Walter B. Myers ©
Precambrian Eon
Infant Earth. 4.5 billion to 542 million years ago
Paleozoic Era
The explosion of life's diversity. 542 to 251 million years ago
Mesozoic Era
The age of dinosaurs. 251 to 65 million years ago
Cenozoic Era
The age of Mammals. 65 million years ago to present
Holocene Epoch
The age of humans. 12,000 years ago to present
Future Earth
The next 6 billion years
