Recent comments in /f/askscience
_AlreadyTaken_ t1_j46kd5d wrote
Reply to comment by Choosyhealer16 in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
You know about the beef cattle industry, yes?
[deleted] t1_j46k311 wrote
Reply to comment by mckulty in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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nog642 t1_j46jz9m wrote
Reply to How are there more genetic differences between two of us than between us and Neanderthals? by bookposting5
Not sure about this specific case, but in general for this sort of thing (more difference between groups than within them):
Think of like a venn diagram with a large overlap. The difference between the groups is the distance between the two centers of the circles. The difference within the groups is the diameter of the circles. You can see how the former can be smaller than the latter, easily.
More accurately (and more mathy), think of two bell curves. The difference between the groups is the distance between the center of the two bell curves. The difference within the groups is proportional to the standard deviation or variance (4 standard deviations or whatever). Again you an imagine how by just putting the bell curves close together, they can remain clearly distinct while also having more difference within them than between the averages.
For an example more related to this, if you pick a trait like height for example. The difference in average height between people in your town vs the next town over (pretend you live in a town if you don't) is probably smaller than the difference in height between you and your sibling (pretend you have a same-sex sibling), despite the fact you are more closely related to your sibling.
bawki t1_j46ji8u wrote
Reply to comment by backfist1 in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
Let's open a company and call it "organic epi", it still comes from organs but that's why we can call it "organic" right? 😂
[deleted] t1_j46jgp5 wrote
Reply to comment by nadiaco in How do giraffes breathe? by NimishApte
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nadiaco t1_j46j16f wrote
Reply to comment by froggo921 in How do giraffes breathe? by NimishApte
wow. I wonder if similar shaped "dinosaurs" had similar anatomy?
Aseyhe t1_j46ix3k wrote
Reply to comment by [deleted] in How do we know that dark matter isn't just ordinary matter our instruments can't detect? by jmite
That works for gas but not for stars, black holes, asteroids, planets, etc. Their collision rate is negligible, similarly to dark matter. The key point about those galactic collisions is that the lens mass lies ahead of the gas, not the stars.
[deleted] t1_j46is9w wrote
Aethyx_ t1_j46ifwg wrote
Reply to comment by backfist1 in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
Can I ask why you feel so strong about this? What's wrong in asking? If you tell them there's no time/option for that and they just agree, is that an issue?
[deleted] t1_j46iftc wrote
Reply to comment by [deleted] in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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[deleted] t1_j46idlt wrote
Reply to comment by [deleted] in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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gluckspilze t1_j46i9g1 wrote
Reply to comment by UsedUpSunshine in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
Sadly not true. It's a nice ideal that some backyard animal raisers might get close to. But the meat industry produces huge and harmful quantities of waste at every stage. We all end up paying for the consequences of that waste to be dealt with.
https://www.colorado.edu/ecenter/2021/03/04/waste-meat-industry
[deleted] t1_j46hxxv wrote
[deleted] t1_j46hp8e wrote
Reply to comment by [deleted] in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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fighter_pil0t t1_j46hn81 wrote
Reply to comment by julie78787 in What does it mean to torque a screw to a specific torque? by alucemet
I feel like this would be a factor for automatic torque wrenches but not manual ones. As you try to hit the torque correctly you usually slow to a complete stop.
[deleted] t1_j46hmny wrote
[deleted] t1_j46hmbk wrote
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Duenss t1_j46h47z wrote
Reply to comment by shtonkalot in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
Aerosols usually contains greenhouse gases, like way more efficient (maybe not the right word) than CO2
[deleted] t1_j46g6zv wrote
[deleted] t1_j46g5sa wrote
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[deleted] t1_j46fzr1 wrote
Reply to How do giraffes breathe? by NimishApte
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minkey-on-the-loose t1_j46fvem wrote
Reply to comment by W0tzup in What does it mean to torque a screw to a specific torque? by alucemet
Not only the thread, but the compression on a gasket, no?
minkey-on-the-loose t1_j46fqa0 wrote
Reply to comment by Bwyanfwanigan in What does it mean to torque a screw to a specific torque? by alucemet
Those old pointer torque wrenches were good enough for grandpa, they are good enough for me. But those setting torque wrenches sound awesome.
gravelbee t1_j46l0e4 wrote
Reply to When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
Bodies are so complex... it really depends on the type of damage and the location. For example, mild nerve damage - let's say from extreme cold exposure in the fingertips - will cause sensations of pain or discomfort only in the affected area of the nerves involved. On the other hand, a very common example of nerve damage is sciatic pain. The actual site of inflammation is in the lower back/hip area but people will get pain that extends all the way down their leg.