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What do dogs hear when music is playing? | This is probably as hard to answer as what do you hear when you hear music. Eg, you have low frequency sensors, for which, since your neurons are fast enough to lock onto the phase of sound cycle by cycle, it does, and gives you information like where the sound is coming from, high frequency sensors which can't do this... |
How accurate is that XKCD comic about password strength, and is the suggested method really the best? | You need truly random words so you shouldn't choose them yourself. This is the usual method: _URL_5_", 'DoD Information Security here Here's a better way:physical tokens + PIN + "something you are" ..if you want to go that far out and implement multifactor. I remember having to have a 14 character password, upper and l... |
Why do Asian immigrants more than any other race give their child "American" names? | Are you sure about the african immigrant thing? Black american names have african roots but also english roots and heavy french roots and aren't strictly traditional african names. In general the farther away from a romance language someone's name is the more it gets changed and mangled to sound more english.This seems... |
If humans continue to cut down forests, will there eventually be a point where oxygen produced can't compensate for oxygen being used? | That is what happened in the Permian-Triassic extinction, the great dying. Volcanism warmed the earth, killed a lot of trees, oxygen levels fell to 10-15%. Everything died that couldn't adapt to the lower levels of oxygen. Most mammal-like reptiles died. A few small ones evolved a diaphragm that helped them get more ox... |
Why can't we harvest the energy produced by lightning in order to power our homes and devices? | The electrical grid at any given time, within a certain allowable range, must have balance between producers and consumers. There are people whose only job is to monitor consumption and production, make the phone calls and flip the switches necessary to keep them in balance. A lightning strike, being massive and unpred... |
Since Base 10 was just create due to the number of fingers on our hands, why are all of our senses logarithmic to a base of 10? | We use different bases in math for different reasons. In computer design there is the binary numbering system to base 2?and the hexadecimal system with a base of 16 LIKE THIS 0 1 2 3 4 5 6 7 8 9 A B C D E F - ARE ALL NUMBERS so that all the spaces in a 16 bit byte can be written with a single symbol. In the 50's our ma... |
How is water 'purified' naturally (where it is safe to drink)? | In denmark a lot of the filtration happens by the 40+ year cycle that the water takes through the earth to the water table way below surface. As the water descends through dirt and topsoil all the impurities bind to the dirt and after many years it is mostly clean. Now in southeast Jutland most of the layers below grou... |
how does capitalism directly impact the environment | It is related to what is known as the Tragedy of the Commons. You have ten big companies, all of whom pollute as much as they can get away with. If one company tries to pollute less, they will increase costs and be unable to compete, and go out of business. Without gov't regulation, companies basically have to pollute ... |
Why do we rake leaves, is there any benefit? | Most leaves have acid in them that kill grass, and most people like lawns. If you go into the middle of a wood and look for an area without too many bushes and brambles, you'll see what your lawn would look like without raking. Dirt, covered by a couple of inches of packed-down, damp leaves. |
What are the criticisms made by the Chinese government against democracy and to what extent are they correct? | A couple years ago there was an interesting [TED talk] on this subject. If you have 20 minutes and are genuinely interested, I'd recommend watching. One of the main takeaways for me was that, in democracy, the most popular person gets the job, where in communism, people are promoted through the party based on merit . T... |
Why have wages been stagnant since the 60s, yet housing costs have doubled and college costs have trippled? | I think it's worth pointing out that you are saying average wages haven't changed, when adjusted for purchasing power, and your listing tuition fees that *haven't* been adjusted for purchasing power. So it might be that maybe after being normalised you might see that tuition costs have risen, but as it stands you're no... |
Why is California protective of illegal immigrants and provide so many benefits ( education, healthcare, driver's license, etc.) | This is going to be short. California is very expensive, but California is also very agricultural. Agriculture needs large amounts of cheap labor for parts of the year. Migrant workers are cheap, like very, very cheap. Most of the summer season food you buy in the winter comes from California. If these prices go up eve... |
Why do so many people dislike/discredit Mother Teresa? | To my knowledge, this book exposed a lot of her actual practices. Generally speaking, /u/kouhoutek's comment is appropriate. _URL_0_ |
does how much you chew your food effect how much you get from the food? | Chewing is important for increasing the surface area of food you eat. If you don't increase the surface area of a burrito, then relatively little of it will be exposed to acid, enzymes, and other molecules involved in digestion. This will mean that more of it will go undigested, and thus the nutrients in that food will... |
Why are more brightly colored things, such as berries and animals, typically considered to be more dangerous? | It's called [Aposematism]. The basic gist is that predators associate the color with terrible taste or poison, sickness, etc. |
Do we really need the NSA? | John Casey would be out of a job and I wouldn't be too happy about that, especially after everything he's done a lot for Chuck. |
Why is tile always cold? | Tile is usually the same temperature as the room, which is cooler than your body. Of course the air is cooler than your body too, but you don't feel it, because air is not very dense so it doesn't absorb much heat. But tile is *very* dense so it absorbs lots more heat. Thus it feels cool to you -- heat is leaving your ... |
What is the visual part of fire? | The flames of a fire are made of ionized plasma, its a state of matter There are actually more than the 3 states of matter you are typically taught about in grade school but for the most part people don't interact with the others |
Why does a plastic playground slide build up static electricity when it is hit by sunlight? | ipanpan has a good start. There are always stray electrons flying around, everywhere. The plastic of the slides tend to build up spare electrons just from the air currents moving over them, so its not really the sun that makes them collect charge. As the air around the plastic heats up, it loses its density and humidit... |
Why was The Greenhouse Effect taught to me as fact but now up for such debate? | There are a couple questions here. the first being that around the Greenhouse effect. Does it exist? Yes. This isn't being disputed . Infrared energy from the sun hits our planet and gets absorbed by the gasses in our atmosphere, a net energy gain for our planet. It What are causes of the Greenhouse effect? Greenhouse ... |
Why do so many people have seafood/shellfish allergies, yet red meat/ poultry allergies are so unheard of? | My daughter is allergic to any mammal meat - beef, pork, lamb. Probably whale too. It's called Alpha-GAL and a person gets it from a tick bite.Shellfish share similar proteins with cockroaches, and these are the proteins that people are allergic to when they have a shellfish allergy . There are theories that people who... |
Why are states like California and Colorado allowed to legalize marijuana and have medical marijuana dispensaries if that contradicts federal law? | The idea is that the 10th amendment of the US constitution gives states the power to decide on laws that are not expressed in the constitution. They are breaking federal law, but the feds don't want to target the actual legal aspect of it because they know they will ultimately lose. They would rather target people who ... |
people's hate toward rollerblading | Only hate I ever heard towards rollerbladers was from skateboarders. The reason had to do with them sitting on the skateable terrain and generally getting in the way and being clueless. For a while kids wore rollerblades and tried to grind ledges and jump down stairs in order to SEEM like they were doing cool tricks li... |
Why do big poker tournaments still use physical chips? | Makes sense to me. These big tournaments are televised like any sport, and the chips add to the theater of the thing. If it's not entertaining in a visceral way to look at a table and see that one guy has a giant pile of chips and one guy has like four left, I won't watch. Plus, if you do away with chips then you have ... |
How is Netflix making money from House of Cards? | How do Netflix earn money on anything? I honestly don't think all that many people signed up just to watch Red Dwarf, or Downtown Abby or.. well, any show. Instead people sign up because Netflix has a wide range of shows. Adding shows you can't get anywhere else to the mix, make them even more attractive. Hopefully thi... |
How does facebook sell personal information, what information is it selling, and to whom? | You sign their terms of usage when you make an account, in there is a clause that allows them to sell this info. They sell it to advertisement companies, that's true, stuff like age and gender, location and pages liked. Stuff like that. And again, to marketing companies etc. If you want to know more about ToU of certai... |
What caused the physical differences between ethnicities? | Well, skin color's pretty easy. Melanin, the pigment responsible for most of skin color, exists as a protective measure against UV light. In small amounts, it's what gives you a tan. Africans lived in a sunny environment, in cultures that typically lived and worked in most outdoor environments than did Europeans . |
Why does the US consistently ally itself with Sunni majority countries while ISIS & Taliban are extreme Sunni? | ISIS are Sunni. 90% of Muslims are Sunni. ISIS wants to recruit Sunni Muslims.If the US makes enough friends with Sunni Muslims, ISIS won't recruit as much of them. That's why the US wants to ally itself with Sunni majority countries. |
Why does it seem that the US is further behind in teaching other languages in education? | The main language in the US is English, which is currently a world language and the most important language, economically, on the planet. It has become a lingua franca in much of the world, so that knowing English will help you get by in almost any other country. You will find that it's not only the US that doesn't tea... |
Since the colon is responsible for absorbing water in the body, how come people with ostomy bags aren't constantly dehydrated? | My son has an ileostomy after his entire colon was removed and he use to get dehydrated all the time. He now has a g tube to supplement his fluid intake so he doesn't wind up in the hospital all the time. |
Why does the sun cause long term skin damage if we are constantly losing and re-growing skin cells? | UV can cause DNA damage. If this isn't repaired, then the next time your cells replicate they will be copying the damaged DNA strands, leading to long-term effects. |
Can Deus ex Machina, be an excuse for poor coherency/probability in a film's plot? | There have been some great explanations, I would just like to add the following: R2D2 is a perfect example of a Deus Ex Machina. When the gang is in trouble, he is there to 'conveniently' fix what would otherwise be a fatal problem . Does this make Star Wars bad because of it, or mean that it suffers from bad/lazy writ... |
why the U.S government feels the need to spy on all U.S citizens? | Some spy agencies like the NSA have decided that if they collect information on everyone, and then run it through special algorithms, they might be able to find potential terrorists. It's the old needle in the haystack idea. In the old days it would have been impossible. But now with super computers, it can be done rat... |
Why does the US look for oil in the Middle East if it has enough at home and in Canada? | Most of the refineries in the U.S. were optimized on the premise that oil is getting heavier. What we've been finding in the U.S. has been lighter and can't be processed in U.S. refineries without investment. This is actually why you're starting to see condensate splitters popping up everywhere . Canada tar sands fit t... |
The difference between a Republic and a Democracy. | In a Democracy, you vote on everything, like whether or not you want chocolate milk or strawberry milk. But you also have to vote on important stuff you may not know anything about, like whether or not daddy should invest in your college fund and how. In a Republic, you choose someone to choose for you. So if you don't... |
How are single threads woven into large sheets of fabric? How was this achieved before modern machinery? | The machine for weaving fabric is called a *loom*. You could read for months about the history of weaving technologies, but this is ELI5, so I'll just describe the very basic principle of what a loom does. On a loom, you have lots and lots of threads all stretched out parallel to one another. The weaver uses part of th... |
Why is it legal for employers to not employ you based on your past on social network sites. | It might be stupid, but employers are allowed to make decisions for stupid reasons. There is only a short list of reasons that they CANNOT use: racism, sexism, ageism, religious bias, and a few others. Virtually anything else is fair game, as long as it isn't just cover for a prohibited reason. In Iowa, [the courts rec... |
Why cannot signatures be forged/copied perfectly, with sufficient resolution and the right ink? | It's possible to make a near perfect fake, but criminals are lazy and good enough is good enough for them. And most real signatures are done with cheap pens, so it makes more sense to fake one using a cheap pen. |
What did Sony achieve by cancelling "The Interview"? | They didn't really have a choice. All the major theater chains refused to show it, on account of the threats. On why the theater chains canceled, it's probably an unwillingness to deal with the fallout should an actual attack happen.Simplest possible answer is **Fear of lawsuit.** If one person were to be injured at a ... |
Why are cats so attracted to boxes? | Cat's like to be in enclosed spaces. It gives them a feeling of security to not have to worry about anything that isn't within their sight. They also are ambush hunters, a box gives them a place to hide Cat's also spend most of their day sleeping, cardboard is a very good insulator because there is suspended air within... |
In the restaurant industry, why do prices increase from breakfast through lunch and into dinner? | It's a combination of higher cost of dinner ingredients, and supply and demand. Unless it's a niche restaurant that primarily serves breakfast, restaurants generally bring in more customers during the evening hours when dinner is served. In order to take advantage of this increase in customers, as well as to avoid depl... |
from my 5 year old. why can't we feel the earth spinning? | It rotates too slowly to feel any effect, the earth rotates once in around 24 hours, if you stood on a playground roundabout that took 24 hours to turn round you wouldn't even notice it was moving. Now for a slightly more sciency answer, while the earth is moving very fast at the surface you don't actually feel speed, ... |
Why do we eat 3 meals per day? | There isn't any biological reason, it's a cultural thing.Personally, I almost always just eat one huge meal per day.Some tribes don't even eat every day. |
Why do we instinctively cover our mouths when we witness something horrific happen? | As body language, and I'm taking a guess here and saying that it's perhaps a reflex that developed to hold in vomit when seeing something disgusting, or to suppress the sharp gasp when surprised to prevent possible predators from hearing it. |
what are the ramifications of Scotland's 2014 independence referendum and why do most Scots not want independence at this time? | I personally don't believe that only ~28% want independence. You can see the results of some historical independence polls [here]. I just find it hard to believe that it would be so low when we have a fairly popular nationalist government in Scotland. Another thing you have to bear in mind is that these opinion polls a... |
Why does my fuel economy suffer in the winter? | Well, it's true there are different additives that make up different types of fuel, Summer/Winter. This should only lead to a marginal decrease in efficiency/power. However, the change you are seeing is fairly significant. This is most likely due to 1) your tires being under inflated, which increases the rolling resist... |
What's the difference between beer, lager, ale, and stout? | Lagers are fermented at low temperatures, ales are fermented at higher temperatures. Each use different yeasts that thrive at different temperatures. So beer is both lagers and ales. Lager is beer, ale is beer. A stout is simply a style of ale. It gets more complicated from there. Lager could potentially resemble a sto... |
The concept behind "Injury Prone." Is it just a label or does it hold some scientific backing? | Yes, it's a thing. For most athletes, it's probably a result of their play style more than genetic musculoskeletal inferiority. Maybe you don't focus enough on your peripheral vision. Maybe you push yourself to and past your physical limits more than your teammates. Maybe your form is janky. Or maybe you're just unluck... |
Where does wind get its energy from? | Warm air rises, and cold air falls. The sun will warm a certain area, for whatever reason, causing the warm air the rise, causing other air to blow in and take it's place, creating wind.This in turn gets heated and rises. if you want to see it at home, get a clear bucket, fill it with water, and put food colouring in o... |
How can YouTube videos be a "job" ? | Firstly, you work. It is a job. But no, you don't work for Youtube or for Google. You are self employed. As soon as money is involved, government will be involved but only when a certain limit of income is crossed. Till then you are good.The payment is done if you have a lots of subscibers or views. In that case, Youtu... |
why do guitars have frets but violins and cellos do not? | Ease of use. You can find fret-less guitars out there, but they are very difficult to play. Violins and Cellos were made, originally, for the very wealthy and the very dedicated. You couldn't just hop over to the cello store. You had to be extremely dedicated to buy a cello, or a violin. Those instruments were made for... |
Why do doctors tell us to not eat after we brush our teeth and vice versa? | Your dentist used a [topical fluoride varnish] or other treatment and doesn't want it to be rubbed off. You should brush after eating. Brushing just before eating makes no sense.Vice versa???? Why we dont brush our teeth after eating? Well I do. |
Why does milk have much more carbs than cream? | Cream, by definition, is the part of the milk that's made of fat. Fat doesn't have carbs such as lactose. |
Dead friends's account liking pages on Facebook | Yes- if he ever mentioned or linked something about coke while he used the profile, Facebook may show it as he 'liked' something when he didn't. Don't worry - nobody is using his account!", 'Thanks guys, was pretty weird to read first thing waking up, thanks for clearing this up for meIt's not a mystery but my friend h... |
Why aren't university professors expected to undergo teacher training? | Though it's the case that professors do undergo some training , I think the biggest thing isn't that professors don't receive training, but rather that they are usually not hired to teach. Most professors are hired to do research, and many only teach because they have to. This is contrary to elementary/high school teac... |
Why do Christians get so irate about evolution? | Honestly. I think it's because no one likes being told their wrong. And I also think part of the problem is evolution can refer to soooo many things. From us all coming from an single thing. To an animal evolving to better suit a new environment or need. And if you are raised as a Christian sometimes you are never taug... |
I just got the "Ghostery" add-on for Firefox and it tells me that "Google Analytics" basically follows me everywhere, why is Google allowed to do this? | Google analytics works on a site-by-site basis. If you want to track how many people visit your site, what browser they're using, approximately where they're coming from, etc, you simply paste in some java code that tracks everything for you. If you don't want to be tracked, don't use websites that track that informati... |
Why airplane seats must all be upright position when taking-off ?!!! | Take offs and landings are the most dangerous operations on an airliner. In case something goes wrong, the upright seat position ensures the seatbelt does what it's designed to do: keep you attached to your seat and make it easier to evacuate the plane when/if possible ", 'Taking-off and Landing are statistically the m... |
Why do apps need to update so often? | 1. Technology is ever-changing, phone OS's are being updated, apps need to stay up to date for compatibility 2. glitches and new bugs are discovered, reported, and resolved 3. App Store reviews are only shown for the current version, so a new patch = good way to cleanse out bad reviews |
What are the cognitive mechanism that drive us to consider suicide? Wouldn't the act of thinking about ending our existence be selected against or at the very least incredibly repressed? | For me, the pain of living almost outweighed the desire to escape that pain. The only reason I didn't is because I didn't want my cats to go to a shelter. So I got help for their sake. It was a long and arduous process. I was in my early 40s. |
How does McDonald's sell 10 chicken nuggets for $4.49, and still sell 20 for $5.00? | A prime example is at the movie theaters:Small popcorn: $5.00Medium Popcorn: $8.50Large Popcorn: $9.00 you feel like you're getting a bargain by buying the large vs the medium when its only a 50c difference. |
Why can't people just get divorced? Can they just both agree to go their separate ways without lawyers and such? | One of the challenges with divorce is that often the 2 people really loved one another - after all, they chose to get married - but they've discovered that they aren't right for each other. So now they have to walk away from the person they love. That's hard. One of the easiest ways of walking away from love is to over... |
why people in older pictures/movies (black and white) look "different" than modern day people? | The facial shapes of young females faces pre 1940's ish always struck me as very similar in all pictures I've seen. Their faces seem rounder, more up-side down teardrop in shape. This can't all be make up and photo quality can it?", 'I'm not sure if this is what you mean, but often they had filters or gels on the camer... |
Carbon Dating, and accuracy of it. | When an organism dies, it stops taking in Carbon. Specifically, Carbon-14, which is radioactive. So as the organism's remains lie there the amount of Carbon-14 it started with decays radioactively. We know what proportion of Carbon is isotope 14, so we can calculate how much of that original starting amount of Carbon-1... |
Why is David Cameron resigning in shame? | Not British, but he essentially can't be the person who leads negotiations to exit the EU . There would be calls for a vote of no confidence and, regardless of his resignation and probably a fresh general election in light of the vote. He wouldn't last long if he tried to stay and I don't blame him for not wanting to p... |
How does exposure to sunlight generate vitamin D? Some kind of mammal photosynthesis? | It's not really taking in the energy of the sun , but more using UV-B rays from the sun to break bonds in the cholesterol in your skin, so your liver can attach some oxygen and hydrogen, then your kidneys contribute a few more oxygen and hydrogen, until it's been rendered into something the body can absorb.Photosynthes... |
Why does "rapid rehydration kill"? | A lot of the responses below are correct, it has to do with the water and electrolyte shifts in the body. The main electrolyte at play here is Sodium, and in severe dehydration, the sodium in our blood/plasma becomes very concentrated. This elevation in blood sodium levels is also a primary driver of our brain's thirst... |
How much heat does a pre-heated oven lose when you open it up to put in the food? | No, air holds barely any energy. Air is heated really easily, and it doesn't hold much energy - that's why a blast of 200 degree hot air to the face doesn't do anything, apart from making you blink. In technical terms, air has a heat capacity of 1.02/.77m^3 In comparison, steel has a heat capacity of 0.5/0.000127m^3 Th... |
Why do we round up on 5? | because it's in the middle? 0, 1, 2, 3, 4 - 5 numbers 5, 6, 7, 8, 9 - 5 numbers. |
Why are grenade launchers not commonly used instead of bombs? | Grenade launchers are fairly visible so someone using one will be identified and maybe stopped after they take it out or if not then after they have fired it. If you plant a bomb identifying the bomber isn't always that easy. |
Tesla released all its patent on their car in 2014 so that anyone can use them. Why isn't there any other Car Co. using them ATM? | Any number of manufacturers easily could be using various parts and concepts invented under a Tesla patent and you'd never know it. As far as you know the latest Ford Hybrid is using the battery charging systems of a Tesla, and Ford-Original everything else. Nobody's told you because the particular design of the altern... |
Why are return (round trip) tickets the same price as single tickets. It's something i have never understood | I have personally not seen an instance where a 1 way ticket is the same as a round trip ticket for airlines. That being said, a 1 way ticket leaves a seat open on the return in a sense. From there, I can see why they would make a 1 way ticket more than half the price of the round trip ticket since it disrupts the norma... |
Why are tubs of ice cream not required to have a safety seal in the US? | Why would they need to be required to? I honesty can't think of a reason.Most products I can think of that do have safety seals are liquids and packed in plastic or glass containers. Ice cream and most other frozen products are packed in cardboard boxes that would be easy to tamper with even if they had a seal.The publ... |
Why is hitting a wall at 100mph worse than a head on crash with two cars at 50mph each? | Consider the total energy of the system. For a moving object, kinetic energy is given by E = 0.5*m*v^2 . Taking simple numbers, our cars weigh 10kg and have velocities of 1 and 2 metres per second. So in the case of one car going 2 metres per second: E=0.5*10* = 20J. In the case of one car going 1 metre per second: E =... |
Why are kinder eggs banned in America, but knockoffs aren't? | As a Canadian with full access to kinder eggs, I buy the kinder bars. The original kinder bars with the milk filling are basically the kinder egg chocolate but without the lame toy. Jolly ranchers are way more dangerous anyway. Don't give hard candy to children ", 'I always thought it was just because they're a hazard ... |
Why do scientists assume an alien species would use the same math system as us. | There's only one mathematics. Anything we discover could be explained to aliens, or vice versa. The trouble is finding a common language – we would undoubtedly have very different notations. But something as simple as a list of prime numbers should be quite easy to communicate. A trivial unary encoding should be [hard ... |
How does google photos know what is on my pictures? | It uses something called Machine learning. Machine learning is our current best way to simulate learning, it involves using many cases that people know contain what they're looking for. The machine then looks through all these pictures where it picks out details that make an object what it is. After a significant amoun... |
Can someone explain to me how from thin air (a wireless connection) I can download little bits of data that fill my computer. | First off, data does NOT take up physical space in your hard drive, no matter where it comes from. Second, your wireless connection is a radio. Basically your computer is talking to your wifi connection just like you would talk to a person over a walkie-talkie. Remember that screechy static noise that fax machines and ... |
How is Half-Life constant if radioactive decay is both random and spontaneous? | Half life is a *prediction/description* of what we expect to see-- and have seen-- in various samples of an element. Being a prediction it is one-size-fits-all, and there *will* still be some random variation that makes it imperfect. But you'd see *noticeable* variation from the model in only a few cases. That happens ... |
What the hell is going on regarding Planned Parenthood | This is what Snopes says: _URL_0_I don't know how many conservative outrage types can read it all at one sitting because it is very long and doesn't say all the things they want it to. It also requires some basic understanding of medical research which is really the area for which The Lord is responsible. Some knowledg... |
[Culture] ELI5: Why is 666 the number of the Beast? | During the 1st Century, there were many Jewish cults in Palestine who were resisting Roman rule, and they wove that into their theology. The early Christians were no exception, and much of Revelation is thought to be a metaphor for the comeuppance the Romans would be receiving when Christ returned. When the precise mea... |
how does banning a certain type of weapons work? Who bans it? And what's stopping groups or countries from using them anyway? (Example: chemical warfare) | A group like the United Nations can agree on this and agree to stop trading with countries that do. They are called sanctions. Very few countries have the ability to survive on their own. They need to import the products they can't make and they need to export the products they can for money. By placing trade sanctions... |
Why are giants often portrayed as moving ve...ry... sl....ow....ly? | Basic physics. It takes a lot of energy to move a lot of mass. It's also the reason that little insects and things like humming birds blow past you faster than your eyes can track. |
why do Checkers and Rally's restaurants exist to serve the same food, but have two different names? | I find it so bizarre. I'm not a business man, but if I bought a company, I wouldn't waste my time or money owning two trademarks that serve the exact same purpose |
If our inner ear fluid controls whether or not we're dizzy, why do things spinning in movies make us dizzy? | Because your eyes, the main way your brain takes in information, is sending the signal to the brain that your body is spinning. You vestibular system system is sending your brain a signal that you aren't moving. |
Why does the human smile convey happiness? Shouldn't stretching the muscles in your face upwards to display your teeth be threatening like it is with animals? | I can't answer your question directly but an interesting fact to consider is that cats display trust by, among other ways, shutting their eyes. Since this lowers their defenses, they only do this when they feel safe.Another thing to consider is what you mean by "smile." Do you mean a mild smile with gently upturned lip... |
Why are there risks of suicidal thoughts when taking antidepressants? What risk causes this? | _URL_3_ I'm not a psychologist but Robert Sapolsky tells that in this video that a person who is an major depression state is usually too lazy to get out of the bed, let alone try to commit suicide. Once the antidepressant takes effect he/she is in the risk group for suicide. |
Why do cell phone companies charge so much for data? Is there a legitimate reason? Or is it just because they're greedy? | It's because they can. The markup on data is several thousand percent. It costs them nearly nothing to give every customer unlimited data, but by artificially lowering it they can charge customers more to get that same service, and offer it on tiers so they can profit from it at every level of purchase. So instead of j... |
If flouride is classified as a neurotoxin, why is it used in my toothpaste and in the water I drink? | It takes about 5-10 grams of fluoride taken within a relatively short period of time to kill the average adult. That's actually quite a lot. Natural ground water in many parts of the world have in excess of 1.5 grams of fluoride in the water for every liter . By comparison the EPA shows an average of 0.0005 - 0.004 gra... |
Why do women look different than men? | No, not really. Genetic diversity is a big deal evolutionary-wise. If you reproduce with yourself, you can't produce a unique offspring, you're basically just creating a clone of yourself. Secondly, having two 'specialised' sexes is also a big evolutionary advantage. Basically, one sex to bear and raise offspring and a... |
Why are companies allowed to put misleading super-delicious-looking renders of their food on packaging and menus? Why aren't they required to put a realistic pic? | These companies aren't really required to make beautiful food, just provide what they advertise, which is what they are doing. They are showing you all of the items you get. Making it appetizing is the only right thing to do since it's an advertisement.Depends on the country. Here in Czechia they actually are required ... |
What is the difference between Anime and Cartoons? | It's the difference between a 13yo in your basement laughing on a Saturday and a 31yo in your basement crying on a Friday. |
How do astronauts withstand the noise of launch, while spectators need to be miles away | It has to do with having a lot of insulation. The space shuttle was designed to withstand huge amounts of stress from entering the atmosphere. Next to that, sound seems kind of weak. Cars behave the same way. If you're inside a car, it seems much less noisy than if you have the hood open and are standing next to it. |
How do shows like Wheel of Fortune and Who Wants to be a Millionaire afford to pay people all of that money every day/week? | Wheel of fortune especially doesn't pay for the prizes. Notice how the prize is always talked way up, and the brand name mentioned? For the cost of one of their products a company can get mentioned in a big game show, and then we see a group of people thrilled to compete for the chance to win it. That's some quality ad... |
How does schizophrenia develop and what exactly does it do to the brain? | In schizophrenia there are positive and negative symptoms. Positive symptoms are things like delusions, hallucinations, behavioural/speech issues and thought disorders . Negative symptoms are often the more 'disabling' part of the disorder and involve things like not experiencing or displaying much emotion, a lack of m... |
just why salt and pepper are added to so many recipes. | Fun fact: if you're wanting to add a savory flavor to a dish, and you're already using a lot of salt, add some vinegar. Not a lot, mind you, but it does the same thing for a dish that salt does and accentuates the savory flavors of whatever you're cooking without all of the sodium. I wouldn't use it as a replacement of... |
If life first emerged from natural chemical reactions, why is emerging proto-life not observable today? | Most likely, if any new proto-life were to emerge on modern Earth, it would simply be consumed by existing microbes without leaving any evidence of its existence. It could be happening all the time, but we'd never know unless we *directly* observed it, because it won't survive long in an already-populated environment. |
Why do cable companies not allow the option of picking and choosing channels? | Meet [Turner Broadcasting]. They own Cartoon Network, CNN, TBS, and TNT. They will only sell those to Charter in a bundle- it's either all of them or nothing. Meet [Viacom]. They own Nickelodeon, Comedy Central, MTV, Spike, and VH1. They'll only sell those to the Charter in a bundle. Meet [NBC Universal]. They own Brav... |
Why pizza has become so expensive? | Can always just make some yourself 1 1/2 teaspoons active dry yeast 1 1/2 cups water 3 cups all-purpose flour Flour 1 teaspoon sea salt In a large bowl, dissolve yeast in water. Stir in 2 cups of flour and salt; mix well. Stir in the remaining flour, 1/2 cup at a time, beating well after each addition. When the dough h... |
Why is Al Jazeera not allowed to broadcast in the US? | Al Jazeera is not explicitly forbidden from broadcasting in the USA. The reason we don't have it is the following: * They have not tried to open any on-the-air TV stations in the USA, as far as I'm aware.* They'd like to be on cable TV. But the cable TV operators in the USA won't carry Al Jazeera. There is a lot of con... |
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