His arm pinned under a boulder, a climber must amputate it or die.
Extreme heat devastates body and mind; Ken goes to the Australian desert for four days to test the limits of human physiology in this environment, without food or water.
Ken Bradshaw is on a personal quest to find out how to survive in extreme cold. He'll be put in a cold chamber until his body reaches hypothermia levels, and then set out into the arctic to survive it first hand.
Vietnam pilot is shot down.
Dunedin Star wreck; black rhino.
Hikers nearly freeze; a blizzard traps climbers.
The ship Farallon runs aground.
An athlete tests the human body's response to extremes of air and water pressure.