Episode Info: For centuries, superstition ascribed magical powers to the mythical unicorn. When the first tusks of the narwhal were brought to Western Europe, it was sold as unicorn corn, although the Vikings knew the whale species much earlier. The giant tooths natural purpose remains a matter of speculation, especially as its usually restricted to males. The twist is assumed to have a hydrodynamic stabilizing function. Snailhouses are generally twisted, a highly successful, strong design, as with the extinct ammonites, who ruled the seas a long time before the dinosaurs. For ...
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David Attenborough presents a collection of his favourite natural curiosities found throughout the animal kingdom from armoured giants to crafty insects. .
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