Horizon - Science Fiction: Science Fact?

Seizoen: 1965 - Aflevering: 14 / 439 - Eerst uitgezonden: 28 juli 1965 - Episode ID: 457879

Is all science fiction mercly fantasy-or can it give valuable clues to the future? Also: Desmond Morris interviews naturalist George Schaller about his work with gorillas studying their behavior in the wild, and work studying tigers in the wild.