I went to a vegan potluck on Thanksgiving and met a vegan astrophysicist. I was impressed.
I love that Absolute Zero is unreachable, at least by thermodynamics alone. Scientist are trying to figure out what needs to happen in order to cool something down to 0K or −273.15C. It blows my mind that there could be a limit to cold. At some point the temperature hits a brick wall and cannot go lower, and no one really knows why. Scientist can get near absolute zero, and when they do, matter starts behaving freakishly because there is minimal entropy so there is minimal molecular motion.... That is so freaking cool!
I am but a lowly physics A level brat, but I thought it was because there is no such entity as 'cold' itself, just the absence of heat, and once you run out of available energy... Things stop working.
I would love to be told I'm wrong and there is something even cooler (hurr hurr) going on.
Oooh good point! The word 'cold' as a label is somewhat of a misnomer.
ETA: You probably know more about physics than I do, because I mostly learned what I know on my own. I was a psych major (hence the interest in neuroscience).