Posts by RosesBouquet‭

With the emergence of cyanobacteria on earth 3.5 billion years ago, the shift from a reducing to an oxidizing atmosphere began. "The atmospheric O${}_{\text{2}}$ levels (in PAL; i.e., normalized to ...

1 answer  ·  posted 5y ago by RosesBouquet‭  ·  last activity 5y ago by RosesBouquet‭