The marsupial lion, which vanished around 40,000 years ago, was a muscular ambush predator about the size of a modern lion.

Ancient collagen preserved in the bones of extinct Australian mammals is revealing their evolutionary relationships, leading to some surprises.

A gardener growing eucalyptus seedlings for koala habitats has found his plants being eaten by a single greedy one. Nicknamed "Claude" for his sharp claws, this thieving koala is thought to have eaten ...

Standing around 3 feet high, the modern koala is roughly 25 pounds of claws and teeth, tufty ears and fluffy white marsupial tummy. You could give one a hug — experts suggest that they prefer it if ...