PBS
Nova: Bone Diggers: Australia's Vanished Beasts
Get profiles of 10 different examples of Australia's extinct megafauna. Each profile includes a picture of what the animal looked like.
Museums Victoria
Melbourne Museum: Meet the Skeletons: Varanus (Megalania) Priscus
Varanus priscus was a prehistoric lizard that lived in Australia in the Pleistocene Period. Some information and pictures can be found here.
PBS
Nova: The Extinction Enigma
45,000 - 50,000 years ago the megafauna of Australia became extinct. This interview investigates several possible causes such as, continental drift, human impact, and climate change.