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FLIGHT: The Genius of Birds - Skeletal system

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Published on Jun 3, 2013

A bird's entire skeletal system can account for less than 5% of its total body weight. Yet its bones are strong and flexible enough to withstand the constant stress of flapping, take-offs and landings. In this sequence from FLIGHT: THE GENIUS OF BIRDS you'll observe the elaborate infrastructure of girders and struts that support the interior of the largest bones in a pelican's wings.
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