|-488,300,000||EVOLUTION Ordovician period and Early Ordovian epoch begin on Earth. First extinction event.|
|-488,000,000||EVOLUTION Fish develop jaws, gills and armor plating.|
|-475,000,000||EVOLUTION Plants move onto land.|
|-471,800,000||EVOLUTION Middle Ordovian epoch begins on Earth.|
|-461,000,000||EVOLUTION Late Ordovian epoch begins on Earth.|
|-450,000,000||EVOLUTION Arthropods move onto land.|
|-443,700,000||EVOLUTION Silurian period and Early Silurian or Llandovery epoch begin on Earth.|
|-440,000,000||EVOLUTION Ordovician-Silurian extinction event is complete.|
|-428,200,000||EVOLUTION Wenlock epoch begins on Earth.|
|-423,000,000||EVOLUTION Late Silurian or Ludlow epoch begins on Earth.|
|-418,700,000||EVOLUTION Pridoli epoch begins on Earth.|
|-416,000,000||EVOLUTION Devonian period and Early Devonian epoch begin on Earth.|
|-400,000,000||EVOLUTION The first insects and sharks evolve on Earth.|
|-397,500,000||EVOLUTION Middle Devonian epoch begins on Earth.|
|-385,300,000||EVOLUTION Late Devonian epoch begins on Earth.|
|-375,000,000||EVOLUTION Tiktaalik (lobe-finned) fish evolve on Earth.|
|-370,000,000||EVOLUTION Cladoselache, a high-speed shark, develops on Earth.|
EVOLUTION Late Devonian extinction occurs on Earth.
EVOLUTION New insect species evolve on Earth.
EVOLUTION Fish evolve into tetrapods on Earth.
EVOLUTION Plants develop seeds on Earth.
EVOLUTION The golden age of sharks begins on Earth.
EVOLUTION Creation of Wooleigh crater and Siljan Ring on Earth.
|-359,200,000||EVOLUTION Carboniferous period and Early Mississippian epoch begin on Earth.|
|-350,000,000||EVOLUTION Karoo Ice Age begins on Earth.|
|-345,300,000||EVOLUTION Middle Mississippian epoch begins on Earth.|
|-326,400,000||EVOLUTION Late Mississippian epoch begins on Earth.|
|-318,100,000||EVOLUTION Early Pennsylvanian epoch begins on Earth.|
|-311,700,000||EVOLUTION Middle Pennsylvanian epoch begins on Earth.|
|-306,500,000||EVOLUTION Late Pennsylvanian epoch begins on Earth.|
EVOLUTION Supercontinent Pangea forms on Earth.
EVOLUTION Reptiles develop eggs, insects develop wings, forests cover the Earth.
|-299,000,000||EVOLUTION Permian period and Cisuralian epoch begins on Earth.|
|-286,000,000||EVOLUTION The golden age of sharks ends on Earth.|
|-280,000,000||EVOLUTION Dragonflies develop 2-foot wing spans. Vertarates, reptiles eveolve on Earth.|
|-270,600,000||EVOLUTION Guadalupian epoch begins on Earth.|
|-260,400,000||EVOLUTION Lopingian epoch begins on Earth.|
|-256,000,000||EVOLUTION Mammel-like reptiles develop on Earth.|
|-251,400,000||EVOLUTION Mesozoic era, Triassic period and Early Triassic epoch begin on Earth.|
EVOLUTION Karoo Ice Age ends on Earth.
EVOLUTION Permian-Triassic extinction event wipes out 90% of all animals.
|-245,000,000||EVOLUTION Middle Triassic epoch begins on Earth.|
|-228,000,000||EVOLUTION Late Triassic epoch begins on Earth.|
|-220,000,000||EVOLUTION Earth’s climate becomes very dry. Dinosaurs develop.|
|-208,000,000||EVOLUTION Second major spread of sharks.|
|-200,000,000||EVOLUTION Fifth mass extinction event occurs.|
|-199,600,000||EVOLUTION Jurassic period and Early Jurassic epoch begin on Earth.|
|-180,000,000||EVOLUTION Supercontinent Pangea begins to break up on Earth.|
|-175,600,000||EVOLUTION Middle Jurassic epoch begins on Earth.|
|-164,000,000||EVOLUTION Castorocauda lutrasimilis, a swimming mammal lives on Earth.|
|-161,200,000||EVOLUTION Late Jurassic epoch begins on Earth.|
EVOLUTION Giant dinosaurs are common on Earth.
EVOLUTION Birds evolve from theropod dinosaurs.
|-145,500,000||EVOLUTION Cretaceous period and Early Cretaceous epoch begin on Earth.|
|-135,000,000||EVOLUTION New dinosaurs appear on Earth.|
|-133,000,000||EVOLUTION Jeholomis prima, a primitive bird lives on Earth.|
|-130,000,000||EVOLUTION Plants develop flowers, causing a major burst of evolution on Earth.|
|-128,000,000||EVOLUTION A small, feathered tyrannosaur lives on Earth.|
|-125,000,000||EVOLUTION Eomaia scansoria lives on Earth.|
|-123,000,000||EVOLUTION More dinosaurs develop feathers.|
EVOLUTION 12 meter crocodile lives on Earth.
EVOLUTION Carnivorous dinosaurs lives on Earth.