Rocky Point in Arnhem Land, Australia, was part of the interior when the first humans arrived Lynn Gail/Getty Images
FOOTPRINTS in the sand marked the beginning of the end of an epic journey. They were left fleetingly on a mangrove-fringed beach in south-eastern Asia some 65,000 years ago, when a group of humans lashed together a bamboo raft in the hope that it would carry them over the horizon.
They eventually washed up on the shores of Sahul, a lost continent made up of Australia, New Guinea, Tasmania and a lot of what is now seabed. This…