-
Quaternary
end of last Ice Age;rise of human civilization -
Proterozoic Eon
simple multicellular sea creatures develop;
algae and plankton develop; eukaryotic cells develop -
Permian
modern insects; reptiles spread; evergreens; extinction of trilobites -
Archean
earth becomes habitable; spontaneous generation of first cells;
rise of bacteria and cyanobacteria -
Hadean
formation of earth (uninhabitable) -
Mississipian
amphibians spread; sharks and bony fish; wingless insects -
Devonian
first amphibians; freshwater fish; wingless insects -
Silurian
land colonized by arthropods and plants -
Ordovician
trilobites abundant; vertebrates increase -
Tertiary
peak of mammals; modern invertebrates
rise of grazing animals
primitive apes ;whales; first modern mammals
first horses -
Cambrian
sudden explosion of life; tribolites dominant; rise of other marine invertebrates; some vertebrates -
Cretaceous
mass extinctions (including dinosaurs); flowering plants appear -
Jurassic
giant dinossaurs; early birds; first mammals -
Triassic
first dinosaurs; rise of mammals-like reptiles