Coral on Australia's Great Barrier Reef, in a picture released by the Great Barrier Reef Marine Park Authority in April 2009. More than 2,600 of the world's top marine scientists Monday warned coral ... more 

Coral on Australia's Great Barrier Reef, in a picture released by the Great Barrier Reef Marine Park Authority in April 2009. More than 2,600 of the world's top marine scientists Monday warned coral reefs around the world were in rapid decline and urged immediate global action on climate change to save what remains less