Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
Why is the perception of pitch and loudness logarithmic rather than linear ?	[ "A log scale gives you a more nuanced and differentiated perception of weak sounds, compared to linear. A linear scale would \"compress\" weak sounds into a much more narrow perceptual range, compared to log. It is probably advantageous for all creatures to have a more rich understanding of faint sounds, at the lim...	[ "I'll have a crack at explaining this at ELI5 level. You know about powers of ten? Going from 10, to 100, to 1,000? Those represent three powers of ten. You could say that 1,000 could be written as 10^3. You could also say, \"Hey, I'm going to say this number and it means not juust the number, but the power of ten...
Why can we never remember falling asleep, or the exact moment we fall asleep?	[ "Well for one reason, long-term memory doesn't record in real time. Your brain has something of a buffer for short-term memory to use in the moment, then screens what information is necessary for long term retention. I'm guessing that there is little reason for your brain to record whatever was in your short-term m...	[ "There are a few factors at work here : Moſt chairs are deſigned to ſit at about knee height ; they generally ſupport your back, and more importantly, your butt and legs. Toilets are uſually lower, and they are made with a large hole in the middle, into which you ſink a little. This lower height, lack of ſupport,...
Would I be able to get nutrients from grass if I took a cellulase supplement?	[ "Cellulose is polymerized beta-glucose. Starch is polymerized alpha glucose. If you could get some enzyme to function in the stomach and break down the cellulose, I'd imagine that it would be more or less just as nutritive as starch/glucose." ]	[ "As stated already, you always need reception, there's no way around that. To explain the lack of SIM, you need only look at the meaning of the abbreviation: Subscriber Identity Module. A SIM is not actually required to make a phone call, it's just required to identify you and associate your phone with ...
Does a plane going faster than the speed of sound have less resistance than a plane that is going slower than mach 1?	[ "no, there is high resistance at supersonic speeds. This is because of the \"no slip condition\". The no slip condition states that, very close to the surface of the plane, air is moving at the same speed as the plane - it can't slide along the surface. So, there has to be a transition between supersonic air and su...	[ "The ice disturbs (contaminates) the air flow. Wings require smooth air flow over the wings to produce lift. Ice disrupts that air flow, which reduces lift. Ice also changes the shape of the wing, which is engineered to be a shape that produces maximum lift. If that shape is changed, it won't produce as much lift."...
What prompted the change of the official language in the Byzantine Empire from Latin to Greek?	[ "Greek was always lingua franca in the east, before Romans even conquered the region. Romans already translated all official documents to Greek in the east before the split. And the transition from Latin to Greek as \"official\" language of the Byzantines was not a singular event, but a centuries long process. By t...	[ "I can't add a lot, and I definitely don't wanna play the guessing game. I'm Syrian, I can read most of the script, it's in Diwani, an arabic style that I can read and write, but since the document is in Turkish I can't understand most of it. Here's what I got from the document: * the document is signed late Muharr...
Why doesn't my car insurance go down the longer I own my car?	[ "you still have the same chance of hitting an expensive car as you did six years ago." ]	[ "Supply and demand. People are willing to pay more to shave a few hours off of their trip and there's only so many seats on the plane. Airlines aren't priced by how much it costs them to fly; they charge you (or try to charge you) the maximum you're willing to pay." ]
Pawning, what is it?	[ "Pawning is getting a loan but instead of you getting a loan based on your credit or income you get a loan based on an item. For instance, say you need $5,000 for whatever reason. You would take your car of something worth much more the $5,000 to a pawn shop. They will take your car and give the loan to you. You th...	[ "It's how poor students would pay teachers many years ago. Before schools were publicly funded, families had to pay for their kids to attend school. This resulted more in a barter system where kids of farmers would pay with apples or frequently potatoes." ]
How do banks profit from cash-back reward programs on credit cards?	[ "Whenever you use your credit card somewhere, the merchant pays a fee plus a percentage of the sale to te credit card processor." ]	[ "So, just to be clear, based on what you describe in your post I am pretty sure you committed [mail fraud.](_URL_0_) Not a judgment, just a note that your nearly free CD's may have come with a sizable risk of imprisonment and large fines. Second, Columbia House made its money because you only got the first record ...
Alphabet, Phoenician or Minoan?	[ "Minoan Linear A as a script is a precursor to Mycenaean Linear B the script. This script pretty much died out at the end of the Bronze Age. Mycenaean Greek as a language is one early dialect of the Greek language. The Phoenician script is a precursor to the classical (and modern) Greek script (as well ...	[ "Custom and practice. If you build it and it falls down, you do it again differently. When it works, you keep it like that. That, and people weren't stupid or uneducated - the Greeks were fairly capable mathematicians, as were the Egyptians" ]
if we found a habitable planet many light years away, would we currently have the resources to get there?	[ "No. The first problem would be finding our orbit around the galaxy, then find the orbit of that planet around the galaxy. There will be an optimal timeframe to launch for that planet, but in all likelihood that timeframe is several million years from now. So if we launched now, we would have to sling ourselves int...	[ "It takes a ton of energy, and the cost is prohibitive. [Here is a good explanation why](_URL_0_) Here are some other discussions on this topic. _URL_2_ _URL_1_ _URL_3_ _URL_4_" ]
How do we program software code with languages we speak?	[ "Keywords are just tokens that the compiler/interpreter picks up on, the fact they're English words is irrelevant. When the compiler/interpreter sees the sequence 'if' it understand it's to make a certain binary structure that will either execute the first bit of code or execute the second bit of code depending on ...	[ "Okay. So let's say that you want to bake a cookie just like the ones that grandma makes. You could try to eat her cookie, and then using your knowledge of baking sort of reverse engineer it, but it would be an incredible hassle and very hard to do. But if you had the recipe she used, it would be very easy to figur...
What happens to the economy when you throw away money?	[ "It's deflationary. Burning twenty dollars creates a deflationary effect, and it adds a bit of value to everyone else's dollars." ]	[ "It varies, but not much individually. The problem is when everyone does it. It's kind of like why you're taught not to pick a flower from a garden when growing up. You alone, picking one flower, is not going to be noticed, it's not going to affect the plant or garden overall, but if everyone picks just 1, very s...
(Magnetic Resonance) How does a nucleus in a superposition of states interact with a photon?	[ "> Applying an RF pulse can excite nuclei from one state to the other. The RF pulse actually doesn't do that. Rather, it acts on the net magnetization vector that arises from the population difference. From what you wrote it seems you've already seen the [vector model of NMR (PDF)](_URL_1_). This actually answers y...	[ "The key thing here is [Noether's theorem](_URL_0_), one of the most beautiful results in all of physics. Noether's theorem connects symmetries of nature to conserved quantities. For example, when physics is independent of spatial position, momentum is conserved. Or when physics is unchanged by rotating your view, ...
That skin that peels off next to your fingers nail?	[ "Right below my nail, there is skin that will peel, it's no the cuticle but the skin below that, I have no idea why but I've always had it." ]	[ "Talking completely out of my ass here, maybe it has to do with some instinctive grooming drive that we inherited from our ancestors. If you go to the zoo or watch a documentary, you can see that apes/etc. instinctively groom each other; so some people probably get a sense of pleasure from seeing such things becaus...
Will a suction cup work in space?	[ "Suction cups work by creating a vacuum inside a chamber, and outside air pressure pushing down on the object. Space is a vacuum. It does not have outside air pressure Thus... no. It would not work. _URL_1_ _URL_0_" ]	[ "A lot of experiments to see what happens when there is little to no gravity going on. How it affects human body, how it affects, plants, animals, bacteria, equipement ect. It's also much easier to set up experiments that require very cold temperatures or very low pressures. [Here's a list.](_URL_0_)" ]
How do we get so much information from gravitational waves?	[ "That's not how it works. The detectors don't care where the wave comes from. They are on all the time. Whenever a wave hits, there are two main pieces of information we can get from it: * From the details of the waveform we can know what happened: all the waves detected so far are exactly the kind of wave two big ...	[ "You can use pulsars to do something like that, although that would only work within a single galaxy. In fact, the Voyager probe has a map to Earth using pulsars for triangulation." ]
Why are Youtube recommendations so awful?	[ "1- SO clicks on a Dr. Phill Episode on my YT account 2 - Dr. Phill all over my devices for the end of eternity, won't matter the fact I am watching (death metal festivals, Shark Tank,etc) I will always see that stupid Dr. Phill face in thumbnails." ]	[ "Turn off the motion smoothing function. It drives me nuts too. _URL_0_" ]
the American ROTC program.	[ "ROTC = Reserve officer training corps. Military pays for your college, but you receive military training while in college, and have to serve in the military for a number of years." ]	[ "If I can ask a follow-up, why is Waterloo referred to as a \"lamentable event\" when this article was presumably written from an Anglo (at least, Anglo-American) perspective?" ]
If the universe is mostly hydrogen, how come the Earth is iron, silicon etc?	[ "All of the heavier elements were fused together from lighter elements inside dying stars. Those stars exploded, and that material eventually became us. We are star-stuff, as Carl Sagan liked to say." ]	[ "A long time ago in places like Greece, Rome and even before that in really, really long ago places like Sumeria, and Egypt people made up stories about the stars/planets and the pictures they thought groups of stars made. These stories were usually about beings they considered to be gods or demigods (the word demi...
What happens neurologically that causes a song to become "stuck" in our heads?	[ "I cannot give you a straight answer, [but this book might interest you.](_URL_0_)" ]	[ "This isn't perfectly understood on a cellular level yet. But, the basic idea is that as you learn and study your brain makes new connections between brain cells. The things you know are stored as connections between neurons. The more often you use these connections the more they get reinforced and the more permane...
Why do actors often have very dilated pupils while filming?	[ "They're not looking into light, they're looking into a relatively dark area, while being lit. You can actually see that in the picture you posted." ]	[ "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...
How did Islam spread so fast from the Arabian peninsula after the death of Muhammad?	[ "I've written quite a bit about this topic elsewhere, which I hope provides quite a comprehensive view of this period as a whole. The most relevant is my answer on [why the Arab conquests succeeded](_URL_4_), but other answers on [how Christians at the time saw Islam](_URL_1_), on [whether Islam was seen as a Chris...	[ "[William Chrystal](_URL_0_) has made it his late-in-life calling to advance the case of Alexander Hamilton. He maintains that we know so little of Hamilton's legacy as a founding father because he died early and Jefferson and his followers had control of shaping the perception of that early period (and Hamilton, w...
Which mediterranean tribe/culture besides the Carthagenians were difficult for the Romans to defeat in battle?	[ "Viriathus, the leader of the Lusithanians, was notorious for his guerilla war with the Romans. His resistance was so effective, Rome had to simply bribe two of his men to kill him in his sleep. The best source for this confrontation is Appian, I think. _URL_0_" ]	[ "No. And to discuss why involves discussion of burden of proof. \"Extraordinary claims require extraordinary evidence.\" Sailing across either the Atlantic and Pacific, and making contact is a pretty extraordinary claim. Books such as \"Peru Before the Incas\", and \" The Last of the Incas\" have nothing to say abo...
Did we learn anything from inhumane experiments (such as those performed by the Nazis) that we otherwise could not have?	[ "_URL_0_ Yep. In addition to the hypothermia experiments I'm finding less sturdy reference to experiments involving vacuum exposure. I'm not finding any evidence that the data from that has been used for anything but I wouldn't expect that to be as easy to find." ]	[ "* \"Will to power\" : the driving force for all human life, expressed through ambitions and achievements * \"Übermensch\" : a philosophical goal for human life, to become the best in this world as opposed to others--i.e., an afterlife--and to become a source for new values based not in the past but a present love ...
Is it theoretically possible to measure the superposition of a particle without disturbing it?	[ "In short no, one key property of quantum measurements is that they must be disturbing, and so any superposition will \"collapse\" into one of the possible outcomes once you measure the particle. > In other words, can you determine the probabilities without detecting the result? Superposition is dependent on the b...	[ "Depends on the material and temperature. Sometimes the surface forms a reconstruction, as dreykevins explains. Other times the surface forms an oxide or some other surface layer, which can prevent recombination. Other times the pieces actually CAN be put back together, and this process is called \"cold welding\". ...
Does bleach added to soil eventually break down into harmless substances?	[ "[After use in household cleaning or laundry, sodium hypochlorite breaks down into 95–98% salt and water. The remaining 3–5% is easily handled/removed by either sewage treatment or a septic tank where it degrades like starting soil. Further, no liquid bleach enters the environment as it reacts with organic loads in...	[ "Sort of how hawaiis volcano is not particularly dangerous as it constantly and very gradually errupts. Good question, i would love a geologist to point out all the unidentified variables etc" ]
What were some English first names that were once popular but has not been popular within the last century or two?	[ "If you are looking for names that were popular in the United States, the Social Security Administration tracks them by decade starting with the 1880s on their website. Here is a link: _URL_0_" ]	[ "Sorry, we don't allow [\"trivia seeking\" questions](_URL_0_). These tend to produce threads which are collections of disjointed, partial responses, and not the in-depth discussions about a particular topic we're looking for. If you have a specific question about an historical event, period, or person, please feel...
A question about Diabetes 1	[ "> any sugar in their blood stays there. But why isn't that good? Because if sugar is staying in the blood, it's not getting where it needs to be. Insulin is what lets your cells absorb glucose from the bloodstream and consume it for energy. If you've got no insulin, then no matter how much sugar is floating aroun...	[ "Because people in a hurry, like when shopping, tend to prioritise the first number in a list of them, and subconsciously consider it to cost less" ]
How are people making money by posting youtube videos?	[ "Advertising. Those who qualify can become YouTube partners and receive a cut of the ad revenue their videos generate for YouTube." ]	[ "There's also something about you're only allowed to have five seconds with sound at a time. Notice how much of Cinema Sins is them talking, then brief sound, then talking. Also, when you review a movie, it's considered \"Fair Use\", that means that you're not infringing on any copyright, because you're talking abo...
Does earth's center of gravity shift as the topography changes (mountains, tides)? Does the core move?	[ "The Earth's mass distribution is constantly changing at an infinitesimal rate, but gross and sudden changes occasionally occur as a result of particularly massive earthquakes. For example, the mass shift which caused the Dec 26, 2004 megathrust earthquake beneath the Indian Ocean is believed to have: * sped up th...	[ "We actually do have to account for this, in a way -- GPS satellites go so fast (they orbit far above the earth, and go fast enough to stay above the same spot on the ground) they dilate time just enough to throw their locations out of whack, so we have to manually adjust their clocks in relation to a central clock...
What effect would transplanting a group of penguins to around the north pole have?	[ "AFAIK they would be poorly prepared and be decimated by polar bears" ]	[ "You know when iTunes, Facebook or your phone updates and how you know it's the same program as before but things have changed slightly and you are kind of lost. Well that's what it would be like going from animals to humans with the errors being death instead of frustration." ]
What problem do people (parents) have with vaccines? Is it mainly a phenomenon in the US? Why?	[ "Others have covered the biggest reason thoroughly (Scumbag Wakefield), but I've heard another minor one: vaccines 'are full of chemicals'. Aaaaargh. I'd rather be full of chemicals - which, as a thing that exists, I already am - than full of polio." ]	[ "Horse meat isn't rare at all. You can get it in many parts of europe. Tastes ok too. Anyway, that's culture. The same reason we think that bacon and eggs is a breakfast food, and don't eat grasshoppers." ]
How come there are no videos showing the plane hitting the pentagon?	[ "...[here](_URL_0_) is the securtiy video. What else are you looking for?" ]	[ "A few reasons: - It was a [Falcon](_URL_0_), which is a pretty good sized rocket. - The launch was at sunset. So it wasn't daylight on the ground, but the rocket itself was in daylight. The sunlight reflected off the exhaust plume. - It was a south launch into polar orbit. The track of the launch went near the pop...
How do muscles actually grow? I heard that damaging your muscle is actually.. good?	[ "You damage muscle so that when you body repairs itself it rebuilds itself a little stronger than it was before (you feel this as muscle soreness after working out). You repeat this process and that is the basic premise behind strength training." ]	[ "Multiple requests from the same type of place (several car dealerships, several mortgage brokers, etc.) within a short time are combined to count as one inquiry, so go ahead and shop around. Part of your credit score is how much debt you have. If you are trying to take out a lot of new debt, then you will probably...
the difference between an empire, a kingdom, and a country and how an area would aquire one of those titles.	[ "A country is any sovereign political entity. Typical factors for being a country are being independent of foreign nations, having a standing army, and having a government, but the Vatican, Taiwan, Hong Kong, and Somalia all push the boundaries of that definition. A kingdom is a country ruled by a king. The name d...	[ "Ask Reddit is for personal opinions, stories, and the like. Essentially subjective answers to questions without hard answers. Something like \"whats your favorite food\" is a good post there ELI5 is for getting a simplified answer or explanation to a question that you don't understand. A good thread here would som...
What is occurring biologically when a person gets tasered?	[ "electricity plays a role in nerves transmitting messages, which control muscles, so there you go" ]	[ "You essentially create a battery in your mouth, the pain you feel is a small electric current. _URL_0_" ]
Where do the machines that manufacture the machines that manufacture actual consumer items come from?	[ "Most machines and tools can be made by a person using a simpler machine or tool, which was made by a person using an even simpler one, and so on. Until you reach the point where the first tool is somebody's bare hands bashing rocks together. Now they might not actually have been made that way. Nowadays most simp...	[ "In the 60s and 70s, Regan reduced the taxation of capital gains over 1 mil from 70% to 30%, loosing a good portion of tax revenue, reducing education subsidies and creating a poorly educated and unskilled workforce. Entering the age of globalization and technology starting in the 1980 through the present, a new gr...
Should western states like California, Oregon, and Washington be concerned about being hit by hurricanes?	[ "No. It is extremely unlikely a typhoon would hit the US west coast. Large storms do occasionally hit the southernmost tip of Baja, but not as strong or comparable to the hurricanes in the Atlantic or Gulf of Mexico." ]	[ "Some of my uni professors in the dendrochronology lab (tree rings) at the U of Arkansas did research on this by studying the climate of the area all the way back to about 1100. The research revealed that the 3 year period surrounding the colony was the driest, most extreme period of drought in the 800 years studie...
When a plane flies long distances, does the pilot have to account for the curvature of the earth to maintain a specific altitude?	[ "For altitude? Nope. They are not flying a ballistic or something, they take constant altitude readings and adjust to the current position. The amount of down is insignificant compared to variation in wind and such. For long flights they certainly navigate the globe rather than by treating it like a flat map. And s...	[ "If you lived a few thousand years ago, you could make a good map of the constellations of the zodiac piece-by-piece at night. Then, at sunrise or sunset, you could measure the angle between the sun and celestial objects that are visible even in daylight: the Moon, Venus, and Jupiter are the best choices. You then ...
If America were to do away with the penny, what would happen to all the pennies I have?	[ "They're legal tender, so the government has to honor their value -- at least until they decide they don't anymore. People would box up their pennies, and take them to banks and get other currency for them. The banks would then send the pennies to the Treasury, who would dispose of them. You could keep them, but af...	[ "Initially, they don't go anywhere. Your computer keeps a list of all of the files on the hard drive and where on the disk they are located. When you delete something all it does it remove its entry from the master list. The data of the file is still out on your hard drive but it's now marked as free space. When yo...
What makes it that liquid "adheres down the side of a glass" sometimes?	[ "Surface tension. Basically, the water molecules want to stay together due to intermolecular forces that attract them to each other. Due to the shape of the glass and based off of the speed at which you pour the glass, the water molecules will want to roll down the side of the cup instead of dropping straight to th...	[ "Gravity Gravity pulls the water up a little bit. More than it can pull the land (which is attached to other land and on average all further away) Note that the land does get pulled too - which is why you get a tide opposite the moon - thats the land being pulled away from the water!" ]
Is there a difference between monitor headphones and just listening to music headphones?	[ "Monitor headphones mean that they aim for a flat EQ, they don't favor any frequencies (low's, mid's, high's). Almost all expensive headphones (besides Beats and Boss) are monitors, and many/most are open back (zero noise isolation). I bought the [Sennheiser HD 598](_URL_0_) for $100 on Black Friday last year, an...	[ "The diffrence is how musicians and actors get their income. An actor has a contract. \"Act this for us and we give you $100\". He does his work, gets paid and wether or not the show or movie is succesful he walks away with his cash. Musicians work on commision \"Make a song for us. For ever 10.000 copies sold you ...
In US history the Confederate States are often seen as the bad guys. What's the truth?	[ "The scholarly view is that the majority of white people on both sides were racist, that neither side was silly, and that the Confederates were led by white southerners whose primary objective was to protect and expand slavery." ]	[ "A follow up & relevant question, how close did the CSA come to being recognized by a European Power?" ]
Can you just keep recycling hydroponics water rather than adding more water to the system?	[ "You could, but you would have to take some things into account, most of which could be solved reasonably easily: 1) as plants do their thing, they lose water from their leaves and transfer it to the air (called transpiration). This would reduce the amounts of water in the hydroponic reservoir. As plant on Mars wou...	[ "Many plants that you grow in your garden may require a wetter climate than where you live. Additionally, when you're trying to grow plants for food or aesthetics you want to give them the most favorable conditions possible so they look the best they can or yield the best food." ]
What's the difference between paella and risotto?	[ "Both are very different. Paella is a spanish dish. You cook it in a large pan (also called a paella). Primary spice needed in it is saffaron. You can then flavor it with a variety of meats (chicken, sausage, seafood are common). This large pan creates a lot of surface area that produces a crunchy bottom on the ric...	[ "Here's a pretty good explainer. _URL_0_ Basically it comes down to different memory, different promises (reliability and service life), and different marketing." ]
To what extent did the Axis power coordinate their actions/strategy in WWII?	[ "There was little to no military cooperation between Berlin and Tokyo, but some cooperation between Berlin and Rome, as well as the other German allies. However, Hitler did declare war on the US in 1941 following Pearl Harbor, and not the reverse. The Hungarian, Romanian, Finnish and Italian armies participated qui...	[ "The person you link to has borrowed (~~or plagiarised - there's no citation~~ Edit: /u/Iguana_on_a_stick points out they do reference Eckstein on page 3, I only Ctrl-F'd the first page. My bad.) their main argument almost entirely from Arthur Eckstein's Mediterranean Anarchy, Interstate War, and the Rise of Rome...
Has paternal alcohol intake been linked to fetal alcohol syndrome, and what research exists on the subject?	[ "This has nothing to do with FAS which will have different causes (action of alcohol and metabolites on the development of the fetus) and consequences than what this paper talks about which is changes in DNA methylation. There may or may not be any biologically significant consequences, but they probably won't be F...	[ "Could you point us to the source from which you drew your question? When you say feudal Russia what years are you thinking of? I have not heard this before personally and would be curious to see what it has to say." ]
Why are manned lunar landings not a regular part of ongoing space missions from various space agencies like NASA and the ESA?	[ "After Apollo, interest in manned lunar landings greatly diminished. Interest and money turned toward the shuttle program and space stations. Right now, no one has the capability to land on the moon as both the shuttle and Soyuz were not designed to leave Earth's orbit at all. NASA does plan to return to the moon w...	[ "A local coop game requires more processing power to render the game from multiple viewpoints. As the last generation of consoles dragged on longer and longer, developers were having problems making the game continue to make the game look better and better while also leaving enough ram and processing power for the ...
How is iron from RBCs transported back to the bone marrow after being broken down?	[ "We have a protein called [transferrin](_URL_0_) that binds free iron ions and facilitates their transport back to tissues that need it." ]	[ "There will be a router on the bus that has a mobile data connection instead of a cable/dsl connection. Just like how you can use most phones as a mobile hotspot." ]
Could there be a galaxy closer in distance than Andromeda to the Milky Way that is similar in size and shape to both but we can't see because the core of the Milky Way is blocking our view?	[ "Nope! We can see through the Milky Way well enough in various wavelengths to see what else is out there. Far infrared radiation, for example, can pass through obscuring dust in our galaxy to help us see outwards. There are [a bunch of dwarf galaxies orbiting the Milky Way that you may be interested in](_URL_0_), t...	[ "Nice idea, but it won't work. There are a few reasons: (1) We know dark matter does not feel the electromagnetic force. If the dark matter were Dyson spheres, from absorbing the energy of the stars they surround, they would radiate in the infrared, and so we'd detect this. In fact, people have looked, and [no Dyso...
How do cellar spiders (Pholcidae) decide to abandon webs, and how long does it take for them to decide a web location is bad?	[ "So, I had to do a pretty deep dive for this, even as an entomologist. The answer then, unsurprisingly is quite convoluted. It seems to depend a lot on the sex and age of the pholcid in question, with males being the most apt to abandon webs in search of mates. That being said, that messy tumbleweb isn't the primar...	[ "It's just an obsolete tradition now, that few care about. It started back when summer clothes and winter or formal city clothes were different, often made out of different materials. Such as cotton vs wool. And often the families of the gentry class would relocate from their winter home in the city to their summer...
If you can legally represent yourself in court, why can't you hire an unlicensed attorney?	[ "You can represent yourself because it's your right. But having untrained people advising folks on legal matters is just a really bad idea, and it hurts the cause of justice. You could also give yourself stitches, but we don't allow some dude off the street to give you medical care without training and licensure." ...	[ "Employers pay half of the social security and medicare taxes (the thing listed as FISA on your paystub.) When you are self employed, you pay the half that your employer would pay if you had an employer." ]
What is the fast-track trade bill that was just passed and why is it bad?	[ "We don't know if it is bad or not, because we're not allowed to read it. That alone is substantial reason for alarm because the government doesn't do good things under cover of secrecy. Now, sometimes secrecy is the lesser of two evils: I'd rather allow the government a little secrecy than allow potentially hostil...	[ "\"America\" can't, but Texans in his district certainly can. Once every two years they get the opportunity Mr. Smith is a congressman, and he represents one particular place. Only people from that place get to vote for or against him. Unfortunately Mr. Smith represents a wealthy area near Austin, Texas where I sus...
how old is the notion of the political party?	[ "UK perspective here. It's important to note that the ideal of personal independence - moral, financial and political - was paramount as parties took shape in the late 18th and early 19thC. To be dependent on some kind of party line was seen almost as disreputable. You're into the 1830s and 40s before parties mean ...	[ "Becaus for most if them their frontal lobes aren’t developed yet and are very easily molded by repetition and hype. Adults have the ability and experience to see the BS in ads." ]
When using sunscreen, can our body produce Vitamin D?	[ "To the extent it blocks the sun's rays from interacting with your skin, no. Here's a very recent article about Vitamin D and sunscreen. It's for a lay audience, but it references reputable research and it's extremely interesting. _URL_0_" ]	[ "It's already done. The first ones were built decades ago. They actually focus the light onto a tower that has a molten salt running through it, which carries and stores heat more effectively than water. It's then used to heat water, to make steam, to run a turbine. Because the salt stores heat so well, electricity...
Why do slugs and snails suddenly appear when it has rained, what attracts them and where do they come from?	[ "They're trying not to drown. So they go to high ground that isn't flooded. Ie: the surface, or paved areas. This is where humans are, so we see them." ]	[ "Momentum. Ideally, all the water wants to go straight down the drain. But the drain is only so big, so not all the water can fit, but it still wants to keep moving. So instead of moving straight down the drain, it starts circle around the drain. As for clockwise vs. counterclockwise, it's not about Coriolis forc...
Sexual Violence is a key factor in multiple areas of the Roman foundational myth; How did this impact the understanding and treatment of such crimes within Roman society?	[ "I recall hearing of one element present in Roman sexuality, being that they were very into the concepts of \"givers\" and \"takers\", and that the balance of this was more important than genders themselves, hence their surprising historical leniency towards homosexuality or even the relationships with children. D...	[ "In addition to [Pompeiian graffiti](_URL_1_) and other [epigraphy](_URL_3_), much of which was quite crude, we also have the books for a number of comedic plays by [Plautus](_URL_4_) and [Terence](_URL_0_) and satirical poems by [Horace](_URL_5_) and [Juvenal](_URL_2_). And what were they like? Much like humor in ...
In images that capture noticeable lens flare, what determines the shape of the 'spots' (some are 5, 6, 7+ sided, some appear circular)?	[ "Lens flares are produced when stray light (from a very bright source) gets through the camera aperture (at a wide angle) and undergoes then undergoes a bunch of secondary reflections within the camera optics. The shapes you are seeing are shapes of the different camera [apertures](_URL_0_)." ]	[ "Neither. The planets orbit the Sun in circles (to a good approximation). That means they stay at the same distance. That is not useful if you want to go to other planets or leave the solar system. Interplanetary probes follow elliptic orbits. To get to Mars, for example, the orbit has its perihelion (the closest p...
Why is it that the deepest parts of the ocean can get down to -2 degrees Celsius, without freezing at 0 Celsius?	[ "The high concentration of salts (ionic compounds, including but not limited to sodium chloride) and other dissolved compounds lower the freezing point of the water. It's called freezing point depression, and the freezing point change can be calculated by the following formula (sorry, I don't know how to make symbo...	[ "You're right to be confused. It is 100% wrong as depicted in the movie, and a lot of people of wondered about why they made such a grave error considering the rest of the movie was somewhat realistic. It is likely that the reason this happens in the movie is that it makes things more dramatic. Artistic license i...
Why are vinyl records popular/what is the benefit?	[ "The trend in the recording industry is louder = better, due to when most people hear music, then hear it again louder they say it sounds \"better\". So music printed on CDs is pushed very loud. However, it's not possible to do this on Vinyl records as the grooves in which the needle rides will end up too shallow, ...	[ "This is a very common question. You can use search to find [all the other really good answers](_URL_0_ ). This is instant, and faster than ust typing in your question every time. It's a way of cheating elections. Read the others, and then ask a more specific question." ]
In your opinion what was the historical inspiration behind Tolkiens Rohan?	[ "Tolkien's Kingdom of Rohan is somewhat based on the Goths, but is also heavily influenced by Anglo-Saxon England and, to some extent, early medieval Scandinavia. Tolkien was a lecturer in early medieval languages and based the language of the Rohirrim - later dubbed 'Rohirric' mostly in Old English. Most Rohirric ...	[ "This is a pretty common question here; here's some links from the FAQ: _URL_2_ _URL_4_ and a few others that have been posted over the years: _URL_3_ _URL_1_ _URL_0_ Most posts agree that it is largely a post-war pop phenomenon with fairly little evidence to support it." ]
Why don’t infinitive verbs in English have an implied “to” before them like other Latin languages (i.e. comer = to eat or Faire = to do).	[ "English isn't a latin language. Although it has borrowed heavily from Latin over the years, the root language is early German and retains a different grammar structure." ]	[ "They do, they teach math and reading. Here is the thing there are arguably 100s of subjects everyone thinks should be taught and there is just not enough time to teach all those things. Cooking, nutrition, personal finance, invest, car repair, home repairs, ect.. However all those things are really just reading c...
How do the heart rate monitors on gym equipment work?	[ "They detect the tiny ECG potential between your hands on the hand grips, and process the signal to extract heart rate. Actuation of your heart muscles is by nerve impulses which are electrical. These electrical signals propagate through the body, which is a fairly decent conductor. There are a few microvolts of si...	[ "They use a wavelength of light that is cancer causing. Do you want to sit under a cancer causing light? Plus, they aren't all that effective to stop, say a sneeze from transmitting to another person. It takes some time to kill the germs." ]
What would walking tangential to the earths curve appear like?	[ "For small distances (much smaller than the radius of Earth) you can approximate the spherical Earth as a paraboloid. If you walk in one direction the distance between tangent and surface will grow quadratically. For larger distances this is no longer true and it depends on how you measure this distance." ]	[ "New Horizon and the voyager spacecraft are a few light hours away. The Earth doesn't actually move that much in that time frame. The signals they send out are not collimated that much. Over time they will spread out and cover enough area that antennas on Earth can pick up that signal. Both Voyager probes have left...
What make a person gorgeous and why? Also, what makes a person ugly and why?	[ "There are multiple articles and studies done on this, but basically it goes back to our survival instincts/days of early man. It wasn't about beauty, but a healthy partner who could reproduce the best possible child. So not too skinny or fat meant they were eating right, symmetry is a big thing- subconsciously, if...	[ "It is down to the combination of the genes you get half the genes from your mother and half from your father but those genes are an almost random selection of those genes which go to make up each so can be combined in trillions of different ways. Like saying you get half a pack of cards from one parent and half fr...
why does the ocean look like it isn’t moving when you’re flying above it?	[ "while you're flying over the ocean you have no reference point, and the ocean is one big cohesive body makes it hard to differentiate between one area and another, on the other hand, if there is a boat you'll be able to notice that the ocean is moving(or rather you)" ]	[ "Your eyes are perceiving that your body should be in one position (lying down in case of the linked gif), yet the signal from the balance centers in your ears are sending a different signal to your brain. This dissonance causes your brain to try and make you feel how you should based on the signal from your eyes."...
Why does temperature in the thermosphere increase with altitude?	[ "Solar radiation is forcing it. Just remember, heat and temperature are related but different. Thus, heat is the total amount of thermal energy in a volume whereas temperature is an average. If you have one highly energetic particle in 1 cubic meter, its temperature my by quite high but the thermal energy in it is ...	[ "The pressure doesn't keep increasing. It's pressurized to a certain level and stays there. Just as a balloon can hold pressure for days without the pressure increasing and bursting it. Edit: Or how a heavy book on a shelf doesn't press harder and harder until it breaks the shelf. The pressure has stabilized." ...
How far can I go back on Reddit?	[ "I think it ends at 1000 posts, so not very far. Other than search, a way to access old posts seem to be _URL_0_" ]	[ "Well, I'm glad people \"researched\" this. It started out as a poem or nursery-rhyme that was first published in England in 1784. The original line is this: > Roses are red, Violets are blue, Sugar is sweet, And so are you. [Source (Wikipedia)](_URL_0_). What occurred is basically an amazing \"lyric\" so-to-sa...
as a kid I hated the taste of broccoli, but as an adult I love it, how does that work?	[ "Children have a lot more taste buds than adults and those are a lot more sensitive to bitter sensations. Which makes Broccoli pretty much their mortal enemy. Over the years the amount of tastebuds reduces as does their sensitivity. That's why broccoli (and spinach) are a lot more enjoyable once you grow older." ]	[ "Or in my father's case, how come his seasonal allergies went away when he turned 45?" ]
Why does it feel so good to scratch an area that itches, but hurts to scratch anywhere else?	[ "\"Recent studies have identified areas of the brain that are activated by itch-inducing stimuli, including those involved in motor control to initiate scratching. The somatosensory cortex helps to localize and determine the intensity of the itch. The prefrontal cortex, which contributes to decision making, is cons...	[ "Simply put for the same reason drinking water when you're not thirsty isn't as refreshing as when you're REALLY thirsty. Anticipating the bodies' needs doesn't trigger the same reward responses in the brain as fulfilling a need that is already present. Your muscles don't NEED to stretch right now, so you can't ant...
Why does human excrement, though often varying in odor due to individual diets, retain such an unpleasant smell?	[ "The odor in feces is caused by hydrogen sulfide produced by bacteria in your gut." ]	[ "Think of nutrients as lego sculptures. Some are simple and easy for you to take apart, but sometimes they're really complicated and you have to ask your brother to help you take them apart. Beans have nutrients called complex oligosaccharides that are like really complicated lego sculptures. They're really hard to...
With the right gearing, could a bicycle easily get up to highway speeds?	[ "[Look at this graph](_URL_0_) it shows the power you'll need to produce to overcome drivetrain losses (purple) and wind resistance (tan?) at various speeds. A human can put out about 75W continuously, and to do more you need to be in shape. A professional cyclist can sustain about 400W for over an hour. Looking at...	[ "Legs would be blown into the windshield. [Here] (_URL_0_) is a youtube video showing exactly what would happen." ]
Why haven't we found any meteorites older than 4.5b years old?	[ "Actually, no. Meteorites are mostly the remnants of the molecular cloud that formed our solar system. We can use them to determine the age of the solar system, about 4.6 billion years. Small rocks like those that hit the Earth as meteorites can only form when a molecular cloud, like the one that made up the solar ...	[ "The gravitational pull of Jupiter is sufficient enough to disrupt the formation of anything that gets too big and simply rips it apart. And if you think about it, there's actually not that much material in the asteroid belt. [Ceres](_URL_0_), a object that has not even 2% of the Moon's mass, is 25% of the total ma...
How are braces attached to someone's teeth?	[ "They are \"anchored\" to your molars, with a little metal band which fully goes around it, and literally glued to your other teeth with a quick-drying glue which dries when exposed to UV light." ]	[ "To add a little context to it computer memory used to be wires and magnets as in [this picture](_URL_0_). So imagine on the left the wires are 1, 2, 3, 4, etc and at the bottom the wires are a, b, c, d, etc. If you run current through wires 1 and a the memory location 1a would be on, or 1. As /u/ramk13 noted toda...
Why do my eyeballs feel sore when I come out of the dark into the sunlight?	[ "There are two sets of muscles in your iris(the colored part of your eye), one to dialate(in response to low light) and another to constrict(in response to bright light) to ensure the approriate amount of light reaches the retina. As these are muscles, an abrupt change in brightness will force then to rapidly const...	[ "I'm not citing a source because this is just speculation, but mood and neurotransmitters probably have much do with it. You haven't established a routine, so your body doesn't have a circadian rhythm in terms of when to release which chemicals in the body. That might make you awake and alert and driven at noon on ...
Why do NFL players spit out the Gatorade they drink during the game?	[ "They just want wet their pallets. Minor rehydration. They don't want to guzzle Gatorade and cramp up." ]	[ "Likely the store was not able to sell it for a high enough price, compared to the price the distributor was willing to give for the return. It literally would cost them money to sell you the product, making it \"toxic\" As for the later call, they probably were denied the return, meaning they had to get rid of the...
Why are string theory and the theory of evolution both called theories but treated with different degrees of certainty?	[ "A theory in a scientific sense is a method to explain a phenomenon that CAN be verified. That last part is critical and is called being falsifiable. This means that a valid theory MUST be capable of being proven wrong through experiments or other methods. & #x200B; From the wiki page: > A scientific theory is an...	[ "The fossil record: we can look at the bones of animals that died a long time ago, and do special tests to tell us when they died. We can put this together to tell us what an animal, or its ancestor, looked like a long time ago. So far, they have shown up in the correct order. Speciation: say birds are blow...
What actually happens to electronics that causes them to completely fail forever during/after an EMP?	[ "It's like an electrical earthquake on the device. A cell phone is made of tiny conducting pieces that are sensitive to changes in electric fields. An EM pulse is basically a wave that makes electrons giggle and move really fast all over the place. THis can cause pieces of the electronic machine to burn out when an...	[ "It's similar to the principles behind a volcano. Pressure keeps building up and building up in one specific point. However, there is some strong material resisting that pressure, in the volcano case it is the dirt, rock, and metal sitting above it, and in the book case it's the pages sitting under the press. Howev...
Since the cold is a very common viral infection of the upper respiratory tract, why does it seem like it is most common during cold winter months?	[ "Although there is not quite a scientific consensus on this topic, various plausible reasons have been suggested--from the immune system being weakened by cold conditions to people spending more time indoors and thus spreading the virus more quickly." ]	[ "I would assume that its based off a variety of factors starting off with the cost of research and the estimate rate of return expected. The companies will want a quick return on their investment balanced off what people/insurance would be willing to pay and the expected prescription rate. So a common illness would...
In the Harry Potter books, students are seperated into houses and compete for points. Aside from the magic hat, is there any historical basis for this type of internal organization for British boarding schools?	[ "Just as an aside, I’m aware of a US public middle school that’s used “houses” since 1957. It would have had the same structure as Hogwarts. We had separate dining halls, separate core classes and separate administration (like house heads in Harry Potter). Shared library and gym etc. No real competitions though. T...	[ "I know at least as far back as the Middle Ages, Europeans used herbs and related plants in their homes and gardens. They planted certain plants aside others to deter pests. We call that companion planting these days. They also would chop up and spread such pest detering plants around the home or place inside bed s...
Why does the placebo effect work?	[ "Aspirin is not a placebo, it's a medicine." ]	[ "The best answer here is going to include the phrase \"confirmation bias\" I guarantee it." ]
How sports venues paid for with tax payer money maintain a monopoly on crappy, overpriced food when there are obvious alternatives?	[ "It's not a monopoly, it's more of a convenience issue. A restaurant can charge whatever they want, and if people don't want to pay, they can leave and find another restaurant. Sports venues charge so much for food simply because they can. Yes, you can go watch a game for just the price of the ticket, and eat befor...	[ "For the most part, this likely has to do with them all or mostly being in locations that are large population centers. This number also provides for relatively easy divisions with the same number of teams - NFL has 4 in each, MLB has 5, etc. Cities/Metro areas that support all Big 4 sports teams - Phoenix, LA/Ana...
Other than Booker T Washington, were there any other African American intellectuals who opposed civil rights for African Americans?	[ "Booker T Washington did not \"oppose civil rights\". Granted, he was the leader of one side, the less radical, more conciliatory side, in a debate within the African-American community regarding how to advance the plight of said community. In exchange for not pushing as militantly for civil rights, among other th...	[ "This is more a question of literature than history. Blindness is the most common deformity among seers and oracles, and it's a metaphor that works on multiple levels. The first is that wisdom has a price -- nothing comes free, especially not the gift of prophecy. The second is that only those who shut out the imme...
Alignment charts and what each title means	[ "They're based on the Dungeons and Dragons approach to morality for your created characters. In an effort to give players a framework in which to build their characters, D & D suggests a two-axis system. One of good vs evil, one of lawful vs chaotic. So it generates this grid of types, where you can be either end o...	[ "The really big picture is easy to explain: You are witness to the dying of an empire, and participate through different \"heroes\" in slowing its inevitable demise to something that resembles attrition." ]
Is watertight the same as airtight?	[ "Not at all. One of the most interesting demonstrations of this is breathable fish bags that allow gasses to pass but hold water...pretty handy for shipping fishes without suffocating them." ]	[ "I think what you're getting at is the [Law of Laplace](_URL_0_), which describes the pressure exerted by a balloon-like structure as 2hT/r, where h is the thickness of the balloon, T is the tension in the rubber, and r is the radius of the balloon. From that equation, you can see that as r increases the pressure w...
How can the 't' and 'h' in "parenthood" remain phonetically separate without blending together like they normally do when they are next to each other?	[ "They are separate because it s a compound word made from \"parent\" and \"hood.\" It remains separate because everyone says it separately and therefore everyone hears and learns it separately." ]	[ "That type of object is known as a tryptich, from the Greek to mean three-fold. They are an incredibly common phenomenon throughout the medieval period across Europe, particularly in works of devotional art, and could range in size from giant cathedral altarpieces to something the size of a matchbox that could be c...
Can electricity be used to convert ADP to ATP in the presence of excess inorganic phosphates?	[ "Possible? Absolutely. Efficient? much harder to say. The cell uses metabolic energy to make a proton gradient across a membrane. The passage of protons down this gradient is what supplies the energy to make ATP from ADP and inorganic phosphate. If you could use electric potential to build the proton gradient, you...	[ "Usually this is done by parametric downconversion of light from laser. The light goes through fibers, not much to see. Here is a diy method with gamma photons from positron annihilation: _URL_0_" ]
Why exactly can't we divide by zero?	[ "Let me try an alternate route of explaining this that I've found to be helpful to me before. Instead of thinking about dividing by zero, let's think about multiplying by zero. Namely, the fact that anything multiplied by zero is zero. Now, let's set up an equation where we would attempt to divide 7 by zero. 7 / 0 ...	[ "This video created by Vsauce 3 (Jake Roper) does a very good job explaining this: _URL_1_ I hope this answers your question. He also did another video on a simmilar line of - could you survive: _URL_0_" ]
What happens to the electricity in a cord when it's unplugged from the wall?	[ "As soon as the wall switch or device switch is set to off, there is nothing to push the electrons down the wire, so they stop moving. Consider electricity to be the movement of electrons in a wire, and we can harness that movement to do work - heat an element, create a magnetic field to turn a motor, energise ...	[ "A seed would be confused and probably pick a random direction to grow. Astronauts have special ways in which they help seeds decide which direction to grow. If it's already a plant, and then you took away the light, it would ultimately stop growing very quickly, but for a while it would continue growing the direct...
Who were the Philistines, and how did they become a go-to reference for a group lacking in culture and sophistication? Who originally was making the reference?	[ "There's lots to say about the Philistines, but you might find [my previous response about the Philistines](_URL_0_) useful for answering your question of who the Philistines were. Hopefully someone will chime in about the term's use as a pejorative." ]	[ "I'll explain the literal meaning when you're older, but I can explain what it means when you hear it used on reddit. Let's say you think cats are better than dogs. Not everybody thinks this. Imagine that in your classroom, about half the kids liked cats and half liked dogs. There would be lots of arguing if the te...
Why are certain cancers (brain, breast, testicular) only affect certain organs of the body.	[ "Cancer is not (usually) genetic in the sense that it is something you're born with in your DNA. It happens when the DNA is one or more of your cells mutate into cancer cells, by exposure to radiation, certain chemicals, etc. The cancer starts in whatever part of the body has its cells mutated, and if left unchecke...	[ "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...
At what point were medieval battles fought by professionals instead of the stereotypical peasant levies?	[ "I don't want to discourage further answers but similar questions have been asked in the past. The conclusion, at least with regards to the middle ages, seems to be that peasant levies were relatively rare. Here are some of the topics on the subject, with answers by /u/Anayalator, /u/MI13, /u/bigbluepanda and /u/Ri...	[ "hi! Could you clarify the scope of this question? Are you mainly asking about practices in Scotland / the British Isles roughly around the Civil Wars, or landowners anytime anywhere? [hint: [say the former](_URL_0_) ]" ]
How do plants and trees "know what to do"	[ "They don't have a central nervous system - their cells are largely autonomous and just act according to simple instructions. For instance, when the cells in a grass-like plant receive sufficient amounts of nutrients, water and sugar energy (from sunlight) they will initiate seed production. Much like the human bod...	[ "Animal intelligence is a strange thing. I think that some dogs develop a concept of face recognition, while others might not use it. It is like with the [dogs and the magician that makes it look like the wiener is floating in the air](_URL_0_), some dogs freak out and others aren't bothered even a bit." ]
why do large companies like McDonald's and Walmart constantly need to use commercials despite already being extremely popular?	[ "They're trying to reach the impulse buyers. You think \"Hmmm, I'm hungry...\" and a commercial for McDonalds comes on the radio and suddenly you think \"Hey, some mashed up sawdust nuggets from McDonalds sounds good!\"." ]	[ "They include the expected cost of those condiments in the cost of the meals they sell. So if you're buying a $4 cheeseburger, a couple of cents of that cost is covering the average amount of ketchup and stuff that people put on it. Like any average, that includes the people who use none and the people who grab 30 ...
Why do coughs take so long from which to recover?	[ "A lot of people struggle with this. There are a lot of reasons. A cough is a reflex that helps to keep our lungs and airway empty so that we can breathe. We get the urge to cough when we feel something in our throat or it is irritated. This can happen with allergies when mucus drips from our nose and sinuses into ...	[ "Travel, opening campaign offices in each state, television and radio ads, and paying everyone who works for the campaign, from those who research your opposition, to those who manage your website -- it's a year+ long process with a lot more than a few speeches and shaken babies." ]
Is there a reason for the increase in peanut allergies in the U.S. or is this just a side effect of medicine being able to better detect things?	[ "1) IS there an increase in peanut allergies in the US, or is it just more public awareness?" ]	[ "The popularity of comic book characters and acceptance of the geek subculture, mainly. people aren't scared to show that they enjoy these things anymore." ]
Why do parallel lines meet at infinity?	[ "It is metaphor, because nothing can get to infinity they do not meet." ]	[ "This question is pretty tough to imagine. Here's something that might help: Imagine you live on a [Möbius strip](_URL_0_). You're facing straight down at all times. You leave a ghost image of yourself as you go around the strip. Travel fully around and you get back to where you started, still looking the same way....
When you fall asleep in a car, why is it that you wake up a little while before getting to your destination?	[ "I've read that what seem to be long periods of sleep, like sleeping all night, are actually multiple shorter sleeps with brief intervals of being awake. But when you are only briefly awake, it fails to register in your long-term memory, so when you wake up in the morning, the last thing you can remember is some ti...	[ "There are a few factors at work here : Moſt chairs are deſigned to ſit at about knee height ; they generally ſupport your back, and more importantly, your butt and legs. Toilets are uſually lower, and they are made with a large hole in the middle, into which you ſink a little. This lower height, lack of ſupport,...
- Why do phones not require cooling vents but other small appliances do?	[ "Phones lack a cooling system because there's no room for that. It takes up way too much space for a pocket-size device. If that wasn't an issue, phones would've had vents. Besides, phones don't work as hard as other computers do. They are weaker, so they produce less heat. Still, they can get hot sometimes, especi...	[ "Patents must describe, in detail, a very specific technological improvement. They don't just cover the general idea of a product. A computer talking to you has been around for years. A computer understanding speech has been around for years. A computer following instructions has been around for years. Combining th...
How is nuclear power a source of clean energy when one has to spend energy on digging out the ores and subsequently refining them.	[ "Simply put, clean is a question of degrees. Coal and Oil have to be gotten out of the ground and refined as well. The components of a solar panel or wind farm likewise have to be gotten out of the ground and refined. The difference is that nuclear produces a lot more energy per unit of pollution created." ]	[ "Imagine you have a computer on your house. Now you want to connect that computer to your friend 100 miles away. How do you do it? You could lay a 100 mile cable, but do you have the permissions to dig up roads and pathways? You would use a company whose cables were already there, and just use that network of cab...

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