Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands.[13] It is the largest country in Oceania and the world's sixth-largest country by total area. Its population of nearly 26 million[7] is highly urbanised and heavily concentrated on the eastern seaboard.[14] Australia's capital is Canberra, and its largest city is Sydney. The country's other major metropolitan areas are Melbourne, Brisbane, Perth, and Adelaide.
Indigenous Australians inhabited the continent for about 65,000 years[15] prior to the first arrival of Dutch explorers in the early 17th century, who na...