The part you quote embodies a serious misprint. The words “distinguished by the marine Pliocene” should read “distinguished by the name Pliocene.” As I am writing further on the ...

Megalodons are believed to have gone extinct around 3.6 million years ago, and fossils have been found ranging from the early ...

Originating from the North Pacific Ocean, the Ontocetus genus spread to the Atlantic during the Mio-Pliocene transition. This migration was probably facilitated by the Central American Seaway ...