With Australian Aborigines, their legendary Bunyip monsters represent both good and evil, the incarnations of both demons and angels.
Boomerang has no return ability and has been used at least 20,000-30,000 years ago and is often made from mammoth ivory.
According to the Quarternary Science Review, the first people came to settle in Australia more than 50,000 years ago.
The study also revealed that the ancestors of Australian aborigines were separated from the world's first modern humans leaving Africa.