After birds began to evolve separately from dinosaurs at the end of the Jurassic period (around 150 million years ago), two groups of species developed. The Enantiorinthes, which had teeth and clawed ...

2025 — New research has revealed that birds, reptiles, and mammals have developed complex brain circuits independently, despite sharing a common ancestor. These findings challenge the ...

“I like to apply the term ‘bird’ to what I think of as the ‘modern bird group’, that is, the most recent common ancestor of all living birds and all its descendants. To me that’s an unambiguous ...

But a logical question has bedeviled ornithologists for years: If these birds can't fly, how did they spread across the globe? The standard explanation is that their common ancestor, also ...

Rather, birds are included in this diagram because ... that the feature was most likely also present in the animals' common ancestor. Of course, not just the platypus but every living organism ...

For example, modern birds are grouped into the Neornithes clade, because they all emerged from a common Neornithine ancestor ...

Paleontologists continue to discuss the possibility of their even earlier presence in the common ancestor of dinosaurs ... of scales into feathers on the bird's feet. "Since the Shh pathway ...