scientists say Coral reef bleaching across happens when stressed coral expel the algae that are their food source and give them their color. If the bleaching is severe and long-lasting ...

scientists say Coral reef bleaching across happens when stressed coral expel the algae that are their food source and give them their color. If the bleaching is severe and long-lasting ...

David Wachenfeld: It's important for people to remember that the Great Barrier Reef is much more than just one coral reef, which is what I think a lot of people think. So, it's actually 3,000 ...