On the basis of recent archaeological evidence it seems that humans first entered the Australian continent about 60,000 years ago. These first ocean-going mariners had a high level of technological and economic skill, and had spread right across Australia into a wide variety of environments by about 35,000 years ago. Pigment showing clear signs of use occurs in almost all Australia's oldest known occupation sites, and evidence of self-awareness such as necklaces and beads has been found in several Pleistocene rock shelters. Rituals were carried out in connection with disposal of the dead, for at Lake Mungo there is a 25,000-year-old cremation, and ochre was scattered onto the corpse in a 30,000-year-old inhumation. Complex symbolic behaviour is attested at least 40,000 years ago by petroglyphs in the Olary district, and other evidence suggests a similar antiquity for rock paintings. The special focus of this article is cognitive archaeology, the study of past ways of thought as derived from material remains, particularly the development of early Australian artistic systems.