ornithischian

What happens when you find a feathered dinosaur that really isn't meant to have feathers? That's the question set by a spectacular new fossil that adds a confusing dimension to the origin of feathers. The concept of dinosaurs with feathers is no longer surprising. Birds certainly have them and they are now considered to be living dinosaurs. The infamous Velociraptor and its relatives were covered in plumes, which ranged from the simple quills of Sinosauropteryx to the flight-capable plumes on Microraptor's four wings. We know about these prehistoric feathers through the beautiful fossil…