Scientists find unusual donut shapes hiding behind the Great Barrier Reef
 

Scientists find unusual donut shapes hiding behind the Great Barrier Reef
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Australia's Great Barrier Reef is one of the world's great wonders, but scientists have been surprised to find something equally spectacular lurking behind it.

A team from James Cook University, the University of Sydney and the Queensland University of Tech**logy have uncovered an ancient, little k**wn reef off the coast of **rthern Queensland.

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Using LiDAR tech**logy, the researchers were able to map vast fields of the mysterious reef, populated by giant donut-shaped rings. K**wn as Halimeda bioherms, the rings are around 200 to 300 metres (656 to 984 feet) wide and up to 20 metres (66 feet) thick. Because they sit in deeper water, people boating or diving on the reef are unlikely to **tice them. Read more...

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