Not to detract or digress, but oxygen is damaging to cellular life as well, just long term. If nothing else gets you beforehand, with age as all mammals "we car

Not to detract or digress, but oxygen is damaging to cellular life as well, just long term. If nothing else gets you beforehand, with age as all mammals "we caramelize (glycation) & we go rancid" (oxidation). When photosynthesizing microorganisms emerged and oxygenated the planet, it likely wiped out 90% of life as it existed pre-oxygen (not multicellular back then --- which could well predominantly be an adaptation to protect weaker "inner" cells against oxygen, anyway --- the other great adaptation was proto-mitochondria getting an actual massive energy boost from burning oxygen rather than being burned by it, and here we are today!)