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Australia is home to the only three extant monotreme species in the world - two echidnas and the Platypus. The only placental mammals naturally found on the Australian mainland are bats; a large number of rodents which arrived only about 5 million years ago, and the Dingo, which was introduced to Australia by humans perhaps 7000 years ago.

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.

While Australia has ubiquitous media coverage, the longest established part of that media is the Australian Broadcasting Corporation (ABC), the Federal Government funded organisation offering national TV and radio coverage. The ABC, like the BBC in Britain, is a non-commercial public service broadcaster, showing many BBC or ITV productions from Britain.

Australia's economic development was slow at first and based on the export of wool. This all changed with the discovery of gold in 1851 and mining has, overall, been the most important sector of the Australian economy. By the late 20th century, Australia had a prosperous Western-style mixed economy, with a per capita GDP on par with the four dominant Western European economies. In recent years, the Australian economy has been resilient in the face of global economic downturn, with steady growth. Rising output in the domestic economy has been offsetting the global slump, and business and consumer confidence remains robust. Australia's emphasis on reforms is another key factor behind the economy's strength. In the 1980s, the Labor Party, led by Prime Minister Bob Hawke and Treasurer Paul Keating, played a crucial role in modernizing Australia's economy.

The first English explorers were Willem Dampier on the west coast of the continent in 1688, and Lieutenant James Cook who, in 1770, claimed the eastern two-thirds of the continent for Britain, despite orders from King George III to first conclude a treaty with the indigenous population. His report to London that Australia was uninhabited (see Terra nullius) provided impetus for the establishment of a penal colony there following the loss of the American colonies.