A new artificial butterfly is revealing the importance of wing veins and of upsy-downsy waverings to swallowtails’ flight.
The tiny machine flaps a pair of wings made of thin polymer film and can stay airborne for four or five meters at a time, until the coiled rubber band powering it unwinds, Hiroto Tanaka of Harvard University and Isao Shimoyama of the University of Tokyo report in the June Bioinspiration & Biomimetics.
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