A type of bird that went extinct evolved again
A bird called a white-throated rail went extinct 136 000 years ago but then evolved again, in a process called iterative evolution. The same conditions appeared again and the same evolution happened again. What were those conditions? The birds settled on an island with no natural predators, and they became flightless. From the Independent:
Bird that went extinct 136,000 years ago comes ‘back from the dead’ after evolving again