The Environment of Vertebrate Life in the Late Paleozoic in North America: A Paleogeographic Study. By Prof. E. C. Case. (Publication No. 283.) Pp. vi + 273. (Washington: Carnegie Institution of ...

3 min read The Carboniferous period, part of the late Paleozoic era ... agile, lizard-like animals. Africa collided with eastern North America in the late Pennsylvanian, an event that formed ...

Therapsids formed a wide-ranging group of four-legged animals, with only mammals surviving today. During the late Paleozoic, they played a major role in life on land, long before dinosaurs appeared.

A recent study shows that marine oxygen levels were crucial to the evolution of early Paleozoic trilobite body size, ...