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The sharing of animal and plant species between adjacent parts of Australia, Papua New Guinea, and Papua and nearby Indonesian islands point to early land bridges closed when sea levels rose. The historically traditional movement of people between these places in primitive sailing craft for trade and fishing, point to the possibility of Arab and Chinese traders to the northern islands learning of and then visiting the shores of the southern continent from as early as the 9th century. Maps compiled in Europe from the late 1400s show parts of the coastline.

To the visitor from the northern hemisphere, many of Australia's birds will immediately seem familiar - Australian wrens look and act very like northern hemisphere wrens, Australian robins seem to be close relatives of the northern hemisphere robins - but in fact the majority of Australian passerine birds are descended from the ancestors of the crow family, and the close resemblance is misleading: the cause is not genetic relatedness but convergent evolution.

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 has produced a wide variety of popular music. While many musicians and bands (some notable examples include the 1960s successes of The Easybeats and the folk-pop group The Seekers, through the heavy rock of AC/DC, and the slick pop of INXS and more recently Savage Garden) have had considerable international success, there remains some debate over whether Australian popular music really has a distinctive sound. Perhaps the most striking common feature of Australian music, like many other Australian art forms, is the dry, often self-deprecating humor evident in the lyrics.

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).