Australia officially the Commonwealth of Australia is a country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller island, It is the world’s sixth-largest country by total area.
Inhabited by Aboriginal peoples since prehistoric times, the Dutch explored Australia from 1606; British colonization began in 1788, as did the transportation of convicts from Britain, a practice that was discontinued in 1868. Australia was declared a commonwealth in 1901 when the six colonies (New south Wales, Victory, Queensland, south Australia, Western Australia, and the offshore island of Tasmania) federated as sovereign states; Northern Territory achieved similar status in 1978.
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