Main content
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The Horse
5/5 Why do horses run so fast? Chris Packham traces the origins of animal movement.
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The Dolphin
4/5 How did the dolphin get so smart? Chris Packham explores the origins of intelligence.
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The Bat
3/5 Why is the bat so hungry? Chris Packham reveals how feeding has shaped animal life.
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The Ostrich
2/5 Why are ostrich eggs the world’s largest? Chris Packham tells the story of reproduction.
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The Elephant
1/5 How did the elephant get so big? We reveal how a tiny cell became a giant. (R)