Can It Really Rain Frogs?
Frogs. Prehistoric Frogs Did you know amphibians have been around for... an estimated 350 million years. The earliest known frog appeared about 190 million.
Chapter 03FIG 1 Figure 3.1 Paleozoic amphibians, Crassigyrinus (group, incertae sedis) and Diplocaulus (Nectridea). Adapted from Milner et al., 1986, and.
