Feathered dinosaurs. Conceptual artwork showing a feathered dinosaur (Velociraptor mongoliensis, centre) attacking an early ancestor of the bird, Archaeopteryx lithographica. This velociraptor was a voracious predator that lived during the Campanian period (84-75 million years ago). It may have had a coating of feathers on its skin but it would not have been capable of flight. A. lithographica lived during the late Jurassic period, around 150 million years ago. It had feathered wings composed of three clawed fingers but retained some dinosaur characters, including small teeth and a long tail. The dinosaur group from which Archaeopteryx evolved is disputed.
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