 
        
            Ancient bird
            Confuciusornis
            When feathered dinosaurs roamed the land, true birds soared through
            the Liaoning skies. Some were as big as albatrosses; others, such as
            this Confuciusornis, were more the size of pigeons. This
            fossil, dating to about 120 million years ago, reveals
            characteristics that make Confuciusornis a mix of primitive
            (more dinosaur-like) and advanced (modern bird-like) traits: Like
            dinosaurs and the oldest known bird, Archaeopteryx, it has
            three fingers that are not fused into a single element, but like
            modern birds, it has a toothless beak and a well-developed shoulder
            girdle to power flight.