ABSTRACT
“Let me ask you to picture the surface of the earth as still entirely enveloped in water. All plant and animal life still pursues its existence in an environment of sea-water. Geologic and atmospheric conditions are such that portions of the ocean bed become raised above the surface of the water. The animals and plants thus set upon dry land must either succumb or else adapt themselves to a land and air existence … As soon as the fish was stranded upon dry land and became an amphibian, the male developed special callosities on the thumb for holding fast to the female, and later, after it had been transformed into a reptile, evolved specific male sex organs, thus making provision that the fertilized ova safely reached the uterus of the female, there to develop.”
