To trace tusk evolution, researchers needed a more concrete definition to distinguish tusks from teeth and other external ...

Fossilized footprints of a primitive reptile found on a slab of rock from Australia could rewrite the story of how animals ...

A new study suggests two fossil trackways found in Australia were made by an early amniote, a group that today includes reptiles, birds and mammals ...

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