Permian–Triassic extinction
252,000,000 BCE* · Event
Largest mass extinction in Earth's history.
On these timelines: Master, The Age of Dinosaurs
Around 252000000 BCE
- First dinosaurs (230000000 BCE)
- Mesozoic Era (252000000 BCE)
- Triassic Period (252000000 BCE)
- First pterosaurs take flight (228000000 BCE)
- Therapsids, the proto-mammals (275000000 BCE)
- Archosaurs emerge (250000000 BCE)
- Lystrosaurus (252000000 BCE)