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Australia is the world's sixth-largest country by total area, but it has the world's lowest population density, with only around 3 people per square kilometer.
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The Great Barrier Reef, located off the coast of Queensland in northeastern Australia, is the world's largest coral reef system and is visible from outer space.
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Australia is home to many unique animals, including the kangaroo, koala, wallaby, wombat, and Tasmanian devil, which are not found anywhere else in the world.
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The world's longest fence, known as the Dingo Fence or Dog Fence, runs for 5,614 kilometers (3,488 miles) across Australia to protect livestock from wild dogs and dingoes.
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The Australian capital city of Canberra was purpose-built and designed by American architect Walter Burley Griffin, who won a competition to create the city's layout in 1912.