Just as the devil has the best tunes so does nature posses all the best structural forms. Consequently engineers and designers have long looked to nature for inspiration, the results being as varied, mundane and ultimately important as Velcro, turbines and even train noses. The secret of course is knowing where to look. The early "bird men", for example, thought flight was all about flapping. It isn't. It's about air flows, keel-shaped sternums and hollow bones. Once that had been understood
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