Homosapien or human in common language, the same as the rest of us. There is only one species of human on the planet Earth.
However, if the question is asking the origin of the Australian Aborigines, DNA indicates they are most closely related to people of the Indian sub-continent.
Aboriginal is a word used to describe something that is native to its environment. Indigenous means almost the same thing. E.G: The native Americans were Aboriginals... they were indigents of America.
Australian aborigines, like all modern human populations, belong to the Homo sapiens sapiens species. Neanderthals were a separate species of hominins that went extinct around 40,000 years ago.
Of course the can. Humans are one species under the biological species concept and all populations of humans can interbreed.
Aborigines
The British invaded the Aborigines in 1788.
The Aborigines did not differentiate between the different species of wallaby. The word wallaby actually derives from the Aboriginal word wolaba.
Native Australians are referred to as aborigines.
Aborigines Advancement League was created in 1957.
Aborigines' Protection Society was created in 1837.
Aborigines in White Australia was created in 1974.
Aborigines Progressive Association was created in 1924.
Maori Aborigines
There is no evidence to suggest that Julia Gillard hates Aborigines.