Geometric Analysis Reveals How Birds Mastered Flight

In a rectangular room draped in camouflage netting, four Harris’ hawks took turns flying back and forth between grass-covered perches while scientists recorded their every biomechanical flutter. The researchers were partaking of the time-honored pursuit of watching birds fly — although in this experiment, their real interest was in watching them land. In more than 1,500 flights between the perches…

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