Shape-changing wings inspire more efficient aircraft designs

We tend to think of aeronautical engineering as having left the birds standing still sometime around the First World War, but since jet fighters can't perch and quadcopters can't snag salmon out of a stream, we still have a few things to learn. Taking a couple of pages from the avian playbook, Fraunhofer Institute for Electronic Nano Systems (ENAS) and its partners are developing wing flaps for airplanes that change shape like a bird's wing for greater efficiency...