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Wing of a dragonfly, detail | by gripspix (OFF)
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Wing of a dragonfly, detail

The wing shows a interesting structure: there are cells with a certain angle (120° and 90°). The structure is the same you can see, when you put foam between two glass plates. (Lit.: Hildebrandt, S: Mathematics and optimal form; Deutsche Ausgabe S. 5)

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Uploaded on August 25, 2007