The Cretaceous–Tertiary mass extinction 65 million years ago may have wiped out the dinosaurs, but those that survived — the ancestors of today’s birds — may have done so because of their bird brains.
The Cretaceous–Tertiary mass extinction 65 million years ago may have wiped out the dinosaurs, but those that survived — the ancestors of today’s birds — may have done so because of their bird brains.