Get ready to travel back in time. Your voyage will take you to a part of eastern Asia as it looked 130 million years ago. At the time, this region—now in the Chinese province of Liaoning—was warm and dry
Feathers turn out to be surprisingly complicated. First, there's the question of which animals have feathers. For centuries, people thought feathers were unique to birds. Now we know this isn't true. In the last several years, paleontologists have found feathers on various species of extinct dinosaurs. So when did feathers first appear? And how did they evolve? Scientists continue to investigate these questions.
Like all complex biological features, feathers evolved in stages. Fossil discoveries from Liaoning support this idea. Some of the Liaoning dinosaurs had very simple feathers, while others had more advanced ones, similar to those found on modern birds. The evolution of feathers dates back more than 150 million years.