Dental evidence suggests modern humans reached Sumatra years before we thought.
Research suggests that anatomically modern humans were to be found in Sumatra some 70,000 years ago. This is well before current thinking has it that such humans even left Africa. This story clearly has further to run.
Link to paper: http://www.nature.com/nature/journal/v548/n7667/full/nature23452.html?foxtrotcallback=true
You may also like to browse other evolution posts: http://www.thesentientrobot.com/category/evolution/