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The earth formed from planetary nebual. Oldest age- dated rocks on earth. Fossil algae and stromatolites. Fossil evidence of bacteria. Fossil evidence of cells with a nucleus. First multi- celled organisms.Oldest marine wor,s and jelly fish.
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3900 million years ago
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Burgess Shale animals. Animals with a notochord.
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First fish. First fossil evidence of land plants.
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First vascular. Oldest lung fish fossils.
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Oldest fossil evidence of mosses. First insects. First lobe-finned fish. Fist land animals. First sharks. First seed plant.
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First possible reptiles.
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Permian system begins. Snail backed reptiles. End of Paleozoic. 96% of all lifre perishes.
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First crodiles. First dinosaurs. First mammals. First turtles.
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Dilophosaurus, early dinosaur. First bird-Archeopteryx. Apatosaurus and Brachiosaurus. Stegosaurus.
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First flowering plants. Duck-billed dinosaurs. Protoceratops. Triceraptops. T-Rex. Velocirapter. End of Mesozoic, possible meteor or comet impact.
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First ancestors of dogs and cats. Grasses become widespread. First ancestors of pigs and deer. First horses. First ancestors of rabbits. First monkeys. Oldest human like ancestors.
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First of 4 Ice Ages. Oldest human- ancestor fossil. Homo habilis. First modern man, homo sapiens. Mammath and mastodon bones. Revolutionary War. World War 2.