Andy Burnell dangles his GoPro in the sea when he kayaks and later reviews the footage, and he found that he had been stalked by a 'curious' great white shark that circled him several times. Andy was ...

We thought it was just another sinkhole. But after dropping a GoPro 20 feet down, we saw something shocking — a hidden passage no one had entered before. What began as a simple test turned into a full ...