Show me the science: 30 days of evolution blogging, day 1Birds are the modern day descendants of dinosaurs, or as paleontologist Kevin Padian likes to say, birds
are dinosaurs. But how did birds evolve from grounded, naked reptiles into plumed aviators? Evolutionary biologists have been
piecing together the details for nearly 40 years, and this month, a major prediction about feather evolution has been vindicated.
Xing Xu and colleagues at the Chinese Academy of Sciences report the discovery of 120 million-year-old
primitive fossil feathers, whose structure matches a prediction about the evolution of feathers made 10 years ago. With this fossil discovery, all major stages of feather evolution predicted by evolutionary biologists have been found in the fossil record.

Xu, et al., Figure 1, copyright PNAS