Biology — History of Life on Earth
Major milestones over four billion years (millions of years ago).
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title "History of life on Earth (Ma)"
axis -4000 0
era -4000 -2500 "Archean" color slate
era -2500 -541 "Proterozoic" color teal
era -541 0 "Phanerozoic" color green
lane "Milestones"
event -3800 "First prokaryotes"
event -3500 "Photosynthesis"
event -2400 "Great Oxidation Event"
event -2100 "Eukaryotes"
event -600 "Multicellular life"
event -540 "Cambrian explosion"
event -370 "Land plants & tetrapods"
event -252 "Permian extinction"
event -66 "Dinosaur extinction"