Spiraling Flight Of Maple Tree Seeds Inspires New Aerial Surveillance Technology

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Maple tree seeds and the spiraling pattern in which they glide to the ground have delighted children for ages and perplexed engineers for decades. Now aerospace engineering graduate students have learned how to apply the seeds' unique design to aerial devices that can fly, hover and perform surveillance in defense and emergency situations.

More... (http://www.sciencedaily.com/releases/2009/10/091020162007.htm)