Seventy thousand years ago, the sea level was much lower than today. Australia, along with New Guinea and Tasmania, formed a connected landmass known as Sahul. Around this time—approximately 65,000 years ago—the first humans arrived in Sahul, a place previously devoid of any hominin species.
Researchers reconstruct landscapes that greeted the first humans in Australia around 65,000 years agoSeventy thousand years ago, the sea level was much lower than today. Australia, along with New Guinea and Tasmania, formed a connected landmass known as Sahul.Due to the patchy nature of the archaeological record, researchers still don't have a full picture of the routes and speed of human migration across the region.
On top of the evolving landscape, we then ran thousands of simulations, each describing a possible migration route. From these simulations, we calculated the speeds of migration based on available archaeological sites. Estimated speeds range between 0.36 and 1.15 kilometers per year. This is similar toFor both scenarios, our simulations also predicted a high likelihood of human occupation at many of the iconic Australian archaeological sites.From the predicted migration routes, we produced a map of most likely visited regions, with probability of human presence as shown above.
Based on our model, we didn't identify well-defined migration routes. Instead, we saw a"radiating wave" of migrations.
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