Why is human beard hair so much coarser than either body hair or head hair?

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• Why is human beard hair so much coarser than either body hair or head hair?
• Why does an electron beam not accelerate towards the earth?
• If water has mass and surface tension, what is the minimum mass for a drop of water?
• What really kills you when you die of thirst or hunger?
• In simple language, what's the distribution of mass of a galaxy (i.e. % of total mass as a function of radius)? I actually googled an article on the topic (see text) but it's too technical for me and I'd appreciate a simple explanation.
• Is a snake a head on a long tail, or a head on a long neck?
• how much energy would it take to vaporize the earth?
• Why is it that when cats have different breeds, they all kind of have the same body type, but when it comes to dog breeds they have much more drastic differences?
• What decides whether something burns up (like paper) or melts (like steel) when exposed to high temperatures?
• I tried to make double slit experiment but it didnt work. Where did I make a mistake?
• How do certain scents bring back memories?
• Are you exposed to less cosmic radiation when flying at night?
• What kinds of plastics give off noxious fumes when you bake them and what exactly is going on when this happens?
• How do birds avoid concussions considering the massive g forces they can experience while in flight?
• Would the engines of a Supersonic Jet sound different if you were sitting behind the wings compared to in front of them?
• Why is mars's core solid?
• Why is Riemanns hypothesis so important and what would it mean if someone proved it?
• Why do babies frequently wake up in the middle of the night?
• How is sea level measured?
• If we were on a spaceship traveling at a hypothetical 99.9% the speed of light and I spoke something to you, would you be able to hear me?
• Could liquid water exist in the asteroid belt?

Why is human beard hair so much coarser than either body hair or head hair? Posted: 09 May 2017 06:29 PM PDT Is it simply a matter of evolution? As beard hair shields a hunter's face against the elements while hunting, it would obviously be an advantage to have facial hair that is stiff and loose to mitigate wind chill or precipitation. What proteins are in beard hair which aren't found in other types of hair? I would love to have any information you can provide on this topic. submitted by /u/periwinkle52 [link] [comments]

Why does an electron beam not accelerate towards the earth? Posted: 10 May 2017 12:53 AM PDT Electrons have mass, so why are they not affected by gravity in the same way that other mass is? submitted by /u/Suroraj [link] [comments]

If water has mass and surface tension, what is the minimum mass for a drop of water? Posted: 09 May 2017 07:48 PM PDT submitted by /u/AlienRooster [link] [comments]

What really kills you when you die of thirst or hunger? Posted: 09 May 2017 09:12 PM PDT submitted by /u/RawnbladeZZ [link] [comments]

In simple language, what's the distribution of mass of a galaxy (i.e. % of total mass as a function of radius)? I actually googled an article on the topic (see text) but it's too technical for me and I'd appreciate a simple explanation. Posted: 10 May 2017 12:05 AM PDT The article: https://ned.ipac.caltech.edu/level5/Sept06/Avila/Avila2.html submitted by /u/thefourthchipmunk [link] [comments]

Is a snake a head on a long tail, or a head on a long neck? Posted: 09 May 2017 05:00 PM PDT submitted by /u/pizzapie232 [link] [comments]

how much energy would it take to vaporize the earth? Posted: 09 May 2017 10:19 PM PDT I am building a giant death ray and need to get the specs right! submitted by /u/andypant [link] [comments]

Why is it that when cats have different breeds, they all kind of have the same body type, but when it comes to dog breeds they have much more drastic differences? Posted: 09 May 2017 04:39 PM PDT submitted by /u/MyNameIsCropClock [link] [comments]

What decides whether something burns up (like paper) or melts (like steel) when exposed to high temperatures? Posted: 09 May 2017 06:14 PM PDT submitted by /u/JBman2001 [link] [comments]

I tried to make double slit experiment but it didnt work. Where did I make a mistake? Posted: 09 May 2017 01:26 PM PDT So I wanted to make my own double slit experiment and see light as a wave but I ended up seeing it as a particle I guess :( I carved two slits on a thick non translucent paper and used my phone LED light behind that paper ij order to make interference pattern occur on the wall in the dark room but that did not happen. All I got was the two bars illuminated on my wall. Basically tue light just went through rectangular slits and made two rectangular light bars on the wall and there was no interference pattern. I really want to see that pattern for myself. Please help me. Where did I go wrong? Is LED bad light source? Thank you everyone who shares their opinion on this submitted by /u/Dusan_Vicovac [link] [comments]

How do certain scents bring back memories? Posted: 09 May 2017 07:10 PM PDT submitted by /u/RebellionSpock [link] [comments]

Are you exposed to less cosmic radiation when flying at night? Posted: 10 May 2017 01:50 AM PDT I'm just trying to limit my exposure! submitted by /u/Bdejrjdhhs [link] [comments]

What kinds of plastics give off noxious fumes when you bake them and what exactly is going on when this happens? Posted: 09 May 2017 05:39 PM PDT submitted by /u/CarlWheezer6969 [link] [comments]

How do birds avoid concussions considering the massive g forces they can experience while in flight? Posted: 09 May 2017 06:28 PM PDT How do birds avoid concussions considering the massive g forces they must withstand while in flight? submitted by /u/READERmii [link] [comments]

Would the engines of a Supersonic Jet sound different if you were sitting behind the wings compared to in front of them? Posted: 09 May 2017 08:37 PM PDT Because the jet is moving faster than the speed of sound, would it sound different depending on where in the cabin you were, and if so, by how much? I know some sound will travel through the metal of the plane itself, but would it be quieter in the front of the jet? What got me considering this question specifically was the Concord Jet and how it could fly at twice the speed of sound and was the only "big" passenger airline that I know of. submitted by /u/Lockdownn [link] [comments]

Why is mars's core solid? Posted: 09 May 2017 08:20 PM PDT submitted by /u/DHallahan [link] [comments]

Why is Riemanns hypothesis so important and what would it mean if someone proved it? Posted: 09 May 2017 12:43 PM PDT submitted by /u/cleverdragon1 [link] [comments]

Why do babies frequently wake up in the middle of the night? Posted: 09 May 2017 04:07 PM PDT submitted by /u/TTuge [link] [comments]

How is sea level measured? Posted: 09 May 2017 07:41 PM PDT How is sea level measures accurately? Every ocean and sea has tides, therefore the water height is constantly moving, even without wind driving wave formation. So how is sea level measured, and is it actually different in different areas of the world? Is sea level considered high tide, low tide, average near shore, or something like x miles out to sea? Just struck me that in areas where the tides can change upwards of 20-30 feet (Inchon, South Korea; Mont St Michel, France), sea level is really quite relative. submitted by /u/Craig_Barcus [link] [comments]

If we were on a spaceship traveling at a hypothetical 99.9% the speed of light and I spoke something to you, would you be able to hear me? Posted: 09 May 2017 10:42 PM PDT Since 99.9% the speed of light is faster than the speed of sound. submitted by /u/danthrman [link] [comments]

Could liquid water exist in the asteroid belt? Posted: 09 May 2017 06:51 PM PDT Is it possible that an undiscovered body with liquid water, roughly the size of Ceres or smaller, could exist undiscovered in the habitable zone? Also could a dwarf planet composed of nothing but liquid water exist? Basically a giant ball of liquid water suspended in the cold of space...possibly translucent...Just curious... submitted by /u/swamprott [link] [comments]

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Are oceans necessary for a terrestrial planet to have sustained tectonic plate activity? Would a planet that was entirely covered by a single massive ocean have tectonic plate activity?

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• Are oceans necessary for a terrestrial planet to have sustained tectonic plate activity? Would a planet that was entirely covered by a single massive ocean have tectonic plate activity?
• How come, when we rub our eyes hard enough we see those weird colors and patterns?
• What is multiplication ?
• How do we get Vitamin D from the sun? Is it like photosynthesis in any way?
• [Biology] Are there people who can see further into the ultraviolet or infrared spectrum than the average person?
• Why is hemisphererectomy possible but some brain tumors are inoperable?
• When We Visualize Something, Does Our Brain Create One Image, or Two, as in One for Each Eye?
• Why isn't there a general formula for solving quintic polynomials like there is for quadratics, cubics and quartics?
• How do antibiotics destroy foreign bacteria without harming our own body as well?
• Why must neutrons in a nuclear reactor be slowed down to fission U-235 whereas in a nuclear bomb they do not?
• Are there circumstances where scientist and pharmaceutical companies don't have to go through the FDA to release a drug?
• Why is non-dairy coffee creamer so flammable?
• Do different shaped parachutes with similar surface area have the same travel time?
• Taxonomy: How are complicated phylogenetic trees arranged?
• What is the difference between a thermal camera and a nightvision camera? Both picture the IR-Spectrum, is it the same?
• Gravity keeps the planet in orbit, but what keeps the planet moving?
• Can crocodiles mate with alligators?
• What is the difference between Vitamin D from the Sun and Vitamin D from food sources?
• Did the first stars have planets?
• Basically what is keeping air from flooding to empty space?
• What is the fastest possible speed of a helicopter and why are they limited by this speed?
• How do cuttlefish know what color and texture to change to considering that they are color blind?
• Why is it that low energy neutrons can cause a nuclear fission reaction only if the atom that are reacting with has an odd mass (protons + neutrons) number?

Are oceans necessary for a terrestrial planet to have sustained tectonic plate activity? Would a planet that was entirely covered by a single massive ocean have tectonic plate activity? Posted: 08 May 2017 08:43 AM PDT Venus and Mars don't seems to have active tectonic plates (anymore), they also don't have oceans (anymore), is this a coincidence or are these facts related? I have heard discussions of hypothetical 'ocean planets' where a terrestrial body might be covered with single all-enveloping ocean several 100s of km thick. Would such an ocean have an effect on a planet's tectonic activity? submitted by /u/CalibanDrive [link] [comments]

How come, when we rub our eyes hard enough we see those weird colors and patterns? Posted: 09 May 2017 04:30 AM PDT submitted by /u/conradish [link] [comments]

What is multiplication ? Posted: 09 May 2017 05:56 AM PDT I was interviewing for a technical position, and in my resume I had written Mathematics as a hobby. Interviewer: Ah! So, your hobby is Mathematics. That's different. Tell me more about it. Me: Sir, I have been fascinated by Mathematics since I was a child. This crazy interest had led me to develop a very deep understanding and appreciation for the subject. Besides I have an intuition for Mathematics. I understand even the most complicated Mathematical concepts easily and intuitively. Interviewer: That's good. I will ask you something extremely simple. In fact, it is so fantastically simple that you probably learnt in first grade. Tell me what is the meaning of multiplication. Me: It's repeated addition. For eg. 5 X 3 = 5 + 5 + 5. Add 5 three times. Interviewer: Okay, then tell me how would you explain e x π ?How do you add something, (π)times? I opened my mouth. And then closed it. Then opened it. Then closed it again. Then came the shock; and the embarrassment; the realization that I didn't know What multiplication means!!! submitted by /u/F1restartXr [link] [comments]

How do we get Vitamin D from the sun? Is it like photosynthesis in any way? Posted: 08 May 2017 05:05 PM PDT submitted by /u/sorryfortakingurfood [link] [comments]

[Biology] Are there people who can see further into the ultraviolet or infrared spectrum than the average person? Posted: 09 May 2017 04:02 AM PDT submitted by /u/GooberMcNutly [link] [comments]

Why is hemisphererectomy possible but some brain tumors are inoperable? Posted: 09 May 2017 06:39 AM PDT If it is possible to remove one half of the brain and the person still lives (although he personality could be majorly altered depending if the removed half was dominant); how large are inoperable brain tumors then compared to this. And what makes them inoperable? submitted by /u/georgelappies [link] [comments]

When We Visualize Something, Does Our Brain Create One Image, or Two, as in One for Each Eye? Posted: 08 May 2017 07:07 PM PDT submitted by /u/omegacluster [link] [comments]

Why isn't there a general formula for solving quintic polynomials like there is for quadratics, cubics and quartics? Posted: 08 May 2017 03:47 PM PDT submitted by /u/not_athletic [link] [comments]

How do antibiotics destroy foreign bacteria without harming our own body as well? Posted: 08 May 2017 07:44 PM PDT submitted by /u/AinTunez [link] [comments]

Why must neutrons in a nuclear reactor be slowed down to fission U-235 whereas in a nuclear bomb they do not? Posted: 08 May 2017 06:19 PM PDT submitted by /u/FTLSquid [link] [comments]

Are there circumstances where scientist and pharmaceutical companies don't have to go through the FDA to release a drug? Posted: 08 May 2017 08:35 AM PDT (Not sure if the FDA is the organization that handles this type of thing but bare with me here) I'm talking in extreme circumstances. Like the human race is dying alarmingly fast, and if someone doesn't come up with a cure/vaccine soon we're headed for extinction. (i'm being very dramatic here but i'm getting to the point) In an instance where people are dying rapidly and science does come up with some drug that helps, i know that trials and testing take many years. But in the event the human race doesn't have that much time, can pharmaceutical companies release the drug without following the "necessary procedures"? submitted by /u/stephanynotstokes [link] [comments]

Why is non-dairy coffee creamer so flammable? Posted: 08 May 2017 03:39 PM PDT submitted by /u/Algern0nX [link] [comments]

Do different shaped parachutes with similar surface area have the same travel time? Posted: 08 May 2017 05:40 PM PDT If i drop a rectangular and a circular parachute with the same SA, from the same height and at the same time, will they both land on the ground at the same time (assuming everything is constant)? submitted by /u/0mendice [link] [comments]

Taxonomy: How are complicated phylogenetic trees arranged? Posted: 09 May 2017 06:33 AM PDT I'm not sure how to ask this. I've been reading about extinct animals and trying to compare their relation to modern animals (e.g Dimetrodon to Humans) via phylogenetic trees. However, the taxonomic order (i.e. phylum->class->order...) is stretched to superphylum and infraclass and frequently a class within another class (e.g. Mammalia within Synapsida or Aves within Reptilia). How is this order determined? Shouldn't something such as Aves be a subclass within Reptilia or Reptilia redefined as a class to repeat a taxonomic rank? submitted by /u/Jaco72 [link] [comments]

What is the difference between a thermal camera and a nightvision camera? Both picture the IR-Spectrum, is it the same? Posted: 09 May 2017 02:33 AM PDT submitted by /u/RiimoH [link] [comments]

Gravity keeps the planet in orbit, but what keeps the planet moving? Posted: 08 May 2017 07:59 PM PDT I always see a demo on how gravity works by using a trampoline with a heavy object in the middle as the sun and less heavier objects as the planets. The small objects will be thrown into trampoline and we can clearly see that they are orbiting around the heavier object. But in these demos, the smaller objects will stop moving and thus fall into the heavy object, so my question is what is something that keeps the planet moving endlessly? submitted by /u/reefwalkcuts [link] [comments]

Can crocodiles mate with alligators? Posted: 08 May 2017 02:44 PM PDT I've seen lions and tigers mating. I've seen horses and donkeys mating, but can a crocodile and alligator mate? They seem very similar like how tigers and lions are. I don't expect to get much of an answer, but it would be much appreciated. submitted by /u/that_guy2OOO [link] [comments]

What is the difference between Vitamin D from the Sun and Vitamin D from food sources? Posted: 08 May 2017 03:00 PM PDT How do the two vitamin D sources compare and contrast? submitted by /u/Mr_Ted_Stickle [link] [comments]

Did the first stars have planets? Posted: 08 May 2017 03:41 PM PDT submitted by /u/Varun2 [link] [comments]

Basically what is keeping air from flooding to empty space? Posted: 09 May 2017 01:55 AM PDT I know gravitational force is keeping things on earth. But since the atoms at the very end of atmosphere are subject to the lovest gravitational impact, what keeps them "inside" or are some gas eventually being released into the vacuum? Thats sounds unlikely because if thats the case, shouldn't we end up with no atmosphere eventually? submitted by /u/Cydonianknigh [link] [comments]

What is the fastest possible speed of a helicopter and why are they limited by this speed? Posted: 08 May 2017 05:28 PM PDT This topic came up when My friend and I were discussing supersonic travel. Jets were common, but why not helicopters? submitted by /u/EvilVargon [link] [comments]

How do cuttlefish know what color and texture to change to considering that they are color blind? Posted: 08 May 2017 04:19 PM PDT submitted by /u/McFluffigins [link] [comments]

Why is it that low energy neutrons can cause a nuclear fission reaction only if the atom that are reacting with has an odd mass (protons + neutrons) number? Posted: 08 May 2017 01:54 PM PDT submitted by /u/ApplePieHunter819 [link] [comments]

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Is the phrase, a star that shines twice as bright but half as long a true statement?

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• Is the phrase, a star that shines twice as bright but half as long a true statement?
• Do gas giants like Jupiter and Saturn have a "surface" somewhere down there?
• Why do matches stick to a magnet after being burnt, but not before?
• Is two identical ball shape but with different weight will fall a the same speed in air ?
• Is there agreement that birds evolved 135 Ma ago?
• If you fire a bullet out of a gun, and simultaneously drop a bullet to the ground, they will land at the same time?
• Is there a Universal Allergen? Some substance which causes an allergic reaction in EVERYONE?
• Graphene has an ultrahigh electron mobility, how does that effect the current capacity?
• In all of history, which species had the least total members?
• If the core of the sun is 15,000,000 K, why is the surface temperature only 5,772 K?
• What do storm clouds do that make them darker compared to regular, lighter clouds?
• If I soak paper in saturated salt water, will the paper conduct electricity?
• Is the strong force stronger between proton and proton than proton and neutron? If not, is it easier to eject a proton from the nucleus than a neutron?
• Can a beta radiation source change, so that it radiates for example gamma radiation?
• How do we know that Earth has a liquid outer core, but solid inner core?
• How does a computer processor generate heat?
• Are songs on the outside of a vinyl more detailed than those closer to the rotation axis?
• In a two-block system, the two blocks collide forming an inelastic collision. If kinetic energy is conserved how does the velocity of the center of mass remain the same?
• Would a box with walls made of superconductors have zero magnetic field inside of it?
• At an atomic level, what is happening when you wet a paper towel and it becomes weak and breaks easily?
• What causes light to refract and why is it so predictable?
• Massive black hole event horizon vs small black hole event horizon. Why are they different?
• Why do areas like western Scotland and Norway have such fragmented coastlines?

Is the phrase, a star that shines twice as bright but half as long a true statement? Posted: 07 May 2017 11:14 PM PDT What controls the brightness of a star? submitted by /u/RoskoJ [link] [comments]

Do gas giants like Jupiter and Saturn have a "surface" somewhere down there? Posted: 07 May 2017 01:40 PM PDT The way I imagine it now is a moon sized super dense core surrounded by massive amounts of gas. I've always been confused about this. submitted by /u/GordonSemen [link] [comments]

Why do matches stick to a magnet after being burnt, but not before? Posted: 08 May 2017 07:16 AM PDT submitted by /u/B_O_jp [link] [comments]

Is two identical ball shape but with different weight will fall a the same speed in air ? Posted: 08 May 2017 03:14 AM PDT submitted by /u/MonkeyDJay [link] [comments]

Is there agreement that birds evolved 135 Ma ago? Posted: 08 May 2017 03:13 AM PDT In this NYT article, they say: The 10,000 species of flying birds have tinkered only slightly with the design perfected over 135 million years ago, when Mesozoic birds evolved the modern flight stroke. I'm curious how they know so precisely when birds evolved. When I looked on Wikipedia I found two articles on bird fossils dated to the 135 Ma range. I'm quoting Wikipedia here but on we go. Wyleyia is known by a single worn humerus. Gallornis is known by a femur and a humerus. Is that enough to build consensus on the origin of birds? How is this grouping of birds defined? Are birds continously present in the fossil record form 135 Ma on? Because I heard in a lecture a couple of years back that the origin wasn't that certain and that avians only really bloomed agree the KT mass extinction. submitted by /u/WhyYouShouldCare [link] [comments]

If you fire a bullet out of a gun, and simultaneously drop a bullet to the ground, they will land at the same time? Posted: 07 May 2017 04:49 PM PDT I was listening to Joe Rogan taking to Neil DeGrasse Tyson. They were discussing snipers & the curvature of the Earth. Then Joe says "If you are holding a bullet in your hand & drop it, and fire a gun at the same time, they will both hit the ground simultaneously" (paraphrasing) Is that true? That seems outrageous! How does that work? submitted by /u/OberonClone [link] [comments]

Is there a Universal Allergen? Some substance which causes an allergic reaction in EVERYONE? Posted: 07 May 2017 05:16 PM PDT submitted by /u/ChetJettison [link] [comments]

Graphene has an ultrahigh electron mobility, how does that effect the current capacity? Posted: 08 May 2017 04:59 AM PDT Considering how graphene's electron mobility could reach to (200,000 cm2 V −1 s−1) could that lead to higher current flow? Can graphene carry magnitudes of current more than copper at a significantly low weight(considering the 1atom thickness x area x Density)? Considering how 1kA of current is carried by large(volume) and heavy bus bars, I can imagine graphene doing the same with a significantly lower weight. submitted by /u/9tothe9 [link] [comments]

In all of history, which species had the least total members? Posted: 07 May 2017 03:44 PM PDT I've been wondering lately which species, current or extinct, had the least total number of members throughout history. It's a pretty difficult thing to just try to search for online, because the only stuff that comes back is stuff about currently endangered animals. In fact, I made a reddit account (this one) just to ask someone this question. If you think about all the weird, obscure endemic species that have existed, some of them must have not had very many members of their species. Things that evolved in tiny, closed-off ecosystems (ie, Movile Cave) wouldn't have had the same numbers as things that exist/ed widely. For example, some cave-dwelling centipede that only ever has been found in one single cave may have only ever historically had a few hundred thousand members ever to exist, whereas krill has probably had quadrillions over history. So, does anyone know any specific species that fit this bill? Or is this a dumb/unanswerable question? What is, in effect, the rarest creature of all time? submitted by /u/Mr_Brumbo [link] [comments]

If the core of the sun is 15,000,000 K, why is the surface temperature only 5,772 K? Posted: 07 May 2017 11:38 PM PDT What is it that keeps the surface of the sun much cooler than the core of the sun? Why do the convective and radiative zones of the sun not transfer this heat to the surface? submitted by /u/Flandardly [link] [comments]

What do storm clouds do that make them darker compared to regular, lighter clouds? Posted: 07 May 2017 11:38 AM PDT submitted by /u/vespiqueen [link] [comments]

If I soak paper in saturated salt water, will the paper conduct electricity? Posted: 08 May 2017 03:14 AM PDT Hi there, I'm using Makey Makeys for this project where people can "hear" art by touching it. Currently, I am using graphite pencil and creating pencil-art by coloring in, which connects to the makey makey. But it gets tiring to keep coloring with 5B pencils for so long. Would soaking paper in salt water conduct electricity? (Paper will be dry later) submitted by /u/TheGuyfromRiften [link] [comments]

Is the strong force stronger between proton and proton than proton and neutron? If not, is it easier to eject a proton from the nucleus than a neutron? Posted: 07 May 2017 12:37 PM PDT submitted by /u/konrad8945 [link] [comments]

Can a beta radiation source change, so that it radiates for example gamma radiation? Posted: 08 May 2017 02:00 AM PDT submitted by /u/Kinetic_Cucumber [link] [comments]

How do we know that Earth has a liquid outer core, but solid inner core? Posted: 07 May 2017 03:03 PM PDT submitted by /u/GJenkss [link] [comments]

How does a computer processor generate heat? Posted: 07 May 2017 04:30 PM PDT submitted by /u/shoodpawoop9900 [link] [comments]

Are songs on the outside of a vinyl more detailed than those closer to the rotation axis? Posted: 07 May 2017 01:39 PM PDT Since the rotational speed doesn't change, the linear speed on the outer part of a vinyl is greater, right? So more information is being within a given time. Y'know, the needle will meet more "bumps" in one second when it's far from the rotation axis than when it's closer. Does this mean the music is more detailed? submitted by /u/Narcotle [link] [comments]

In a two-block system, the two blocks collide forming an inelastic collision. If kinetic energy is conserved how does the velocity of the center of mass remain the same? Posted: 07 May 2017 12:07 PM PDT Edit: Not conserved* submitted by /u/Th3_l3uster_ [link] [comments]

Would a box with walls made of superconductors have zero magnetic field inside of it? Posted: 07 May 2017 01:23 PM PDT If you constructed a small box made of superconductors which completely sealed the inside of the box, would the inside have zero magnetic field even when a magnet is brought near the outside? submitted by /u/ohpl [link] [comments]

At an atomic level, what is happening when you wet a paper towel and it becomes weak and breaks easily? Posted: 07 May 2017 09:17 AM PDT submitted by /u/DaCukiMonsta [link] [comments]

What causes light to refract and why is it so predictable? Posted: 07 May 2017 04:13 PM PDT I've read that light as an electromagnetic wave interacts with electrons in the material making them oscillate. The oscillating electrons then emit EM radiation (with a phase delay) which the initial wave interferes with. However I'm not quite sure how this results in the predicable behavior described by Snell's law. submitted by /u/AntePantePp [link] [comments]

Massive black hole event horizon vs small black hole event horizon. Why are they different? Posted: 07 May 2017 10:55 AM PDT Why can you theoretically cross the event horizon of a large black hole relatively unscathed, but cannot approach a small black hole's horizon without being destroyed beforehand? Shouldn't the forces felt be the same at the event horizon, hence that's why it's the horizon? submitted by /u/BobHopeWould [link] [comments]

Why do areas like western Scotland and Norway have such fragmented coastlines? Posted: 07 May 2017 09:22 AM PDT submitted by /u/TheSentinelsSorrow [link] [comments]

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