Apatosaurus

Two Apotausorus individuals cross a monsoonal rain pond in Colorado, which is lapping around tail vertebrae of a Camarasaurus. A lone Stegasaurus browses at the edge of an open cycad-conifer forest in the background. The Moon, much closer to Earth than now, lacks later, meteor-induced crater Tycho. Late Jurassic, about 150 million years ago.