Do sharks growl?

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• Do sharks growl?
• Why do we think certain things/animals are ‘cute’? Is this evolutionarily beneficial or is it socially-learned?
• Can global warming and the next ice age cancel out?
• Does electrical force cause some kind of distortion?
• Could Leech Therapy be used to cure Herpes?
• What factors primarily determine if a shoreline is rocky or sandy?
• How does squinting improve clarity of sight?
• How does recondensation of liquid (during cavitation) produce shockwave?
• When your body is a fighting a virus, is it fighting it in one place or all over your body?
• How do we know what the insides of planets including earth look like?
• How do they determine the Nutrition values of products?

Do sharks growl? Posted: 18 May 2019 05:53 PM PDT If not, do they vocalize or communicate in other ways? If so, what circumstances elicit growls, and do they vary across different situations? submitted by /u/mmm_toasty [link] [comments]

Why do we think certain things/animals are ‘cute’? Is this evolutionarily beneficial or is it socially-learned? Posted: 19 May 2019 04:36 AM PDT Why do I look at cats and dogs and little baby creatures and get overwhelmed with this weird emotion where all I can do is think about how adorable they are? To me it seems useless in a survival context. submitted by /u/BrokenEffect [link] [comments]

Can global warming and the next ice age cancel out? Posted: 19 May 2019 05:13 AM PDT In the Book „the Science of discworld " the author wrote „it would be ironic if our global warming crisis would prevent the next ice age". Now to the question. How realistic is this? Are we overdue in the ice age cycle and even if so, are their reliable scientific sources on this scenario? On a side note: feel free to comment on this scenario. P.S.: please say it can cancel out so I can have faith in our future :) submitted by /u/CompactOwl [link] [comments]

Does electrical force cause some kind of distortion? Posted: 18 May 2019 06:54 PM PDT I don't really understand the concept of gravity being a space distortion instead of being a real force. So it makes me a little confused when I'm studying (highschool's level) electrical force. It seems soo close to gravity by it's formulas, so... Is it a distortion of something too? What are the similarities and differences, and why they seem similar? submitted by /u/_spary_ [link] [comments]

Could Leech Therapy be used to cure Herpes? Posted: 19 May 2019 01:05 AM PDT I was wondering if leech therapy could be used as a cure for herpes but I don't know enough about herpes or leech therapy. My theory is when a person is having an outbreak the virus leaves the spine and arises to the area that the person got infected from. From there the person would get the blisters that herpes is known for. So if you were to apply the leeches right before the outbreak the leeches would eat/drink the blood with the virus with it. With multiple treatments the person would be free of the virus. A couple of problems I have spotted in this theory is that I don't know if herpes reproduces while dormant in the spine and if it does how quickly? If leeches actually drink/eat the blood or just filter it? I've tried to do research on both but didn't find any answers. Any input would be greatly appreciated. submitted by /u/justanotherperson159 [link] [comments]

What factors primarily determine if a shoreline is rocky or sandy? Posted: 18 May 2019 10:59 AM PDT submitted by /u/Thormundr [link] [comments]

How does squinting improve clarity of sight? Posted: 18 May 2019 09:52 AM PDT submitted by /u/QueenLaniakea [link] [comments]

How does recondensation of liquid (during cavitation) produce shockwave? Posted: 18 May 2019 08:41 AM PDT Basic process of cavitation goes like this: lower pressure reduces saturation temperature of liquid, thereby vaporizing liquid After sometime, local pressure normalizes to surrounding pressure, thereby recondensating liquid submitted by /u/divineflare1411 [link] [comments]

When your body is a fighting a virus, is it fighting it in one place or all over your body? Posted: 18 May 2019 07:24 AM PDT Are battle lines drawn? Or is it total war, with guerrilla warfare? Or is a battle metaphor unsuitable? submitted by /u/JackRadikov [link] [comments]

How do we know what the insides of planets including earth look like? Posted: 18 May 2019 03:12 AM PDT submitted by /u/ItsTwanks [link] [comments]

How do they determine the Nutrition values of products? Posted: 18 May 2019 05:26 AM PDT Is it purely based on the number of units made from the mass ingredients they use to make that batch? Are individual units tested after they are produced to determine it? Does it have a margin of variance/error? Is every unit truly going to be the same? submitted by /u/R0ot2U [link] [comments]

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What does quantum field theory tell us that quantum mechanics doesn’t?

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• What does quantum field theory tell us that quantum mechanics doesn’t?
• Are galaxies more likely to spiral a certain direction?
• How do planes detect heat seeking / guided missiles?
• Does the humany body crave food that contains specific nutrients it is running low on or are cravings pouring based on pleasure?
• What happened to the hypothesized Ninth Planet that everyone was talking about years ago?
• How does Anti-Gravity fountain lamp works?
• What causes a “brain freeze” when eating ice cream or drinking something cold fast?
• Do humans instantly die when the heart stops?
• can any solids melt in a vacuum?
• When birds take off as a group (i.e to migrate) who initiates the take off? Is there a bird 'leader' who everyone follows? Or do they just have the same sense as to when to take off
• Does the Earth ever gain or lose water?
• Why do some diabetics lose their legs and how is it related to diabetes?
• What do the other 3% of peer reviewed studies on Climate change say?
• Would moving through space quickly enough at sublight speeds eventually cause the cosmic microwave background to blue-shift to the point of being hazardous, such as X-Rays and Gamma?
• How do we know what kind of atoms make up a particular molecule?
• Does the Pineal Gland release DMT? Is DMT released in a large quantity upon death?
• Are there any animals that require (to survive) an uncommon element such as lead or uranium?
• Is there a way to identify the Rate Determining Step in a mechanism?
• How does Platelet-Rich Fibrin cause increased healing if its just our own blood?
• How does leukemia spread around the bone marrow?

What does quantum field theory tell us that quantum mechanics doesn’t? Posted: 18 May 2019 03:38 AM PDT submitted by /u/foramsgalorams [link] [comments]

Are galaxies more likely to spiral a certain direction? Posted: 17 May 2019 05:01 PM PDT Are galaxies more likely to spiral clockwise or anticlockwise, or is it more just a mix of both? submitted by /u/ValjetaDawn [link] [comments]

How do planes detect heat seeking / guided missiles? Posted: 18 May 2019 07:03 AM PDT And how do flares throw the missiles off? submitted by /u/Sporecrafters [link] [comments]

Does the humany body crave food that contains specific nutrients it is running low on or are cravings pouring based on pleasure? Posted: 17 May 2019 08:06 AM PDT Edit: purely* not "pouring" submitted by /u/hibdob [link] [comments]

What happened to the hypothesized Ninth Planet that everyone was talking about years ago? Posted: 17 May 2019 03:07 PM PDT A couple of years ago scientists hypothesized there was a ninth planet, but lately I haven't heard anything about it. submitted by /u/50-Shades-Of-Aidz [link] [comments]

How does Anti-Gravity fountain lamp works? Posted: 18 May 2019 05:04 AM PDT submitted by /u/madzzey [link] [comments]

What causes a “brain freeze” when eating ice cream or drinking something cold fast? Posted: 17 May 2019 06:41 PM PDT submitted by /u/RaymondGrizzly [link] [comments]

Do humans instantly die when the heart stops? Posted: 17 May 2019 02:37 PM PDT As someone who is not expert in biology but has a know-how in mechanics (totally unrelated, I know) I find it strange that in movies, when someone's heart stops they instantly collapse like a ragdoll. Why? Only the "fuel" line got severed, not the nerves. The muscles have internal oxygen reserves as well. They say that if you can restart a heart within 5 minutes, the brain does not suffer damage. So why can't we move for 5 minutes after the heart stops? submitted by /u/TheWipyk [link] [comments]

can any solids melt in a vacuum? Posted: 17 May 2019 03:36 PM PDT (Specifically an ultra hard vacuum like in interstellar space.) I've seen answers to the related question, "Can any liquids *exist* in a vacuum?", to which the answer seems to be "From a practical standpoint, yes, from a technical standpoint no." All liquids have some finite vapor pressure, so in a perfect vacuum they won't technically be stable and will continue evaporating, but if their vapor pressure is low enough then this will happen very slowly, and they can remain liquid for timescales of years or more. Apparently some 'ionic liquids' are quite good for this, with vapor pressures so small they often can't be measured. My question, however, is about the phase change itself. Could you start with a frozen solid sample of a low vapor pressure liquid, and then heat it up in a vacuum until it melts into a liquid? Or in that case would it go directly from solid to liquid? submitted by /u/timelesssmidgen [link] [comments]

When birds take off as a group (i.e to migrate) who initiates the take off? Is there a bird 'leader' who everyone follows? Or do they just have the same sense as to when to take off Posted: 17 May 2019 08:04 AM PDT submitted by /u/Communist_Tuna [link] [comments]

Does the Earth ever gain or lose water? Posted: 17 May 2019 02:41 PM PDT We learn in elementary school that water evaporates, makes clouds and falls back to the Earth in a constant cycle. On a global scale does the earth ever really gain or lose water in any measurable way? If so, how? submitted by /u/bryanBr [link] [comments]

Why do some diabetics lose their legs and how is it related to diabetes? Posted: 17 May 2019 08:38 AM PDT submitted by /u/xX-CoochieItcher-Xx [link] [comments]

What do the other 3% of peer reviewed studies on Climate change say? Posted: 17 May 2019 07:37 AM PDT I'm familiar with the stat that 97% of peer reviewed studies say humans contribute to climate change. What do the other 3% say? Is there anything to them? ​ Always thought it would be valuable to read the other side, but I honestly can't track down the studies submitted by /u/asdoijqwoeij129 [link] [comments]

Would moving through space quickly enough at sublight speeds eventually cause the cosmic microwave background to blue-shift to the point of being hazardous, such as X-Rays and Gamma? Posted: 17 May 2019 02:32 PM PDT submitted by /u/milkdrinker7 [link] [comments]

How do we know what kind of atoms make up a particular molecule? Posted: 17 May 2019 09:33 AM PDT For example, how do scientists know that glucose is 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms? What methods are used and how do they go about analyzing the structure of a molecule? submitted by /u/TweezyBaby [link] [comments]

Does the Pineal Gland release DMT? Is DMT released in a large quantity upon death? Posted: 17 May 2019 06:46 AM PDT submitted by /u/Dragon111365 [link] [comments]

Are there any animals that require (to survive) an uncommon element such as lead or uranium? Posted: 17 May 2019 07:17 AM PDT submitted by /u/lewicki [link] [comments]

Is there a way to identify the Rate Determining Step in a mechanism? Posted: 17 May 2019 04:51 PM PDT Can one pinpoint which step is rate determining without any specific information besides the steps themselves? If so, how is this done? submitted by /u/csbhullar5 [link] [comments]

How does Platelet-Rich Fibrin cause increased healing if its just our own blood? Posted: 17 May 2019 07:56 AM PDT submitted by /u/Karthear [link] [comments]

How does leukemia spread around the bone marrow? Posted: 17 May 2019 10:23 AM PDT Let's take acute myeloid leukemia as an example. After certain mutations AML might develop in the bone marrow. For diagnosis, a sample from the bone marrow is obtained by aspiration and getting a biopsy. If Im not wrong, the usual site for puntcure is the iliac crest. ​ Now for my question: If the AML can develop anywhere in the bone marrow, why are always the same sites being used for extraction? Is it possible to miss the cancer, if it didn't develop at the puncture site? If no, how do the immature cells spread around the rest of the marrow? ​ Thanks in advance submitted by /u/cyanide_hollow [link] [comments]

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In 2024 if NASA do get to and land on the moon, will novice photographers or people with telescopes be able to see any of the mission?

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• In 2024 if NASA do get to and land on the moon, will novice photographers or people with telescopes be able to see any of the mission?
• How long would the communication delay be from Mars to Earth?
• Why is current the same everywhere in a circuit with series combination of resistances?
• I would have thought that by now the optimum spout-shape (as on jug or kettle) is longsince known - that is, 'optimum' in terms of water falling cleanly from the spout & not dribbling back along the underside of it: so does anyone know whether such an optimum spout exists?
• Do other animals experience the same kind of mental faculty decline as we do when they age?
• In terms of efficiency of cooling a liquid, is it better to blow cold air over it or suck hot air away from it?
• Could a planet exist indefinitely?
• How is the Monte Carlo method different from p hacking?
• What do hospitals do with amputated limbs?
• Do intelligent species' brains share distinctive traits? For example, do all intelligent animals have big prefrontal cortex's?
• How are calories calculated?
• What causes the darker and lighter portions of the moon that you can see when you look up at it?
• How does pencil lead stick to the paper?
• Does the size of a frog have any correlation to the loudness/deepness of its croak? (Either within one species or for frogs in general.)
• When did the last Ice Age end?
• When a star starts producing iron in its core, does it go supernova shortly afterwards, or is it a long process that takes months or years?
• How did people avoid getting sunburned before modern sunscreen?
• Data type values same as quartz crystal frequency?
• What causes dielectric screening to occur?
• How does everyday radiation exposure affect your average life span?
• Do birds being killed by wind turbines count as a form of compensatory predation?
• Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane. How common is this axial tilt on other planets and can we assume a planet needs to have seasons in order to support life?

In 2024 if NASA do get to and land on the moon, will novice photographers or people with telescopes be able to see any of the mission? Posted: 16 May 2019 10:49 PM PDT Will average people be sharing images of the spacecraft orbiting the moon or it landing? Or do regular enthusiasts not have strong enough equipment too see in that detail? submitted by /u/Chamer911 [link] [comments]

How long would the communication delay be from Mars to Earth? Posted: 17 May 2019 12:07 AM PDT How long would the delay in communications be through audio and video from a person on Mars to a person on Earth? submitted by /u/WarmFire [link] [comments]

Why is current the same everywhere in a circuit with series combination of resistances? Posted: 17 May 2019 04:05 AM PDT Why is current the same everywhere in a circuit with series combination of resistances? Shouldn't the current slow down due to the resistors? I need help in this topic. (I am new to Electricity) submitted by /u/nickbiscuit22 [link] [comments]

I would have thought that by now the optimum spout-shape (as on jug or kettle) is longsince known - that is, 'optimum' in terms of water falling cleanly from the spout & not dribbling back along the underside of it: so does anyone know whether such an optimum spout exists? Posted: 17 May 2019 06:46 AM PDT And if so, then why it's not so that absolutely all spouts are made that shape. I don't think such a spout-shape could be calculated ... so I'm not asking for a mathematical equation for the curve of it (unless it be a parametrised empirical one). Also such a shape, if it does exist, has possibly been known for two or three millenia ... or yet longer, maybe! Actually - it's just occured to me now that each individual material might have its optimum shape, according as the affinity of water for substance varies from one substance to the next. submitted by /u/Ardhanarishwara [link] [comments]

Do other animals experience the same kind of mental faculty decline as we do when they age? Posted: 16 May 2019 06:11 PM PDT We experience some decline when we age, do other animals do?? If they do, how does that manifest? submitted by /u/GorgeousinGA [link] [comments]

In terms of efficiency of cooling a liquid, is it better to blow cold air over it or suck hot air away from it? Posted: 17 May 2019 06:31 AM PDT submitted by /u/dmnerd [link] [comments]

Could a planet exist indefinitely? Posted: 16 May 2019 10:28 PM PDT To my understanding, in a few billion years or so, the dying sun of our solar system will expand and destroy Earth. But hypothetically, if the sun were somehow kept in its current stable state forever, would the Earth still naturally decay or otherwise cease to exist as a planet over time? Or would it theoretically be able to keep existing until actively destroyed by an outside force? submitted by /u/CatComixzStudios [link] [comments]

How is the Monte Carlo method different from p hacking? Posted: 17 May 2019 12:19 AM PDT Looking up their definitions on Wikipedia: ​ Monte Carlo methods, or Monte Carlo experiments, are a broad class of computational algorithms that rely on repeated random sampling to obtain numerical results. The underlying concept is to use randomness to solve problems that might be deterministic in principle. ​ as opposed to: ​ Data dredging (also data fishing, data snooping, data butchery, and p-hacking) is the misuse of data analysis to find patterns in data that can be presented as statistically significantwhen in fact there is no real underlying effect. This is done by performing many statistical testson the data and only paying attention to those that come back with significant results, instead of stating a single hypothesis about an underlying effect before the analysis and then conducting a single test for it. ​ Intuitively, these seem very similar to me, and looking through their definitions in detail, I can't convince myself that they are different. Could someone please help me see how they are different? submitted by /u/toafobark [link] [comments]

What do hospitals do with amputated limbs? Posted: 16 May 2019 09:35 PM PDT submitted by /u/TBGragas [link] [comments]

Do intelligent species' brains share distinctive traits? For example, do all intelligent animals have big prefrontal cortex's? Posted: 16 May 2019 01:18 PM PDT submitted by /u/Reliable_Narrator [link] [comments]

How are calories calculated? Posted: 16 May 2019 10:20 PM PDT I know that a calorie is how much energy is needed to raise the temperature of water by one degree, but how does a company or scientist calculate the calories in food? How are those calories converted into heat? submitted by /u/Wheat___thin [link] [comments]

What causes the darker and lighter portions of the moon that you can see when you look up at it? Posted: 16 May 2019 01:30 PM PDT submitted by /u/Big_Lliam [link] [comments]

How does pencil lead stick to the paper? Posted: 16 May 2019 09:25 AM PDT Might seem like a dumb question, but I know that the lead is just graphite that's rub off in a thin layer onto the paper. How come it doesn't just fall of the paper when you pick it up? submitted by /u/Shuau_21 [link] [comments]

Does the size of a frog have any correlation to the loudness/deepness of its croak? (Either within one species or for frogs in general.) Posted: 16 May 2019 12:55 PM PDT submitted by /u/Saelyre [link] [comments]

When did the last Ice Age end? Posted: 16 May 2019 02:27 PM PDT submitted by /u/Onething123456 [link] [comments]

When a star starts producing iron in its core, does it go supernova shortly afterwards, or is it a long process that takes months or years? Posted: 16 May 2019 12:50 PM PDT submitted by /u/GLDS1997 [link] [comments]

How did people avoid getting sunburned before modern sunscreen? Posted: 16 May 2019 02:10 PM PDT submitted by /u/TheManIntheWhiteHat [link] [comments]

Data type values same as quartz crystal frequency? Posted: 16 May 2019 01:03 PM PDT So I was studying for a microcontrollers test (that's a subject in our school) and one thing we had to memorize are some data type values. I noticed that the range for an integer is from -32768 to 32767. The quartz crystal frequency is 32768 Hz, and that is 1 second. That has to have an explanation. I asked my teacher but he has no idea. Is it possible that the int value range is dependent on the crystal frequency because of the crystal oscillator inside of electronics? Or something similar? submitted by /u/SirIzzy1 [link] [comments]

What causes dielectric screening to occur? Posted: 16 May 2019 09:24 AM PDT I've seen explanations that [make some sense]((http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dielec.html), but I am still somewhat confused about why this happens in general. ​ I'm considering a single positive charge in a dielectric medium. Here's sketch of the effect I'm confused about (P is positive charge, - is small negative from the dipole, + is small positive, r is point of reference where the potential is measured): P r P - + r In this sketch it looks as if the dielectric effect is magnifying the potential since we've now made a positive charge closer to the point of reference by aligning the dipole with the original positive charge. ​ As a follow up: would dielectric screening happen in two/one dimension(s)? submitted by /u/throwaway159357n [link] [comments]

How does everyday radiation exposure affect your average life span? Posted: 16 May 2019 11:51 AM PDT Does exposure to radiation for example increase mutation chance and thus chance of cancer? If I do that one more Panoramic radiograph, do I die on average 1 month earlier because my cancer chance just got increased? submitted by /u/auesthesthicc [link] [comments]

Do birds being killed by wind turbines count as a form of compensatory predation? Posted: 16 May 2019 02:38 PM PDT I'm not qualified on whether wind power kills birds, or if it's a problem, I'm just wondering about this. I once attended a talk about compensatory predation and the speaker gave the example of road kill. Was he right? Do wind turbine kills amount to the same thing? submitted by /u/awbx58 [link] [comments]

Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane. How common is this axial tilt on other planets and can we assume a planet needs to have seasons in order to support life? Posted: 16 May 2019 10:09 AM PDT What if the Earth's axial tilt was 40 degrees? 60? etc submitted by /u/the_ju66ernaut [link] [comments]

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