TOOB FEATHERED DINOSRecently, scientists have discovered that many dinosaurs were feathered! This Toob includes a feathered Psittacosaurus, Protoceratops, Pachycephalosaurus, Chasmosaurus, Apatosaurus, T rex, Caudipteryx, Dilong, Beipiaosaurus, Microraptor, Velociraptor and Sinornithosaurus. History: The actual hypothesis that birds were descendants of dinosaurs was suggested as early as the mid 19th century by biologist Thomas Henry Huxley. However, without significant