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John Harlin III attempts to climb the North Face of the Eiger, the site of his fathers death forty years earlier

An underwater voyage to Indonesia to learn about its inhabitants such as giant rays and whale sharks as well as efforts being made in the region for ocean conservation

Meet Dr Hazel Barton and Nancy Aulenbach These women are compelled to push their limits in hostile environments They are cavers who risk fatal danger for the thrill of discovery Barton and Aulenbach are extreme athletes and extre