It's a cold, drizzly night in a forest west of Melbourne. I'm sitting on a damp log, clutching a thermos of lukewarm tea and watching a koala snooze on a branch above me. Suddenly, it lifts its head.

Yahoo News has opted not to describe the method used in the video, as it can induce stress in koalas. One of the travellers ...

Everyone thought koalas were solitary creatures. But a new paper reveals there is more to the social lives of koalas than previously thought.