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Australia has been inhabited for at least 50,000 years, since the remote ancestors of the current Australian Aboriginal people arrived from Southeast Asia. The land was not discovered by Europeans until the 17th century. It was claimed for Britain in 1770, and first colonised in 1788 as a penal colony. Five other colonies, some penal and some free, were founded in the early 19th century.

Australia is situated in the middle of the tectonic plate, and therefore has no volcanism, although it may sometimes receive minor earthquakes. The terrain is mostly heavily weathered, low plateau with deserts, rangelands and a fertile plain in southeast. Tasmania and the Australian Alps contain a number of permanent icefields and numerous glaciers.

With a population of approx. 170,000 people in the city proper (known as the "city of Sydney") and a metropolitan area population exceeding 4 million, the Sydney metropolis is the larger of the two main financial, transport, trade and cultural centres of Australia (the other being Melbourne, Sydney's long term rival to the title of pre-eminent Australian city).

English is the main official and spoken language in Australia, although some of the surviving Aboriginal communities maintain their native languages. A considerable number of first and sometimes second-generation migrants are bilingual; languages such as Italian, Cantonese and Greek are spoken in many communities.

Melbourne's own vibrant music scene has fostered many internationally renowned artists and musicians, with links to Nick Cave, Crowded House, AC/DC, John Farnham, Graeme Bell and Kylie Minogue.

Perth is the state capital city of Western Australia, the largest state in Australia. Perth is the world's most isolated city of more than a million people. In June 2003 the Perth Metropolitan Area had an estimated population of 1,433,217, making it the fourth largest city in Australia.

The earliest music of Australia was the folk music of the Australian Aborigines. Aboriginal music declined after European colonisation, and has only recently begun to be revived, often with modernised influences. Bands like Yothu Yindi have begun the popularisation of Aboriginal folk in Australia, New Zealand, the United Kingdom and elsewhere. Australia has also been home to notable classical composers as well as artists working in popular music genres such as rock, jazz, country and electronic music.

Australia is home to the Great Artesian Basin - an important source of water for people and cattle in the parched outback. This basin is the world's largest and deepest fresh water basin.