Diprotodon was the largest known marsupial that ever lived. It, along with many other members of a group of unusual species collectively called the Australian megafauna, existed from 1.6 million years ago until about 40,000 years ago (through most of the Pleistocene epoch). Diprotodon spp. fossils have been found in many places across Australia, including complete skulls and skeletons, as well as hair and foot impressions. More than one female skeleton has been found with a baby lying in her po… (More on Diprotodon)