And so, when Richard Branson and a team of scientists took a submersible down to the bottom of Belize’s iconic Giant Blue Hole, they were braced for some truly extraordinary sights. The Blue ...

It's called the Great Blue Hole. Scuba divers and snorkelers have ... reef sharks, turtles, and giant corals. But as they pushed 90 meters, life started to vanish. The culprit was a thick layer ...