...archaeological evidence at one site called Madjedbebe in the far north of Australia's Northern Territory suggests the area may have been occupied much earlier -- at least 65,000 years ago.Archaeologists recovered human-made artifacts, including stone tools and ocher "crayons," from the Madjedbebe rock shelter and published their findings in a 2017 study. One difficulty in dating the artifacts, however, was the copious amount of sand on the floor of the rock shelter, which can move easily and cause artifacts to fall farther down, making them look older than they are.Although the research team took steps to counteract this issue and...