Up until the 1950’s, it was widely believed that Australia wasn’t inhabited by the Aboriginals until 10,000 years ago. The breakthrough use of Carbon 14 dating extended the date to around 40,000 years ago. New techniques such as optically stimulated luminescence (OSL) and accelerator mass spectrometry (AMS), are giving evidence for an earlier date for arrival. Charles Dortch has dated recent finds on Rottnest Island, Western Australia at 70,000 years BP and following the analysis of pollen and charcoal, there were suggestions of people using fire to clear land in the Lake George basin in the Southern Tablelands of New…