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Why do people buy 4k TVs without 4k content? | I have a samsung 4k tv, and my roommate has a slightly smaller 1080p samsung tv, and I can tell a pretty big difference between the two. I can't make out individual pixels on the 4k like I can on the 1080. It is a clearer picture, it's like looking at the old non retina ipad or iphone, then looking at the retina displa... |
Why cheap cars always have to look ugly, it's just a shape of the metal, producing Ferrari looking bumper shouldn't be that more expensive or challenging. | The industry is trending towards mimicking luxury-style exteriors, which means luxury-car makers will evolve to do ridiculously stuff. See Chrysler vehicles imitating the Bentley style grills. Next, Bentley will have to do crazy designs so that it can't be copied.I think a number of responses here have missed the spiri... |
If the Romans could build roads that lasted 2,000 years why can't we make roads that last longer than a generation before crumbling? | Certainly more *could* be done to ensure roads lasted thousands of years, but modern roads simply aren't designed to last that long to cut down on costs,etc. |
Why has no one made a faster commercial plane since the Concord? | The [power required to overcome drag] is relative to the cube of the velocity. So not only is it costly to design such an aircraft, it's also extremely expensive in fuel costs to operate on a day to day basis. Also, I think that in the era of security checkpoints that require you to get to the airport 1-3 hours early f... |
Why are most animals seemingly unaffected by / unafraid of the presence of most other animals but immediately flee at the sight of a human | I think this video is relevant here: [Man vs Lions. Maasai Men Stealing Lion's Food Without a Fight!] Watch the hunters body language and lions confusion. Amazing stuff! |
Why do cologne/fragrance commercials make absolutely no sense or tell you at all about what it smells like? | There's an old advertising maxim: don't sell the steak, sell the sizzle. Perfume is just smelly water. How do you effectively sell that? You don't, you sell the *mystique* of the stuff. |
the feud between the Standing Rock Sioux Tribe and the Dakota Access crude-oil pipeline | It crosses the Missouri River, which affects the tribe as the river runs through their land. They don't want their fishies to die and their water getting dirty. |
Why do US Navy ships care if Russian planes buzz by them? | Imagine walking down the street, and a stranger closely passes by you with aggressive body language. You don't know what they might do. They could be preparing to attack you, or even just posturing because they're not sure what YOU might do to THEM. The point is, you have no idea what their intentions are. The only thi... |
Why do dogs hate cats? | Strangely, my family's cat tends to chase the dog around. Then again, the cat outweighs the dog by a few pounds. |
Why do they have to replace the (whole) transmission? Isn't there just a part inside they can fix? | Without more context I can't give you any insight. It depends on the nature of the damage, where it may be so extensive it's cheaper to replace the whole unit than it is to pay for the man hours to disassemble and reassemble, which is a complicated, tedious, and precision based task. |
Why is there a "barrier" between the lower and higher ends of your voice? | In my singing training I learnt of three 'voices': chest, middle and head. Your highest notes come from head voice and just think about placing the notes on top of the breath. In chest voice your lowest notes vibrate within your body. And your middle voice contains those notes which for you are comfortably in between. ... |
What would happen to airplanes during a massive power outage? | Mildly relevant: A few months ago I was flying into Cincinnati and I noticed that we had been circling the airport for about 30 minutes or so, but not coming in for a landing. At some point the plane stopped circling and they announced that they weren't able to get in touch with air traffic control so we were being rer... |
Why do certain body parts like eyeballs or hearts look the same across different species of animals? | In the cases you give, it's because all those animals are descended from a common ancestor that also had a heart/eyeball like that. This is not always the case though, and some similar structures are the result of convergent evolution. |
How does copper kill germs? | I'm really surprised there hasn't been research done on the benefits of copper and perhaps how we can use it in our everyday lives to effectively fight viruses. |
Why is fictional writing included in education even for non-English majors? | The short answer is that everyone is pushed to think outside of their own box. To imagine things that are outside of themselves. Ultimately, to imagine someone else's point of view.Because literacy and effective communication are important. Just about any person can benefit from those skills. Some educational programs,... |
When people 'blackout' from inebriation for HOURS - how does their body function? Why is there no memory of the events? | I like to think it's because so much awesome stuff is happening and my brain cannot handle it, so it shuts down as a defense mechanism. |
Is there such a thing as election do-overs in Democracies? | I'm unaware of some vast majority that wants to reverse Brexit. Maybe the young people who decided not to vote, and after months of intense media coverage, but once a formal vote has taken place the outcome is decided, until elections have taken place and the new government does what the people elected it to do. |
- Why is Citizen Kane considered to be the pinnacle of movie making? | This doesn't answer your question, but it's one thing that adds to its mystique. Orson Welles co-wrote, produced and directed *Citizen Kane* when he was only 25 years old.Apart from technical reasons another factor that plays into its fame was its opposition by William Randolph Hearst - the media mogul that feel that K... |
Why do puppies always want to lick your face? | Just like human babies explore the world with their mouths, so do puppies it's also a show of submission and affection through grooming |
How come when I'm out drinking I can sometimes go for hours without peeing, while other times I need to pee every 10-15 minutes? | you are dehydrated before you start drinking. your liver need the fluids to separate the alcohol from your blood, so it'll take longer for the fluids to get to your bladder. you'll have to excuse my shitty english - not my first language |
Why is cannibalism so bad for our health? | Creutzfeld - Jacob's is a prion disease you can get from eating your own kind. But that's about all I know about it. Edit: eating your own kind |
If you forget your password, why do most sites tend to change your password to a random one instead of telling you the original one? | If they're doing it right, they don't know your password to tell you what it is. They store what is called a hash of your password. This is a one-way sum of the characters in your password, so you can't get the password back from it, but doing the sum on the password you supply at login will give the same answer if you... |
Why can't the government just print more money and distribute it to the poor? | You seem to be confused by the other answers here so let me try, for convenience of my explanation I am going to explain it with a system which isn't used anymore called gold standard but the system we use now still has the same problem in this respect. Country X has 100 pieces of gold as its wealth. It prints bills of... |
I’m shortsighted and my eyes get worse every year. What actually happens to my eyes to cause my sight to deteriorate? | Side note: if you are in your twenties and your nearsightedness is significantly progresssing, you might want to consider getting checked for keratoconus. It can cause progressive nearsightedness, and places like WalMart vision might not catch it. The disease warps your cornea so it's more pointed, which can make you m... |
What is an event horizon and singularity in a black hole? I'm not advanced science guy, so pls explain it in a simple way. | A singularity is a point of incredibly high gravitation, its the entire mass of the supernova'ed star condensed into one tiny point. The event horizon is the area around the singularity from which light cannot escape. Basically inside of the event horizon the gravitational pull of the singularity is so high that even l... |
Can a cowboy quickdraw and shoot from his hip as accurately as they do in western films? If so, how? | Essentially you're point shooting, aiming with your body. Where your chest/eyes go, your round will go. You can practice from about the three yard line and move back slowly to get more efficient. |
Why is there no central academy/language regulatory institution for English? | fetus" and "traveler" in American English.Basically, because there isn't. Remember that the nation where English came from *doesn't even have a written Constitution*, so of course they're not going to regulate their language. However, the adaptability of English is due in part to the flexibility that comes from having ... |
- Why is water so important when searching for extraterrestrial life? | Based on all of our observations, we understand that life requires water to thrive. They fully acknowledge that it's entirely possible for life to survive on sulfur, arsenic, or really, just about anything. But to narrow the scope, we look for water because we *know* water and life is a successful mix. Every other basi... |
Why are Baseball teams forced to play so many games compared to other sports? | It's because the games take a different toll. In baseball you hit 3-4 times a game and field half a dozen a game. The only ones who wear out after one game are pitchers, and that's why they don't play every single day. Compare that to the NBA, where guys are running and bumping each other for almost the entire game, or... |
How do solid state drives work and why are they faster? | Hard drives are a mechanical device. In order to retrieve data that is stored in them, you have to move the head to a location, then move it to the next one, then the next, etc. As others have said, think about the arm on a record player, but you have to move it all over the record hundreds of times a second. Obviously... |
Why can't this country be run like a business? | The goal of a business is to make money, whereas the goal of a government is to shape policy and provide for it's people |
Why do children like children's music? Or is more of a social construct? | I know it doesn't really answer the question, but some of the answers remind me of Alice Cooper's response to what music he raised his kids on: Beach Boys, The Four Seasons, and the Beatles. Simple, poppy, well-constructed songs. |
How does sending troops help prevent the spread of ebola? | Because the biggest thing that the people need to help combat the spread of ebola is proper supplies - medicines, equipment, food, clean water, etc. That requires a large amount of supply and logistics, both of which the army is very well suited for. Add in the fact that you want to be able to organize this response qu... |
why does scratching a wound give such a pleasure when it is considered bad ripping it up, leaving it open for infections etc.? | For me it's partly the tightness a scab can cause. Idk if I imagine it but sometimes you feel like the scab is pulling a bit so ripping it off is wonderful because it's a release. The other part is it's annoying to have a raised hard bump on your skin. You're hyper aware of it and keep running your hand over it and get... |
why doesn't anyone have to pay for win rar | People like you and me can not pay for winrar because they won't go chasing individuals that are using their product. Companies however need to have licenses on their products, if not it becomes a liability and can be sued, so they buy Winrar. I believe I've read this explanation here, shouldhave used search function, ... |
"Ensure the device is ejected before removing from the USB port." | Imagine you are writing notes and suddenly your co-worker comes along a snatches the paper away from you mid sentence. That is what could potentially happen if you don't eject first. If some program, in the background, is still writing data to the drive, it can corrupt that data. Ejecting is basically a double check to... |
How is prison labor legal and how does it work? What happens if someone refuses to work? | I think a lot of Americans, although well intentioned, are a bit confused by this whole system. It really is a good thing for the prisoners. It gives them the ability to learn a trade and have a little bit of money to get their lives started with when they get out. The whole program is also voluntary, and only the top ... |
What is Graham’s number, how is it (theoretically) calculated, and how big is it? | [Tim Urban explains it in a very existential, but elegant way. Long article, but sure to cover all bases. ] Simply put, Graham's number is a mammoth number generated through iterative power towers i.e. Giving it progressive exponentiation along the number line. |
Why does America help and support Israel so much? | Thanks for not being a raving asshole. That said im gonna write some more downvote material. The question was why the us supports israel financially; it's because they are a technologically and societally advanced nation in a strategic physical location with military and intellectual resources that the US wants. This t... |
How you can wake up from a dream and a few minutes later when you fall back asleep, fall back into the same dream | I do this a lot! When I can sleep in, if I'm having an interesting dream, I go back to sleep to see what happens. Can everyone do this? Because my husband thinks I'm weird! At one time in my life I was able to control my dreams and I read that playing a lot of video games causes you to have more control in your dreams ... |
Why are so any people in the Linux community pissed at Ubuntu/Canonical? | IdioticPlatypus is somewhat correct - but in terms of Linux distros in general Ubuntu is quite stable. It has a lot of backing and seamless driver support for common hardware. I know a lot of people are annoyed at Canonical's attitude towards Linux, ie treating it like a business when much of the Limux community is for... |
Why, when the sun is so far away from us in the first place, does the 23.5 degree axis of the earth make such a difference to temperature between summer and winter? | It's not about the distance. The angle of the earth makes the region facing away from the sun receive less sunlight per day. This is why days are shorter in winter and longer in summer.Winter and summer are determinate by the inclination of the earth as you can see in [this img] is summer in the north and winter in the... |
Why don't our brains pick up the the second "the" in sentences? | There is likely more to it than this, but I'll answer based on what I know. When we read, we read segments at a time. Eye-tracking studies show that we [saccade] over segments of a sentence. Notice how there is no pause on 'the' or the pronoun 'his'. We tend to fixate and regress to high-content words, i.e. those contr... |
What real reason is there for us to save the giant panda? | I just read a little while back that panda blood is found to be something like 100x stronger than any human made/found antibiotics. We know relatively little about these guys, and if they hold the key to something amazing, we'd be screwed if we just let them die. There were a ton of posts on different subs about Mosqui... |
Why do people love the 90s so much? | There are two reasons. It is recent enough to be remembered by most people, but distant enough to seem different to our time. It's the period of nostalgia that has the biggest market. This is nothing new. The '60s had the Waltons, the '70s had Happy Days, the '80s had the Wonder Years, and the '90s had That '70s Show. ... |
How do our hearts and lungs not get tired? | The body's heart and lungs are automatically regulated by the a part of the brain called the medulla oblongata, this part of the brain is fed by several arteries and it discharges bioelectricity generated on your brain to stimulate the muscles of the heart and lungs to move, these muscles are not like the ones you move... |
How did the astronauts take off the moon? | [This comic actually gives a pretty good explanation.] Surprise! Relevant XKCD. OK, so for a rocket to escape Earth's gravity, it must take off with enough force to launch it about 6000 km upwards. To escape the moon's gravity, you only need about 300 km. So, they didn't need nearly as large a rocket because they only ... |
Why can't we use gravity to generate electricity like we do with other renewable energy sources? | You have to have input energy to lift something up. The energy used to lift it would outweigh the energy generated by dropping it. You literally overcome gravity by lifting something. Now you can use gravity as a storage mechanism for energy, but you with our current understanding of gravity we wouldn't be able to use ... |
What exactly are "polygons" in 3D games? | Here's a good picture for getting an idea of adding more polygons to get a better looking game - [Diminishing returns with polygon count]", 'see the dolphin image here _URL_1_ more triangles = more detailed models. a cube can be made of 12 triangles I guess |
Does a car really need to be turned off before pumping gas? | Your check engine light could come on since the evap system is opened up with the engine running, and there's a slight possibility of static electricity buildup. |
In the English language, why do we spell "the Philippines" with "ph" but spell "Filipino" with an "f"? | I work in a car dealership. It's adorable, Filipinos call and ask for the farts department.Why do we spell Ptheven with a P?People always ask if my wife, from the Philippines, is Filipino I always say no she is not a Filipino cause she has no pino she is a pinaAs a long time English speaker There answer to these kinda ... |
Does the weather shifting from hot to freezing and back again actually affect my health? | No it can't make you sick. Some weather, like cold dry weather, can make it easier for a cold or flu virus to infect you, mainly by drying your mucus membranes while also making it more likely you will touch your nose and face. Some viruses appear to be more robust in cold weather as well. However weather alone cannot ... |
Why do models scowl while on the stage ? | Same reason why so many are built like cloths racks: the star is the garment. With the wild fashions, they have to act serious. The goal isn't to show what the cloths of the future will look like. |
how vaccum sealers work, and why they keep food fresh | Just to add, the easiest way of creating a quite good and cheap vacuum is with mason jars. Put food inside a jar, heat it by surrounding it in boiling water and put a cap on it. That way food will become mostly sterile and upon cooling, it'll create suction that makes air tight seal with the cap. |
Why would an internet connection go out at the SAME TIME every day? | Assuming your modem is connected to a router or is a router, most likely your lease time. It will be under your DHCP settings usually. Find router IP.Start command prompt , find your lease time, usually with the DHCP settings. Put in some big ass number. If that doesn't work I have no idea. New routers can have a relat... |
Why are birds so loud at 5 a.m, but then become near silent by 7 a.m.? | The [ambient noise] is typically at lower levels at 5am than at 7am. Once people start waking up, they will do things that make noise, which all becomes background noise that somewhat drowns out the sound of the birds. Another example: I live somewhat close to a highway. I can't hear the highway during the day, but I c... |
What does Jenkins really do, and how can I use it? | It compiles software. When someone breaks the software it sends them an email. Can also be used to run scripts checking eg. code conventions. At least that's what I use it for. |
Why is that the two hour long 1080p Blu-Ray movies are only a GB or two but the 15 minute long videos I film on my phone take up around 700 MBs? | Because the ones you're downloading are compressed to be easily transferable across the internet. Compressing a video takes a good bit of computing power along with time. Not to mention it's kind of an art to keep a video good quality while reducing the size. Your phone most likely also compresses the size of a 1080 vi... |
Why homosexuals refer to the person they're together with as partners instead of a wife/husband? | Some homosexuals do refer to their partner as their husband or their wife. In places which recognise the right of homosexuals to marry, that's actually more common in my personal experience. |
How is my brain able to go into this zoned-out "auto-pilot" state while I'm driving, yet I get to my destination safety with no real recollection of the trip? | Your brain works in a hierarchical way, where visual stimulus is processed by the lower level, patterns are formed, and compared against expectations. For instance, if you see nothing but the dotted line and trees moving, those are all predictable stimuli that can be handled by the lower levels. But if something a bit ... |
Why can I have sex at 16 but I can't watch porn until I'm 18? (NSFW) | The simple answer is the law isn't designed to make sense, and it does not actually need to. This is just one of several places where the law is poorly designed, leading to such odd situations.Because watching something has the potential to influence you, at least as far as legal systems go and if you are potentially i... |
why is Marvel changing old superheroes into other races and sexes? Why wouldn't they just create a new superhero to fit those groups? | They're not real people. These characters are characters in stories. Stories belong to *everyone* to tell and re-tell. Millennia ago, authors recognised that, in storytelling, there are only [Seven Basic Plots]. Everything you read, watch, see, hear, or write is going to be a variation on one — or more — of these seven... |
Why does the opening ceremony of the Olympics take place two days after the opening events? | I don't really care if I get down-voted for this, but *please*. This is what /r/askreddit is for. This subreddit is getting way too filled up with questions that don't belong here. ELI5, contrary to reddit belief, isn't the go-to place for answers. It's more for very simple explanations for rather complex questions. I ... |
Who's buying our personal data, and why is it so valuable? | Actuary here. I buy your data to do things like price insurance policies and build fraud detection models. That includes things like your credit score, level of education, homeowner status, location attributes, and so on, and so forth. I am one of just many parties who are interested in your data, and I'm just providin... |
If a Computer can verify an answer, why can't it solve the original question? | These are actually a classification of problem, and are central to one of the most important theories in computer science, namely [NP Problems]. They are problems whose solutions can be verified in polynomial but whose answers can't be calculated in reasonable time. /u/wildgurularry mentioned factorization, but **here'... |
Is each lock and key combination unique, or do I share the same house key as a bunch of other people? | Kind of along these lines- From the early 60's until 1986 Ford only made 135 different key combinations. I worked as a repo man back in the 1980's. We could buy a box of Ford keys that had all of the different cuts, one on each side of the key, so there was a total of 68 keys. When repo-ing a Ford, you just get in and ... |
Why does it hurt to drink water when I have a sore throat but it doesn't hurt to drink Gatorade or fruit juice? | My guess is that given flavours containing citric acid cut through the mucus build up, meaning you don't have to use the inflamed muscle tissue to the same degree to swallow and clear mucus build up. Basing this on having had such a bad case of glandular I was hospitalised because my throat almost closed over - the onl... |
How does electricity find the path of least resistance, and can this be used to solve the Traveling Salesperson problem? | Computer engineer here, Electricity does not follow the path of least resistance, it follows all paths. The lesser the resistance, the greater the current. The electromagnetic field is defined at all points in space. It also propagates very quickly, at the speed of light in a vacuum. As the field propagates, the curren... |
When animals see something like the Grand Canyon, Yosemite, a nice sunset, do they stop and appreciate the view? Or is this behavior exclusive to humans? | Most animals don't have the focal distance to see the vast grandeur of nature. Take a dog. 2 color cones. And limited vision distance. They don't need to see very far to be effective. Yet they do need lower light vision and wide field of view. Cat is even worse. Less focal precision. Less color. Less distance. Better l... |
Why don't computers come pre-overclocked? | There are some video cards that come pre-overclocked. Additionally you're able to even boost those past what the manufacture does. Currently I have an nvidia 560 TI overclocked edition, and I have overclocked it further. I also have an I-7 3770K cpu which is not overclocked by the manufacture but it is unlocked to be o... |
Why are people banned from living "off the grid"? | You can live off the grid as much as you like, but you can't live on public land , you can't live on private land without permission from the landowner , and if you are the landowner you're going to be paying property tax or you'll have some interesting visitors coming by. The only places you can really do this are pla... |
How come we can't view the items left behind on the moon through a telescope to prove the landing wasn't faked. | Not telescopes, but lasers can. There's a couple of laser refelctors left on the moon that various institutions use to do things like measure the distance between the earth and moon for intro astronomy courses and for various research reasons.Jupiter is REALLY big, and we arnt getting close up shots either. It wpuld ta... |
why do we only see fog when it is at a distance? | Nah, you see it right there in front of you. Have you never walked through fog? It's beautiful. |
Why most animals can walk after birth but human babies and some others take a long time to learn? | So over many many generations, humans slowly started walking upright, they also had brains which got larger and larger. Because of the first thing, the birth canal got smaller, and because of the second thing, babies heads got larger. Because babies get larger and larger during development they weren't able to be born ... |
why can people drink coffee at the same temperature that can cause burns to the skin? | Some people have good points but I'd like to add something on. When you have a cup of hot coffee, it's not all uniform in temperature. The top of the coffee loses heat to the air making it a bit cool. When you take a small sip, your typically just drinking this slightly cooler part of the coffee. You can probably stick... |
What changed to enable supercar engines to basically double in power from ~600hp 10+ years ago to the 1,000 - 1,3000hp you see today in Bugattis, Koenigseggs, etc.? | The biggest factor is simply put computers. WW2 airplanes had superchargers and turbos and made 2500+ horsepower. It's a simple concept, more air + more fuel = more power. In modern engines it's all about controlling the air fuel mixture precisely. Things like direct injection and independently controlled valves have m... |
Why do hearing common sounds such as people smacking, coughing, sneezing, and breathing loudly anger me? | I feel this way only when I'm irritable. Most of the time I don't care, even if I notice. But when I get tired or frustrated then things like that bother me. My feeling is that the sounds trigger a response, they're like a bit of an imposition. There's a part of my mind that has to decide, is this a sound that I have t... |
Why do so many seemingly-unrelated issues have clear stances associated with the left and right | for each of these issues we can find some reasoning behind why the sides lined out like they did, but for the overall question of why every issue seems to have opposing sides in the opposing party that is just politics. by which i mean that if an issue is controversial that means that by it's very nature there are peop... |
What is entropy and how does it apply to our daily lives? | This is the best ELI5 I can think of: You know how you headphone cables get all messed up and tangled? That's because they have more different ways of being messed up than they have of being ordered. Therefore if they go in a random state, they're more likely to be messed up. Entropy is a measure of how messed up and t... |
300 hours are uploaded to YouTube every minute... Plus Google's endless syncs and free Drive storage. Do they have a great wall of hard drives constantly under construction or something? | Hmm, I was curious how fast they have to add new drives so I did a Fermi calculation: * 300hr HD video / min = 300hr content * 4GB/hr * 60min/hr = 70TB content/hr* 70TB * 2 / 4TB/drive [Enterprise drives I found typically went up to 6TB] = 35 Drives Installed / hr - > ~ 1 Hard Drive per 2min So, even they were rushing ... |
why do so many parents (dads especially) dislike/have a problem with their son or daughter being gay? | I don't know why everyone is jumping on the homophobic aspect You need to realize also if you are the only child or only male in the family then you won't carry on the family name and blood line. |
What is the point of hiccups? | They don't have a point or a clear cause, and hiccup cures are all totally psychological as far as anybody can figure out. |
Why do big-name actors take god-awful roles? | Some reasons 1) Money - Probably the most obvious reason, big budget productions can afford to spend money on big names and invest less into the actual quality of the movie. That being said, I would think it unlikely that an actor would go into a project knowing it was going to be really bad unless they 2) Scripts - Fo... |
How old people deal with the fact that they're going to die soon | I'm 70 and know my time is coming, when I don't know. I'm ready and not afraid. I never have been afraid of death since I died as a child from a swimming accident and my father brought me back. I fell on a dock post and was knocked out then falling into the water. I saw my dad jumping in to pull me out and carry me up ... |
Why is it OK for consumers to boycott companies based on political agenda, religion, race, etc, but businesses are prohibited from discriminating against their customers? | The entire United States is covered by the Federal Civil Rights Act of 1964, which prohibits discrimination by privately owned places of public accommodation on the basis of race, color, religion or national origin. Places of “public accommodation” include hotels, restaurants, theaters, banks, health clubs and stores. ... |
Instead of eating regular meals, can I just drink protein shakes with a lot of calories? | That's the idea behind Soylent We've been on a DIY version since October and have been very happy with the results. We still eat regular food, but now only for fun. The official Soylent will be released probably at the end of this month, although the date has been pushed back many times. Here's the Kickstarter link for... |
What's so difficult about being a NASCAR driver? | I had the same thoughts until I went to the Richard Petty NASCAR driving experience. The car wasn't necessarily that difficult to drive at 3/4 of race speed on an empty track but add 40 more cars at full speed I'd say that the level of complexity increases rather quickly. Also, the Richard Petty NASCAR driving experien... |
How are we able to see distant galaxy's and stars yet completely miss another planet in our solar system? | Stars give off light, and galaxies give off millions of times as much light. Planets can only reflect light, and a small distant one doesn't reflect much at all. Which is easier to see on a moonless night. A chair 50 meters away or a flashlight turned on and pointing at you 100 meters away?", 'Stars: billions of times ... |
Why do injuries hurt when weather changes occur? | Before we try to explain this phenomenon, is there a reason to believe it is real and not just confirmation bias? A lot of people probably notice when their pain coincides with bad weather, but don't give it a second thought when the weather is fine and they still have pain, or when the weather is bad, but they are pai... |
Why do certain depressed people feel the need to trick people into thinking they're about to do something bad? | Based on my experience , typically people who engage in these behaviours are experiencing extremely painful emotions that they are unable to express directly. It's often most useful to interpret disclosures of suicidal fantasies or claims of suicidal intent that isn't obviously present not as lies or faking but as a tr... |
[NSFW] How does a guys junk not get crushed between his legs while running? | Gotta wear tight boxers or a jock sttrap. Twice I've went for a run while nude on my treadmill and each time I wasn't able to workout for at least a week, because of the worst testicle pains even from walking. Never again..Never actually though about this but the underwear keeps it together. Ive never run naked so cant... |
Why do I salivate out of control when I'm extremely nauseous or before I throw up? | It protects your teeth. Vomit is acidic stomach contents. Saliva is slightly alkaline, so neutralises some of that acid before it damages your teeth. Some of the damage still occurs despite the saliva. Psychiatrists can look at people's teeth to see whether they might be bulimic.It has to do with the nerves that run fr... |
Why aren't there rocky planets the size of suns? | Because once something gets above a certain size, gravity tends to cause it to collapse in on itself, which causes fusion, which causes heat and light, which causes the object to be a sun. There are some cases where the line is a bit blurry but essentially, the line between what is a sun and what's a planet is a matter... |
I've heard since you're constantly losing and regenerating cells about every 7 years you have a completely new body. If this is true how are tattoos permanent? | If you look at skin biopsies from tattooed areas under the microscope, you can see ink particles within macrophages in the superficial dermis. These guys are quite good at rather non-specifically mopping up foreign material of this sort. Some will migrate into nearby lymphatic vessels- and you can even sometimes see ta... |
why does paper have weird sizes? | A little interesting fact - as the area of A0 paper is almost exactly 1 square metre, the weight of a piece of 80gsm A0 paper is 80g. So a piece of A4, which is 1/16th of the area of A0, weighs exactly 5g. So if you're posting something which is 20 pages of A4, you can quickly work out that it weighs 100g |
Why do Microsoft & Google spend $$$ making free browsers? | I was confused as to why Microsoft were advertising IE9 on TV. As far as I know it's exclusive to windows, and is part of windows by default. Seems like a waste of money to advertise it.ELI5: Why did you think you should write "$$$" instead of money?It started around the time of Netscape. Netscape used to give a away t... |
Why don't we already know everything that's inside the pyramids? | The recent temperature anomalies in the news were in Tutenkamen's tomb which is located in the Valley of the Kings, not in a pyramid. |
Why is "suction" not considered real in science terms? | Pressure is a force. Suction is the absence of pressure, just like cold is the absence of heat. It is real, in the sense it is a thing we can measure. But there isn't any sort of special force of attraction that makes it work, it is simply the absences of the repulsive force of pressure. |
Additions to Japanese Names (-san, -kun, -chan etc.) | -San is used for just about everyone. It's like Ms. or Mr., but it's also used when you don't know the person you're talking to too well, or to show respect -chan is used for girls, up until they're about old enough to graduate college -kun is for boys into their teens, and, less commonly, subordinates in a company -se... |
Why does my N64 look so much better on an old CRT than my 20" LCD flat screen? | the N64 was part of the last generation of consoles to have analog output only, and was made to work with an analog TV, so it has lots of little tricks in the graphics that would take advantage of analog's impreciseness to hide bad-looking bits Modern TVs are digital, and while they're compatible with analog the tricks... |
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