Coral reefs

Test-tube coral: How scientists are saving the Great Barrier Reef

Test-tube coral: How scientists are saving the Great Barrier Reef

Coral sperm is being frozen in a bid to save the UNESCO World Heritage site
Gallery: 10 best dive sites in Asia

Gallery: 10 best dive sites in Asia

Asia is home to some of the world's most spectacular coral reef systems, but human activity threatens their existence
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