Two-hundred thirty million years
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230,000,000 B.C.: The beginning of the Mesozoic Era. Survivors of the mass extinction at the end of the Plaeozoic Era—in which about 90% of all marine species disappeared—spread and recolonize the world-continent Pangaea. | |||||||||
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180,000,000 B.C.: The start of the Jurassic Period. Dinosaurs reach their peak of diversity; Pangaea begins to break apart. |
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135,000,000 B.C.: The beginning of the Cretaceous Period. Pangaea continues to disperse, leading to increased diversity in its flora and fauna. |
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65,000,000 B.C.: The beginning of the Cenozoic Era. Non-avian dinosaurs are now extinct. Many other types of life, including mammals, flowering planets, and insects, come to the forefront in the dinosaurs' place. |
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2000 A.D. |
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