Seicair t1_je691wn wrote

> the properties we expect of a metal, for example, actually depend on the atoms being cool enough to stick together.[...] But since hydrogen and helium are so much lighter than other elements they will still have different behaviour at such temperatures

Hey, that makes sense, thanks for the explanation. I've kinda wondered why they use the terminology myself since I learned it. My specialty is organic chemistry.


Seicair t1_je2cmmp wrote

> The second generation of stars that formed had a middling metallicity, as they formed from material that included the higher-mass elements formed from the first generation of stars.

I’d like to point out for any chemistry enthusiasts not well versed in astronomy. In astronomy, it’s hydrogen, helium, or metal.


Seicair t1_j7i4yh9 wrote

I somehow never heard that. I remember hearing Omicron came out of left field and it was thought to have evolved in an immunocompromised patient due to the sheer number of mutations. I thought Alpha and Beta were two notable strains that were more successful than other small mutations. Now that I look though, I see AB both have a significant number of mutations, just the spike was mostly unchanged.

Fascinating. I studied some microbiology/immunology in school, I would’ve liked to have delved deeper.,1.1.,of%20these%20variants%20%5B1%5D.


Seicair t1_j46lt0m wrote

It’s this, just barely down the wiki page they linked. That’s it, that’s the chemical composition of adrenaline, no matter where it comes from. I don’t know what you mean by size.


Seicair t1_ixt8t5f wrote

So, if you visit two thanksgiving gatherings, and you’ve seen none of the people involved in weeks, your odds of transmitting a contagious disease from one gathering to another is very low to nonexistent?

I suppose that would depend on fomites on clothing and such, wouldn’t it.


Seicair t1_irddgod wrote

I don’t know the evolutionary reasons behind it. All vertebrates with the exception of one Antarctic icefish use hemoglobin or heme to transport oxygen, but a lot of invertebrates use hemocyanin (copper based, blue blood), and there are multiple different iron containing compounds that are in use among invertebrates.