Four of the world's most adventurous divers push their sport to its limits in The Science of Diving. Three use cutting-edge technology to explore one of the world's deepest diveable wrecks: their quest to go where no one has gone before. The other rejects scuba equipment to dive almost as deep on one breath: for her it is a journey within.

The Science of Diving features an expedition by three of the world's most technically experienced divers to explore and film the wreck of RMS Niagara, a 525-foot (160-metre) luxury liner sunk by a German mine in 1940, which lies at 400 feet (122 metres) off the northern tip of New Zealand. These divers are South African Pete Mesley, Australian Dave Apperley and Welshman Tim Cashman.

Since a salvage operation for gold in 1941, the \'Titanic of the Pacific\' has lain undisturbed. In 1999 Pete and Tim made diving history when they descended to the Niagara using portable breathing equipment. Since then they have dreamt of returning to film the wreck for the first time.

Four of the world's most adventurous divers push their sport to its limits in ...