Weighing Flight David Frank and James Gorman With a new device scientists measure the force of a wingbeat while birds fly freely. February 9, 2015 at 12:00AM http://nyti.ms/1M6ClWy http://nyti.ms/1KARZbe The New York Times Science Birds

By David Frank and James Gorman via NYT / Eethg. Corps. Inc. / Terrence Herschel G. Science http://nyti.ms/1M6ClWy Weighing Flight February 9, 2015 at 12:00AM http://nyti.ms/1KARZbe The New York Times