2 ms·
Well, the Great Oxidation Event might count. https://en.wikipedia.org/wiki/Great_Oxidation_Event https://en.wikipedia.org/wiki/Great_Oxidation_Event
by AndrewDucker 7y ago
Well, the Great Oxidation Event might count.
https://en.wikipedia.org/wiki/Great_Oxidation_Event https://en.wikipedia.org/wiki/Great_Oxidation_Event