Stock Photo - Jurassic life. Computer artwork of a forest with prehistoric creatures that existed during the Jurassic Period 200 to 145 million years ago in what is now North Yorkshire, England, UK. Here a feathered dromaeosaur right is chasing a coelurosaur left in a river surrounded by various plants including horsetails, cycads, bennettitalians, and ginkgos. On the far bank are two gavials crocodilians.