Dinosaurs live! Or so argue some scientists. The long-lost creatures are still with us—as birds. That theory got a boost from 1996 finds in northeastern China. Sinosauropteryx prima was a 120-million year-old chicken-size dinosaur with sharp teeth, stout legs, a bony tail, and more: Filaments edging the creature’s back may be what remain of protofeathers. And Caudipteryx zoui (left) had actual plumage, complete with a spray of tail feathers.