"The fact that the same proportionalities rule optimal running, flying and swimming is not a coincidence rather it is an illustration of the fact that a universal principle is involved. Running requires the least food when during each cycle a certain amount of work is destroyed by vertical impact and a certain amount to horizontal friction. The same balancing act is responsible for optimal flight and swimming."

Source : "Everybody's Doing the Locomotion". www.foxnews.com. December 30, 2005.

Adrian Bejan

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