Linchpin of Flight (IMAGE)

Brown University

Linchpin of Flight

Caption

Using computer modeling, treadmills and the fossil record, researchers have shown that the acrocoracohumeral ligament (AHL), a short band of tissue that connects the humerus to the shoulder joint in birds, was a critical element in the evolution of flight.

Credit

David Baier/Brown University

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Must credit David Baier and Brown University

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