The powerful arms of these gliding creatures evolved into wings over time, he explained. However, because bats do not have ...

Scientists also found fragments of bones. The winged dinosaur’s teeth ... researchers found a similar dinosaur species with bat-like wings. In 2015, Chinese scientists unearthed the remains ...

bat wings have very little stiffness. They consist of a very flexible membrane of skin stretched across jointed bones which have a low mineral content and therefore high flexibility too.

squirrels and "flying" lemurs actually glide or parachute by means of a furred membrane, but only bats have the structural adaptations that allow for full powered flight. The structure of the wing ...

This story appears in the May 2012 issue of National Geographic magazine. The hand is where the mind meets the world. We humans use our hands to build fires and sew quilts, to steer airplanes, to ...