Migration of Homo sapiens
Early humans are believed to have migrated out of Africa in two main dispersal events. Fossil record s and genetic studies, including mitochondrial DNA and chromosomal DNA, have provided evidence of these migration routes shown in the image below. Genetic studies trace specific markers that show the movement of populations into Asia, Europe, and eventually Australia. Evidence suggests that humans reached Australia around 60,000 years ago, while the migration to the Americas likely occurred later, perhaps as recently as 15,000 years ago, via the Bering Land Bridge.
Source: Yuan, K., Ni, X., Liu, C., Pan, Y., Deng, L., Zhang, R., Gao, Y., Ge, X., Liu, J., Ma, X., Lou, H., Wu, T., & Xu, S. (2021). Refining models of archaic admixture in Eurasia with ArchaicSeeker 2.0. Nature Communications, 12, 6232. https://doi.org/10.1038/s41467-021-26503-5
Migration of Aboriginal and Torres Strait Islander populations
The most widely accepted theory is that Australia’s first peoples arrived in Australia via a maritime route, likely following the coastline from Southeast Asia through what is now Indonesia, using land bridges and short sea crossings. Archaeological evidence, including ancient tools and fossil remains, suggests that these early humans may have arrived in northern Australia before spreading across the vast landscape. Once on the continent, they adapted to diverse environments, developing distinct cultures and languages over tens of thousands of years. Genetic studies show that indigenous Australians have deep ancestral ties to these early migrants, with little gene flow from outside populations until European colonisation. Migration patterns within Australia were likely influenced by seasonal movements, resource availability, and changing climate conditions. There is evidence of groups moving across the continent, particularly along the coastlines and river systems, as shown by the archeological sites indicated in the figure below.
Image source: Big Idea 1: Scientists believe that the first Australians came from somewhere else, National Museum of Australia.
For Aboriginal and Torres Strait Islander populations, the concepts of "Country" and "Place" carry profound cultural, spiritual, and emotional significance, reflecting a deep connection to the land that has been maintained for tens of thousands of years. "Country" refers not only to a specific geographic area or landscape but also to the cultural, spiritual, and ancestral connection to that land. It encompasses the natural environment as well as the living flora and fauna within it.