Director, Hugh O'Connor ; producer, Hugh O'Connor ; executive producer, David Bairstow ; script, Joseph Koenig ; photography, Albert Louis Coquillon, Robert Humble, Eugene Boyko ; sound, Leo O'Donnell ; editing, Robert Russell, Lucien Marleau ; sound editing, Don Wellington, Victor Merrill ; animation, Gerald Potterton, Pierre L'Amare, Kenneth Horn ; music, Maurice Blackburn.

Recorded 1960.

This film begins with a discussion of the most familiar form of radiant energy--sunlight--and the basic similarities and differences between heat, radio waves, X-rays and gamma rays. The effects of atomic radiation on living things is then demonstrated, including a discussion of the possible genetic alterations.

Mode of access: World Wide Web.

Description based on online resource; title from title screen (National Film Board of Canada, viewed 2023-08-10).