when did the aboriginal tribes arrive in australia
Indigenous Australians Indigenous Australians are the Aboriginal and Torres Strait Islander people of Australia, descended from groups that existed in Australia and surrounding islands prior to British colonisation. The time of arrival of the first Indigenous Australians is a matter of debate among researchers. The earliest definitely human remains found in Australia are those of Mungo Man LM3 and Mungo Lady, which have been dated to around 50,000 years BP.[2] Recent archaeological evidence from the analysis of charcoal and artifacts revealing human use has pushed this date back further to around 65,000 B.P. [3][4] Luminescence dating has suggested habitation in Arnhem Land as far back as 60,000 years BP.[5] Genetic research has inferred a date of habitation as early as 80,000 years BP. Other estimates have ranged up to 100,000 years [6] and 125,000 years ago.[7]
Indigenous peoples in Canada The first inhabitants of North America arrived in Canada at least 15,000 years ago, though increasing evidence suggests an even earlier arrival.[40] It is believed the inhabitants entered the Americas pursuing Pleistocene mammals such as the giant beaver, steppe wisent, musk ox, mastodons, woolly mammoths and ancient reindeer (early caribou).[41] One route hypothesized is that people walked south by way of an ice-free corridor on the east side of the Rocky Mountains, and then fanned out across North America before continuing on to South America.[42] The other conjectured route is that they migrated, either on foot or using primitive boats, down the Pacific Coast to the tip of South America, and then crossed the Rockies and Andes.[43] Evidence of the latter has been covered by a sea level rise of hundreds of metres following the last ice age.[44][45]