Nah, that's bullshit.

AMER'ICAN, noun A native of America; originally applied to the aboriginals, or copper-colored races, found here by the Europeans; but now applied to the descendants of Europeans born in America.

The first Americans were descended from Australian aborigines, according to evidence in a new BBC documentary.

Until now, native Americans were believed to have descended from Asian ancestors who arrived over a land bridge between Siberia and Alaska and then migrated across the whole of north and south America. The land bridge was formed 11,000 years ago during the ice age, when sea level dropped.

However, the new evidence shows that these people did not arrive in an empty wilderness. Stone tools and charcoal from the site in Brazil show evidence of human habitation as long ago as 50,000 years.

The skull dimensions and facial features match most closely the native people of Australia and Melanesia. These people date back to about 60,000 years, and were themselves descended from the first humans, who left Africa about 100,000 years ago.

But how could the early Australians have travelled more than 13,500 kilometres (8,450 miles) at that time? The answer comes from more cave paintings, this time from the Kimberley, a region at the northern tip of Western Australia.