160418-N-PO203-722 STANFORD, Conn. (Apr. 18, 2016) Office of Naval Research-sponsored researchers at Stanford University recently found a new way to precisely measure the vortices created by birds' wings during flight. The results shed greater light on how these creatures produce enough lift to fly -- and challenge the accuracy of three aerodynamics models long used to predict animal flight. ( Navy photo by Lentink Lab, Stanford University/Released)

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