- 251 MYA -The Mesozoic Era starts, and the Triassic Period begins.
- 230 MYA - The first Dinosaurs appear.
- 200 MYA - The Jurassic Period begins.
- 145.5 MYA- The Cretaceous Period begins.
- 65.5 MYA (DOOMSDAY)- The Earth is hit with a sudden asteroid impact and increase in volcanic activity spell doom for the non avian dinosaurs .
- c. 64 MYA- The Cenozoic Era begins.
- c. 64 - 49 MYA - Avian Dinosaurs Flourish
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