In the early Cenozoic era, after the dinosaurs became extinct, the number and diversity of mammals exploded. In just 10 million years -- a brief flash of time by geologic standards -- about 130 ...

5. The Mesozoic marine reptiles were replaced by Cenozoic marine mammals. Whales, seals, sea lions, walruses, and their relatives had evolved from bear-like ancestors by the late Oligocene and early ...

8. Paleocene and Early Eocene jungles were inhabited by archaic leaf-eating and tree-dwelling mammals. 9. Antarctic glaciation began in the middle Eocene to Oligocene time. 10. During the early ...

In “Prehistoric World: Over 1,200 Incredible Mammals and Discoveries from the Mesozoic and Cenozoic,” readers will learn about the warm-blooded animals that rose to prominence once the ...

More information: Alex B. Shupinski et al, Unique functional diversity during early Cenozoic mammal radiation of North America, Proceedings of the Royal Society B: Biological Sciences (2024).

In western North America during the twilight of the dinosaur age, the unquestioned ruler was Tyrannosaurus rex, one of the ...

3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs ... Rodent-size (and perhaps larger) mammals emerged, suddenly free to fill the void.

After the extinction of dinosaurs came the age of mammals. A new book brings readers into this world with well-researched ...