"Even now many living creatures arise from the earth, formed by the rain and the warm heat of the sun, so that it is less wonderful if then more and larger ones arose, which grew up when earth and air were young. First the race of winged things and the different birds issued from their eggs being hatched in the springtime, even as now in summer the cicalas of their own accord leave their flimsy husks, to seek life and living. Then first, look you, the earth gave forth the generations of mortal creatures. For there was great abundance of heat and moisture in the fields."
January 1, 1970
https://en.wikiquote.org/wiki/Science_in_classical_antiquity