The Nature of Things

Cystic Fibrosis / Whooping Crane / Cold-Water Survival (21x2)

Air date: Oct 15, 1980

A report on cystic fibrosis, a genetic respiratory ailment that afflicts young people; and a profile of one of its victims, 24-year-old nurse Susan McKellar. Other segments examine the International Crane Foundation's efforts to save the whooping crane from extinction; and research into cold-water survival techniques.