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.

COROMANDEL VALLEY, Australia -- Picture a Christmas tree and you'll probably think of baubles, tinsel and fairy lights, but one Australian woman came home to find an unusual adornment: A koala.

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 ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. KANSAS CITY, Mo. — The koalas have arrived, ...