Life on Earth-3,700,000,000
Cambrian-540,000,000
Ordovician-485,400,000
Silurian-443,800,000
Devonian-419,200,000
Carboniferous-358,900,000
Permian-298,900,000
Triassic-252,000,000
Jurassic-201,300,000
Cretaceous-145,000,000
Paleogene-66,000,000
Neogene-23,000,000
Quaternary-2 588 000
First living organisms-bacteria
First animal traces and algae
First animals with shells, sponges
Jellyfish
First chordates
First fishes
Sudden diversification of metazoan families
First vascular land plants
First amphibians
Jawed fishes diversify
First reptiles
Scale trees
Seed ferns
Major extinctions
Reptiles diversify
First dinosaurs
First mammals
Dinosaurs diversify
First birds
First flowering plants
First primates
Extinction of dinosaurs
Mammals diversify