Are any unique properties expected to arise as matter gets even closer to absolute zero?

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• Are any unique properties expected to arise as matter gets even closer to absolute zero?
• What climate change models are currently available for use, and how small of a regional scale can they go down to?
• Are there any species which more or less completely die off every generation and rely on eggs to survive without the parents to continue the species?
• Why are the Galapagos Islands specifically so important to study?
• Is the current number of human beings alive higher or lower than the number of humans that have died?
• Is the ability to recall something from memory effected by how awake you were when you learned it?
• What parts of human vision are innate vs learnt?
• Could a Geologist Please Help Explain Limestone Layering?
• Relative to humans, snakes outer epithelial layer sheds much different than ours. I understand the human epidermis from human anatomy and was hoping someone could explain this process for a snake in which the outer layer all disconnects at once to shed a complete skin of the snake?
• Are vitamins more effective if you know what they do?
• Why do fruits get sweeter the longer you wait?
• How much does the centrifugal force of the earth’s rotation counteract gravity at the surface? If the earth wasn’t rotating, how heavy would a kilogram be at sea level?
• Is the global polar bear population increasing, or decreasing? There are a bunch of articles on either side, including fact-checks. Not looking for political stuff.
• Does the act of actively recalling old memories provide any physical benefits to the brain?
• We have geological and fossil evidence of the fluctuation in the ratio of gasses in the atmosphere 100’s of Ma back. What evidence do we have about fluctuations in atmospheric pressure?
• It is said that universes is always expanding but expanding onto what?
• If you chip your bone from an injury, what happens to it?
• What does a choloroplast actually need to survive?
• Can the Stern–Gerlach experiment measure spin direction?
• How does slime mold navigation differ from an ant colony finding food?
• is spaced repetition learning scientifically accepted and how does it work?
• Can you be/get immune to any kond of anaesthetic?

Are any unique properties expected to arise as matter gets even closer to absolute zero? Posted: 30 Mar 2019 06:48 PM PDT I am aware that many unique properties arise as things become very cold, but there seem to be a lot of efforts seeking to make matter as close to absolute zero as possible. Is this just an engineering demonstration, or do we expect different properties to emerge when something is, for example, 10E-15 kelvin versus 10E-10 kelvin? submitted by /u/LiqiudIlk [link] [comments]

What climate change models are currently available for use, and how small of a regional scale can they go down to? Posted: 30 Mar 2019 09:30 AM PDT I want to see how climate change will affect the temperature and humidity of my area in 25 years. How fine-tuned are the current maps for predicted regional changes? Are there any models that let you feed in weather data (from a local airport for example) and get out predicted changes? Are there any that would let me feed in temperature and humidity readings from my backyard and get super fine scale predictions? The reason I'm asking is because I want to if my area will be able to support certain crops in 25 years. I want to match up the conditions of my spot 25 years from now with the conditions of where that crop is grown currently. Edit: I've gotten a lot of great replies but they all require some thought and reading. I won't be able to reply to everyone but I wanted to thank this great community for all the info submitted by /u/fortylightbulbs [link] [comments]

Are there any species which more or less completely die off every generation and rely on eggs to survive without the parents to continue the species? Posted: 30 Mar 2019 07:08 PM PDT I thought about this today and thought it was an interesting concept. My first thought was that it seems entirely possible that an entire species of insect could almost entirely die off in the winter amd only survive due to eggs stored underground. Am I being dumb? Is this possible? Does such a species exist? submitted by /u/Nowhere_Man_Forever [link] [comments]

Why are the Galapagos Islands specifically so important to study? Posted: 30 Mar 2019 05:46 PM PDT I always see the Galapagos Islands as the big place that people are studying. I realize there are major historical discoveries that have happened there, but aren't there likely to be many archipelagos that are near a mainland that display the same amounts of natural selection and adaptive radiation? Are they just the "famous" archipelago? Is there a really unique situation there? Or are people building upon 100+ years of research in that specific place? submitted by /u/thinkofagoodnamedude [link] [comments]

Is the current number of human beings alive higher or lower than the number of humans that have died? Posted: 30 Mar 2019 09:24 AM PDT I don't know how to properly phrase this question so bare with me. In an exercise about problem solving techniques this question arose. Is the number of current human beings alive higher or lower than the total number of humans that have died since the human race exist (or some early point in history)? It's hard to define the boundaries but let's say we base our case in registered or estimated child mortality, perhaps? Of course it's a highly speculative question but id love to know if someone approached this matter before, and how. Thanks. submitted by /u/lordroderick [link] [comments]

Is the ability to recall something from memory effected by how awake you were when you learned it? Posted: 30 Mar 2019 06:13 PM PDT If I am studying and it is late at night and I'm tired, when I am fully rested how will my ability to remember what I was learning be effected. I work shifts and often do study for a few hours between 10pm and 1am. I was wondering if this is a poor way of learning. submitted by /u/Tom-tron [link] [comments]

What parts of human vision are innate vs learnt? Posted: 30 Mar 2019 04:43 PM PDT How much of the human vision ability are we innately born with and what parts do we learn? I understand that human vision is a broad area so its hard to list all features that we innately have vs learn and I also understand that we don't fully understand how the human vision process fully works yet. But I am hoping for some insight into what elements of human vision we learn. It may be easier to answer specific questions, so... We know that edge detection is performed. Is this innate or learned? We know that we place higher precedence/value on areas around edges vs homogenous areas for eg; on a blank white wall our eyes are drawn to the wall edges vs the wall centre. Do we know if this is learnt or innate? Obviously object detection (chairs, etc.) is learnt but what about object boundaries and association? For example a chair is made up of 4 legs, a back and seat do we innately know these 3 aspects are all associated/grouped together or do we learn this? Do we use depth/stereopsis to associate sub-objects? submitted by /u/sqzr2 [link] [comments]

Could a Geologist Please Help Explain Limestone Layering? Posted: 30 Mar 2019 09:25 PM PDT Thanks for helping out a lay person who is a geology enthusiast. What causes the abrupt and distinct color and texture differences in midwestern limestone bluffs? I understand that oceans laid down the layers. The questions are: What climate or ocean changes caused the different coloring? What changed in the ocean to make the layers so sharply distinct and different? Even the fossils change abruptly, from many to none. It seems to imply some big changes must have happened fast for laying to be so varied and distinct. Thanks again submitted by /u/Emwonk2 [link] [comments]

Relative to humans, snakes outer epithelial layer sheds much different than ours. I understand the human epidermis from human anatomy and was hoping someone could explain this process for a snake in which the outer layer all disconnects at once to shed a complete skin of the snake? Posted: 30 Mar 2019 05:09 PM PDT submitted by /u/randomemes831 [link] [comments]

Are vitamins more effective if you know what they do? Posted: 30 Mar 2019 02:38 PM PDT Essentially; does the placebo effect strengthen the effectiveness of vitamins? Especially since we know the vitamins are regulated and not sugar pills. submitted by /u/BroodPlatypus [link] [comments]

Why do fruits get sweeter the longer you wait? Posted: 30 Mar 2019 05:54 AM PDT submitted by /u/david1230561 [link] [comments]

How much does the centrifugal force of the earth’s rotation counteract gravity at the surface? If the earth wasn’t rotating, how heavy would a kilogram be at sea level? Posted: 30 Mar 2019 03:54 PM PDT I was reading about how the Gault asteroid is spinning so fast the surface material overcomes gravity and escapes. This made me wonder about the earth's rotation and how much centrifugal force is acting against the earth's own gravity. Would it make any measurable difference if there was no rotation? Would it be so much that we'd all be squashed by our own weight? submitted by /u/obijohn [link] [comments]

Is the global polar bear population increasing, or decreasing? There are a bunch of articles on either side, including fact-checks. Not looking for political stuff. Posted: 30 Mar 2019 07:42 AM PDT submitted by /u/M0stlyJustLooking [link] [comments]

Does the act of actively recalling old memories provide any physical benefits to the brain? Posted: 30 Mar 2019 10:15 AM PDT Also, could it provide similar benefits as meditation? submitted by /u/Battlejew420 [link] [comments]

We have geological and fossil evidence of the fluctuation in the ratio of gasses in the atmosphere 100’s of Ma back. What evidence do we have about fluctuations in atmospheric pressure? Posted: 30 Mar 2019 01:48 PM PDT Looking at the other planets in our solar system, particularly Venus, it is clear that the amount of atmosphere on a terrestrial planet is not dictated by gravity alone. And in the case of Mars we are fairly confident it can fluctuate by quite a bit over the life of a planet. Do we know if Earth's atmospheric pressure has changed substantially over its history? More specifically, how it has changed during the period of complex life? submitted by /u/Prosodism [link] [comments]

It is said that universes is always expanding but expanding onto what? Posted: 30 Mar 2019 07:19 AM PDT Like what's after the edge of our universe🤔🤔 submitted by /u/Astro_11 [link] [comments]

If you chip your bone from an injury, what happens to it? Posted: 30 Mar 2019 04:35 AM PDT submitted by /u/Roflpickle [link] [comments]

What does a choloroplast actually need to survive? Posted: 30 Mar 2019 08:19 AM PDT If I remember correctly, Choloroplasts are sort of autonomous "cells", trapped inside plat cells, reproducing on their own account. What do they actually need to live, what do they produce (atp i assume) and what do they need to produce that? submitted by /u/Plagiatus [link] [comments]

Can the Stern–Gerlach experiment measure spin direction? Posted: 30 Mar 2019 11:56 AM PDT As I understand, it just proves that spin is quantized and it can also measure the spin of individual particles, but not the direction of them. Is this true? Furthermore, if it can, how would differently facing spins appear in the output of the experiment? On a side note, mildly related to the main question: does a beam of positrons generated from pair production, separated from the electrons, have all their spins facing in the same direction? Thanks for the answers in advance! submitted by /u/fostmester69 [link] [comments]

How does slime mold navigation differ from an ant colony finding food? Posted: 30 Mar 2019 08:46 AM PDT I recently found these visualizations of physarum polycephalum and a short explanation, along with Wikipedia's summary. While obviously there are a million unanswered questions about how it works, it seems like at a basic level the mold's behavior is similar to an ant colony - spread out randomly and reinforce paths that lead to food. Having dealt with SIX ant intrusions recently, the biggest difference I noted is that ants seem somewhat less concerned with the shortest path. What are the other similarities and differences? submitted by /u/AppleGuySnake [link] [comments]

is spaced repetition learning scientifically accepted and how does it work? Posted: 30 Mar 2019 10:01 AM PDT submitted by /u/Rambozes [link] [comments]

Can you be/get immune to any kond of anaesthetic? Posted: 30 Mar 2019 01:15 PM PDT If so, how will they be treated submitted by /u/djbezza [link] [comments]

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The ocean is full of plastics: What are the primary sources of these plastics?

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• The ocean is full of plastics: What are the primary sources of these plastics?
• How do planes know that they are being targeted?
• Theoretically, could I perfectly vertically balance a string?
• When voltage is increased across a conductor, resulting in more current, is the number of moving charges increased, or are charges moving at a higher velocity, or both?
• How does the air get „sucked“ into our lungs when we breath?
• Could atoms composed of only neutrons exist?
• Would a rainbow in the sky have the same degree of curvature if the Earth was flat?
• How much do ones internal organs move around?
• Do objects physically change the wavelength of light or just absorb certain wavelengths and reflect others?
• Why is it that there are no green stars?
• Why don't brown dwarfs collapse into white dwarfs?
• Will our sun - after it goes white dwarf - just evaporate into nothing? Could it possibly become so cold, it forms a rocky stellar mass or a crust, like a planet?
• Would an X0 female (Turner Syndrome) and an XY male with a defective SRY gene be phenotypically the same?
• How to doctor's know they removed 100% of the cancer in someone after surgery?
• Are QFT And String Theory Opposed To One Another?
• How come over the counter medication offers to reduce fever, but fever is the product of our immune system?
• Is there a physical / mental difference between a medically-induced coma, and a "regular" coma?
• Why do cells die from low oxygen?
• What are evolutionary drugs? I was confused by this infographic

The ocean is full of plastics: What are the primary sources of these plastics? Posted: 29 Mar 2019 03:59 PM PDT Context: Lots of places are banning plastic bags and plastic straws and rarely also microbead soaps. That's well and good, but I don't know the source of the plastics in the ocean... as per that study that suggested that 60% of ocean life had plastic in their guts. (I can't find the original article). And then there's the DEEP ocean ... what is the nature of the plastic that's getting there? submitted by /u/Lokarin [link] [comments]

How do planes know that they are being targeted? Posted: 29 Mar 2019 01:50 PM PDT submitted by /u/klingerino [link] [comments]

Theoretically, could I perfectly vertically balance a string? Posted: 29 Mar 2019 08:16 PM PDT submitted by /u/MrUNoWoo [link] [comments]

When voltage is increased across a conductor, resulting in more current, is the number of moving charges increased, or are charges moving at a higher velocity, or both? Posted: 29 Mar 2019 08:55 PM PDT How is the answer different between metallic conductors, semiconductors, and electrolytes? submitted by /u/_niko [link] [comments]

How does the air get „sucked“ into our lungs when we breath? Posted: 29 Mar 2019 03:22 PM PDT submitted by /u/aviq-jonathan [link] [comments]

Could atoms composed of only neutrons exist? Posted: 29 Mar 2019 11:07 PM PDT submitted by /u/Chris_Robin [link] [comments]

Would a rainbow in the sky have the same degree of curvature if the Earth was flat? Posted: 29 Mar 2019 04:52 PM PDT submitted by /u/SZYQZY [link] [comments]

How much do ones internal organs move around? Posted: 29 Mar 2019 07:34 AM PDT Are they more or less just dangling or floating in liquid, or are they firmly supported from all sides? Does it vary very much from organ to organ? Can you damage your other organs the same way you can damage your brain by rapid motion and impact of organ on bone, ie rib, skull(rather than just external blunt force)? Are there any drastic, interesting differences between certain human vs animal organs? submitted by /u/Krabice [link] [comments]

Do objects physically change the wavelength of light or just absorb certain wavelengths and reflect others? Posted: 29 Mar 2019 08:09 AM PDT Also, how is light physically absorbed? What happens to it? Does it just hit the electrons and cause them to vibrate more? submitted by /u/DrBucket [link] [comments]

Why is it that there are no green stars? Posted: 29 Mar 2019 04:15 PM PDT [link] [comments]

Why don't brown dwarfs collapse into white dwarfs? Posted: 29 Mar 2019 03:42 PM PDT This was asked on /r/space and I was hoping some experts here could answer. At the end of a red dwarf's life, even the lowest mass red dwarfs are expected to become white dwarfs after fusion stops. What is the difference between a dead red dwarf and a slightly less massive brown dwarf after it stops fusing deuterium, that allows the red dwarf to collapse into an Earth-sized white dwarf, while the brown dwarf does not collapse and stays roughly the size of Jupiter? I assume the small difference in mass isn't the reason, so does it have something to do with the fact that a dead red dwarf is made mostly of helium while a brown dwarf is mostly hydrogen? If you could gather 70 Jupiter masses of helium together to try to form a helium brown dwarf, would it become a white dwarf instead? submitted by /u/jswhitten [link] [comments]

Will our sun - after it goes white dwarf - just evaporate into nothing? Could it possibly become so cold, it forms a rocky stellar mass or a crust, like a planet? Posted: 29 Mar 2019 07:37 AM PDT submitted by /u/chewy_mcchewster [link] [comments]

Would an X0 female (Turner Syndrome) and an XY male with a defective SRY gene be phenotypically the same? Posted: 29 Mar 2019 07:43 AM PDT submitted by /u/asteroidsiren43 [link] [comments]

How to doctor's know they removed 100% of the cancer in someone after surgery? Posted: 29 Mar 2019 09:07 AM PDT submitted by /u/I_like_ur_shoes [link] [comments]

Are QFT And String Theory Opposed To One Another? Posted: 29 Mar 2019 09:05 AM PDT This question is somewhat simple, I recently watched this lecture about Quantum Field Theory, and as I understood it, QFT is meant to answer the question: "What are the fundamental building blocks of nature?", and it came to my mind, String Theory also tries to answer that same question. ​ But are the two of them opposed to each other? I mean, if I understood QFT correctly, the whole idea behind it , is that all particles in existence are the results of ripples in their respective Quantum Field, so Electrons and Photons are ripples in the Quantum Electromagnetic Field, Quarks are ripple in the Quantum Quark Fields etc. etc. ​ But doesn't that idea clash with String Theory? I watched this video about ST, and if I understood Brian Greene correctly, String Theory states that all particles (and forces associated with those particles) are the results of Fundamental Strings vibrating in different ways, so if one of these strings vibrates in manner A the resulting particle is an Up Quark, if said strings vibrates in manner B the result is a Down Quark etc. etc. ​ Aren't these two thoughts against each other? ​ Please let me know if I misunderstood one or both theories. submitted by /u/IndisposedCrewman [link] [comments]

How come over the counter medication offers to reduce fever, but fever is the product of our immune system? Posted: 29 Mar 2019 07:20 AM PDT When encountering a pathogen, the human body intentionally warms up past 37°C in order to make it harder for said pathogen to function, spread etc. Why is it that over the counter medication, like paracetamol, aims to reduce fever? Isn't fever a good thing? And shouldn't it be maintained to get rid of the intruder? submitted by /u/Samuelinyo [link] [comments]

Is there a physical / mental difference between a medically-induced coma, and a "regular" coma? Posted: 29 Mar 2019 05:24 AM PDT And do people in the different types of coma have different experiences? This was prompted by an AskReddit thread asking about the experiences people have had in comas; most of the respondents had been in medically-induced comas, and it made me wonder about the differences. submitted by /u/dahamsta [link] [comments]

Why do cells die from low oxygen? Posted: 29 Mar 2019 06:44 AM PDT As far as found out from google, cells need oxygen to produce ATP , and necrose on low ATP levels. So why do cells do that? Why dont they just 'stand by' till they get more oxygen? submitted by /u/pacukluka [link] [comments]

What are evolutionary drugs? I was confused by this infographic Posted: 29 Mar 2019 07:41 AM PDT In the this infographic https://imgur.com/a/HjF2P ​ The first one, the green one, step 6 of Anti-Aging Genetic engineering is "developing evolutionary drugs using artificial selection to create symbiotes that increase lifespan. ​ What does this mean? What does this entail? What are evolutionary drugs and symbiotes. submitted by /u/Maximum777 [link] [comments]

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Google, 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

Im wondering as to why all the Birds ,Insects and Fish were very large back in the mesozoic age compared to what they are now?

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• Im wondering as to why all the Birds ,Insects and Fish were very large back in the mesozoic age compared to what they are now?
• Do you burn calories by thinking?
• Is it ammonium or ammonia that's part of the nitrogen cycle? Or both?
• Why are inflammatory drugs like prednisone used when your body is fighting the infection when the drug supposedly suppresses your immune system?
• Are HE Explosions additive?
• How do mosquitoes pierce skin?
• How does a neutron become part of an atom without a positive or negative charge? Could electrons orbit lone neutrons? Does that already happen?
• In practice, how can enantiomers have different characteristic such as smell or safety (in the case of drugs)?
• What causes an aftertaste? Why can it be so different to a food’s regular flavor?
• What's the difference between a psychopath and a sociopath?
• Why does banging 2 objects together produce sound? e.g. knocking on a door
• How does dark matter interact with sodium iodide?
• How do plungers work, and how is it so effective?
• How is the human brain responsible for 20% of our daily energy consumption? What does it primarily use it for?
• How come the surface of the moon can reach temperatures of over 200°C despite it being as close to the Sun as Earth? Why doesn't Earth suffer such extreme temperatures?
• Is there any hard evidence that improper use of antibiotics is the driving force behind the rise of antibiotic resistance?
• Question about brain tumor, in particular Glioblastoma?
• How do plate tectonics affect global warming?
• Why doesn't food and water get mixed during digestion?
• How did species evolve to have immune systems?
• Why do some people get fecal transplants? What conditions make it necessary? What are the effects of getting one?
• What does it actually mean to “die peacefully” in your sleep? Is this even possible?

Im wondering as to why all the Birds ,Insects and Fish were very large back in the mesozoic age compared to what they are now? Posted: 29 Mar 2019 02:14 AM PDT Why are they much smaller today ? submitted by /u/internet5500 [link] [comments]

Do you burn calories by thinking? Posted: 28 Mar 2019 05:45 PM PDT I'm assuming the process of thinking (stimulating neurons) requires some form of energy by our body, so does this mean we burn calories by thinking? submitted by /u/throwawaythememe [link] [comments]

Is it ammonium or ammonia that's part of the nitrogen cycle? Or both? Posted: 29 Mar 2019 04:22 AM PDT I'm trying to understand the nitrogen cycle and there is one thing that keeps confusing me about biological nitrogen fixation, nitrification and ammonification. Some sources talk about ammonium (NH4) and some about ammonia (NH3) when referring to the same thing, and I don't know which to believe, since even the trustworthy ones seem to have contradictory information. Are both involved in different stages of the cycle or how does it work? For example, the following quote from this page (pdf) by RSC: Bacteria that possess the enzyme nitrogenase can convert gaseous nitrogen into ammonia. The bacterium Rhizobium forms a symbiotic relationship with leguminous plants. The bacterium stimulates the growth of root nodules. Here colonies of the bacterium obtain carbohydrate from the host plant. They use this in respiration to release energy and make ATP and reduced NAD to make ammonium ions from nitrogen gas in the soil. First they mention ammonia, then at the end it's suddenly ammonium. How did we get there and what am I missing? submitted by /u/Palaluuseri [link] [comments]

Why are inflammatory drugs like prednisone used when your body is fighting the infection when the drug supposedly suppresses your immune system? Posted: 29 Mar 2019 02:14 AM PDT Thanks Edit: According to Wikipedia, anti inflammatory drugs "do not prevent an infection and also inhibit later reparative processes" I guess to elaborate my point, why do people take them when it supposedly inhibits healing later on? submitted by /u/Feelinggood702 [link] [comments]

Are HE Explosions additive? Posted: 28 Mar 2019 11:12 PM PDT I GM a weekly game of Eclipse Phase, a Tabletop RPG that tries to stick to real science whenever possible. During a fight one of my players pulled the pin on 13 High Explosive Grenades and 9 Frag Grenades and the session ground to a halt as we argued if the resulting explosion radius would be additive or do something else. I know this isn't a game subreddit, but we're curious what would happen in real life. The resulting damage from this blast was 557 points, which is similar to the average damage for another weapon in the game, an Antimatter Grenade which is described as having a blast equivalent to 10 tons of TNT. if that helps submitted by /u/f15k13 [link] [comments]

How do mosquitoes pierce skin? Posted: 28 Mar 2019 02:14 PM PDT If a mosquito lands on me it can pierce my skin but if I take a mosquito and try to pierce myself with its proboscis it is weak and flimsy. How does this work? submitted by /u/end_amd_abuse [link] [comments]

How does a neutron become part of an atom without a positive or negative charge? Could electrons orbit lone neutrons? Does that already happen? Posted: 28 Mar 2019 03:32 PM PDT submitted by /u/Jacob_JBR_Ryan [link] [comments]

In practice, how can enantiomers have different characteristic such as smell or safety (in the case of drugs)? Posted: 29 Mar 2019 03:45 AM PDT I barely understand the concept of chirality, and the idea of a non-superimposable mirror image. How can two compounds with the same molecular formulas, whose are atoms are bonded to each other in the same way have different smells? I kind get the light part, but I am struggling with the other differences in properties. submitted by /u/pumpkingHead [link] [comments]

What causes an aftertaste? Why can it be so different to a food’s regular flavor? Posted: 28 Mar 2019 04:44 AM PDT submitted by /u/Pm_me_fluffy_stuff [link] [comments]

What's the difference between a psychopath and a sociopath? Posted: 28 Mar 2019 01:36 PM PDT I've heard that the condition is the same but the difference is the cause. (Sociopathy is considered to be caused by environment while psychopathy is considered the result of genetics.) I've heard that it's a matter of degree, with a psychopath being a more severe version of a sociopath. I've also heard that they're different names for the exact same thing. What's the consensus in the psychology community? submitted by /u/ExNihiloAdInfinitum [link] [comments]

Why does banging 2 objects together produce sound? e.g. knocking on a door Posted: 28 Mar 2019 09:48 AM PDT I understand at a basic level what sound is. I'm wonder why me rapping my knuckles on a door produces vibrating waves of air so much louder than, say, "knocking" but never actually making contact with the door. What is it about that point of contact that produces a noise? submitted by /u/ShowMeYourTiddles [link] [comments]

How does dark matter interact with sodium iodide? Posted: 28 Mar 2019 01:09 PM PDT I read an article on IFLScience about dark matter detection. In part it said: "The experiments use sodium iodide crystals. When dark matter or regular background particles interact with them, they emit light that is detected by photomultipliers." My understanding has always been that dark matter only interacts with gravity, which is what makes it so hard to detect. How does dark matter interact with sodium iodide? submitted by /u/oswaler [link] [comments]

How do plungers work, and how is it so effective? Posted: 28 Mar 2019 08:39 AM PDT submitted by /u/totes_in_goats [link] [comments]

How is the human brain responsible for 20% of our daily energy consumption? What does it primarily use it for? Posted: 28 Mar 2019 11:46 AM PDT I've had this question for a while and I was curious how our brain allocates its energy consumption. Also does this standard 20% represent an average of all humans? Does this average change if we had a long day of exams (SAT, MCAT, Finals Etc.) ? The reason I ask is because I was going over the concept of Long Term potentiation(LTP). It occurred to me that if the energy the brain uses is primarily for sending and receiving electrical impulses- would that energy requirement permanently increase for individuals who release more neurotransmitters and have more post-synaptic receptors, a.k.a. LPT? After a mentally draining day do we burn a significantly larger amount of calories? It seems crazy to me to think that the brain uses 20% of our daily energy needs since we're not strictly rebuilding it like we do muscles. Would it be accurate to say it's simply completing a number of tasks that require a lot of energy when added together? It would be super interested if anyone at r/didthemath could figure out the average energy requirement for 1 electrical impulse and use that to figure out the amount of energy required for an average person's day-to-day. Would it give us a reasonable comparison? submitted by /u/xPyrez [link] [comments]

How come the surface of the moon can reach temperatures of over 200°C despite it being as close to the Sun as Earth? Why doesn't Earth suffer such extreme temperatures? Posted: 28 Mar 2019 10:47 AM PDT The cold I get because there isn't any atmosphere to trap the heat, but then how does the temperature get so high? submitted by /u/IncredibleBert [link] [comments]

Is there any hard evidence that improper use of antibiotics is the driving force behind the rise of antibiotic resistance? Posted: 28 Mar 2019 08:04 AM PDT I always hear that improper use of antibiotics (e.g., not fully completing a regiment or over prescribing) is causing the rise of antibiotic resistant microbes, but do we have direct evidence of that? I mean, it makes total sense that improper use would cause that, but have we actually seen it in action? It seems to me that antibiotic resistance is inevitable no matter how proper the use, so I'm wondering if improper use is really all that big of a driving factor here. submitted by /u/geniel1 [link] [comments]

Question about brain tumor, in particular Glioblastoma? Posted: 28 Mar 2019 07:11 AM PDT I just came across an article about the treatment of Glioblastoma and was wondering a) why is it that a Glioblastoma is so severe and other braintumors are not, even though they can be huge in size as well and b) what do people suffering from a Glioblastoma actually die of (for example, does the tumor eventually causes a stroke or bleedings in the brain)? I did a bit of googling, but didn't find much; a fellow scientist, who does research in cancer (not brain tumors though) wasn't really sure as well. So I hope anyone here might know. ​ *(Since my question is a bit blunt on Glioblastoma and death, I phrased the title a bit vague and put my actual question in the text.) submitted by /u/The_Sceptic_Lemur [link] [comments]

How do plate tectonics affect global warming? Posted: 28 Mar 2019 09:05 AM PDT submitted by /u/fat_ali [link] [comments]

Why doesn't food and water get mixed during digestion? Posted: 28 Mar 2019 04:32 PM PDT So during digestion, food goes into the stomach and stays there for hours untill it moves into the intestines for more 'Science stuff'. But water goes through the stomach in about 50 seconds. So why don't food and water travel at the same speed. Wouldnt the water just drag the food with it. What if you were drinking a smoothie with blended food? Would digestion still occur at the same speed? How doesnt the body get confused between liquid food and water? submitted by /u/its_RichieRich [link] [comments]

How did species evolve to have immune systems? Posted: 28 Mar 2019 10:06 AM PDT Considering how fast bacteria and viruses are able to reproduce and mutate versus how slow multi-cellular organisms evolve, you would think that these diseases should have eradicated all multi-cellular life way before they even had the chance to develop an immune system. submitted by /u/ricky_marti [link] [comments]

Why do some people get fecal transplants? What conditions make it necessary? What are the effects of getting one? Posted: 28 Mar 2019 12:16 PM PDT Always been curious about how they work and when someone is able to get them. Anyone in the medical field have a clue? submitted by /u/shit-smeared_blade [link] [comments]

What does it actually mean to “die peacefully” in your sleep? Is this even possible? Posted: 28 Mar 2019 09:49 AM PDT I understand this generally means the individual died while unconscious and may not have known what was happening, but does this also mean the body just stopped functioning overnight? Is this even possible, or does some sort of medical issue or trauma have to occur? submitted by /u/The_Asian_Menace [link] [comments]

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