In April 1994, legendary cave diver Sheck Exley attempted to reach 305 meters inside Mexico’s Zacatón sinkhole — a depth few humans had ever approached. As pressure increased to 27 times that of the ...
Sheck Exley was one of the greatest pioneers in the history of cave diving, responsible for developing many of the safety procedures still used by divers today. In 1994, he joined an expedition to ...
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