Outfitted in scuba gear and 100 feet underwater, Cody Unser noticed a weird tingling in her legs. She dived a second and a third time, and again felt tingling. It was subtle, but it was the first ...

The divers hold their breath for minutes to find the "state of quiet there." NILMA GUBA, Russia— -- At first glance, the appeal may not be obvious. You’re 33 feet underwater beneath a solid ...