Imagine a world where furry mammals scuttle under the feet of gigantic dinosaurs, not yet destined to rule the Earth. It’s a mind-bending thought: the creatures we call mammals, including humans, have ...

By combining data on all known bird species, this tree is the most impressive snapshot yet of one of Earth’s most ...

Professor Emily Jane McTavish and colleagues at the Cornell Lab of Ornithology have mapped the evolution of every known bird ...

"It's been a complete upheaval, says Mark Springer, an evolutionary geneticist at the University of California, Riverside. "We've come up with a very different family tree for mammals." Many ...

A small bone found 30 years ago at Dinosaur Cove could revolutionize our understanding of echidnas and platypuses' evolution.

But we know for certain that this back-to-the-water evolution ... these animals is necessarily a direct ancestor of the whales we know today; they may be side branches of the family tree.

Chimpanzees are often cast as a mirror to our darkest tendencies, embodying violence, territoriality and power struggles. In ...

Birds are the most diverse land vertebrate on the planet, and now scientists have constructed a complete evolutionary tree of the 11,000 or so known species. This data came from hundreds of ...