97% of animal species over 110 lbs (50 kg) disappeared between 50,000 and 40,000 years ago.
Extinctions in Australasia
Researchers are actively studying the role of humans, as well as an increasingly dry climate, in Australasian extinctions.
Most large animal species started to disappear around the time human remains appear in Australasian's fossil record. The saltwater crocodile and the red kangaroo are the only surviving wild animals weighing over 100 lbs (46 kg).