Do animals get pleasure out of mating and reproducing like humans do?

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• Do animals get pleasure out of mating and reproducing like humans do?
• What causes gum to have a consistency threshold? You chew for hours with the same consistency then it suddenly becomes gritty, loses all its stickyness, and starts to dissolve in your mouth within seconds.
• Is DNA stable in a vacuum?
• If I were stranded in space, could I propel myself throwing rocks?
• why do ice cubes crack in water, when they don't in air that is warmer than the water?
• Why does steam and hot 'irons' remove creases from clothes so quickly and efficiently, and what is the science behind what's happening on a molecular level?
• What would happen if you mixed blood and mercury?
• Splenda and other artificial sweeteners are "hundreds" or "thousands" of times sweeter. How do they measure this? They taste the same to me.
• Which is more important for keeping solids solid: Coulomb Repulsion or Electron Degeneracy Pressure?
• If I were to get enough viruses in a small space to be able to see them without a microscope, what would it look like?
• How do astronauts wash their clothes in space? Wouldn't a conventional washing machine make the station start rotating?
• If the acceleration of gravity is 9.81 m/s/s, then how come a rifle round will only drop less than two meters in the time it takes to go ~457 meters?
• Strange question, We are all familiar with the 'first' 4 dimensions, the 3 of space and 1 of time. My question is, seeing how there are theories involving other dimensions, are these other dimensions the manifestations of fields?
• What makes the spark mechanism in a safety lighter work?
• What makes the gas around Jupiter and Saturn part of the planet and not the atmosphere?
• Why does my shower curtain blow inwards while water is running?
• What was the universe like precisely one second after the Big Bang?
• How does covalent bonding work?
• How does General Relativity explain Moon tidal forces ?
• Could the accretion disk of a black hole emit enough energy to create a habitable zone?
• Can RADAR be used to detect smaller objects, like bullets?

Do animals get pleasure out of mating and reproducing like humans do? Posted: 07 Apr 2016 09:23 PM PDT Or do they just do it because of their neurochemostry without any "emotion"? submitted by /u/TheMuffinDragon [link] [comments]

What causes gum to have a consistency threshold? You chew for hours with the same consistency then it suddenly becomes gritty, loses all its stickyness, and starts to dissolve in your mouth within seconds. Posted: 07 Apr 2016 09:34 PM PDT Repost from a year ago with no answers https://www.reddit.com/r/askscience/comments/2vqt0l/what_causes_gum_to_have_a_consistency_threshold/ submitted by /u/Zannyth [link] [comments]

Is DNA stable in a vacuum? Posted: 07 Apr 2016 06:23 PM PDT submitted by /u/lordofcatan10 [link] [comments]

If I were stranded in space, could I propel myself throwing rocks? Posted: 07 Apr 2016 08:47 PM PDT Imagine I'm floating in space, trying to reach a space station 20 km away. Lets assume I have unlimited water, food and oxygen supply thanks to the unobtanium reactor in my backpack. I have a bag of rocks, samples from my mission. Could I reach the station throwing rocks in the opposite direction? if so, how many rocks would be required? Edit: grammar and such. submitted by /u/Fucking-Usernames [link] [comments]

why do ice cubes crack in water, when they don't in air that is warmer than the water? Posted: 07 Apr 2016 09:03 PM PDT submitted by /u/warmwhimsy [link] [comments]

Why does steam and hot 'irons' remove creases from clothes so quickly and efficiently, and what is the science behind what's happening on a molecular level? Posted: 08 Apr 2016 01:40 AM PDT submitted by /u/DraumrKopa [link] [comments]

What would happen if you mixed blood and mercury? Posted: 08 Apr 2016 01:02 AM PDT human blood. and of course outside of the human body in an appropriate container. submitted by /u/lumberanemone [link] [comments]

Splenda and other artificial sweeteners are "hundreds" or "thousands" of times sweeter. How do they measure this? They taste the same to me. Posted: 07 Apr 2016 07:32 PM PDT Artificial sweeteners like Splenda are said to be hundreds or thousands of times sweeter than real sugar. How do they measure this? And why is it that a teaspoon of splenda in one of those little packets tastes exactly as sweet as a teaspoon of sugar? Shouldn't my mind be absolutely blown by how sweet it is? submitted by /u/tahlyn [link] [comments]

Which is more important for keeping solids solid: Coulomb Repulsion or Electron Degeneracy Pressure? Posted: 08 Apr 2016 04:43 AM PDT I've seen it claimed that the electrostatic repulsion of atomic electrons is less important than the Pauli repulsion involved with overlapping electron orbitals when it comes to why solids can't pass through each other. Is there a well understood answer to this phenonmenon? submitted by /u/Senrade [link] [comments]

If I were to get enough viruses in a small space to be able to see them without a microscope, what would it look like? Posted: 08 Apr 2016 06:13 AM PDT How different would it look for different viruses? What color would it be? submitted by /u/Popopopper123 [link] [comments]

How do astronauts wash their clothes in space? Wouldn't a conventional washing machine make the station start rotating? Posted: 07 Apr 2016 09:19 PM PDT submitted by /u/PM_ME_UR_BoobsOrButt [link] [comments]

If the acceleration of gravity is 9.81 m/s/s, then how come a rifle round will only drop less than two meters in the time it takes to go ~457 meters? Posted: 07 Apr 2016 05:49 PM PDT submitted by /u/RavenMountain [link] [comments]

Strange question, We are all familiar with the 'first' 4 dimensions, the 3 of space and 1 of time. My question is, seeing how there are theories involving other dimensions, are these other dimensions the manifestations of fields? Posted: 07 Apr 2016 07:26 PM PDT To add further clarification is, lets say, the 5th dimension the magnetic field. Also how the field of gravity permeates these 'first' 4 dimensions. are the other dimensions the fields we observe in science such as the quantum field and so forth. submitted by /u/IdefendDucks [link] [comments]

What makes the spark mechanism in a safety lighter work? Posted: 08 Apr 2016 01:57 AM PDT Have you ever taken apart one of those long safety lighters, inside there is a button with wires running to it, which generates a spark when the button's pressed down. How does this work? I've searched for this before, but I've never found out how it actually works. http://i.imgur.com/KKOy4AA.jpg I couldn't find a picture of what I'm talking about... am I the only one that's taken one of these apart? submitted by /u/journey290 [link] [comments]

What makes the gas around Jupiter and Saturn part of the planet and not the atmosphere? Posted: 07 Apr 2016 12:00 PM PDT or is it just a really thick atmosphere? Sorry if it's a silly question. submitted by /u/Azarax95 [link] [comments]

Why does my shower curtain blow inwards while water is running? Posted: 07 Apr 2016 12:09 PM PDT All I want to do is have a shower without the curtain constantly sticking to various body parts. submitted by /u/PieSucker [link] [comments]

What was the universe like precisely one second after the Big Bang? Posted: 07 Apr 2016 09:44 PM PDT To the best of our knowledge. submitted by /u/Izzhov [link] [comments]

How does covalent bonding work? Posted: 08 Apr 2016 02:30 AM PDT I'm not sure .... submitted by /u/OfTheAshs [link] [comments]

How does General Relativity explain Moon tidal forces ? Posted: 08 Apr 2016 05:21 AM PDT If in General Relativity, gravity is nothing more than spacetime curvature ( aka bowling ball on a mattress ), how are the Moon's tidal 'forces' accounted for in terms of spacetime curvature ? submitted by /u/rmeman [link] [comments]

Could the accretion disk of a black hole emit enough energy to create a habitable zone? Posted: 07 Apr 2016 10:41 PM PDT Hello, recently I've thought about some kind of scenario where a black hole could be the center of a solar system. I've read that the accretion disk of large black holes (quasars for example, though these don't quite fit the solar system approach) gets pretty hot due to friction, so could this possibly generate enough heat to create an habitable zone where a planet with living beings could exist? submitted by /u/fade587 [link] [comments]

Can RADAR be used to detect smaller objects, like bullets? Posted: 08 Apr 2016 04:38 AM PDT I was wondering since RADAR can be used for imaging and detecting fast moving aircraft. Can a radar be used in lets say a Smaller military base to detect incoming bullet fire and where it came from/trajectory? If so, why is it not so common? Any information is much appreciated. Further reading on the subject would also be great, I'm really interested in the capabilities of this technology. submitted by /u/djd3ath [link] [comments]

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Why is easier to balance at bicycle while moving rather standing in one place?

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• Why is easier to balance at bicycle while moving rather standing in one place?
• What are the largest particles for which we have showns there to be an interference pattern when using them in a double slit experiment?
• High powered Lasers, can they 'clean' other contaminants, such as radiation as this video claims?
• Is there a finite size and mass that a black hole cannot surpass? If so, why? If not, why not?
• Why are opals iridescent?
• If black holes do not emit any light. Why isn't it obvious if there is a super massive black at the centre of a galaxy? Surely there would just be a massive region of space with absolutely nothing present?
• What advances in psychology/psychiatry have led to the greatest increases in human welfare?
• If a white dwarf comes close to an ordinary star could it "steal" enough material to start fusing hydrogen again?
• Could a human's strength overcome the strong nuclear force in a single atomic nucleus?
• Does Viscosity have anything to do with Mass of a liquid?
• What is the difference between a nuclear bomb, an atomic bomb and a hydrogen bomb and which one is the most destructive?
• Is the Kübler-Ross model of grief (5 stages of grief) still considered valid?
• Does the atmosphere get colder the higher up you go?
• Before Gauss, if someone came up with a probability distribution only slightly different from his normal distribution, would it have persisted in mathematics?
• If big cats don't purr, then what's going on in this video? (Link in text)
• how come when we study individual atoms they arent teleporting and rapidly changing states by quantum mechanics?
• How are physicists so sure dark matter exists as opposed to the theory being wrong?
• Is there a binary number which can be represented perfectly, where it cannot be represented perfectly in a decimal form?
• How strong of an Electric Field can humans be in before Dielectric Breakdown makes it unliveable? would something else make the situation unliveable before this even occurs?
• Is peanut butter a solid or a liquid?
• How do multi-dimensional matrices work (e.g., multiplication of 2 4D-matrices)?
• If I rotate an object, do its atoms rotate too?

Why is easier to balance at bicycle while moving rather standing in one place? Posted: 07 Apr 2016 05:08 AM PDT Similar to when i want to balance a plate at the top of a stick. I have to spin it. submitted by /u/sadam23 [link] [comments]

What are the largest particles for which we have showns there to be an interference pattern when using them in a double slit experiment? Posted: 07 Apr 2016 04:26 AM PDT i know that it has been done with c60 molecules, but that was back in 1999. submitted by /u/JanEric1 [link] [comments]

High powered Lasers, can they 'clean' other contaminants, such as radiation as this video claims? Posted: 07 Apr 2016 04:55 AM PDT I apologize for being very ignorant, but I saw somewhere that high powered cleaning lasers can be used for 'nuclear decontamination.' Is this actually true? If so, how? My understanding is that the laser reacts with a darker material than what is reflective underneath and strips the 'contaminant' away without harming the reflective surface, is nuclear contamination something that is less reflective than metal? Or is this video talking out of its ass? Can emissions of radiation clean radioactivity? If so, how? Source: https://m.youtube.com/watch?v=mSP1vH7-t7s submitted by /u/ChemO2323 [link] [comments]

Is there a finite size and mass that a black hole cannot surpass? If so, why? If not, why not? Posted: 07 Apr 2016 05:32 AM PDT submitted by /u/HartzyBoi [link] [comments]

Why are opals iridescent? Posted: 06 Apr 2016 04:18 PM PDT Inspired by this gif, I realize that while I work with crystals, I have no idea where the colours and brilliance of opals come from. What's going on inside these gemstones? submitted by /u/superhelical [link] [comments]

If black holes do not emit any light. Why isn't it obvious if there is a super massive black at the centre of a galaxy? Surely there would just be a massive region of space with absolutely nothing present? Posted: 07 Apr 2016 03:41 AM PDT I may be wrong but I'm almost certain I read somewhere that black holes are hard to detect. Given the above reasoning I can't understand why, hopefully you guys can explain this to me? submitted by /u/Danieldmc1 [link] [comments]

What advances in psychology/psychiatry have led to the greatest increases in human welfare? Posted: 06 Apr 2016 08:47 PM PDT To be clear, I'm looking for specific therapies or drugs that have been incredibly successful at treating a particular psychological condition that had previously caused immense amounts of suffering. submitted by /u/casebash [link] [comments]

If a white dwarf comes close to an ordinary star could it "steal" enough material to start fusing hydrogen again? Posted: 07 Apr 2016 05:40 AM PDT Also, could a collision between two white dwarfs result in an ordinary star? submitted by /u/itz4mna [link] [comments]

Could a human's strength overcome the strong nuclear force in a single atomic nucleus? Posted: 07 Apr 2016 04:02 AM PDT In other words, could a human separate a proton and a neutron by pulling, if it were mechanically somehow possible to do? I realize this may be a very childish question, but I have no idea how strong the strong nuclear force actually is. I know it's incredibly strong compared to gravity, which we can easily resist on a macroscopic scale, but I'd like to get a clearer understanding. submitted by /u/Bay-D [link] [comments]

Does Viscosity have anything to do with Mass of a liquid? Posted: 06 Apr 2016 04:36 PM PDT submitted by /u/Ryeker [link] [comments]

What is the difference between a nuclear bomb, an atomic bomb and a hydrogen bomb and which one is the most destructive? Posted: 06 Apr 2016 03:13 PM PDT submitted by /u/DB_Cooper_lives [link] [comments]

Is the Kübler-Ross model of grief (5 stages of grief) still considered valid? Posted: 07 Apr 2016 02:16 AM PDT I know it's been challenged by other research, but does the psychology community still generally accept it? Did it go the way of Freud? submitted by /u/Rathwood [link] [comments]

Does the atmosphere get colder the higher up you go? Posted: 07 Apr 2016 04:13 AM PDT Shouldn't it get warmer since there is less atmosphere filtering? submitted by /u/Notsure_jr [link] [comments]

Before Gauss, if someone came up with a probability distribution only slightly different from his normal distribution, would it have persisted in mathematics? Posted: 07 Apr 2016 03:54 AM PDT Ok, so I have experience in statistics but I am no expert. I may be wrong, but I believe that the normal distribution can only perfectly describe itself, that is, there is no natural random variable out there that has a distribution that is exactly normal. In a sense it is just a good (in some cases very good) approximation of the behaviour of many observable natural phenomena. Now, before Gauss, say someone came up with a distribution that had many of the same features: - symmetrical about its mean - large amount of points relatively close to the mean. - continuous i.e. still with the distinctive bell shape. would this function have been as well received and persisted in modern mathematics? since it also would only perfectly describe itself and be a good approximation for many natural random variables. Thanks in advance submitted by /u/mhaste [link] [comments]

If big cats don't purr, then what's going on in this video? (Link in text) Posted: 07 Apr 2016 02:18 AM PDT See, I've always been told that the thing that separates big cats from small cats is that small cats can purr while big cats can't (with the exception of the cheetah). So what's going on here? That sounds like purring to me. He's clearly happy. Cats purr when they're happy. submitted by /u/ButtsexEurope [link] [comments]

how come when we study individual atoms they arent teleporting and rapidly changing states by quantum mechanics? Posted: 07 Apr 2016 02:00 AM PDT On the same note, why does quantum mechanics seem to disappear at a large scale? submitted by /u/youaresus [link] [comments]

How are physicists so sure dark matter exists as opposed to the theory being wrong? Posted: 06 Apr 2016 07:36 AM PDT Hi, Recently I was listening to a podcast which was talking about how dark matter is predicted to exist because of various phenomena which cannot be explained with General Relativity could be if it existed, and they seemed pretty sure that they would be able to detect the dark matter. How is it that physicists think that dark matter exists as opposed to the theory being wrong, it seems like a bit of a fluke - like Vulcan to explain the differences in Mercury's orbit instead of the theory being wrong (Namely going from Newton's to Einstein's theory). Many of the reasons I have heard are typically either the theory has not been wrong yet (which seems a bit silly - Newton's theory wasn't shown to not be accurate for quite some time) or that General Relativity is so 'nice' that it wouldn't seem right that it is wrong (which seems even worse - as Feynman said 'It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.'). Thank you. submitted by /u/OrangePinyata [link] [comments]

Is there a binary number which can be represented perfectly, where it cannot be represented perfectly in a decimal form? Posted: 06 Apr 2016 11:11 AM PDT There are certain fractions which cannot be represented using a finite amount of digits. For example, 1/3 = 0.33333..... We can never truly represent 1/3 as a decimal with a finite number of digits. Similarly, there are certain numbers which cannot be represented perfectly in binary - 1/3 is one of these numbers. However, 0.1 is also one of these numbers. You can never correctly represent 1 tenth in binary with a finite number of digits, even though you CAN in base 10. Are there any numbers which can be represented in binary, but cannot be represented in denary? If not, why not? I've tried to think of an example but can't, and it's a toughie to google too. My guess is that there are no such numbers, because all binary numbers can be made up by adding together the fractions 1/(2n) depending on the place of the current digit. submitted by /u/ipe369 [link] [comments]

How strong of an Electric Field can humans be in before Dielectric Breakdown makes it unliveable? would something else make the situation unliveable before this even occurs? Posted: 06 Apr 2016 11:55 AM PDT submitted by /u/e_ruston [link] [comments]

Is peanut butter a solid or a liquid? Posted: 06 Apr 2016 03:18 PM PDT its been a long argument between a friend and I (both work in medical labs). submitted by /u/sammccarty [link] [comments]

How do multi-dimensional matrices work (e.g., multiplication of 2 4D-matrices)? Posted: 07 Apr 2016 02:14 AM PDT I just can't wrap my head around matrices with higher dimensionality. E.g., something like X = A * B, where A, B in |Ra x b x c x d. I can't imagine how this would work and am also not able to find a general rule for how to multiply matrices like these. submitted by /u/Graebson [link] [comments]

If I rotate an object, do its atoms rotate too? Posted: 06 Apr 2016 09:41 PM PDT Basically what I am asking is when I rotate, say, a metal bar, its orientation changes. But do the atoms that comprise it change their orientation with it, or do they remain static in their orientation? Alternately, is the atom's orientation just random and unset, and just constantly changing direction regardless of what I do to the object's position? submitted by /u/Liam_Shotson [link] [comments]

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Why are the "I'm not a robot" captcha checkboxes separate from the actual action button? Why can't the button itself do the human detection?

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• Why are the "I'm not a robot" captcha checkboxes separate from the actual action button? Why can't the button itself do the human detection?
• To what extent, if any, is finished concrete such as that found in most urban structures reuseable and recyclable?
• How does carbon dating accurately work considering all of the molecules likely come from beyond ancient supernova?
• How deep do Ocean currents go? Do they affect the water at the bottom of areas like the Mariana Trench?
• What would be the result if we somehow trap photons in closed metallic sphere that is as reflective as a mirror on the inside?
• Are there different mitochondrial "Eves" found in the DNA of ancient humans?
• Why does rain come down as drops and not all at once?
• Shouldn't all multicellular organisms develop some sort of cancer given enough time?
• What makes the electronic configurations of transition metals so unique?
• why do all atomic masses have decimals if there are some elements that only have one isotope?
• How does the drug 5-fluoroorotic acid select against URA3 in haploid S. cerevisiae?
• How did the discovery of DNA affect the field of taxonomy? Were dozens of species 'wiped out' by discovery of identical genetic profiles?
• Does quantum entanglement allow us to study some of the paradoxes associated with time travel?
• is there a reason our map is the direction it is?
• What causes light to slow when it travels through a medium?
• Is is theoretically possible for us on earth to create all the elements Synthetically?
• Is space the same as distance?
• Is there such a thing as an "anti" catalyst?
• So stars ever flat out collide during the rotation of a galaxy?
• Why is there no desert zone between the temperate and tropical zones on the Asian east coast?
• Are humans capable of Unihemispheric Slow-wave Sleep?
• Can any bacteria survive the boiling point of water?

Why are the "I'm not a robot" captcha checkboxes separate from the actual action button? Why can't the button itself do the human detection? Posted: 05 Apr 2016 07:55 AM PDT submitted by /u/koleslaw [link] [comments]

To what extent, if any, is finished concrete such as that found in most urban structures reuseable and recyclable? Posted: 06 Apr 2016 05:38 AM PDT Just wondering about limestones as a finite resource for the concrete industry. What are the constraints on the efficiency of the hypothetical recycling of concrete? If it is technically possible, what would be the economic constraints on doing so? submitted by /u/Gargatua13013 [link] [comments]

How does carbon dating accurately work considering all of the molecules likely come from beyond ancient supernova? Posted: 06 Apr 2016 06:55 AM PDT I'm just confused. submitted by /u/tim_buck2 [link] [comments]

How deep do Ocean currents go? Do they affect the water at the bottom of areas like the Mariana Trench? Posted: 05 Apr 2016 07:38 AM PDT I was wondering if the water that sits at the bottom of some of the deepest trenches ever circulates with the rest of the water above it. Or is the water that's down there now, the same water that's been down there for thousands of years? submitted by /u/gefasel [link] [comments]

What would be the result if we somehow trap photons in closed metallic sphere that is as reflective as a mirror on the inside? Posted: 05 Apr 2016 09:40 PM PDT Would that would produce heat from all the back and forth reflection? EDIT: I am assuming 100% reflectivity. submitted by /u/0x08F437 [link] [comments]

Are there different mitochondrial "Eves" found in the DNA of ancient humans? Posted: 05 Apr 2016 09:41 PM PDT I'm aware of analyses of mitochondrial DNA that give us a general age for the female ancestor of all current humans, but have similar analyses been done on more ancient human remains (the more ancient the better) that indicate a different mitochondrial "Eve" for these ancient populations? submitted by /u/Atheos_canadensis [link] [comments]

Why does rain come down as drops and not all at once? Posted: 05 Apr 2016 07:42 AM PDT submitted by /u/Scorpian700 [link] [comments]

Shouldn't all multicellular organisms develop some sort of cancer given enough time? Posted: 05 Apr 2016 10:11 PM PDT submitted by /u/iamthegratest [link] [comments]

What makes the electronic configurations of transition metals so unique? Posted: 05 Apr 2016 06:30 PM PDT Current undergrad here taking a level 1000 course. (By unique I meant that I'm unable to grasp what's going on microscopically.. :( ) According to the one electron system approximation/model, the 4s atomic orbitals have a lower energy levels, translating into stability for the system and thus getting filled first. This leads to (n)s subshells being filled first, before moving into (n-1)d subshells. Traditionally, this would be that the electrons in the d subshells are of higher energy levels, and thus would be favorably removed when ionization occurs, yet this is not the case for transition metals e.g: Sr has electronic configuration [Ar]3d1 4s2 Sr+ has electronic configuration [Ar]3d1 4s1, where the electron is removed from the supposedly lower energy subshell (4s) instead of (3d). This question then extends to Nickel, which has electronic configuration: Ni = [Ar] 3d8 4s2 Ni+ = [Ar] 3d9, indicating a simultaneous removal of an electron from the s subshell and the de-excitation into the d subshell. Is there an explanation for what is occurring here? I have done some reading which shows plots of energy levels of 4s and 3d subshells, indicating a crossover at around Z=21 (which is Sc), from thereupon which the 3d orbital has lower energy than the 4s orbital with an increasing energy gap. What is the significance of the gap here? I have slight exposure to Schrodinger's equations and energy level calculations, but is there an explanation besides the math which would help my understanding? Thanks in advance! submitted by /u/Randilicious [link] [comments]

why do all atomic masses have decimals if there are some elements that only have one isotope? Posted: 05 Apr 2016 06:34 PM PDT Atomic masses are the weighted average of all the isotopes of the element; hence, the atomic mass is always in decimal form as a fractional average. But if some elements only have one isotope ( as is known (e.g. see digipac.ca/chemical/molemass/isotope1.htm), why would the atomic mass be in decimal form? submitted by /u/sue1424 [link] [comments]

How does the drug 5-fluoroorotic acid select against URA3 in haploid S. cerevisiae? Posted: 05 Apr 2016 08:44 PM PDT From my understanding, diploid yeast strains, specifically in Candida albicans, select against URA3 through homologous recombination. How does this selection work in a haploid strain? I've only been told that it "works" and I'm curious as to the mechanism of the selection. submitted by /u/bjonik33 [link] [comments]

How did the discovery of DNA affect the field of taxonomy? Were dozens of species 'wiped out' by discovery of identical genetic profiles? Posted: 05 Apr 2016 07:42 AM PDT Also, was there resistance from the taxonomy community due to the prestige was attached to naming new species? Are there species still considered 'distinct' despite functionally being identical genetically? submitted by /u/Psyladine [link] [comments]

Does quantum entanglement allow us to study some of the paradoxes associated with time travel? Posted: 05 Apr 2016 06:03 PM PDT I recently came across this fascinating video of the Delayed Choice Quantum Eraser Experiment where a single photon passes through a double-slitted barrier and is subsequently split by a prism into two entangled photons. The first photon always goes to the same detector, D0. The second photon goes on a different path to meet a number of possible detectors. D0 doesn't give any way to determine which slit the original photon went through. However, the other detectors may or may not give that information, depending on their position. Since the two particles are entangled, D0 will show either an interference pattern or a clumped pattern based on which detector the second photon hits. These results are always 100% correlated. Based on the detector the second photon hits, you will always know the pattern at D0. Also, based on the pattern at D0, you will know which of the possible detectors the second particle must have hit. If the path to D0 is shorter than the paths to the other detectors, doesn't that mean we can predict the future with 100% certainty? If we make the paths of the other detectors extremely long, couldn't this give us time to attempt to change the results that we see at D0? In my mind this is analogous to the grandfather paradox - where the future is known, but somehow we are prevented from changing it. This experiment seems awfully simple to set up. And it would appear to be simple to change the results after seeing D0. Has this been done before or is there something I don't understand? Thanks!!!! submitted by /u/parthian_shot [link] [comments]

is there a reason our map is the direction it is? Posted: 05 Apr 2016 06:24 PM PDT i saw a pic of a map of florida that was upside down to help tourists or something. i started to wonder if there is any reason that north america is on the top of the map and south america is below it. is there a scientific reason or did they just have to pick a direction? submitted by /u/camaxtly [link] [comments]

What causes light to slow when it travels through a medium? Posted: 05 Apr 2016 08:23 AM PDT submitted by /u/BritaniaRulesTheWave [link] [comments]

Is is theoretically possible for us on earth to create all the elements Synthetically? Posted: 05 Apr 2016 07:09 PM PDT I know we have created a bunch of man-made elements. It also seems we can synthetically make a couple of natural ones. How about all the rest? submitted by /u/djamp42 [link] [comments]

Is space the same as distance? Posted: 05 Apr 2016 05:20 PM PDT And wouldn't distortions of space likewise distort everything within it to the same degree? submitted by /u/MonsignorFrollo [link] [comments]

Is there such a thing as an "anti" catalyst? Posted: 05 Apr 2016 04:30 PM PDT Basically, is there something that can raise the amount of energy needed for a reaction? submitted by /u/Homato [link] [comments]

So stars ever flat out collide during the rotation of a galaxy? Posted: 05 Apr 2016 01:17 PM PDT Like are we likely to collide with another star or is the gaps that big? submitted by /u/IM_NOT_DEADFOOL [link] [comments]

Why is there no desert zone between the temperate and tropical zones on the Asian east coast? Posted: 05 Apr 2016 12:40 PM PDT submitted by /u/Sint-Hieronymus [link] [comments]

Are humans capable of Unihemispheric Slow-wave Sleep? Posted: 05 Apr 2016 07:20 AM PDT https://en.wikipedia.org/wiki/Unihemispheric_slow-wave_sleep USWS has been observed in marine mammals. Evolution might favor human USWS sleepers because of the ability to 'keep watch' overnight from predators and hostile forces. Has USWS been observed in sleep deprived people such as soldiers stationed in hostile contexts for extended periods? Has USWS been observed in humans in the lab? Is it possible for a human to train themselves to enter USWS on demand? I've seen some hints that one hemisphere of the brain may need more sleep than the other. Does USWS always happen on the same side of the brain or can it happen on alternate hemispheres? If a person is completely blind in one eye, do the hemispheres still share the same Circadian Rhythm (no light stimulation of one hemisphere)? If so, do these people experience USWS more commonly? submitted by /u/vtjohnhurt [link] [comments]

Can any bacteria survive the boiling point of water? Posted: 05 Apr 2016 09:28 PM PDT submitted by /u/PotatoonMyBlade [link] [comments]

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