Even dinosaurs love a good sunsetAnnalee Newitz8/21/13 8:36pmFiled to: concept artdinosaurspaleoartDeinonychus antirrhopuswolfgang keimartscience585EditPromoteShare to KinjaToggle Conversation toolsGo to permalink It was a beautiful evening at the lake, and Deinonychus antirrhopus ruffled its feathers appreciatively. As to what the ancient animal might have been thinking, we can only speculate that it had something to do with noms. Advertisement Deinonychus antirrhopus was a dinosaur who lived during the early Cretaceous period, and whose length could grow to as much as 11 feet. Its fossils have been discovered in a region known today as the United States — specifically, in Montana, Oklahoma and Wyoming.This illustration is by German artist Wolfgang Keim. You can see more of his incredible work in his Deviant Art gallery.