Bird returns 136,000 years after its extinction
Iterative evolution is a rare process when a species emerges after extinction. A chicken-sized bird species that went extinct 136,000 years ago had made a comeback to the earth twice, due to this rare process. When the same or similar structures evolve out of the same common ancestors, but at different time, the Iterative evolution takes place then. This is a first for any bird species, and that is why it is significant.