Around 55,000-50,000 years ago, a population of modern humans left Africa and started on the long trek that would lead them around the world. After rapidly crossing Eurasia and Southeast Asia, they traveled through the islands of Indonesia, and eventually as far as the continent of Sahul—modern-day Australia and New Guinea.
Click here for original story, Southeast Asia was crowded with archaic human groups long before we turned up
Source: Phys.org