Biology — History of Life on Earth
Major events across the geological eons (Ma).
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title "Major events in the history of life"
axis -4000 0
era -4000 -2500 "Archean" color slate
era -2500 -541 "Proterozoic" color blue
era -541 0 "Phanerozoic" color green
event -3500 "First prokaryotes"
event -2400 "Great Oxygenation Event"
event -1500 "First eukaryotes"
event -600 "First animals"
event -540 "Cambrian explosion"
event -370 "Tetrapods on land"
event -250 "Permian extinction"
event -66 "Dinosaur extinction"