GDR asks:
...and just why does that chemistry exist?
You have heard about multiverses, yes? Imagine gazillions of them arising every planck time with all kinds of different atomic/subatomic constants. Most will vanish instantly, some will last a while longer and some will last billions of years. The Evolutionary Cosmology, sort of an offshoot of the Anthropomorphic Principle, would argue that we just happen to be in one that has these constants that we observe that create this chemistry.
- xongsmith, 5.7d