Indigenous Australians are the Aboriginal and Torres Strait Islander peoples of Australia, descended from groups that existed in Australia and surrounding islands before British colonisation. The time of arrival of the first Indigenous Australians is a matter of debate among researchers. The earliest conclusively human remains found in Australia are those of Mungo Man LM3 and Mungo Lady, which have been dated to around 50,000 years BP. Recent archaeological evidence from the analysis of charcoal and artefacts revealing human use suggests a date as early as 65,000 BP. Luminescence dating has suggested habitation in Arnhem Land as far back as 60,000 years BP. Genetic research has inferred a date of habitation as early as 80,000 years BP. Other estimates have ranged up to 100,000 years and 125,000 years BP.