A cast of a skull (below) of the marsupial lion, Thylacoleo carnifex, shows its massive jaws and teeth. This distant relative of modern-day koalas and wombats is thought to have been a fearsome predator (right), with studies showing it had one of the strongest bite forces of any known mammalian carnivore, living or extinct. It was likely to have been an ambush predator capable of climbing trees, perhaps much like a leopard today.
This complete skeleton of a Thylacoleo was found in another of the Nullarbor complex of caves that bears its name. It lay undisturbed for about 400,000 years.