2 ms·
Interesting enough, oxygen (O2) came after cyanobacteria evolved on Earth - there was no free Oxygen until then: https://en.wikipedia.org/wiki/Great_Oxidation_E
by designium 7y ago
Interesting enough, oxygen (O2) came after cyanobacteria evolved on Earth - there was no free Oxygen until then: https://en.wikipedia.org/wiki/Great_Oxidation_Event https://en.wikipedia.org/wiki/Great_Oxidation_Event