Lesson 17: Evolutionary Timeline Explorer

Key events in the history of life on Earth | HSC Biology Module 6

Precambrian (4.6 BYA – 541 MYA)
Paleozoic (541 – 252 MYA)
Mesozoic (252 – 66 MYA)
Cenozoic (66 MYA – present)
Mass Extinction

Click any event to expand details. Events are positioned approximately to scale.

PRECAMBRIAN
~88% of Earth's history
PALEOZOIC
MESOZOIC
CENOZOIC