Out of the skulls of babes. Modern birds have skulls that look remarkably like those of juvenile dinosaurs, offering an unusual explanation for how birds came to have relatively large brains.
As dinosaurs evolved into birds, something arrested their development. The juvenile heads they kept may be responsible for their relatively high intelligence, and their incredible evolutionary success.
Birds are living dinosaurs, having evolved from feathered dinosaurs similar to the Velociraptor. They were the only dinosaurs to survive the mass extinction that took place 65 million years ago.