Meet Dakotaraptor: the feathered dinosaur that was 'utterly lethal'

Prehistoric carnivores had 9.5in 'sickle claw', and quill knobs on lower arm bones are first documented evidence that a large raptor had feathers

A dinosaur discovered in South Dakota had feathers on a raptor's body, large claws and wings, according to a study published by the University of Kansas Paleontological Institute.

"It really was the Ferrari of competitors," said Robert DePalma, head of the research team that discovered the fossils and curator of vertebrate paleontology at the Palm Beach Museum of Natural History.