12 Elegant Examples of Evolution, compiled by the editors of Nature to celebrate the upcoming 200th birthday of Charles Darwin.

Dinosaurs of a Feather. Archaeopteryx, found in 1861, was long thought to be the first bird. Then it was recognized as something closer to a dinosaur with feathers — but still unique for that. In the 1980’s, however, paleontologists digging in deposits more than 65 million years old in northern China found feathered dinosaurs which very definitely did not fly. Some dinosaurs, it appeared, may have looked far different from our traditional conception — and feathers may first have served an insulating or aesthetic, rather than aerodynamic, purpose.