Like other megafauna, Diprotodon left no fossils to prove its existence in northern Australia, but based on the variation in the isotope signatures of its incisors, researchers think they migrated.
Diprotodon was 1.8 meters tall at the shoulder, almost 4 meters long, and approaching 2800 kilograms, taking the prize for the most mega of the megafauna of Australia as its largest mammal ever.
Diprotodon, meaning "two forward teeth", is the largest known marsupial ever to have lived. Along with many other members of a group of unusual species collectively called the "Australian megafauna", it existed from approximately 1.6 million years ago until extinction some 46,000 years ago (through most of the Pleistocene epoch).