Paleontologists have analyzed 125-million-year-old feathers from a dinosaur species called Sinornithosaurus as well as feathers of the early bird Confuciusornis and a 50-million-year-old feather from the Green River biota of Wyoming, the United States. Their results show that the protein composition of modern-day feathers was also present in the feathers of dinosaurs and early birds, confirming that the chemistry of feathers originated much earlier...
