Wednesday, December 03, 2014
Our early atmosphere was quite anoxic
‘till early algae terraformed the Earth.
One grand event, replacing gasses toxic?
Or did O oscillate since life’s first birth?
Did evolution make fate manifest?
Inexorable progress of the gene?
Or was the early oxygen repressed?
Methanogenic dominance was seen.
These visions of our past yearn to be fact.
Hypotheses distinct yet plausible.
The dawn of life’s mysterious, abstract,
Lest ancient rocks reveal what’s causable.
Archean soil lets us know the way.
Oxygen came, but then it went away.