Why is Australia's extinct kangaroo, Procoptodon goliah, called the T-rex of roos? Learn amazing facts about this giant kangaroo from the Pleistocene. Most importantly, please acknowledge that it was a real 'roo's roo'!

Was Australia's extinct super-predator Megalania (Varanus priscus) the world's largest ever land lizard? Learn about this giant reptile's incredible adaptations. But nobody tell this dragon just how scary it is!