S3 · E4
13 फ़र॰ 1966 · 1 घं॰
13 फ़र॰ 1966 · 1 घं॰
Horizon looks at the research of dolphins being conducted at a United States naval base in Port Magu, California. The research concentrates on the dolphin's abilities of navigation. The eminent Canadian geologist, Professor Tuzo Wilson, explains his new 'Froth on the Broth' theory of the structure of the earth to David Wilson.
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