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Which body of water separates Papua New Guinea from Australia?
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The body of water that separates Papua New Guinea from Australia is the Torres Strait.
This passage, which is approximately 80 miles (130 km) wide, lies between the Cape York Peninsula of Australia to the south and the island of New Guinea to the north. Geologically, the region was once a land bridge that was submerged by shallow flooding about 8,000 years ago.123