A team of researchers has found that bats take advantage of their flexibility by folding in their wings on the upstroke to save inertial energy. Efficiencies of flapping flight: by folding their wings in toward their bodies on the upstroke, bats use 35 percent less energy and reduce aerodynamic drag, compensating for heavier, more muscular wings (Attila Breuer / Sharon Swartz / Brown University) The study, published on April 11 in the Proceedings...
