Info

145-65 mya

First snakes and modern fish. Extinction of dinosaurs and ammonites, rise and fall of toothed birds

Cenozoic

Tertiary

Paleocene

65-55.5 mya

Diversification of mammals

Eocene

55.5-33.7 mya

First horses, whales, monkeys, and leafminer insects

Oligocene

33.7-23.8 mya

Diversification of birds. First anthropoids (higher primates)

Miocene

23.8-5.6 mya

First hominids

Pliocene

5.6-1.8 mya

First australopithecines

Quaternary

Pleistocene

1.8 mya-8,000 ya

Mammoths, mastodons, and Neanderthals

Holocene

8,000 ya-present

First modern humans

*Millions of years ago (mya)

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