“An extraordinary diversity of {{w|marsupial}}, {{w|monotreme}}, bird and {{w|reptile}} fauna had developed from {{w|Gondwana}}n ancestors. Small, sharp-fanged marsupial 'lions'; cow-sized browsing {{w|diprotodon}}s; giant kangaroos, even a kangaroo thought by its dentition to have been carnivorous; and huge, 3-metre flightless birds were all present.”