Scientists find a blue hole so deep that they can't reach the bottom

Scientists haven't been able to reach the bottom.

Deepest blue hole in the world has been found and scientists have no idea what is at the bottom

The deepest blue hole in the world lies just off the coast of Mexico and scientists have been left perplexed. This underwater marine sinkhole is over 420 metres deep and explorers are still unable to ...
Yahoo

Scientists drilled into Belize's Great Blue Hole and discovered a worrying trend

When you buy through links on our articles, Future and its syndication partners may earn a commission. Scientists took a 98-foot core sample from the bottom of the Great Blue Hole off the coast of ...
Quad-City Times

Expedition captures 'cool' new images of Belize's Blue Hole, world's largest sinkhole

A team of scientists, including Virgin billionaire Richard Branson, has returned from a groundbreaking mission to the bottom of Belize's Great Blue Hole with exciting findings. The Great Blue Hole is ...