Watch a hawk close in on a target.

A robot model of a winged but flightless dinosaur suggests the dinosaur may have flapped its wings while moving on the ground.

High-tech imaging of the Jurassic creature’s humerus and ulna bones reveals it flapped its wings to evade predators.

Dampening the immune response to stay up in the air may have helped bats become tolerant to viral infections.

A visual motion-sensing brain region found in all four-limbed vertebrates displays unique properties in Anna’s hummingbirds.

Duke’s Steven Vogel studied how plants and animals adapt to the physical world.

A newly discovered relative of Velociraptor had abundant plumage and birdlike wings.  

Researchers describe a small species that may have soared through Jurassic skies on membranous wings like those of bats and flying squirrels.

Downsizing dinosaurs was key to the evolution of birds, a study shows.