information:classification, structural:scholar_edition
The prehistory of Australia is the period between the first human habitation of the Australian continent and the colonisation of Australia in 1788, which marks the start of consistent written documentation of Australia. This period has been variously estimated, with most evidence suggesting that it goes back between 50,000 and 65,000 years. This era is referred as prehistory rather than history because knowledge of this time period does not derive from written documentation. However, some argue that Indigenous oral tradition should be accorded an equal status. Human habitation of the Australian continent began with the migration of the ancestors of today's Aboriginal Australians by land bridges and short sea crossings from what is now Southeast Asia. It is uncertain how many waves of immigration may have contributed to these ancestors of modern Aboriginal Australians. The Madjedbebe rock shelter in Arnhem Land is perhaps the oldest site showing the presence of humans in Australia. The oldest human remains found are at Lake Mungo in New South Wales, which have been dated to around 41,000 years ago. At the time of first European contact, estimates of the Aboriginal population range from 300,000 to one million. They were complex hunter-gatherers with diverse economies and societies. There were about 600 tribes or nations and 250 languages with various dialects. Certain groups engaged in fire-stick farming, fish farming, and built semi-permanent shelters. The extent to which some groups engaged in agriculture is controversial. The Torres Strait Islander people first settled their islands around 4,000 years ago. Culturally and linguistically distinct from mainland Aboriginal peoples, they were seafarers and obtained their livelihood from seasonal horticulture and the resources of their reefs and seas. Agriculture also developed on some islands and villages appeared by the 1300s.