Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
How is it that food companies keep the taste of their products consistent over years?	[ "When you see \"New and Improved\" or \"Now with more buttermilk flavor\" on the package, what it actually means is \"We switched to a cheaper recipe or otherwise couldn't maintain a consistent flavor\"" ]	[ "Nielsen does this, they tell you how on [their website](_URL_0_), but basically they just randomly select people and track everything they do by asking them to write down everything and walk around the streets with microphones to record whatever people are listening to. They aggregate the data and produce the rati...
Why is it theft if I accidentally walk out of a store with an unpaid for item, but if a store accidentally charges me twice for the item its considered an accident?	[ "It isn't theft if you accidentally walk out of a store without paying. Theft requires the specific intent to deprive the rightful owner of possession. Meaning, you have to know and intend to take the item. If you walk out accidentally, that isn't theft. If you later realize you forgot to pay and keep the item, now...	[ "Imagine you are made of genetic soup. Some people have ingredients that just don't go well together and make the soup taste bad. But that's ok, because when you have a kid, we just take some of my soup and some of my wife's soup and pour it in together. So even though my soup has some bad ingredients, her ingredie...
Why do banks make people fill out a deposit slip at the teller's window, then make them use the ATM card reader, when customers don't have to fill out anything at the ATM to deposit checks?	[ "Where it's used, it's accountability for the teller. Essentially you fill out the slip with $XXX dollars on it, then when they process the document the receipt is printed on the same sheet and should reflect the same amount. That way there is a cross-check and verification that both of you agree how much money was...	[ "Modern washing machines have sensors that judge the weight and sometimes the amount of dirt in the water. They don't judge these until it starts operating, and they may or may not update the time after the initial prediction. In addition, they may be judging the temperature of the washwater and spending time heat...
How Exactly Does Viagra Work?	[ "Sildenafil is a vasodilator, meaning it makes your blood vessels expand, increasing blood flow. A penis is very vascular, so an increase in blood flow makes it much easier to get and maintain an erection" ]	[ "I could try to explain it to you, but this video is all you really need: _URL_9_" ]
Why do glasses get so sticky when I stack them while they are still wet?	[ "Worked in a bar for years. The reason why they stick is because the glasses are warm and wet. When they cool down, the trapped air in between the glasses cools and condenses. Normally, the space glasses might let in some air, but because of the water that forms a seal, no pressure is relieved. Effectively you've f...	[ "Hydrogen bonding! In a solid state, the average kinetic energy of water molecules is low enough that hydrogen bonding can happen. This creates a highly ordered crystalline structure with lots of space between molecules. In liquid water, however, the kinetic energies of the molecules overcome the hydrogen bonding e...
Why aren't we dumping our nuclear waste in space?	[ "It takes a ridiculous amount of energy to put a single pound of stuff into a solar orbit. And even then, the thing doesn't just disappear. It orbits the sun until it's perturbed into an encounter with something. Like, say, the Earth." ]	[ "The biggest problem is divergence. When you shine a laser across a room, 1 mrad of divergence (1 part per thousand) seems pretty small, but when you shine a laser 250,000 miles onto the moon, the spot is 250 miles across." ]
Why do doctors tell you to finish a course of antibiotics?	[ "Antibiotics don't always work immediately. They'll kill most of the bacteria right away, but a few are stronger and take more time to kill. You'll start to feel better within a day or two, but you actually still have bacteria in your body and if you quit your antibiotics too soon, they will start to grow and multi...	[ "It's just done to give prominence to that actor. A lot of that crediting stuff originated with Jonathan Harris in Lost in Space. He didn't like being listed last in the credits, so he had them credit him as a \"Special Guest Star\" in every episode of the series - it made him more prominent in the credits. Nowad...
if roll bars and roll cages protect stunt car drivers, why aren't they mandatory for car munfacturers?	[ "A roll cage is a pretty ugly thing that impinged on the interior space and access. What car designers do is build strength into the A, B and C pillars. If you cut the roof off a car you will see folded and ridged steel sheet. This is as strong as a roll bar in the type of accidents expected in a normal Road accide...	[ "I may not be a planetologist, but I think there's a big reason that everyone else is missing here. Mars landers are fragile things. The last thing NASA or anyone else wants to do is have one crash into a big boulder or topple over on a steep hillside. So NASA very specifically chooses landing sites they know _lack...
Is caffeine tolerance mainly caused by the increase of adenosine receptors, or do other biochemical changes play a significant role?	[ "I cannot speak too much about adenosine receptors, but I will say that this is probably very complicated, because in addition to adenosine antagonism, caffeine affects [GABA](_URL_3_), [dopamine](_URL_0_), and [serotonin](_URL_2_) transmission. Classically, drugs of abuse increase extracellular concentration of do...	[ "In SPR you're hitting the underside of a thin piece of metal with light and measuring the light that is reflected back. Do this at a bunch of different angles and you get an SPR curve. When you modify the other side of the sensor, through say, binding an enzyme to it, you affect how the light resonants through the...
Why does Carbon-14 have a longer half life than Carbon-10?	[ "Distance from stability is not the sole determining factor in the lifetime of a nucleus. As a side note, ^(14)C decays by beta minus and ^(10)C decays by electron capture. Neither emits positrons." ]	[ "There are a number of ways that scientists can use proxies to estimate temperatures - a proxy is just a known ratio of isotopes or minerals that changes depending on temperature. The wikipedia page for the Paleocene-Eocene Thermal Maximum goes in to a couple: \"Precise limits on the global temperature rise during ...
How did the Habsburg house rise from regular nobility to a major dynasty which ruled the Holy Roman Empire and most of Europe?	[ "There was a similar question a while back and this was my answer: Marriage. The Habsburgs were extremely adept at creating important political alliances through marriages to other powerful states in Europe. These alliances gave Austria quite a bit of leverage over and claim to many states as well as those states' ...	[ "I wrote a detailed response about Tom Holland's documentary [here](_URL_0_), using primary source to argue that something very similar to modern Islam did exist quite early on. Also worth noting that Crone and Cook's Hagarism thesis is not taken seriously anymore (or even at the time) - it literally used only th...
How do scientists measure extremely high temperatures?	[ "This is my area of research, hot plasma temperatures. In general for really hot things you measure the emission spectrum at a particular wavelength and then find how much broadening there is due to the doppler effect. This is directly related to temperature as long as the energy distribution is a maxwellian (i.e. ...	[ "They don't. They have really really good camera's that can take a picture from really far away." ]
sometimes when the radio is staticy but when you put your hand against it, it starts working normaly again. same with antenas why does that happen?	[ "You are basically using your body as an extended antenna. The bigger the antenna, the better the reception. An antenna is just a conductor that transmits radio waves. Bodies are not great conductors, but they're better than nothing, and your body is much bigger than the tiny metal antenna on most radios." ]	[ "Not all parts of the web are sticky. If I remember right (since I'm too lazy to google it right now) the radial stands (the straight ones from the middle out) are not sticky. The circular strands are. The spider just walks on the radial strands" ]
Why are there swarms of tiny bugs hovering/flying in seemingly random spots? What are they doing? Why are they there and not elsewhere?	[ "The long and the short of it is that those gnat swarms are generally a swarm for mating time. The males and females live in different areas and in some species, the males travel in swarms to attract females to the location to spread their genes. [Here's a good reference for the answer](_URL_0_)" ]	[ "From what I know, it comes down to the pheromones each ant produces. Basicly imagine every type of ant (soldier, worker, breeder, whatever else) leaves behind a special pheromone (smell). This mix should leave a balanced scent for the ants working. It's the same way they locate food consistently. Basicly they use ...
why are insects attracted to bright lights at night?	[ "Several insects navigate using the position of the sun (and moon) as a reference point. Sun is relatively stable on the sky, only moving as the earth revolves during the day, so when you move 100 meters in one direction, the sun is still in the same place relative to you. But if you have a lamp and move 100 meters...	[ "Think of it like static electricity pulling hair to a balloon. There's an additional force involved other than a mechanical grip from hooks on their feet. Size helps too. The smaller the bug the easier it is for them to \"stick\" and grip." ]
Dear Fellow Five Year-Olds, please stop asking science questions. There's already a much better subreddit for that.	[ "But people posting science questions here want to be able to understand the answer." ]	[ "Not LY5, but [here](_URL_0_) is what it's about. The products are likely totally safe in reasonable quantities, and this law results in those signs being displayed all over the fucking place, negating the whole purpose." ]
Why are reddit's servers continuously down?	[ "Because the interim ceo of reddit is Ellen Pao, and she absolutely loves money, and gives zero shits about anyone else." ]	[ "To put simply, infrastructure costs and up keeping requires a huge amount of money. Which cannot be covered by advertisements ." ]
Why does America mostly use traffic lights at intersections when Europe uses a lot of traffic circles? What are the benefits to either?	[ "I think roundabouts are fucking horrible, but people seem to like them. IMO, roundabouts trust more heavily on the good judgement of drivers to be able to merge into and out of traffic, whereas light just dictate exactly what to do at any given moment. This makes you less susceptible to minor accidents but enables...	[ "Up until the 90s Doctors heavily recommended circumcision in the US and most people simply do what the doctor recommends. There is not real religious motivation to is despite what many claim, it is simply that the doctors say it is good so it must be good. You also have social inertia that you must overcome. It i...
If Atlantis didn't exist, why do we have various research conducted on it?	[ "If your purpose is to debunk Atlantis, you can point out that it was not mentioned first by an ancient historian, or by a quasi-religious poet, but by a philosopher who was fond of extended allegory (Plato) in an extremely speculative philosophical dialogue(\"Timeus\"). People hear that some ancient guy said somet...	[ "Governments give tax breaks and subsidies to corporations to lure them in to their area. The idea is that bringing that business to the area will, ultimately, bring more business and jobs to the area which, theoretically, will bring jobs to the locals and more tax revenue for the government. Again, theoretically, ...
Why do people have the urge to grab cute babies' cheeks and smush their face?	[ "[This article explains why.](_URL_0_) TL;DR \"Cute Aggression\" is the brains response that could be protective, or a way of venting extreme feelings of giddiness and happiness" ]	[ "There are several factors at play here: - The square-cube law shows that force does not scale with size; that is, larger objects tend to not resist stress as well as smaller ones. (Hence why big cars perform poorly as compared to smaller cars in crash testing, why a building would fall if you built a larger scaled...
Attending high school in the South, I was taught that Abraham Lincoln's nickname of "Honest Abe" was actually sarcastic at the time. Is there any truth to this?	[ "Far from it. There are many stories of Lincoln being honest and respectful. Some that I can find are when he short-changed a customer and personally went the distance to give him back his money; When he became a lawyer, the time period was well-known for dishonest lawyer, and he set out to keep his honesty, even a...	[ "Isaac Newton, being arguably the most famous physicist aside from Einstein, is an obvious choice for scientists respected by Einstein. I will not elaborate on Newton here, as I think there is a more interesting choice. Here is an article detailing the profound respect Einstein had for Newton: _URL_1_ One scientis...
Why do people spray perfume on their wrists/neck?	[ "According to [Perfume Station](_URL_0_): > How should I or where should I apply fragrance? > Surprisingly, women are not sure where to place the fragrance. Fragrance should be applied to pulse points. This is where the blood vessels are closest to the skin giving off more heat and acting like mini fragrance ...	[ "Nostalgia, too ~ a lot of older guys that now have lots of money are reliving their youth - they either had one when they were young & want another, or wanted one when they were young and can now afford to pay the big bucks to get one." ]
The difference between Evolution and Natural Selection.	[ "Evolution is the process of living things changing over long periods of time. Natural selection is the phenomenon of organisms that are more well adapted for their environment living longer and having more offspring. Natural selection is the mechanism by which evolution occurs." ]	[ "Surface area difference of food to taste buds/nasal passages. Sipping a drink versus chugging a drink makes for very different tasting experiences." ]
I want to get married in 14th century England. What do I have to do?	[ "What social class is Bob? It makes a difference." ]	[ "You may be interested in some of the threads in the '[Early firearms](_URL_0_)' section of the Popular Questions pages." ]
why is it so hard to run trains dependently and reasonably priced?	[ "Ha, I wrote a paper on this once. If I had to boil it down to one cause... I would say its the fact that in the US railroad infrastructure is (mostly) owned by private companies, which is fairly unique in the world. The US has the most sophisticated and impressive freight railroad transportation in the world (thin...	[ "The rocks can flex against each other. Solid earth (or when mud fills the spaces between the rocks) won't flex, and the ties work themselves into loose holes. There are [machines](_URL_1_) that stir up and clean the rocks under live tracks to keep them flexible." ]
- Why does applying moisture (like licking) supposedly help a suction cup stick to a wall/surface?	[ "The moisture fills in small gaps caused by imperfections I'm the suction cup and glass or mirror. This keeps air from moving under the suction cup, and the air pressure pressing against the cup keeps it stuck to the glass ." ]	[ "[This](_URL_0_) previous thread explains it as [entrainment](_URL_2_). When changing the diameter of your lips, the airflow is subject to the [Bernoulli effect](_URL_1_) where it speeds up. When the air moves faster, it draws in more surrounding air which is cooler than your body temperature, thus making it feel c...
Why the L.A Metro is not portrayed as much as other underground systems in movies?	[ "The L.A. Metro only has a handful of underground stations, the rest are above ground. New York and London each have hundreds of underground stations, while L.A. has maybe a dozen. Also related to that, in New York and London you can get anywhere in town using their subway system. In L.A. it only serves a few n...	[ "Someone will take a picture or count the number of people within a given area. More likely in several spots. Then they will work that into an equation that estimates the number of \"areas\" it would take to fill the total area occupied. People tend to distribute themselves fairly evenly at large events, so these s...
Why do we have birthmarks?	[ "ELI5: We aren't quite sure Birthmarks are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocytes. The exact cause of most birthmarks is unknown, but vascular birthmarks are not hereditary. They are thought to occur as a result of a localized imbalance in factors contr...	[ "There are a lot of scientific answers here; I think a quote from Peter Ustinov's character in the movie \"History Boys\" might also shed some light on it: [\"The best moments in reading are when you come across something - a thought, a feeling, a way of looking at things - that you'd thought special, particular to...
Why did countries like France and Russia become unified countries quite early on, but Italy and Germany only unified late in the 19th Century?	[ "Depends a lot on what you mean by \"unified countries.\" Most of France didn't speak French until the late 19th century. I think you may be overestimating the level of cohesion in France (though I don't know enough about Russian history to speak to it). Add to that the fact that Germany did have a central ruler in...	[ "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 boxers hug eachother? And what makes the referee break up the hug?	[ "It's a technique to tie your opponents arms inorder to break your opponents momentum or to take a breather and such.. it's called clinching and its technically illegal hence the referee breaks them up. It's tolerated if you aren't using it excessively." ]	[ "Well, back in the day, you didn't really have pay per view. You either paid for the channel (including less racy channels like HBO) or you didn't. If you paid for the channel, a technician came out to your cable box and installed a descrambler, which decrypted the signal and allowed your channel. The signals were...
r/Askscience, I need your help. Can you please explain in easy terms why this is a bad idea?	[ "There are always a number of ways to debunk these kinds of devices, and perhaps someone will do so here. However, your father sounds like the type who will not be swayed out of his beliefs. As many people say on reddit, \"you can't reason someone out of a belief that they didn't reason themselves into.\" Is there ...	[ "Chemical reaction to oxygen. Like you are five: Once the stuff inside the compressed tube meets the air...it goes all crazy and changes." ]
When pushing against something in space, do you have the same speed as the object moving away from you?	[ "You have the same momentum, not the same speed. If you pushed off of an object of the same mass as yourself, you'd have the same speed, an object with less mass would be moving faster than you, and a heavier object would be moving slower." ]	[ "only if it's structure is perfectly non-[amorphous](_URL_0_) so that it wouldn't start contorting with the inertial effect commonly known as the [centrifugal force](_URL_1_). This would rule out glass and many plastics Also it would have to also be in a perfect vacuum so that air resistance, or friction with the a...
What is so hard about calculus?	[ "It's not that calculus is hard and confusing in itself, but rather that calculus builds on a foundation of the math that you learn before it, like algebra, trigonometry, functional analysis, etc. So if you don't completely understand the foundations, you will have a hard time understanding calculus." ]	[ "You know how people thought there's some angry god that throws lightning bolts when you do or don't do something? Well people are afraid of things they don't understand." ]
How does the lottery (like Mega Millions in the US) benefit schools, etc.	[ "In most states its split 50/50 between the state and the prize. The mega millions is country-wide, so I don't know exactly how it's split, but I would assume its similar. Kind of hard to believe they sold 1.2 billion tickets though, so maybe not. Edit: wow, the drawing is over and I just saw that they actually sol...	[ "Have there been more than normal? I don't know if there's anything out of the ordinary. The media will often take any discovery in cell and molecular biology and apply it to the treatment of cancer, and researchers funding often comes from the treatment of disease. Sites share what sounds interesting, and I might ...
Were there plans in place of how to deal with Hitler had he been captured alive?	[ "Marshal Zhukov promised Stalin he would bring Hitler to Moscow in a cage. > Anticipating victory, Zhukov promised to send the captured Adolf Hitler in an iron cage through Kiev on his way to Moscow; however, the Fiihrer had anticipated the fate prepared for him an took poison, and Zhukov was not able to fulfil th...	[ "[This thread](_URL_1_) has some good information about it. Basically though, no one is really certain of the route that they took through the alps, which makes it difficult to choose where to look. And actually, any remains found of elephants would probably give a more definitive answer as to the route. Also, bein...
What was the Old Fashioned cocktail called before it was old enough to be old fashioned?	[ "Pre-prohibition the Old Fashioned was simple the Whiskey Cocktail. There were a few different ways to make it, but basically it was a sugar cube muddles with bitters, with whiskey and water or ice. After prohibition it became known as the Old Fashion/Fashioned because it was the classic whiskey cocktail, as oppose...	[ "If you are talking about on TV then that is the wagon wheel effect. Basically if a hand on a clock were spinning so fast that in frame1 the hand was on 6 then in frame2 it had rotated, clockwise, all the way around to 5, when played back it would appear to have gone backwards, when really the camera simply missed ...
At what speed would a car need to ne traveling at to appear as if the wheels are not moving?	[ "It depends on the shutter speed, first of all. Assume the shutter speed is 1/60 s. Also, you have to factor in the size of the tire, not just the rims. 17\" rims can easily support tires with 25 inch diameters. If you're going for a full rotation, the car has to travel 25pi inches (one full rotation of the tire...	[ "There are two things that are going to have an effect here. 1) Doppler effect (which depends on the relative locations of you and the stationary observer) 2) Relativistic effects (time dilation primarily) In any case, the effects will likely result in the fact that the radio reciever won't even recognize your sign...
why do I always wake up from a dream immediately before I suffer some kind of fatal physical harm (ex. someone shoots me, stabs me, hits me etc.)	[ "It's because your brain is reacting to the fear of the situation. It's like \"Oh! Bad situation. Done!\" so you wake up. Your mind doesn't want to go through that, and you've never experienced it, so you also don't know how to react. :)" ]	[ "To confirm that you're ready. What if the game just started and something came along and killed your guy?" ]
How do eyelashes “know” when to stop growing?	[ "The growth of eyelashes occurs in three phases, when these phases start and stop is genetically controlled. See the published report below, scientists 'know' some aspects of the process, but some details are currently unknown: _URL_0_" ]	[ "Technically, Daddy Longlegs aren't actually spiders, they belong to an order called 'Opiliones', whereas spiders belong to the order Araneae. Both are arachnids, however. I'm not sure, but I don't think Daddy Longlegs, or Harvestmen as they're more commonly known, spin webs on any sort of regular basis. That said,...
When public bathrooms are moving more to no-touch required basins \ soap dispensers \ dryers, why do 95% of the doors open inwards, so that you have to pull a handle as you leave.	[ "Doors that open outwards may be blocked from the other side. So, a person may be trapped inside by being unable to push. By opening a door inwards, it greatly reduces the chance of the door not being able to be opened. A bathroom tends not to have any secondary exits. This is a researched guess on my part." ]	[ "Modern slot machines are entirely computer driven. When you pull the arm/press the button, the outcome is determined from a programmed odds table and all the spinning stuff on the screen is purely for show." ]
How do tornadoes form, and sustain their vortex?	[ "Ever watch water going down the bath tub drain? Even though the water was relatively motionless before you opened the drain, the low pressure area you introduced by opening the drain causes a rotating vortex to form in the water. Tornadoes work in much the same way. They're associated with low pressure areas, afte...	[ "Watch this video by Veritasium: _URL_1_ I think it answers your questions." ]
Why is Ritalin prescribed to hyperactive kids?	[ "Can I ask another question branching off from this? I am a teacher and I often see antisocial behavior from kids who are taking medications like ritalin or aderall. For example, persisting in annoying and disruptive behavior even when told to stop by their peers. For example, a kid is going up to other students an...	[ "They don't. It's a marketing ~~lie~~ gimmick. I used to work for a company that did a similar thing by mail. New customers were supposed to sign up by a certain time for special rates but as a specific matter of policy we'd give those rates to anyone who mailed back the special offer." ]
How is it possible for panic attacks to manifest similar symptoms to a heart attack if there aren't any other underlying health factors present?	[ "That is essentially due to stress. When you are normally stressed, your body create stress hormones which make you more receptive to danger, more reactive, make you feel fear, and prepare your muscles to an intensr activity (if you need to run away). It's totally chemical. About panick attack: It happened to me a...	[ "Awesome question, you’re right that the research about this kinda sucks. If you are good at interpreting/understanding research articles then check this out, if not then I’ll cover the details below so don’t worry: _URL_0_ Generally, research of this nature is done using model organisms, in the case of this study...
When someone loses a limb, how do the arteries and veins form a closed circuit again once the wound has healed?	[ "Arteries and veins are not connected end-to-end like plumbing pipes. As an artery gets further from the heart, it constantly has smaller and smaller vessels branching off from it. Those vessels themselves branch smaller and smaller, eventually becoming the microscopic capillaries. At the opposite end of capillar...	[ "Let's say you wanted to gamble at the horse track. You think Three-Legged Limpet is the horse to win on (despite having only three legs). You decide to place a $100 bet, but you don't have $100 on you now (payday isn't until tomorrow). The bookie agrees to take only $20, with the understanding that you will pay up...
When I take a picture of something at regular 1x zoom, why does the picture always look really zoomed-out in relation to what I see with my eyes.	[ "The 1x/2x/10x/etc measurement is in reference to the camera's lens, not the human eye. So when a lens is at 1x zoom, that simply means that that particular lens is fully zoomed out. The lenses in cell phone cameras (as well as consumer grade \"point and shoot\" cameras) have a fairly wide \"field of view\" (how fa...	[ "It's nighttime. Here, have a telescope. See that building way over there? You can pick out details in the rooms that are lit, maybe even see people, what they're doing, etc. Now using the telescope, in your own dark room, find your car keys." ]
Why does roast beef sometimes have shiny rainbow colors in it?	[ "When light hits a slice of meat, it splits into colors like a rainbow. This is something called a \"diffraction grating,\" essentially what happens when light waves bend or spread around a slightly pitted surface and create a pattern. It's the same thing that happens to make rainbows on the surface of a DVD. It is...	[ "Actually, Isaac Newton studied the exact thing you are talking about. It's called a phosphene, and it's created by the stimulation of the retina by means other than light, such as a magnetic field or an electric current. In your case, it's simply the physical pressure exerted on your retina. [Source](_URL_1_)" ]
What happens in the brain when a music album "grows" on you?	[ "There is a Radiolab episode that covers this topic fairly well. I'm pretty sure this is the episode. _URL_1_" ]	[ "I'm not 100% sure, but I feel like it's because the person who sang it perfectly is really only interested in getting all the notes and stuff correct. Whereas the other, just wants to sing it whether it's perfect or not. It's sort of the same with jazz music. There's white jazz, and there's black jazz... White jaz...
Why isn't the moon warmer, if the sun is always shining on it?	[ "the atmosphere it has is basically insignificant when it comes to holding warmth. it's practically a vacuum. it might be a fraction warmer compared to complete outter space, but nothing worth mentioning." ]	[ "If they're like cinnamon rolls where i'm from, it's because the crusty exterior has very little water content, compared to the soft dough inside. A Microwave heats by exciting the molecules in the food, those that get most effected are liquids (water), fats & sugars." ]
how do writers address actors when they write lines about their bodies?	[ "An actor's body is an instrument they use to do their job. A good actor needs to be comfortable with their instrument, and be able to objectively understand what they are bringing to a role. If you see an overweight (or short or bald or homely) actor, they are typically hired specifically because they have that qu...	[ "Not a computer scientist, but your question inspired some searching and here are my results: This does appear to be a [recognized issue](_URL_3_) in [speech simulation](_URL_1_) - (paywalled review [here](_URL_5_)) [It's especially a problem when simulating the physical movements to produce image in addition to ...
When you spill food or drink on your clothes and it permanently stains them, what exactly is left over when the stain persists but the food/drink is all gone after washing?	[ "If something is actually permanently stained, it means that the color dye from the food or whatever you have spilled(whether it be a natural or synthetic dye) has changed the dye sites in the fabric. It has to do with the way that fabric is dyed. Some of the more stain resistant fibers(synthetic polymers) use a pr...	[ "If you break down the ingredients in a cheeseburger with ketchup, you get mostly beef, milk, tomato, and flour, along with a few other things (vinegar, egg, salt, etc). Using mostly these same ingredients, in different proportions, cooked differently, or with different additional ingredients, I can make a pretty b...
How does your ping, download speed, and upload speed come together to create your internet experience.	[ "Google limits the buffer length for videos, since a lot of people let videos buffer just to close the tab, which probably costs them a lot of money / bandwidth. On top of that, a lot of ISPs are throttling Youtube due to the amount of bandwidth it causes in their networks." ]	[ "The countries in the Universal Postal Union have agreed on common standards. If I pay the proper international postage rate in the United States, then any postal service will deliver to the proper address in their country after receiving the letter from the U.S. Postal Service, regardless of the local postage rate...
How can 8oz of Diet Mountain Dew have 0 calories, but the 20oz bottle have 10?	[ "[Crazy Food Laws](_URL_0_) There are specific rules and regulations in how a company must list the Caloric information on their products. Calories must be listed in 5 calorie increments up to a total of 50, anything beyond that must be in 10 calorie increments. Weirdly, anything below 5 calories can be listed as 0...	[ "Binding energy from the nuclei. Binding energy is negative. In proton-proton fusion p + p - > d + e + ν_e, the mass of the products (deuterium + electron, neutrino is basically massless) is lower than the sum of the masses of the reagents by 0.42 MeV - remember that mass equals the internal energy (that's what E=m...
why do the Wizards in The Hobbit/LOTR rarely use their powers in combat, preferring to use swords?	[ "Maybe it's the same reason Legolas prefers walking on stairs as opposed to floating rocks" ]	[ "As a wind farm developer, let me direct you to the proper resource: _URL_3_ Essentially: > \"Wind turbines extract energy by slowing down the wind. For a wind turbine to be 100% efficient it would need to stop 100% of the wind - but then the rotor would have to be a solid disk and it would not turn and no kinetic...
How come pirating sites don't go down or take long to go down?	[ "Because the sites themselves aren't hosting any illegal content. They're just linking to it." ]	[ "Because the law required them to be back-ward compatible with anything and everything ever invented. And people expect them to look a certain way, so they keep it up. And because it's a lot of time from Very Important Useless People (congressmen) to change the law for something that's really not that important. Am...
Why do we easily confuse (left/right) and (east/west) but we easily distinguish (up/down) and (north/south) ?	[ "There is a psychological disorder called \"left right discrimination\", which is a very complex neuro-psychological process involving a the use of sensory and visual information, language function, and even memory. There is no corresponding disorder with up/down/north/south, though. The reasons for the latter are ...	[ "How loud a noise is in one ear, relative to the other ear, allows the brain to estimate where the source of the sound is coming from. When both sounds in each ear are in sync and being received at the same volume, your brain figures that the source of this noise must be located between your two ears; the middle (o...
How did popular trends catch on before modern technology?	[ "The high society frequently held gatherings; dances, feasts, games, balls, etcetera. This is where they would share the latest fashions and trends. High society fashion very slowly trickled down to the lower classes, once those fashions and trends became inexpensive enough for the lower class to afford." ]	[ "Hi OP, this is a cultural question, so it would greatly assist anyone considering answering if you could specify which culture you're asking about. For example, the name of a cultural group / country / geographic region, plus a rough time period. Otherwise, this question is simply too broad, as it encompasses almo...
Cost/benefit analysis of daylight savings time?	[ "As a follow up, does anyone have a rational reason why different countries do it at different times? Also, I feel like the answer to this question is very straight forward, but I just can't wrap my head around it: why does the southern hemisphere change in the opposite direction? And why are their seasons not dire...	[ "News and scheduled programs have different airing times for the different time zones. Live programs (sports, or a presidential debate or something) are scheduled so as to attempt to be convenient for everyone. This often ends up being rather late on the east coast, and inconveniently early on the west coast. I don...
Why dont oasis in deserts get filled by nearby sand over time	[ "An Oasis gets its water from underground aquifers. So the water would just push any sand away. Also the presence of plant life around it helps keep the terrain stable, reducing the amount of stuff that'd disrupt things." ]	[ "This is like asking \"why does a fire burn itself out - what's the point of using up all the fuel if it can't sustain itself?\"." ]
why does room temperature water feel so hot when your hands are freezing cold?	[ "The temperature sensors in your skin do not sense absolute temperature, they send relative temperature. When your skin is 7 degrees, 40 degree water feels like 70 degree water, which is scalding." ]	[ "Some theories suggest that in certain situations thinking about something happening to a specific body part causes the relevant brain areas to activate (in this case, the right arm sensory area), sometimes this activation is so much that it actually simulates the feeling you're thinking of, particularly if you hav...
If I'm trapped underwater, and I find a bottle of air, what is the most efficient way to breathe it?	[ "Diver here. The amount of air in an uncompressed bottle won't be enough to make the effort worthwhile. You would be better off taking the time and energy to get to either the surface or a reliable air source like a partner's backup regulator. For short vs long, either one would deplete in a matter of 1 breath any...	[ "Layman here, but I think I can explain this. Take a look at this [illustration of how air flows around a cube in a wind tunnel](_URL_0_). Now, mentally replace that cube with the roof of a building. It's the same effect. Imagine instead of a building on the ground that's on fire, you have a building with no floor ...
Why have SSDs not replaced moving disk storage?	[ "The simplest answer is cost per gigabyte and capacity. Flash storage is much more expensive to produce and the capacity of SSDs are still far behind that of HDD. There is also a disconnect in the cost/gb as when go above a 1TB SSD-the architecture becomes very complicated. Currently, you can get a 1TB SSD for abo...	[ "Cost, at this time, it still requires an extreme amount of money/resources to launch something into orbit or beyond. There isn't anything that we need that badly that would justify mining an asteroid/etc." ]
2001: A Space Odyssey(spoilers)	[ "Dave was actually in that room for a very long time. The Aliens made it look like a hotel room in the same way we make primate habitats look like jungles." ]	[ "Are you watching blu ray? Is it a good transfer? (Example: despite being made in the early 80's Blade Runner Ultimate Director's cut blu-ray is one of the best you can buy) How good is your blu ray player? Is it a ps3? All of these factors contribute to what you determine as a home viewing experience being inferio...
Did FDR and Churchill work with Stalin during WW2 simply out of necessity, or did they not see/know of any evil post-war intentions?	[ "For Churchill, it was a matter of necessity. There's a famous oft-repeated quote (the National Churchill Museum lists it, but with no source) that Churchill allegedly said about the Soviet Union's entry into the war: \"If Hitler invaded hell, I would make at least a favorable reference to the devil in the House of...	[ "Because Nixon saw that China had potential to become a very wealthy trading partner and liberalized relations (and because Nixon was a Republican, it was quite hard for conservatives, also Republicans, to argue he was wrong). Cuban relations remain chilly because Cuban anti-communists represent a very important vo...
Why some stars in the night sky look like they are changing colours or flashing light rapidly?	[ "Small fluctuations in our atmosphere cause the light to refract and can appear as focusing, diffusion, or slight colour changes. Observatories are built as high as possible on mountains to try to reduce the amount of atmosphere they have to look through, and the Hubble gets a very clear view because it is in space...	[ "> 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...
What is the difference between all of the USB types? (USB 3, Type C, Lightning, etc.)	[ "There are two different things being mixed in your question. USB 2 vs USB 3 vs USB 3.1 vs the new USB 3.2 are all standards that define what the signals mean. USB A vs micro-USB vs USB C vs Lightning vs Thunderbolt are \"standards\" (because Lightning and Thunderbolt aren't real standards) that define the mechanic...	[ "High coercivity vs. low coercivity. You're never going to need to re-write the information on the magnetic stripe of your credit card, so its stripe has high coercivity. That means it took a lot of energy to produce, but will take a lot of energy to erase. Hotel keys need to be re-written almost daily, so their st...
Why didn't dinosaurs evolve again after they went extinct?	[ "Dinosaurs evolved from an ancient reptile that no longer exists. Current reptiles might superficially resemble those dino ancestors, but they are very different. The starting point that you're imagining revisiting doesn't exist any more. Could a new family of giants descended from reptiles arise again? Yes. But th...	[ "Look at it like this: They were species closely related to us, similar to goats to sheep, or dogs to wolves or coyotes. Sheep and goats can have viable offspring (that cannot reproduce and so cannot create a viable offshoot) even though they are two distinct species. Dogs, wolves, and coyotes can all interbreed, a...
Why do we get to vote on some things, like gay marriage, but not other things, like SOPA?	[ "Gay marriage in on the state level and states having been having referendums to vote it into law or not. SOPA is on the federal level." ]	[ "Becsuse all tux's basically look the same, just different sizes and are a basic loose fit. Easy for many men to wear the same thing. But theres a bajillion styles of wedding dresses and different styles for different shapes and they're usually fitted. Odds of finding a generic sized dress in a style you like that ...
How a fly/bee/wasp can ignore the infinite space in the world around them and instead find and fly through the small gap in my lounge window	[ "Actually, a million of them did fly into the vast unknown. But you're only noticing this one pesky million-plus-one bug." ]	[ "Because of Newton's First Law of Motion: \"In an inertial reference frame, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force.\" You were moving along with the surface when you jumped or whatever and being in the air doesn't change that." ]
Conan is the most famous fictional Cimmerian. Who is the most famous non-fictional Cimmerian and why?	[ "A clarifying question, if you don't mind. Are you asking about the historical Cimmerians who invaded Asia Minor in the 8th-7th centuries BC? I don't mean to talk down to you, but are you aware that Robert Howard's Cimmerians are a fictional group of people inhabiting a fictional world and not related to the histor...	[ "[The Fordham Internet History Sourcebooks](_URL_1_) are pretty much go-to in terms of finding major/commonly-assigned primary documents in simple text format. The faculty in my department use Fordham docs a ton in assigning readings. I use the [Public Records Office of Northern Ireland](_URL_0_) online selection, ...
Why are Oscar movies almost always dramas?	[ "First of all, you gotta look at who is doing the voting. It's not that these other genres are not as worthy or as capable of being recognised as an achievement in film, it's that you have a bunch of old white cinephiles as your average voter. 91% white, 76% male and with an average age of 62. [Source: LA Times](_U...	[ "\"Just about everyone here\" Where is \"here\" for you? It sounds like your question's premise is based on a small sample set based on personal observation. Before your question is addressed, you should be making sure the premise is valid..." ]
Why do some companies advertise products on TV that cannot be sold to the general public (i.e Boeing, oil companies, rail companies, etc.)?	[ "People still run those companies, and they want the general public to associate their name with quality." ]	[ "Their claim hasn't been verified in any scientific way. If I gave 10000 people a sugar pill and 1000 of them lost weight I could legally claim that the pill helps with weight loss. It wouldn't make the claim true, and the results might not be repeated in a larger sample population. The disclaimer would keep people...
Why are we unable to synthesize certain naturally occuring compounds?	[ "You can't just build complex molecules out of atoms as if you're fitting legos together. Certain configurations of atoms are unstable and are very difficult to create, or break apart immediately after you create them. It's as if you were trying to build a lego house, and you could never have just 1,2, or 3 walls u...	[ "We can, it is just it takes a lot of study and the language isn't in the same form as human language so it isn't just like learning German or Spanish and it comes with body language, scents and other non verbal cues _URL_0_" ]
If the range of the strong nuclear force is 1fm to 2.5fm, why didn't all the particles spread out in the universe and instead find each other and form atoms?	[ "It did. It only took about a second to form protons and neutrons, and less than an hour to form small nuclei, but the universe was still so incredibly dense and hot that the universe was mainly a plasma of free nuclei and electrons for about 380 thousand years, after which those electrons and nuclei could actually...	[ "Imagine the atoms in a magnet as little arrows. When manufacturing magnets, all of the arrows are arranged In one direction. This is done because it makes the arrows useful. ⬅️⬅️ ⬅️⬅️ These arrows don't like to all go in the same, linear direction. This is because they don't like their tips touching, or even gett...
Why can't a CPU just do the work of a GPU?	[ "The short answer is that they can, but a CPU trades raw compute power for greater flexibility, so would be very slow compared to a GPU." ]	[ "Phones are already expensive. Using the absolute best parts available at the time to create some überdevice would cause the price to skyrocket and only a select few people would be able to afford it. It would probably cost the company more money to put something like this together than they could earn by selling i...
I thought the internet was a series of interconnected routers and computers that communicate however they want. How does one institution in one state control this communication even for people in other parts of the world?	[ "The internet is mostly run by companies who own infrastructure (like wires and shit). The institution you're talking about (assuming the FCC) gets to decide what these types of companies are allowed to do. Right now they are FORCED by the FCC to treat all traffic equally. We are worried that the FCC will change th...	[ "[This video explains quite well how it works online, specifically Youtube](_URL_0_) TL;DW: Youtube only sends information about changes between frames of a video. Since there is usually very little difference between 2 frames the server can just say \"ehhh take what you had last time, shift this part a tiny bit th...
Why do we have tax brackets? Why don't we have a flat rate for everyone, say, 30%?	[ "Someone making the federal minimum wage of $7.25 would make about $14.5k, and pay $4350 in income tax, leaving not very much to live on. So to make it fair, we tax lower income at a lower rate, because they don't have much to begin with." ]	[ "From the guy who got the act passed in the first place: > In an NPR interview, Bradley said his motivation was simple, and personal. \"Betting on sports was betting on human beings, and I thought that was wrong,\" he explained. \"It turns players into roulette chips. It makes the game, which is a game of high-lev...
It takes 11 minutes of hypoxia for the brain to die, but yet you can kill a man by strangling him much less. How come?	[ "Strangling someone where pressure is put on the blood vessels in the neck can cause feedback to the heart which can cause it to go into cardiac arrest (gentle massage to the carotid is used to slow down rapid heartbeats). If done properly that can be done in only seconds. The person still takes a while to die but ...	[ "The super-sonic aircraft is an example of (nearly) [rigid-body motion](_URL_0_). Note that this page says: > Even though such an [prefectly rigid] object cannot physically exist due to relativity, objects can normally be assumed to be perfectly rigid if they are not moving near the speed of light. Which maybe beh...
Why does poor circulation cause swelling/edema?	[ "Blood fluid (plasma, not cells) is always leaving blood vessels and seeping into tissue because of blood pressure. If the fluid pressure in the tissues is reasonably close to the static blood pressure in the veins or the venous ends of the capillary beds, most of this fluid flows back into the veins and into circu...	[ "How do you know you don’t have exercise induced asthma?" ]
What's that "floating" feeling I sometimes get when sitting or lying down?	[ "Sometimes the floating feeling is the fluids in your ear sloshing in just the right way and you sort of think you're falling. The feeling could also be a sort of sensory deprivation where you don't feel anything new touch your body except from the sheets." ]	[ "It's called [mind-wandering](_URL_0_). It's long been thought that the [default mode network](_URL_1_) is what drives this. This network refers to a number of regions in the brain which show greater activity when people are not engaged in any active task (or are engaged in an easier relative to harder task). The i...
Why do shows use the BEEP noise to cover expletives rather than just mute it?	[ "So people know it was supposed to be a swear, and not something they didn't hear, or a problem with the audio." ]	[ "Stations charge by the second to run a commercial. Shaving down to the most recognizable parts after the long version has run saves money." ]
How did women deal with periods before tampons/pads were invented?	[ "There's always more to be said, but our illustrious /u/sunagainstgold has a good post here that may be of interest to you: [How did women deal with periods in medieval times?](_URL_0_)" ]	[ "If you're new to the thread, please don't post the Mythbusters episode again. Mythbusters is entertaining but it's not history (or more specifically, it's not historical proof of anything.) The short answer is no, not that we know of. /u/davidaop, our pirate expert, and I have both answered [questions about th...
Why did Spain, a nation notorious for its conquests across the globe never capture Portugal?	[ "I answered a similar question last month, although much depth could be added; _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...
Is the golden ratio the same as the fibonacci sequence?	[ "No, because a ratio and a sequence are two different things. The two are connected because if you take a term of the Fibonacci sequence and divide it by the previous term, the result will be approximately the golden ratio. It gets closer and closer as you get further in the sequence. This isn't unique to the Fibon...	[ "The point of a Fermi estimation isn't to get the right answer to a problem - it is to get in the _ballpark_ of the right answer so you can get a sense of scale. You make estimations and general guesses about what the inputs are - the goal is to be in the general order of magnitude of the answer. For example, lets ...
Why does every human civilization discovered have some of the same core practices as each other? ie: Bread, Writing, Marriage, Religion, etc	[ "Bread is far from universal. Ever been to Asia? Bread can be incredibly hard to come by outside of tourist areas even today." ]	[ "At one point it in time guns were all handmade one-offs, and caliber was \"how big can we make it before the low quality steel barrel splits like a banana peel\". I remember reading how part of Napolean's success was standardizing on a small number of designs. That simplified his logistics, while the Prussians wer...
How do snowflakes get their perfectly unique hexagonal forms?	[ "Has to do with the angles formed by the hydrogen with the oxygen. They clump together based on water being polar. This clumping forms larger patterns associated with these angles. These grow until it forms we think of as snowflakes. Varous enviromental factors impact how these crystals grow into snowflakes. [_URL_...	[ "Are you asking about the honeycomb, the thing with the honey in it made from beeswax? That's bee fat that the workers extrude and use as a building material." ]
Why do so many novice shooters lean back before pulling the trigger? Isn't more natural to lean into your shot?	[ "Lean happens because the natural response to holding a heavy object in front is to lean back so center of gravity is centered above your hips. To be steady without leaning requires active use of core muscles." ]	[ "I thought speaking in tongues was a language that was directly spoken between you and \"God\". Growing up in Church and see this, I assume now it was nothing more than overwhelming emotions from people and whatnot. The sort of feeling you get in a big crowd, go with the flow sort of deal. Everytime the pastor did...
Tumblr. What is it? How does it work? Why is it so popular?	[ "Tumblr is a blogging platform. It's typically best for short-form post. Think of it as an in between Twitter and a traditional blog. Tumblr essentially allows you to post text, photos, videos, etc. It also makes it very easy to share content between blogs. For instance if you like a particular photo you can \"reb...	[ "This CGP Grey video does a really good job of explaining it all. _URL_3_" ]
Can you actually be injured by thinking too hard?	[ "Well, in a way maybe it can: _URL_1_ - but those are cases in which the brain is damaged during chronic neurodegenerative diseases. There's no such thing as thinking to hard in healthy people. Thinking does simply not damage the brain. Actually thinking is the best way to train our brain, lacking in brain stimul...	[ "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...
if I can shine a light through my fingers/hand, why can't I see the shadows of my bones/veins?	[ "The light is diffused so much by your skin and flesh, that it's impossible to make out a coherent object. Think of it as looking through a pane of frosted glass, times a thousand." ]	[ "That is what the body does. Fat exists so it can feed you during periods of deprivation. The reason that you can't just starve yourself thin is because there are other nutrients in food that you kinda need to consume. Vitamins and Minerals. If you blatantly starve yourself, you will get thin. Unhealthy as fuck i...
What are “Natural Flavors” on US Nutrition Facts / ingredient labels and why aren’t they more specific?	[ "From the FDA: > The term natural flavor or natural flavoring means the essential oil, oleoresin, essence or extractive, protein hydrolysate, distillate, or any product of roasting, heating or enzymolysis, which contains the flavoring constituents derived from a spice, fruit or fruit juice, vegetable or vegetable ...	[ "U.S. sales taxes are VERY Complicated. We don't have a national sales tax that applies evenly across the board. Sales tax goes down to the state, county, and even local levels. The tax you pay in one store could be completely different to the tax you pay in the store across the street in extreme circumstances. Plu...
Symmetry - How important is it for life and the universe?	[ "Each of the fundamental forces in nature derives from an underlying symmetry that is manifest in the equations of motion. So from that point of view, symmetry is very important." ]	[ "We constructed the [Arecibo Message](_URL_0_ ) to communicate with aliens. We used a lot of math, like making it 1,679 bits long because it is a semiprime (the product of two prime numbers). It can be arranged rectangularly as 73 rows by 23, to make picture, the 23 by 73 version is gibberish. Math = > Pictures = >...
Why is there much talk about building human colonies in space (i.e. Moon, Mars), but no talk about building in earth's oceans, which is seemingly easier?	[ "Building colonies in space or on other bodies in space would actually be easier in a lot of ways than building in the ocean. Pressure is the big one here; past a certain point and we just don't have the materials or science to manage it. Fewer people have visited the bottom of the Challenger Deep than have walked ...	[ "Unfortunately, Liquid water, needed for even the most extreme plants, is extremely rare to completely non-existent. Liquid water will not last long on the surface due to the almost complete lack of atmosphere. In addition, with such a limited atmosphere, plants would not be able to survive/function properly and wo...
Why do author's bios at the back of books tell you where they live?	[ "Marketing. It makes the reader more easily relate to them. They aren't really a group of editors and publicitsts pushing the book, it's just that one person in a small town that wrote a story." ]	[ "California has really strict laws. The exact wording is just to comply with a particular labeling law required by the state. And since it makes sense to give the same products to California that you give to the rest of the US, it's common for many products to have the warning printed on the label. Realistically, t...
In music, does minor tonality always have a "sad" quality, even in different cultures not raised as such?	[ "Not all cultures see minor scales/progressions as sad. Spanish folk music is the common example. There is a paper from 2010 suggesting many languages use the minor 3rd inflection to denote sadness in speech, and it could carry over to music. [The minor third communicates sadness in speech, mirroring its use in mus...	[ "The temperature of food and drinks affects how we taste things. The warmer something is the more you can taste sweet and bitter. The colder it is the more you taste salt and sour. The trance minerals in water give it a bitter taste, so the colder the water the less bitter it tastes." ]
Why do people think that free birth control is taking away religious freedom?	[ "You are entitled to your (religious) opinions. If you think birth control is wrong, nobody can force you to support it especially financially. Free birth control actually means it is paid for by the State, i.e. by the taxes, i.e. by you. You are forced to pay for something you do not support and that is again your...	[ "What lost income? If anything, they may see increased income. Having easy to access coupons can encourage buyers to buy more, or buy stuff they weren't planning to originally buy. It also attracts buyers who weren't going to buy anything. New sales can make up for the discount provided by the coupon. Not to mentio...
What would happen if the ice caps completely melted?	[ "Complete melting of the ice on Greenland would raise sea level by 6 metres (20 feet). Complete melting of Antarctic ice would raise sea level by 60 metres (200 feet). The melting of floating sea ice will not contribute to sea level rise, however thermal expansion of the water will raise sea level by at least sever...	[ "If you have Netflix there's a very good documentary titled \"the world without US\" It explains your exact question." ]
How do mental disabilities/disorders improve one's senses?	[ "There is none, at least not that we know of. You're assuming Hollywood Autism is actual Autism. It really, really isn't." ]	[ "Genetically speaking it exists because it poses a survival advantage. Sometimes the guys who go out hunting get killed by the tiger, and the ones who gather nuts and berries near the cave live to pass on their genes. Also some studies show that depresses persons have a more accurate appraisal of the world. So in...
Why does facial tissue (Kleenex for those in US) cost so much more than toilet paper?	[ "Other than packaging, many tissues are softer than toilet paper, and have some lubricant in the paper so it won't dry out your nose." ]	[ "People with the coal and oil want to keep making money from the coal and oil. They go to Congress and say how it is necessary for our economy and if we don't keep supporting it, thousands will lose jobs, whether or not it is true. Also, most of our infrastructure is already set up for fossil fuel use, the power pl...
ELIA5: What is bluetooth?	[ "Bluetooth is a type of technology that transfers information wirelessly between electronic devices (usually computers or mobile phones). It can be used to send a file from one computer to another computer on the other side of the room without having to connect them with a cord, for example. The way it works is lik...	[ "This is a very good question, but I don't know if can be aquatically explained to a 5 year old. Still, I would love to see someone do it." ]
What is Front End and Back End Web Development?	[ "Front end - stuff the end user sees. When you go on eBay and use the search bar to find the thing you want, that's front end. Back end - how it all works. When you type something into the search bar it sends information to a server that pulls the information you need, that's all back end. When you buy a thing on ...	[ "It's the first and last letters in Latin \"numero\". _URL_1_ _URL_0_" ]

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