Paleontologists are divided on the origin of one of our favorite dinosaurs, Tyrannosaurus rex. Some say its ancestry is ...

Fossilized claw tracks discovered in Australia show that the animal group that includes reptiles, mammals and birds formed ...

A special issue of Philosophical Transactions of the Royal Society B takes a bold step toward redefining one of the most ...

A study has found that an ancient protein motif that binds to nucleic acids is functionally "ambidextrous." This means that ...

The origin of reptiles on Earth has been shown to be up to 40 million years earlier than previously thought -- thanks to ...