Amazonians share an unexpected genetic link with Asian islanders,

[Yo_Mama]

3. You might be interested in this separate article

http://www.nytimes.com/2011/09/23/science/23aborigines.html?_r=0

The Aborigine occupation of Australia presents a series of puzzles, starting with the nature of their stone tools. The early stone tools found in Australia are much simpler than the Upper Paleolithic tools that appear in Europe at the same era. “I don’t understand why they looked so primitive,” said Richard Klein, a paleoanthropologist at Stanford University.

Primitive as the tools may be, the first inhabitants of Australia must have possessed advanced boat-building technology to cross from the nearest point in Asia to Sahul, the ancient continent that included Australia, New Guinea and Tasmania until the rise of sea level that occurred at the end of the last ice age, 10,000 years ago. But there is no archaeological evidence for boats, Dr. Klein said.