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"AskScience AMA Series: I'm Matthias Hebrok, and my lab has just published a breakthrough in making insulin-producing cells in a dish. My team at UCSF hopes to one day cure type 1 diabetes with transplantable beta cells made from human stem cells. AMA!"
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"Why exactly is HIV transferred more easily through anal intercourse?"
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"Why do mountains have peaks instead of having "flat tops"?"
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"Is it true that you get older quickly if you've been under intense stress for a period of time?"
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"How does radio stations transmit the name of the song currently broadcasted?"
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"Why do tires on cars when doing a burnout give white smoke, but a pile of tires burns black?"
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"When different breeds of cats reproduce indiscriminately, the offspring return to a “base cat” appearance. What does the “base dog” look like?"
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"I heard that detergents, soaps, and surfactants have a polar end and a non-polar end, and are thus able to dissolve grease. But so do fatty acids; the carboxyl end (the acid part) is polar, and the long hydrocarbon tail is non-polar. So why don't fatty acids behave like soap? What's the difference?"
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"Do asteroids fly into the sun?"
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"How do scientists know that 1 Billion crab went missing ?"
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"Why doesn't our brain go haywire when magnetic flux is present around it?"
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"How do cats know automatically how to use a litter box?"
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"Since we measure nuclear warhead yields in terms of tonnes of TNT, would detonating an equivalent amount of TNT actually produce a similar explosion in terms of size, temperature, blast wave etc?"
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"How much bandwidth does the spinal cord have?"
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"Is the original strain of covid-19 still being detected, or has it been subsumed by later variants?"
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"Why is 18 the maximum amount of electrons an atomic shell can hold?"
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"Why do certain flavours go well together? E.g. chicken/coleslaw, tomato/mozarella, spinach/garlic, walnuts/honey, tuna/mayonaise?"
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"If bruises are from bleeding underneath the skin, where does all the blood go when it heals?"
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"Is it possible to 'store' light so it can be used as a form of energy?"
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"Hi, my name is jack, I'm 14 years old, and I love Baseball. I would like to know when a pitcher throws a baseball, how does it curve?"
askscience
"Could I have a bag of neutrons? And if so, what would it look like, would they be reactive?"
askscience
"Could a natural nuclear fission detonation ever occur?"
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"Why doesn't the water of the mediterranean sea mix with the atlantic ocean?"
askscience
"If you were in a completely dark room, and you somehow could see in the dark. Would you be able to see your reflection in a mirror?"
askscience
"If you put a giant mirror on the floor of the earth and make a photo from a satelite, what would you be able to see?"
askscience
"AskScience AMA Series: Experts are warning that measles are becoming a global public health crises. We are a vaccinologist, a pediatrician and a primary care physician. Ask us anything!"
askscience
"I have two questions. How do paleontologists determine what dinosaurs looked like by examining only the bones? Also, how accurate are the scientific illustrations? Are they accurate, or just estimations of what the dinosaurs may have looked like?"
askscience
"If we could use the Large Hadron Collider as a cannon pointed towards space, would the particle make it into orbit?"
askscience
"What causes diarrhea? Specifically why and how is a virus causing the body to expel massive amounts of water?"
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"Is a patch of grass one singular organism? Or is multiple? How can you discern one specific organism of grass from another?"
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"Do people who had already been infected by a virus needs the vaccine to it, if its the same strain?"
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"What’s the difference between men’s and women’s multivitamins?"
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"On Jupiter, will more superstorms the size the Great Red Spot eventually form, or are the positions and types of storms relatively constant?"
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"When and how did scientists figure out there is no land under the ice of the North Pole?"
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"Iron is the element most attracted to magnets, and it's also the first one that dying stars can't fuse to make energy. Are these properties related?"
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"If someone becomes immunized, and you receive their blood, do you then become immunized?"
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"I have recently heard that astronomers have found an "exomoon". I am quite scientifically illiterate so what exactly is an exomoon and how could it affect us on Earth?"
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"Is there any mathematical proof that was at first solved in a very convoluted manner, but nowadays we know of a much simpler and elegant way of presenting the same proof?"
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"Why don't plants get sunburned or genetic damage/cancer being out in the sun all day?"
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"Do dead insects “go bad” for other insects that eat them such as spiders?"
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"Solar panels directly convert sunlight into electricity. Are there technologies to do so with heat more efficiently than steam turbines?"
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"mtDNA is passed down from females to all of their children; shouldn't there be people around who carry denisovan or neanderthal mtDNA because they had a great- great- (etc) grandmother who was denisovan or neanderthal?"
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"Is it likely that dinosaurs walked like modern day pigeons, with a back and forth motion of their head?"
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"What is up with the seahorse? It looks like nature hit the random button during critter creation. Where did it evolve from? what other sea critters is it related to?"
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"How come small cuts on the anus from over wiping or hemorrhoids does not cause serious septicemia?"
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"Do mosquitos hide in predictable locations?"
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"Liquids can't actually be incompressible, right?"
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"Why was the number 299,792,458 chosen as the definiton of a metre instead of a more rounded off number like 300,000,000?"
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"From a cost stand point, would it not make sense to build duplicates of space probes and send them to different locations?"
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"Why do your eyes physically hurt when they adjust to brighter light?"
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"If a pregnant woman is given a vaccine does the unborn child also gain immunity?"
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"Are the nearby airplanes cleared of the sky when launching Falcon Heavy? I was checking Flightradar24 when launch occurred and didn't see any difference. Also, 3 boosters landed back successfully. I assume the sky has to be clear of airplanes to avoid any potential collision?"
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"How can a Black Hole have rotation if the singularity is a 0-dimentional point and doesn't have an axis to rotate around?"
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"Why do current-carrying wires have multiple thin copper wires instead of a single thick copper wire?"
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"What's going on when I'm getting a "kink in my neck" after sleeping in an odd position?"
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"What makes a food 'filling'? Is it just calories?"
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"Why is the gravitational constant, a value that is fundemental to so many fields of science, only know to within 4 significant digits? What about this figure is so intrinsically difficult to measure?"
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"When I hold two fingers together and look through the narrow slit between fingers I am able to see multiple dark bands in the space of the slit. I read once long ago that this demonstrates the wavelength of light. Is there any truth to this? If not, what causes those dark bands?"
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"Is my stomach ever completely empty? And about how much fluid is in there without and food or drink?"
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"What research has there been into blood clots developed from birth control, or why hasn't the problem been solved in the decades since the pill's introduction?"
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"If every digital thing is a bunch of 1s and 0s, approximately how many 1's or 0's are there for storing a text file of 100 words?"
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"If all the polar ice caps melted, would the ocean become less salty?"
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"Do firefighters have to tackle electric car fires differently?"
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"Since batteries are essentially reduction-oxidation reactions, why do most batteries say not to charge them since this is just reversing the reaction? What is preventing you from charging them anyway?"
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"What does a whitening toothpaste contain that is responsible for whitening teeth?"
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"How many tumours/would-be-cancers does the average person suppress/kill in their lifetime?"
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"What organ warms the body? Or just what in general?"
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"What is the theoretical maximum depth of the ocean?"
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"IF sound could travel through space, how loud would The Sun be?"
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"How do scientists make sure that the light they are getting is from that particular heavenly body and not a nearby star, like the Sun?"
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"This is not a 'cicada year,' but I hear one buzzing outside right now. Is there a small set of cicadas out of sync with the main population, or do a few mistakenly mature early every year? Or is this a different species entirely?"
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"Why is green always used in special effects like green screens? Why not yellow or purple or red?"
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"AskScience AMA Series: We're experts working on the James Webb Space Telescope, the most powerful observatory ever built. It's ready to launch. Ask us anything!"
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"How exactly do contagious disease's pandemics end?"
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"Do women with big boobs have more estrogen?"
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"What happens to water when it freezes and can't expand?"
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"If diamonds are the hardest material on Earth, why are they possible to break in a hydraulic press?"
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"If all forms of elephant went extinct before we came to be, and all we had were fossils, could we figure out that they had long trunks?"
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"Why does a hair come back if I pull it out by the root? What's causing my body to say, "Oh, I remember there used to be a hair there, better regrow one.""
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"AskScience AMA: I’m Professor Brian Hare, a pioneer of canine cognition research, here to discuss the inner workings of a dog’s brain, including how they see the world and the cognitive skills that influence your dog's personality and behavior. AMA!"
askscience
"When you "feel" the sun beating down on you, is that some part of your body reacting to radiation rather than the normal sense of warmth carried via conduction or convection?"
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"I've heard that one of the purposes of the "fresh cut grass" smell is a type of distress signal that warns nearby plants to start moving nutrients to the roots before they get cut down. Is there any truth to this?"
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"If defibrillators have a very specific purpose, why do most buildings have one?"
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"If I'm in a car goong 25mph with 25mph sustained tailwinds, and i roll down the window, will i feel any breeze?"
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"Can someone who has photosensitive seizures have a seizure by blinking really fast?"
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"How do some air-freshening sprays "capture and eliminate" or "neutralize" odor molecules? Is this claim based in anything?"
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"If you were to fall into a black hole, just as anyone watching would see your time slow down until you stop forever on the event horizon, would you in turn see the entire future of the universe pan out in front of you? If not, why does the mathematics not allow this reversal of perspective?"
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"What is the Infection Fatality Rate from COVID 19 if you are fully vaccinated?"
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"If we observe a star X light years away, does that mean theres nothing inbetween here and there obstructing our view?"
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"What would be the ecological implications of a complete mosquito eradication?"
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"How was the first parachute tested?"
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"How do we know how to build large scale, but rare, civil engineering projects? (e.g. subways)"
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"From the interior of the International Space Station, would you be aware you are in constant motion? Are things relatively static or do they shudder and shake like a train cabin might?"
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"You can’t dig a tunnel trough earth, but can you dig a tunnel trough mars?"
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"High-intensity ultrasound is being used to destroy tumors rather deep in the brain. How is this possible without damaging the tissue above?"
askscience
"If e=mc^2, does that mean that the sun is constantly losing mass through radiated energy?"
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"Is it possible to be colorblind in only one eye?"
askscience
"How do magnets get their magnetic fields? How do electrons get their electric fields? How do these even get their force fields in the first place?"
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"A month ago we made available publicly via the CERN Open Data Portal 300 TB of research data from the CMS Experiment at CERN’s Large Hadron Collider. AUA about our open data!"
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"Water is clear. Why is snow white?"
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