Between 75,000 and 50,000 years ago, humans began to make their way across the megacontinent of Sahul, a landmass that connected what is now Australia, Tasmania, New Guinea, and the Aru Islands.
studies, one that modeled patterns of population movement and growth via a grid-based system and one that charted the probable 'superhighways' of exploration based on landscape features.As well as extending the prediction for the time it took to settle the megacontinent due to restrictions imposed by the topography, the new model also identified an undetected new corridor of movement southwards through the center of Sahul.
The researchers also suggest that trips to Tasmania would have been restricted by the rise and fall of sea levels in the Bass Strait – an example of how the new model factors in the influence of the landscape on population spread. "Our updated modeling shows that New Guinea was populated gradually over 5,000 to 6,000 years, with a focus initially on the Central Highlands and Arafura Sea area before reaching the Bismarck Archipelago in the east,""The peopling of the far southeast and Tasmania is predicted to have occurred between 9,000 and 10,000 years following initial arrival in Sahul."
The researchers think that their findings could apply to other parts of the world when it comes to mapping how
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