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Tuesday, December 21, 2021

What scale of nuclear warfare would it take to actually result in global nuclear fallout?

What scale of nuclear warfare would it take to actually result in global nuclear fallout?

What scale of nuclear warfare would it take to actually result in global nuclear fallout?

Posted: 21 Dec 2021 10:08 AM PST

Flair may not be perfect, I went with physics because nuclear fission & fusion are collectively referred to as "nuclear physics".

There have been at least 2000 nuclear test explosions worldwide to date, spread throughout the northern hemisphere across many longitudes. The perception of the consequences of nuclear warfare seems to be (from an anecdotal perspective) that the sheer volume of weapons detonated in a total war scenario would result in a global nuclear fallout, or "nuclear winter" (whatever that means).

Is that perception incorrect? Would a theoretical nuclear war simply render major population centers uninhabitable while leaving the rest of the world unscarred? Are the effects of nuclear detonations more apparent when performed during a short period, and if so, were there any noticeable effects during and after 1962, when ~140 tests took place in a single year? How many detonations would have to take place between the nuclear powers for the effects to be felt in, say, rural Argentina?

submitted by /u/roosterkun
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Do moons of gas giants significantly affect the magnetic field of that planet?

Posted: 21 Dec 2021 10:09 AM PST

A magnetic field of a exoplanet was recently discovered for the first time. Could perturbations in a gas giants magnetic field be a potential method for discovering exomoons?

submitted by /u/A_Vandalay
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To how small a part of Africa can we narrow down the evolution of modern humans?

Posted: 21 Dec 2021 09:42 AM PST

Considering the Out-of-Africa model, do we believe that Homo Sapiens evolved out of Homo Erectus over the African continent as a whole, or did we 'become' modern humans in a smaller region (say for example Morocco, where the oldest Sapiens fossil so far was found) and then spread over Africa?

submitted by /u/The_Fredrik
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Is it possible for a planet to have only ONE polar ice cap?

Posted: 21 Dec 2021 11:14 AM PST

Does it depend on how far the planet is from the star & the planet's tilt on the axis & other factors? Or is it only possible for the planet to have two ice caps? I'm doing this for worldbuilding, & the ice cap is at the southern part of the planet.

submitted by /u/heyits_phoenixX-G
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When does laminar flow become turbulent?

Posted: 21 Dec 2021 07:09 AM PST

I want to know about laminar flow, specifically about the effects of when the flow accelerates.

If I were to take a 500 ft tube which was vertically placed, transparent, and air tight then aim a laminar flow directly down into it, where and when would the turbulence start? Or maybe it would never become turbulent?

With water though, I would think that eventually as the water flows down and increasingly narrows, the force from water pressure would collapse the water into droplets, but where and when?

Have similar experiments already been done? Do we have a good way of predicting this?

submitted by /u/redhead606
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Are all trees with the same leaf arrangement - alternate, opposite, pinnately compound, etc. - more closely related?

Posted: 21 Dec 2021 09:16 AM PST

Is it a case of concurrent evolution or are, say, walnuts and ash trees (both pinnately compound, drastically different fruits) closer phylogenetically than oak and maple (alternate and opposite respectively)?

submitted by /u/RIPEOTCDXVI
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Why is the Arctic warming significantly faster than the global average?

Posted: 21 Dec 2021 10:25 AM PST

Multiple studies and reports have shown that the Arctic is warming much faster than the rest of the planet. Why is this occurring?

submitted by /u/felixdixon
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I saw that the US goverment classifes an area as "substanial covid risk" if the number of cases are 50+ per 100k people which is at least 0.05% of the population. How do scientists identify risk levels for viruses?

Posted: 21 Dec 2021 10:00 AM PST

Is there data yet that shows the effects of omicron in the vaccinated vs the unvaccinated?

Posted: 21 Dec 2021 09:25 AM PST

What are the limitations on the interactions between human neurons and electronic connections for prosthesis?

Posted: 21 Dec 2021 07:41 AM PST

So, I was asking around in some websites why we don't see many kind of circuits connected to human neurons, and, besides not receiving a lot of replies, a few people said that "the neurons connected to electronics eventually die out, making it unfeasible".

For context, I was asking because I saw this video of a scientist using rat neurons to control a robot:

"Robot controlled by Neurons":
https://youtu.be/NZihD9QGqMs

And this one, about prosthesis controlled mentally:

"The Robot-Arm Prosthetic Controlled by Thought":
https://youtu.be/sk1NkWl\_W2Y

I couldn't find much information about it, but it is true that the neurons die out or are killed by the circuits directly connected to them?

submitted by /u/mandiokai
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How does erosion work in the oceans?

Posted: 21 Dec 2021 08:36 AM PST

Im not sure if erosion is the term that applies, but if not I imagine there has to be a similar force at work.

submitted by /u/Giatoxiclok
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Why can we only measure one component of electron spin at a time?

Posted: 21 Dec 2021 10:53 AM PST

Why can we not measure the x/y/z component in a single detector? Is it theoretically impossible or practically not possible?

submitted by /u/bass1012dash
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If the Grand Canyon River was blocked/dammed would it fill up over time?

Posted: 20 Dec 2021 08:44 PM PST

If at some point along the Grand Canyon a catastrophic landslide or dam was built, would it fill up behind the blockage until it overflowed?

Due to the unique nature of the deep Canyon the water has no way to divert like flooding upriver. But for miles but has a vast basin that it could fill overtime, is this possible?

submitted by /u/InspectorAvenue
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Can planets orbit twin star systems?

Can planets orbit twin star systems?

Can planets orbit twin star systems?

Posted: 21 Dec 2021 05:21 AM PST

Is there any development on higher energy density liquid fuels?

Posted: 21 Dec 2021 05:36 AM PST

So it seems like the energy density of fossils fuels have more or less completely hit a brickwall. Is there any developments on any new fuel that has higher energy density then the traditional RP1 and jet fuel?

submitted by /u/saaltydoorknoerbs
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What produces the bad smell in meat that has gone bad?

Posted: 20 Dec 2021 07:11 PM PST

I have found no answer to this online. When meat goes bad and it starts to smell like sulfur, what is the meat releasing that smells like that?

submitted by /u/Dannn24
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What is the closest to the alpha-centauri system?

Posted: 20 Dec 2021 04:43 PM PST

I know that the alpha-centauri system is the closest to the Earth-Sun system, but that doesn't mean we are the closest to it. What is the closest star to alpha-centauri that is not us?

submitted by /u/Splatter_bomb
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If salicylic acid is keratolytic, why doesn't it weaken or dissolve your hair, which is made of keratin?

Posted: 21 Dec 2021 05:44 AM PST

I know that salicylic acid can help keep your skin clear by breaking down dead skin cells, but why doesn't it break down our hair? Hair is made of keratin and is dead. I was looking into hey salicylic acid shampoo and started to wonder this. The only answers I can find online are a bunch of general information medical pages repeating the same information. I can't find any information out there about the actual mode of action on skin or hair.

Really not sure if this is chemistry or human body, but I put it under chemistry because I think it's more about the chemical reaction.

submitted by /u/raineywhether
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Does absence of tonsils / adenoids affect PCR and LF tests?

Posted: 21 Dec 2021 07:11 AM PST

Can prions spread by the meat of an infected animal?

Posted: 20 Dec 2021 09:07 PM PST

Where on earth have humans been living the longest continually?

Posted: 21 Dec 2021 06:25 AM PST

Listening to a podcast about ancient Assyria got me thinking: What is the place on earth where humans have been settled the longest continuously?

You always hear about the Fertile Crescent being the location of the earliest civilizations, and people still live there, but what about South America or Africa? Are any of the earliest cave dwellings still in use or incorporated into modern settlements?

Are there any cities or single sites that have been lived in and built up for, say, 4,000 years? 3,000? Even if the civilization that lived there changed over time. As I type this I'm thinking maybe Jerusalem, but perhaps there are even older places I'm unaware of.

submitted by /u/PooveyFarmsRacer
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Why does metal taste like it does?

Posted: 20 Dec 2021 03:28 PM PST

For example blood has this characteristic metallic taste due to the high iron content: in what way are our taste buds stimulated by metal that is so unique as a taste?l

submitted by /u/nickoskal024
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Why doesn't the roche limit have an effect on objects like the ISS or people when we orbit the Earth or Moon?

Posted: 20 Dec 2021 03:05 PM PST

This may not be the most accurate way to describe it, but I have been told that objects get ripped apart by the roche limit because they get too close to another object and the gravity from the bigger object rips them apart because their mass doesn't have enough gravity to hold itself together. Given we are much smaller and have way less gravity, why don't we get ripped apart in orbit?

submitted by /u/AgentFN2187
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how does anti parasitic drugs work?

Posted: 20 Dec 2021 04:52 PM PST

couldn't find an answer on how the mechanism of antiparasitic drugs work in google. I am quite curious since a lot of anti parasitic plants and drug are involve in cancer treatment alternative.

submitted by /u/Cavernjuice
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Do electrons slow down in a bose-einstein condensate or generally at these ultra low temperatures?

Posted: 20 Dec 2021 03:26 PM PST

Is the flu shot tested every year?

Posted: 20 Dec 2021 12:53 PM PST

I know that every year the strains of flu included in the flu vaccine change. Does this mean that the flu vaccine has to go through new clinical trials every year?

If so, how do they select the strains and get it trialed fast enough to roll it out? It seems that would take too long and by the time the vaccine is tested a different strain would be circulating.

submitted by /u/Ant_Zestyclose
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How similar does a vaccine have to be to a disease for the vaccine to work?

Posted: 21 Dec 2021 06:07 AM PST

I have read in a couple different places that the first vaccine was for smallpox. People were deliberately infected with cowpox to prevent smallpox. How can one disease give someone immunity to a completely different disease, and how similar do the diseases have to be for this to work?

submitted by /u/KittyinaShoe
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Is there such a thing as a cholesterol processing disorder? Where cholesterol is created and floats around the body without being properly used?

Posted: 20 Dec 2021 12:40 PM PST

Let me start with, I apologize for my grammar, I've always been one for run on sentences, and terrible writing skills like that

Ok, I've had a randomish idea and I would like someone that knows way more than me about these things tell me I'm right or a complete moron, or any combination of the two

I have ADHD, medicated with Adderall

I have high cholesterol, high enough to have cholesterol deposits by my eyes

My levels of vitamin D always come up low, even though I spend 5 days a week outdoors from basically sun up to sun down, take a 2000 unit supplement specifically for vitamin D, and ingest a fair amount of vitamin D fortified milk on a regular basis

I also have sexual side effects, that is attributed to the Lexapro but seems pertinent for this either way, to where I can get it up, just not finish and my sex drive is all over the place

Ok, given all of that, and how cholesterol is used on the body to make testosterone and estrogen, as well as vitamin D, and (if I was reading that study that I came across that I didn't know the lingo so may actually be completely off) have some Important use in the movement of dopamine in the brain, is it plausible that there is something malfunctioning in the areas that process cholesterol into these things, therefore they aren't working properly, and the cholesterol in my system is free floating because it's not in use?

submitted by /u/PoxTheDragonborn
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Do subsequent reinfections of the same disease increase the baseline number of antibodies that remain in your body?

Posted: 20 Dec 2021 02:09 PM PST

If I remember what I learned in high school biology correctly, when you are infected with a disease your body manufactures antibodies, and after the infection has passed the antibody count starts to decrease but never reaches zero, instead decreasing to some baseline asymptote.

Does getting infected again increase that baseline, or is a single infection equivalent to being infected many times?

submitted by /u/champloo11
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Monday, December 20, 2021

Can other people's phones "hear" LTE traffic that's addressed to your phone? If data is broadcasting from a cell tower, then how does your phone differentiate your traffic from other people's traffic?

Can other people's phones "hear" LTE traffic that's addressed to your phone? If data is broadcasting from a cell tower, then how does your phone differentiate your traffic from other people's traffic?

Can other people's phones "hear" LTE traffic that's addressed to your phone? If data is broadcasting from a cell tower, then how does your phone differentiate your traffic from other people's traffic?

Posted: 20 Dec 2021 06:07 AM PST

Would it be possible and make sense to combine a COVID vaccine booster with a flu shot in a single, annual dose?

Posted: 19 Dec 2021 11:29 AM PST

do viruses from 30 years ago exist? for example flu strains, or the first variant of covid?

Posted: 20 Dec 2021 07:08 AM PST

Does the first variant of covid still exist?

I ask because no one seems to be tested for it in my country anymore.

Secondly, do viruses from 100 years ago still exist?

Did they disappear naturally?

submitted by /u/uttftytfuyt
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We know about colour blindness, where certain colours cannot be seen properly and get compensated for by the other cones in the eye. Is there a similar condition for taste buds where people will experience vastly different flavours from a 'taste-normal' person?

Posted: 20 Dec 2021 07:45 AM PST

How did omicron get *50*mutations? Would this happen in one host or would 1 or 2 mutations happen in one person and that transmitted just a bit better than delta?

Posted: 19 Dec 2021 06:13 AM PST

In other words….you've got the delta variant, which I assume is the variant omicron has fifty different mutations from? (Or is it 50 compared to the original?)

Anyhow, person A has Delta. Does delta gain 50 mutations in person A, and so it transmits more and got to person B? Or does it develop 1-2 mutations reproducing in A, and go to B and mutate a few ways, then C?

How many mutations can occur in an individual host?

And, how many mutations would omicron need to become another variant that's being tracked by authorities as a new thing? I'd assume just one if that one meant it travelled more successfully than omicron?

Finally, let's say we think of It like vehicles. Is this more like the Ford E350 where it can a bus or fire truck or ambulance or FedEx depending on what back you put on, but the core truck is the same? Or is more like a Toyota where each model broke off from another model by becoming roomier or sportier or fancier?

submitted by /u/davidjschloss
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How was static shock explained in the past, before electricity was understood?

Posted: 19 Dec 2021 09:37 AM PST

In school I learned the number antibodies your body produces in response to an infection never decays to zero but instead decays to some baseline. Does that baseline increase with subsequent reinventions of the same disease?

Posted: 20 Dec 2021 11:06 AM PST

Why should we wait for 6 months before getting a booster shot?

Posted: 19 Dec 2021 12:44 PM PST

For some vaccines like Pfizer and Moderna it is recommended to wait for 6 months before getting a booster shot. In some places it is not just recommended, but enforced -- you can't get a booster before 6 months pass. So why is it 6 months and not 3, 4, 5, 7 or 8? Is it mostly bureaucratic/logistical issue, or are there some actual medical reasons for that?

I've heard that for Delta and Omicron protection after 6 months is noticeably lesser than after 3 months. So wouldn't it be better to get a shot every 3 months? Would it make serious side-effects more likely?

I've heard rumors that too many shots of some vaccine can give you immunity from adenovirus it is based on, so that could also be a reason to not get boosters too often. But I haven't heard estimations on how many is "too many". And that probably shouldn't apply to mRNA vaccines anyway?

Edit: BMJ has published some relevant information today.

submitted by /u/Ashtero
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What causes hair loss from eating disorders?

Posted: 19 Dec 2021 07:38 AM PST

Is it a high stress level? Or lack of nutrients or something

submitted by /u/TheRealGreenTreeFrog
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Did every person with red hair come from the same mutated person, or did the mutation happen multiple times?

Posted: 18 Dec 2021 01:49 PM PST

I first posted this in r/askhistorians hoping for a sort of time line, but it was removed for being a science question. I am no expert but I'd appreciate any insight someone could give here!

I was reading that the people in England originate from the same group as the Celts. But the Celts have a higher percentage of red hair. But the red hair gene I thought originated 30 000 + years ago in Asia. So was it that one person in Asia who's descendents ended up being Celts but somehow not English? Or did the mutation happen again independently of being passed down from them?

Thank you!

Edit: thank you for all the replies. I'm really happy that so many people are curious about this as well. I apologize for generalizing and referring to the Irish and Scottish as 'Celts'. The Celts are a diverse group not limited to that region!

submitted by /u/redwinterberries
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Is there a difference in how our immunity system reacts to viruses in the airways vs viruses in the lungs?

Posted: 19 Dec 2021 11:23 PM PST

I just saw this article referencing a study done in Hong Kong which found that Omicron seems to replicate 70 times faster in airway tissues than delta, but 10 times slower in the lungs.
My main question is, is there a difference in the way the immune system will attack Covid 19 when it's in the lungs vs when it's in our airways? Would it be less violent of a reaction or is there simply less damage to be done in the airways? Also curious about the speed with which the immune systems gets triggered.

I know and understand that this study hasn't been peer reviewed yet, so we should take it with a whole rock of salt. But it got me curious about the mechanization of our immune system in different parts of our body - and with the assumption that this study is accurate, I'm curious about what it means.

submitted by /u/AxlLight
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Can you catch the Omicron and Delta variants simultaneously?

Posted: 19 Dec 2021 03:10 PM PST

And would you become twice as sick?

submitted by /u/ALW10
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Whats the difference between “Flux Pinning“ and “Quantum Locking“ in Superconductors?

Posted: 19 Dec 2021 03:15 PM PST

How does a space telescope turn?

Posted: 20 Dec 2021 12:12 AM PST

If Hubble or some other telescope is pointed into one direction how can it take images of stars that are, for instance, directly behind it (180°)? I understand that they don't have any propellant to turn them. Also, they can't turn the mirrors. Are they in some kind of constant rotating motion and then actually have just some limited time they can be pointed in a single direction? If you're a scientist and want an image of particular star or galaxy, do you have to wait for the telescope to be pointed in that exact direction?

How does that work?

EDIT: Thanks to /u/katinla, /u/udmh-nto and /u/Temporary_Internal28 I got the information necesssary to answer my question so there's no need to add more comments. Now I know the basics and will continue researching further. :)

submitted by /u/Arthur_Boo_Radley
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Is there a time frame for "full protection" after the third (booster) shot for the covid-19 vaccines?

Posted: 18 Dec 2021 04:51 AM PST

I've been wondering since here in Germany, literally the day you get your booster, you count as having had 3 shots but I remember that for the second one you had to wait 2 weeks until you were "fully immunized". Legalities are one thing, but from a virology point of view, is there such a time frame for the booster shot? I assume that it's shorter because each time your immune system has a shorter response time than before?

submitted by /u/Sniperfuchs
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Can a volcanic island have limestone areas?

Posted: 19 Dec 2021 08:43 AM PST

Is it possible for a volcanic island to have karstic landscape?

submitted by /u/Not_Derwent
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How do oil/fat/soap (or other lipids) help visible light to pass through a paper plate (or any paper or cardboard or very thin wood) when water doesn't?

Posted: 19 Dec 2021 04:47 AM PST

What do we actually mean when we say life forms on earth are carbon based ?

Posted: 19 Dec 2021 07:21 AM PST

Are both of these images of lunar halos?

Posted: 19 Dec 2021 08:18 PM PST

Image I know the top one is, but the lower photo I am not sure. Its a lot smaller of a halo and the moon is behind thicker clouds.

2 follow up questions: If it is not a halo, what is it? If it is considered a halo, does it have the same association with a possible upcoming storm?

Also, was this the best place to post this?

submitted by /u/redditcabbit
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Why is the shortest day of the year (when sub exposure is at its lowest) not more correlated with the coldest time of the year?

Posted: 19 Dec 2021 06:23 AM PST

Another way to ask this is why isn't the winter solstice not the mid point in winter?

submitted by /u/shannister
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How does general anaesthesia work? How can we take away all feeling and consciousness while keeping our breathing, heart beat and hormonal balance?

Posted: 19 Dec 2021 01:12 AM PST

Along with everything else the brain does. It seems much more than just being asleep, more like a disconnection of the brain. So how can we remove some functions while leaving others?

submitted by /u/thackthack
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What is the benefit of putting the jet engines underneath the wings, as opposed to top of them?

Posted: 18 Dec 2021 06:46 PM PST

How does a wild animal population naturally recover from an STD outbreak?

Posted: 17 Dec 2021 08:30 PM PST

Wouldn't a population be perpetually infected and/or die off as a result of STIs? In the case of animals that engage in casual sex or polygyny, I'd expect STIs would be even more easily spread.

This NCBI article Disease and the dynamics of extinction concludes that extinction events due to an infectious disease is relatively unusual…

Without any anthropogenic intervention, hepatitis could easily wipe out troops of bonobos. An outbreak of syphilis would wreck havoc in a pod of dolphins. There may be survivors that recover and possibly develop a resistance…. provided they don't get reinfected, the disease doesn't mutate, their reproductive organs aren't compromised, etc. So, what's the science behind a species surviving from an STD outbreak in the wild kingdom?

submitted by /u/Baskin
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Has the belief in homeopathy decreased within the past few years?

Posted: 17 Dec 2021 08:10 PM PST

It seems like I very rarely hear about homeopathic medicine treated as anything other than quackery anymore. A few years ago it seemed like the Next Big Thing in alternative medicine. What has caused this, or am I incorrect and it is still widely believed in?

Disclaimer: I know homeopathy is objectively BS, just curious where belief in it is compared to 5-10 years ago.

submitted by /u/Cardassia
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Can crustaceans become overweight if pampered the way some household pets do? What does obesity look like for organisms with exoskeletons?

Posted: 18 Dec 2021 11:48 AM PST
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Friday, December 17, 2021

How did the Parker Sun Probe manage to broadcast video, telemetry and other data to Earth, without being affected by solar flares or noise from the radiation?

How did the Parker Sun Probe manage to broadcast video, telemetry and other data to Earth, without being affected by solar flares or noise from the radiation?

How did the Parker Sun Probe manage to broadcast video, telemetry and other data to Earth, without being affected by solar flares or noise from the radiation?

Posted: 17 Dec 2021 06:58 AM PST

Weren't solar flares strong enough to disrupt Earth's ground infrastructure? I've seen the overly exaggerated articles, but at that proximity to the sun, wouldn't it mess with Parker's communication too?

Been wondering how we got that crystal clear video of the Milky Way, with the planets outlines, and with very minimal artifacting.

submitted by /u/TheMusicFella
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Do insects have an immune system? If they don’t, how do they protect themselves from viruses and bacteria?

Posted: 16 Dec 2021 05:55 PM PST

Why does a third dose of mRNA vaccine decrease the infection risk with omicron if the vaccine was developed for another variant and the first two doses offer limited protection against omicron?

Posted: 17 Dec 2021 06:49 AM PST

Why is Omicron considered a variant, rather than a novel coronavirus?

Posted: 17 Dec 2021 09:42 AM PST

I'm no expert, but from what I read it seems that the omicron variant has different symptoms and little-to-no shared immunity. At what point is it just a new coronavirus like the other coronaviruses in the world as opposed to a variant of Covid-19?

submitted by /u/mrHugMeImHuman
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All all rechargeable battery chemistries inherently degrading, or are there technologies either practical or theoretical that would allow for rechargeable batteries that barring mistreatment keep the same capacity?

Posted: 17 Dec 2021 09:49 AM PST

How exactly does a death cap mushroom kill you? What happens, chemically speaking?

Posted: 17 Dec 2021 02:36 AM PST

How long does it take a star to turn on? That is, during formation of a planetary system, the mass in the center condenses and eventually nuclear processes are started. How long does it take until the entire mass is “lit“, and the star begins to shine?

Posted: 16 Dec 2021 01:24 PM PST

Do all Covid variants have the same incubation period, and does such an incubation period mean less selective pressure toward a less deadly mutation?

Posted: 16 Dec 2021 06:11 PM PST

It's my understanding that the key issue with covid is the pre-symptomatic incubation period where it can still spread from person to person, which can last about two weeks.

Have there been any variants that don't have such an incubation period? And does the pre-symptomatic spread mean that a deadlier and more infectious mutation could outcompete less deadly variants?

submitted by /u/FlyLikeATachyon
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Traction control on AWD drivetrain?

Posted: 17 Dec 2021 05:51 AM PST

I was planning a project to make a raspberry pi controlled traction control system for my all wheel drive rc car and was wondering how awd cars measure their true speed. you need a true speed measurement and a drive wheel speed measurement to detect wheelspin and stop it. on a 2wd car you'd just measure from the non-drive wheel. but on awd if you get wheelspin due to excess throttle application then all 4 wheels are spinning and you can no longer read speed. I wanted to post here to see if anyone was familiar with the solution used in real cars?

submitted by /u/danknerd69
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If you move a krummholz (or tuckamore depending where you are) can it grow into a normal tree or is it stunted or mishapen forever?

Posted: 17 Dec 2021 05:42 AM PST

How does a fruit fly, as tiny as it is, detect the direction a smell is coming from, and fly towards it?

Posted: 17 Dec 2021 01:11 AM PST

Does a fruit fly have a "working memory" of what direction it was flying when the olfactory sense of a smell was at its strongest, so that it can keep flying in that direction? In a situation where the air around it isn't moving, and the smell is slowly diffusing into the ambient air, I can't quite conceptualize a way for such a small thing to detect the direction a smell is coming from without some sort of memory, a sense of flying direction, and a process in the brain that associates direction of movement and sense of what direction it was moving when a smell was strongest. Seems like a complex thing for something with a so few neurons and synapse clusters.

Does a fruit fly use visual clues to determine/remember flying direction? If so, could it sense and fly towards a vinegar smell in complete darkness?

submitted by /u/ffelix916
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If mass is converted to energy in nuclear reactions, has the mass of the universe been decreasing since the beginning?

Posted: 16 Dec 2021 12:27 PM PST

Another way to potentially frame the question would be are there instances in the universe where energy is able to form mass?

submitted by /u/themrtroe
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What is causing the J&J vaccine to cause the rare complications that aren't found in Pfizer or Moderna?

Posted: 17 Dec 2021 02:00 AM PST

Is hearing volume proportional to ear/eardrum size?

Posted: 17 Dec 2021 01:48 AM PST

I was watching TV and got concerned that the sound waves from the show would be much larger in proportion to my Cat's eardrum, potentially causing a more substantial vibration, leading to louder sound that may be uncomfortable.

However, I have found little to no info of this online. Any info would help! Wouldn't want to unknowingly damage my cats hearing on something I'd consider to be a comfortable, normal volume.

(Also I have a degree in bio with a zoology focus so feel free to jargon it up :) )

submitted by /u/critty15
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What does it mean to when they say Omicron is more infectious than delta (or spreads faster)?

Posted: 17 Dec 2021 05:05 AM PST
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