It's called the Great Blue Hole. Scuba divers and snorkelers have been cruising the surface waters for decades, but few have dared to venture deeper and explore what lies beyond the blackness.

Vessels involved in the last twelve months in the project include Canada's RV Coriolis II (Blue hole and San Jorge Gulf); SB-15 Tango (Namuncurá-Burdwood bank); Dr. Holmberg (South Georgia ...

Scientists took a 98-foot core sample from the bottom of the Great Blue Hole off the coast of Belize to uncover patterns of tropical cyclones over the last 5,700 years. . | Credit: Schafer & Hill ...