Then, the wing flapping starts! The birds continuously flap their wings, pushing their shoulders forward, exposing their bony spurs. It’s the bird equivalent of pulling back your jacket to show an ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A peculiar fossil ...

Bird physiology is conducive to flight: small size, hollow bones, and generally symmetrical feathers on the wings and tail. It seems like a no-brainer that bird evolution was optimized for flight, but ...

An illustration of the fossil skeleton of the new bird species Imparavis attenboroughi and a reconstruction of what the animal would have looked like in flight ...