In the beginning. Precambrian Era- 4.6 billion to 543 million years ago
Early and eerie life. Cambrian Period- 543 million to 490 million years ago
A new underwater world. Ordovician Period- 490 million to 439 million years ago
Onto the land. Silurian and Devonian Periods- 439 million to 363 million years ago
Wet and wild. Carboniferous and Permian Periods- 363 million to 251 million years ago
The rise of reptiles. Triassic Period- 251 million to 208 million years ago
Dinosaur giants. Jurassic Period- 208 million to 146 million years ago
The great dinosaur period. Cretaceous Period- 146 million to 65 million years ago
Mammals against birds. Paleocene and Eocene Epochs- 65 million to 35 million years ago
Mammals rule. Oligocene, Miocene, and Pliocene Epochs- 35 million to 1.6 million years ago
Cold times, hard times. Pleistocene Epoch- 1.6 million to 10,000 years ago
Here today, gone tomorrow. Holocene Epoch- 10,000 years ago to today.