By Land and by Sea
A long walk down the beach
The first modern humans to cross the Asian continent probably ate seafood. Researchers think these humans traveled along the shores of the Indian Ocean from eastern Africa all the way to Australia. Scientists suggest a coastal route because they find the oldest non-African DNA markers among people living in isolated spots on the Indian Ocean. And archaeological evidence from Australia shows that, by 50,000 to 60,000 years ago, humans had managed to cross the 100 kilometers (60 miles) of open waters that then separated Australia and Asia.