Australia: The Land Where Time Began
A Diprotodon bone has been that has 28 grooves on its surface. It is believed to be from an megafaunal assemblage dating to about 19,800 +/- 390, but the stratigraphic integrity of the site is thought to be questionable.
Package of cultural Innovations
Phillip J. Habgood & Natilie R. Franklin, The revolution that didn't arrive: A review of Pleistocene Sahul, Journal of Human Evolution, 55, 2008