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The Australian Constitution guarantees the separation of church and state; there is no state religion in Australia. Although the nation is broadly secular and few are church-goers, three-quarters of Australians are nominally Christian, mostly Catholic or Anglican. A diverse range of other religions are practised.

The Australian aborigines , estimated to number as many as 350,000 at the time of the Europeans' arrival, was numbered at 386,049 (including Torres Strait Islanders, who are of Papuan descent) in 1996. Although still more rural than the general population, the aboriginal population has become more urbanized, with some two thirds living in cities. New South Wales and Queensland account for just over half of the Australian aboriginal population. In Tasmania the aboriginal population was virtually wiped out in the 19th century.

According to Reporters Without Borders in 2004, Australia is in 41st position on a list of countries ranked by Press Freedom; well behind New Zealand (9th) and United Kingdom (28th). With the Howard government taking control of the Senate in mid-2005 after the 2004 election, media ownership regulations are likely to be relaxed so as to allow the further concentration of media ownership in the hands of a couple of entities.

The land that is now Australia was first discovered by Europeans in 1522 by the Portuguese explorer Cristóvão de Mendonça, but it was only in the 17th century that the island continent became the subject of European exploration, with several expeditions sighting Terra Australis: The Dutch explorer Willem Jansz (1606), the Portuguese explorer Luis Vaez de Torres in Spanish service (1607), and the Dutch explorers Jan Carstensz (1623), Dirk Hartog and Abel Tasman (1642), after whom is named the island of Tasmania, but which he himself originally named after Anthoonij van Diemenslandt.

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.

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.

Many raw materials (including resources postulated to exist but yet to be discovered) remain mostly unexploited. Australia is often referred to by economists as the "world's farm", but despite this emphasis on the agriculture sector, in recent years the Australian government has been focusing on the tourism, education and technology markets.

Rich in natural resources, Australia is a major exporter of agricultural products, minerals, metals, and fossil fuels. Commodities account for 57% of the value of total exports, so that a downturn in world commodity prices can have a big impact on the economy. The government is pushing for increased exports of manufactured goods, but competition in international markets continues to be severe.

Since the recession "Australia had to have" (P. Keating) in the early 1990s, the Australian economy has not suffered a recession or "trough" in the business cycle in 13 years. Even the downturn of the early 2000s did not affect its consistent GDP growth. As of October 2004, unemployment had fallen to a level of 5.2%, the lowest level since the late 1970s.

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.

Despite the best intentions of government health schemes and cultural marketing initiatives, the traditional Australian palate is amply serviced by an extensive takeaway food industry.

Australia may have been sighted by Portuguese sailors in 1601, and Dutch navigators landed on the forbidding coast of modern Western Australia several times during the 17th century. Captain James Cook claimed it for Great Britain in 1770. At that time, the native population may have numbered 300,000 in as many as 500 tribes speaking many different languages. The Aboriginal population currently numbers more than 300,000, representing about 1.7% of the population. Since the end of World War II, efforts have been made both by the government and by the public to be more responsive to Aboriginal rights and needs.

Rainfall in Australia is highly variable, with frequent droughts lasting several seasons. Occasionally a duststorm will blanket a region or even several states and there are reports of the occasional large tornado. Rising levels of salinity and desertification in some areas is ravaging the landscape.

The cinema of Australia has a long history—in fact, it is claimed that the first feature-length film, was actually an Australian production, The Story of the Kelly Gang. During the late 1960s and 1970s in influx of government funding saw the development of a new generation of directors and actors telling distinctively Australian stories.