Lake Mungo 3 (LM3) was discovered by ANU geomorphologist Dr. Jim Bowler on 26 February 1974 when shifting sand dunes exposed his remains. He was found near Lake Mungo, one of several dry lakes in the southeast part of the continent and 500m east of the LM1 site. The body was sprinkled with red ochre, in the earliest known example of such a sophisticated and artistic burial practice. This aspect of the discovery has been particularly significant to indigenous Australians, since it indicates that certain cultural traditions have existed on the Australian continent for much longer than previously thought. At the time of LM3's discovery, it was believed that Aboriginals had arrived in Australia from Asia around 20,000 years ago. Further archeological finds at Lake Mungo suggests that human occupation of the area dates as far back as 50,000 years ago.
For more information, click here. Or, Try these sources:
Thorne, A. G. (1980). The longest link: human evolution in Southeast Asia and the settlement of Australia. In (J. J. Fox, A. G. Garnaut, P. T. McCawley & J. A. C. Maukie, Eds) Indonesia: Australian Perspectives, pp. 35–43. Canberra:Australian National University
Thorne A, Curnoe D (2000). "Sex and significance of Lake Mungo 3: reply to Brown "Australian pleistocene variation and the sex of Lake Mungo 3".". J Hum Evol. 39 (6): 587–600. Can be read here.
Brown P. (2000). "Australian Pleistocene variation and the sex of Lake Mungo 3.". J Hum Evol. 38 (5): 743–9. Can be read here.