4 ms·
An asteroid can hit the earth and do the same thing. Is it not natural either?
by x3n0ph3n3 8y ago
An asteroid can hit the earth and do the same thing. Is it not natural either?
- User23 8y agoAnd cyanobacteria transformed the entire atmosphere, to such a degree that almost everything else died out: https://en.wikipedia.org/wiki/Great_Oxygenation_Event https://en.wikipedia.org/wiki/Great_Oxygenation_Event