A series of five programs inspired by Diane Ackerman's book A Natural History of the Senses, each examining one of the senses. (Part 4 of 5)

Using microphotography to explore the hidden world inside the human body, this program covers three incredible team efforts: the coordination of muscles, bones, heart and circulatory system that makes Mike Powell the world's greatest long jumper; the digestive dynamo that turns a simple sandwich eaten by five-time Olympic gold medalist Bonnie Blair into raw energy for a blistering sprint down the ice; and the ultimate event--the development of a new human life inside track star Karen Hatchett.