Researchers may have just found the answer: Unlike birds, the evolution of bats' wings and legs is tightly coupled, which may have prevented them from filling as many ecological niches as birds.

and being described as “rats with wings.” What do you think of this popular conception of the bird? "We have gulls that feed ...

Taking inspiration from bird feathers, Princeton engineers have found that adding rows of flaps to a remote-controlled aircraft's wings improves flight performance and helps prevent stalling ...