Four-Winged Dinosaur Chinese scientists announce a spectacular fossil find in this week's journal Nature. They describe six specimens of small dinosaurs with fully developed feathered wings on their front and back legs, and long feathery tails. Dinosaur experts say they could hold the key to how flight evolved. But as NPR's John Nielsen reports, that all depends on whether the fossils are real or not.

Four-Winged Dinosaur

Chinese scientists announce a spectacular fossil find in this week's journal Nature. They describe six specimens of small dinosaurs with fully developed feathered wings on their front and back legs, and long feathery tails. Dinosaur experts say they could hold the key to how flight evolved. But as NPR's John Nielsen reports, that all depends on whether the fossils are real or not.