David Grinspoon Quote
Celled. Then a catastrophe occurred (in the sense of sudden change), a dramatic increase in biodiversity, an anti-extinction, if you will. In a flash, there were not just some animal forms, but all of them. In the fossil record, all modern body types appear together at this moment. We don’t know why this happened when it did. It’s likely that the explosion had to wait until oxygen levels rose high enough to support the greater energy needs of larger bodies,
David Grinspoon
Celled. Then a catastrophe occurred (in the sense of sudden change), a dramatic increase in biodiversity, an anti-extinction, if you will. In a flash, there were not just some animal forms, but all of them. In the fossil record, all modern body types appear together at this moment. We don’t know why this happened when it did. It’s likely that the explosion had to wait until oxygen levels rose high enough to support the greater energy needs of larger bodies,