Theme and Variations

Season 1Episode 1050 minMar 20, 1979
Theme and Variations
A look at some of the huge variety of mammals. Bats number over a thousand species, many hunt insects, some sip nectar, drink blood, and even catch fish. Contrast those which use sonar with the great whales that sing, the star-nosed mole and the giant anteater, and the potential variations become dramatically clear
Theme and Variations has aired on Mar 20, 1979
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