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30 January 2019
Ancient humans colonized diverse environments in Southeast Asia and Oceania

A new study reviews the palaeoecological information associated with hominin dispersals into Southeast Asia and Oceania throughout the Pleistocene (1.25 Millions years ago to 12,000 years ago). Our species' ability to specialize in the exploitation of diverse and 'extreme' settings in this part of the world stands in stark contrast to the ecological adaptations of other hominin taxa, and reaffirms the utility of exploring the environmental adaptations of Homo sapiens.
     The paper, published by scientists from the Max Planck Institute for the Science of Human History focuses on hominin movements across the supposed 'Movius Line' a boundary previously argued to separate populations with different cultural and cognitive capacities. While such divisions and assumptions are now clearly outdated, the authors argue that focus on this part of the world may, instead, be used to study the different patterns of colonization of diverse tropical and maritime habitats by different members of our ancestral line.
     Southeast Asia offers a particularly exciting region in this regard as such records can be linked to a variety of hominins throughout the Pleistocene, including Homo erectus, Homo floresiensis (or 'the Hobbit'), and Homo sapiens. As Patrick Roberts, lead author of the study states the accumulated evidence shows, "While earlier members of our genus appear to have followed riverine and lacustrine corridors, Homo sapiens specialized in adaptations to tropical rainforests, faunally depauperate island settings, montane environments, and deep-water marine habitats."
     The authors hope that, in future, the growth of new methods and records for determining past hominin ecologies will enable similar comparisons to be undertaken in different parts of the world, further testing the unique capacities of our species during its global expansion.

Edited from (28 January 2019)

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