Comment on Fungi Saved the World (2014)parentComments−mabbo8yMaybe, but all evidence seems to point to the equilibrium being at a higher oxygen rate, cooler temperatures, etc.−megaman228yFrom what I understand, the prevalence of enormous invertebrates in the fossil record points at a much higher oxygen percentage, since insect and arachnid respiratory systems aren't efficient enough to support bodies that large otherwise.
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Maybe, but all evidence seems to point to the equilibrium being at a higher oxygen rate, cooler temperatures, etc.
From what I understand, the prevalence of enormous invertebrates in the fossil record points at a much higher oxygen percentage, since insect and arachnid respiratory systems aren't efficient enough to support bodies that large otherwise.