All tetrapods descended from a common ancestor that just happened to have limbs with five digits. And over the eons of evolution following that, natural selection worked with variations on ...

Particularly determining the resilience of the skeleton in acidifying oceans. Skull evolution and the terrestrialization and radiation of tetrapods The key theme we explore is how did vertebrates ...

Key aspects of early bird evolution have been difficult to resolve, owing to a lack of suitably preserved fossilized remains. A fossilized skull of a bird that lived during the age of the ...

Forty million years before the first dinosaurs, a formidable predator prowled the swampy waters with a skull over two ... for her work on the evolution of early tetrapods—the four-limbed ...