphones from 2013 the pixels are about 1.1µm pixels (13 megapixel sensors) while the smartphones from 2012 have about 1.4µm pixels (8 megapixels). HTC however decided to g... | [
"The \"Pixel\" takedown notice has nothing to do with patent trolls. That was DMCA abuse. Both DMCA abuse and Patent trolls have been fairly significant issues for several years."
] |
Why is Chicago so violent compared to other major U.S. cities? | [
"It's not. Chicago is the 24th most dangerous city in the US, according to [this list](_URL_0_). The number of crimes that happen in Chicago is high because Chicago is the 3rd largest city in the country. However, when you adjust for population there are many cities that are far more dangerous."
] | [
"You did not read it correctly. The article only refers to one section of Krakow in this way. It really was designed to be a sort of ideal city. _URL_0_"
] |
If I have a pot that is too big for one hot plate on a stove as it is too small for another, which is the most effective to heat it on? | [
"As far as efficiency goes, you'd want to use the undersized heating element. If you use the larger heating element a decent portion of the energy supplied by the stove goes into heating the air around the exposed portion of the element which will likely be carried away by convection currents (or drafts) and do lit... | [
"The change came with the meeting between Nixon and Mao. Reading up on that meeting might be a place to start. The relationship between China (PRC) and Taiwan (ROC) is interesting. Both governments consider them to be one country. As long as the exiled-government-of-China-which-resides-in-Taiwan continued (and cont... |
Friday Free-for-All | July 06, 2018 | [
"We'll be helping with an AMA on Monday for Dr Hannah Newton, alternately known as @17thCenturyMum on Twitter. She's just published the first book devoted to the history of recovery from illness, Misery to Mirth, and is an expert on the histories of medicine, emotion, and childhood, particularly early modern Englan... | [
"Search bar over there ====== > Gets asked about once a week. This isn't a complaint, just a PSA about using the search bar before you ask a question."
] |
Does all matter annihilate all antimatter? | [
"To be clear, elementary particles eliminate elementary anti particles. Antihydrogen eliminates hydrogen because they have the same number of proton-antiprotons and electron-positrons."
] | [
"Fermions can't occupy the same *state*, which is not necessarily the same thing as the same *space*. For example, if I have one fermion at rest, and another fermion flys through the same point at some speed, that's allowed, because even though they are in the same location they have different velocities. Similarly... |
Can you contract cancer? | [
"Generally cancer cannot be contracted, but there are exceptions. These are called clonally transmissible cancers. There is a transmissible cancer that is currently in the process of killing off all Tasmanian devils called Devil facial tumour disease. Dogs can be affected by a sexually transmissible cancer called C... | [
"You have probably been lucky, and not been exposed to as many contagious people. Do you have much contact with children?"
] |
Roman History Study/Reference guides and timelines. | [
"I've always been a fan of The Penguin Historical Atlas of Ancient Rome. It has a lot of beautiful maps and provides some text for context. It covers from founding til Justinian I. It isn't the best if you are primarily interested in Late Antique Rome, but otherwise it is great. Link: _URL_0_"
] | [
"You're in luck! [This subreddit has a fantastic booklist with a section devoted to many aspects of the Second World War.](_URL_0_) If there is anything specific you're looking for, we'll be happy to try and steer you towards that perfect book."
] |
Working Definition: Nation | [
"As /u/callalilly77 noted most people actually associate the word \"nation\" with the concept of a \"nation-state\". A nation-state is a distinctly _political_ entity - in that it consists of a government that rules over a defined geographical area that is confirmed and respected by other nation-states by internat... | [
"traditionally .com was commercial. .org was non profit or some other organization. .net was network related site. .edu was educational. .gov was government website. some of these are reserved like .edu .gov but the others are fair game today. and they are coming up with increasing numbers of top level domain name... |
What would happen if you just took a commercial plane and drive it straight up into the atmosphere trying to reach space? | [
"If you actually tried to fly it straight up, it would stall. If you tried to fly at the maximum rate of ascent, eventually the air would get too ~~think~~ thin for the engines to work, or for the angle of attack on the wings to have much of an effect, so you'd be effectively limited to a certain altitude (what tha... | [
"Not enough energy to. It's like lighting a match in a snow storm and expecting it to melt everything. Sure, the match is hot, but theres a lot more cold than there is hot."
] |
The "Jurassic Park" method of controlling gender | [
"1. That book and the movie contained a lot of bad science. 2. A lot of animals are gender fluid. 3. It appears that on some animals (such as the frogs used in the book) the gender specific genes are present on both sets of chromosomes. So XX can be either male or female as needed, but so can XY. 4. Not all animals... | [
"This might be worth crossposting to /r/AskScience for their input on the genetics side of things."
] |
What caused the Enron scandal and what were the consequences? | [
"In a nutshell, the company used creative accounting measures to use the chance of future profitability to provide cash immediately. The best example is the building of various power plants, which would take years of construction. However, they could immediately offset the cost by booking future profits, thereby se... | [
"You have a lemonade stand. You sell it for 50 cents a cup. One day you find out it's going to be very hot outside and people are going to want more lemonade. You figure you can get away with selling it for a little more since the demand is there. So you start charging 80 cents. You notice that the number of people... |
"At near-light speed, we could travel to other star systems within a human lifetime, but when we arrived, everyone on earth would be long dead." At what speed does this scenario start to be a problem? How fast can we travel through space before years in the ship start to look like decades on earth? | [
"It follow the formula for the Lorentz factor, which is 1/sqrt(1-v^(2)/c^(2)). At 86% the speed of light, you age one year for every two years on Earth, at 99% the speed of light you age one year for every seven years on Earth. edit: I have to go now so stop asking me about warp drives!"
] | [
"You're going .99c, 1 mile per hour, and are also stationary. All of the above, and more. The problem is \"space\" doesn't have a rest frame. Velocity only makes sense *in comparison to some other object.* We forget this, or never learn it, because almost always in our daily lives, when we measure speed there is a... |
Why is laundry lint almost always greyish blue? | [
"All of the individual colors of the clothes that are in there mix up and make a darkish mess, just like if you mixed a bunch of paint colors together. Sometimes if something is shedding a lot of fibers, like a towel, or if you have a lot of similarly colored clothes, then that can influence the color of the lint.... | [
"Analog TVs had a circuit called the [\"color killer\"](_URL_0_). It was designed to eliminate any color from the screen when B+W programming was being received. The B+W signal did not have a [color burst](_URL_1_) reference signal, and it is the absence of this color burst which triggers the color killer. Static m... |
How are cities going to handle phasing out taxi medallions? Some people have invested millions in medallions and medallions help the city control the number of cab drivers on the road. Will they simply lose all their money? | [
"Buying a medallion is an investment (and a good one for awhile because cities have been inflating the value through artificial scarcity) and no investment is guaranteed. If you bought a medallion, you assumed the risk that the investment would be a poor one."
] | [
"A male lion's primary role in the pride is to protect the pride from lions not within the pride, and from any animal that threatens the pride. The mane helps to protect the throat and shoulders from attacks from rivals and the like. They only have it there so as to not overheat. They have also found that it has a... |
Are we undergoing a revival of the Arts and Crafts movement? | [
"This question is ringing some 20-year-rule bells in my ears, so, to clarify, is your actual question something more like \"How comparable are the 'hipster' movement of today and the earlier Arts and Crafts movement?\" Because a \"revival\" implies that there is a conscious act of reviving an art movement on the pa... | [
"1) *IS* there an increase in peanut allergies in the US, or is it just more public awareness?"
] |
When weather cancels 2800 flights, and 50k people are displaced, how to they all get back on schedule since so many of the flights for the next few days are already booked up? | [
"When 50K people can't get home due to cancellations, that means about 50K never left home due to cancellations. A lot of those people are going to cancel their trips, or reschedule them a ways into the future. Their seats become available to help the stranded get home."
] | [
"Those shows are not filming everyday like you might think. My family had one season on TV. The film crew would come into town for a weekend and they would give a very strict itinerary for the events. Many events and different places for each day they were in town. My family would have to bring a completely differe... |
How are we able to see through glass and other solid transparent objects? | [
"Some materials don't interact with light at certain wavelength ranges. Those materials that don't interact with light between 390-700nm we humans call transparent because our eyes see that range. However water is not transparent at other wavelength ranges, it blocks. other wavelength of light, like radio waves, a... | [
"You can't. It's called confirmation bias, where you pay more attention to those instances that confirm your belief than those that don't. Times when you've thought someone was staring and nobody was are not of interest, so disconfirming evidence is weighted less in your mind. It's a very well understood cognitive ... |
Why are older Cubans so set against opening up of diplomatic relations between the US and Cuba? | [
"They got run out of their home country by the current governemnt. Cuba and it's government stand to gain a LOT more than the US from normalizing relations and opening up trade. They want this oppressive government to fail so that they can have an opportunity to reclaim their country. There is probably a lot of lin... | [
"Greetings everyone. In the few minutes this sub has been up, it's attracting sub-standard responses. Just a reminder of a few of the rules: * no responses covering events/conditions post-1994, per this sub's \"20-year rule\" prohibiting discussion of current events * no anecdotes * no speculation OP: your question... |
Why do some old or tall buildings have black stains on the exterior near the top? | [
"Where I'm from it happens to a lot of older buildings made of Limestone. It's acid from rain slowly reacting with the Calcite in the Limestone. Here's a site that explains it: _URL_0_ If it's the same building materials there, then that would explain it. If not, then I have no idea."
] | [
"You ever read about the Star-Bellied Sneetches? When the non-star bellied sneetches went through the star-on machine, the star-bellied sneetches paid even more to go through a star-*off* machine to sustain their difference (and thus, their superiority). If you make cheap cars look like expensive cars, people will ... |
How does a spider know to bite you, and that you are not just an inanimate object? | [
"You generally don't get bitten by a spider unless it feels threatened by you. It won't just walk along and bite you while you are sleeping and immobile. People are large warm objects that move about, so they are clearly not part of the world or background. Spiders are a lot like snakes in regard to what they bite,... | [
"How do you know a year has passed without looking at a calendar? I imagine they sense the temperature/climate changes like anything else."
] |
How does a knife work on a molecular level? | [
"It doesn't. Knives work on the micrometer level, either tearing out tiny chunks of the material, like a saw, or forcing themselves into, and then forcing open, gaps in it, like a wedge. Those chunks that are torn out, or those gaps that are opened, are the size of hundreds of millions of molecules, which get on wi... | [
"Awesome question; most don't stop and think about these things! So basically, **Unmyelinated nerve fibers** are found in the **dermis**, or commonly known as sensors in the skin. When those sensors are irritated, it is called an itch. Itches are signals to our selves that something is wrong and it should be check... |
Alvin York: an obvious fabrication? | [
"/u/mormengil wrote a pretty good response on this some time back _URL_0_ not to discourage any additional responses of course."
] | [
"Was Oliver North really just a scapegoat for the big fishes?"
] |
What is data and how can it be stored on a memory card? | [
"Flash memory comes in a few different flavors and it's kind of difficult to understand how it works: _URL_1_ If I were to ELI5 the above I would say: Imagine you have these microscopic swimming pools arranged in a grid, millions and millions of them. When you want to use them to store data, you fill some of them u... | [
"To give a really simple example.... Say you want to compress a text file that contains: \"AAAAAAAAAAAAAAAAAAAA\" Originally that file is 20 characters long. You can compress it by doing this instead: \"Ax20\" You've now reduced it to 4 characters with no loss of information. In reality, compression works similarly... |
How did the economy of Medieval Empires of Vijayanagara function? How advanced was the bureaucratic administration? | [
"Follow up question how do you even say Vijayanagara? I heard some Englishmen say it vagina-gara. How do you pronounce it properly?"
] | [
"I responded to a similar question a few months ago, if you're interested: * [How did people in the Middle Ages deal with Down’s Syndrome and autism?](_URL_0_) You might also be interested in Irina Metzler's new book, *Fools and Idiots? Intellectual Disability in the Middle Ages.* She's absolutely one of the, if no... |
Could anybody recommend any good readings for an overview of the beginnings of the Holy Roman Empire? | [
"If you're talking about the origins of the Carolingian Empire, there's a ton of good books. If you're interested in scholarly history, The Frankish Kingdoms under the Carolingians by Rosamond Mckitterick is a good one. However if you're talking about the origins of the Ottonian dynasty Holy Roman Empire and onwar... | [
"Anything by Trevor Bryce. Specifically: * *The kingdom of the Hittites* (Oxford, 1998) * *Life and society in the Hittite world* (Oxford, 2002) * *The world of the Neo-Hittite kingdoms* (Oxford, 2012)"
] |
Why isn't the whole night sky brightly lit? | [
"Stars only emit so many actual physical photons. Once you're sufficiently far away, those one hundred million bazillion gajillion quazillion little particles of light have spread out so much that there's no longer a steady stream of light for your eye to even detect. Nearby stars are still close enough to register... | [
"> I see pictures like this: _URL_0_ and long to see this sight for myself. I think those types of pictures are taken using decent cameras with high ISO settings and a long exposure time (maybe 25 seconds or more). They don't reflect what you'd see with the naked eye, unfortunately. Here's one photographer's rendit... |
The big gap between video and photo resolution | [
"Video formats that are presently called 4K range from 7 megapixels to 33 megapixels. Youtube currently allows video uploads up to 12.6 megapixels in resolution. _URL_0_"
] | [
"Yes, hence the concept of 'echo'. Only sounds that are separated by more than 1/10th of a second can be differentiated by our brain. On similar lines for visual images we have - _URL_0_"
] |
Why are cold-weather countries generally more developed than tropical countries? | [
"That is not always true. In the Americas, for instance, the most developed part was in Mexico, a tropical country (the Aztecs and Mayas). And in Asia, India has been a center of high culture despite its warm climate. Further west, Egypt and Sumeria were pioneers of culture despite a sweltering climate. Parts of Ch... | [
"There are lots of ways for animals to traverse the earth, not to be trite. Addressing your specific example, this wiki. _URL_1_ Indonesia was at one time linked to the rest of the islands in that part of the world, when sea levels were lower due to so much water being bound up in polar glaciers. When the glaciers... |
I was taught that viruses are not technically alive. Is this true? | [
"Firstly you are correct. Viruses are generally considered non-living. As for the cleaners, it's just a marketing term to compensate for not everybody understanding the distinction between living and non-living pathogens/parasites/viruses."
] | [
"Plants and single-cell organisms don't have brains either, and they move, reproduce, eat, etc. Jellyfish **do** have nerves, and they're distributed all over the jellyfish body, so you might call that a decentralized brain... What makes you think life needs a brain?"
] |
Why do many gaming companies make new game engines, rather than continue to work on and improve the current one in use? | [
"Isn't that what many of them still do? Improve the previous engine."
] | [
"Inflation. Let's put it this way, in America it used to be that you could buy a steak dinner for let's say $5. Then today that same steak dinner would cost $50. How much we pay for things, and how much we get paid has increased slowly over time. In other countries, it has increased way faster, so something that us... |
What people mean when they say a car has lb-ft of torque. | [
"Torque is a measure of twisting force. If I have a wrench that's a foot long and use 10 lbs of force at the end, I'm applying 10 ft lbs of torque. If the wrench is 3 feet long I'm applying 30 ft lbs of torque. It's the measure of the peak twisting force that can be applied by the engine. This is different from... | [
"You've more or less answered your own question. The form 0.5 c x^2 is obtained by integrating the expression y = c x. And \"y = c x\" expresses that one variable (y) is proportional to the other (x). Two variables being proportional to eachother is rather common, so the relation y = c x appears often and by extens... |
Why do helicopters crash so often? | [
"They don't? They're like airplanes. You'd think they crash a lot because you see it in the news but then you have to realize there are thousand of them in the air every single day. The only difference is you hear about military choppers crashing because more often than not they are in a war zone and got shot down.... | [
"Imagine a needle in a haystack that is 10 kilometers wide, and there are only 10 people designated to finding said needle. It would take them an insanely long time. They might find a few of the needles in their allotted time frame, but likely not all of them. When a game is released to the public, it's the same wa... |
how are viruses made, and how do they steal other's information? | [
"Viruses are made by injecting their genetic material (they can use either RNA or DNA) into a living cell. That cell can't tell the difference between the virus material and its own, so it reads the virus material and follows the instructions. This causes the cell to produce the protein coats and genetic material f... | [
"basicaly sending a lot of trafic to a destination you intend to take down, there is so much trafic the destination can handle before it gets cloged and legit users cant access, imagine like its a highway, be it 10 lines or more no matter how big, if you sudenly start moving thousands of cars on it trafic jam will ... |
At what point does it become more efficient to turn your car off and back on rather than let it idle? | [
"For a modern fuel injected car, it's on the order of seconds. If you're stopped for any appreciable amount of time (maybe even a long traffic light), it's more efficient to turn it off."
] | [
"In a permanent-magnet DC generator, the output voltage is determined by the RPM, and the RPM is relative rotation between rotor and stator. So, if you spin the rotor at 100RPM, but spin the entire housing backwards at 200RPM, then the relative speed between the two is 100+200 = 300. And so the output voltage wil... |
Why do our brains sometimes take unreasonably long times to remember information, even though the information was obviously there the whole time because we come up with it eventually? | [
"Imagine you're trying to find a coffee shop in a city. If you've been there recently, it should be pretty easy to find. If it's been 10 years since you've been to the coffee shop or the city, it might take you a LONG time to find. It also might take long to find if you've been to other, similar coffee shops in the... | [
"Just like how we learn to walk by putting one foot in front of the other as babies/toddlers. Eventually your motor functions get so good at these \"menial\" tasks from repeating them so much that you don't need to think about every individual step, just where you want to end up. I'm no expert though."
] |
How exactly does an aspirin help with a headache? | [
"Aspirin stops the formation of enzymes that cause the pain sensation in the body. It is known as a cyclooxygenase (COX) inhibitor. COX creates a compound called prostaglandins, some prostaglandins activate pain stimulation in neurons, your nerves. All aspirin will work in the same way regardless of which you buy. ... | [
"Could somebody explain how, if true, small amounts of alcohol is good for you?"
] |
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