20 million Americans have an undiscovered but measurable hearing loss. Dr. Goodman helps uncover and treat hearing loss in children and adults. An expedition of American physicians and theologians to India examined the ancient heritage of Tibetan medicine. Living in exile, Tibetan physicians preserve practices believed similar to those in use at the time of Aristotle. Dr. Crosett shows how his department justifies its use of the expensive and sophisticated machinery of nuclear medicine.