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Early human settlement of Sahul was not an accident.

ABSTRACT: The first peopling of Sahul (Australia, New Guinea and the Aru Islands joined at lower sea levels) by anatomically modern humans required multiple maritime crossings through Wallacea, with at least one approaching 100?km. Whether these crossings were accidental or intentional is unknown. Using coastal-viewshed analysis and ocean drift modelling combined with population projections, we show that the probability of randomly reaching Sahul by any route is <5% until ?40 adults are 'washed off' an island at least once every 20 years. We then demonstrate that choosing a time of departure and making minimal headway (0.5 knots) toward a destination greatly increases the likelihood of arrival. While drift modelling demonstrates the existence of 'bottleneck' crossings on all routes, arrival via New Guinea is more likely than via northwestern Australia. We conclude that anatomically modern humans had the capacity to plan and make open-sea voyages lasting several days by at least 50,000 years ago.

SUBMITTER: Bird MI

PROVIDER: S-EPMC6579762 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Early human settlement of Sahul was not an accident.

Bird Michael I MI Condie Scott A SA O'Connor Sue S O'Grady Damien D Reepmeyer Christian C Ulm Sean S Zega Mojca M Saltré Frédérik F Bradshaw Corey J A CJA

Scientific reports 20190617 1

The first peopling of Sahul (Australia, New Guinea and the Aru Islands joined at lower sea levels) by anatomically modern humans required multiple maritime crossings through Wallacea, with at least one approaching 100 km. Whether these crossings were accidental or intentional is unknown. Using coastal-viewshed analysis and ocean drift modelling combined with population projections, we show that the probability of randomly reaching Sahul by any route is <5% until ≥40 adults are 'washed off' an is ...[more]

PMID: 31209234

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Early human settlement of Sahul was not an accident.

Publications

Early human settlement of Sahul was not an accident.

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