Riddle Of The Porpoise

Year Published: 1960

Format: 16mm

Sound: sound

Description: Reporter Grant Holcomb talks with Dr Kenneth Norris, curator of Marineland of the Pacific in California, about the sonar system of porpoises. Norris and his associate John Prescott demonstrate their studies about the nature and degree of sophistication of this sonar system, using a tame porpoise and research equipment.

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