The Shape of Life (2002)

Genres - Science & Technology, Nature  |   Sub-Genres - Animals, Biological Sciences  |   Run Time - 60 min.  |   Countries - United States   |  
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Synopsis

Part 3 pays homage to "The First Hunter." Scientists don't know which animal it was, but they suspect it was a flatworm, and that it first hunted some 565 million years ago. It had a "new, centralized nervous system," says narrator Peter Coyote. It also was the first animal with a head, the first with a brain and the first with eyes. This ancient flatworm, a hermaphrodite, was also the first animal to reproduce sexually. Modern hermaphroditic flatworms are seen here mating. "It's more like war than love," Coyote says---and the loser ends up as the mother.

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Keywords

animal, biology, evolution, origins, animal-behavior, genetics, organisms, paleontology, predators, worm [animal]