Geological Time of Life

Can you enter the periods and epochs from the beginning of complex life to present-day?

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Last updated: March 24, 2025

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Era	Period	Epoch	MYA	Key Event(s)
Cenozoic	Quaternary	Holocene	0.01	Historical time
	Quaternary	Pleistocene	2.6	Ice ages
	Neogene	Pliocene	5.3	Bipedal human ancestors
	Neogene	Miocene	23	Earliest direct human ancestor
	Paleogene	Oligocene	33.9	Origin of many primates
		Eocene	55.8	Angiosperm dominance increases
		Paleocene	65.5	Major radiation of mammals, birds and pollinators
Mesozoic	Cretaceous		145.5	Dinosaurs become extinct
	Jurassic		199.6	Dinosaurs abundant and diverse
	Triassic		251	Origin of mammals
Paleozoic	Permian		299	Radiation of reptiles
	Carboniferous		359	Vascular plants and amphibians
	Devonian		416	First tetrapods and insects
	Silurian		444	Diversification of early vascular plants
	Ordovician		488	Colonisation of land
	Cambrian		542	Sudden increase in many animal types