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. These include: a hypsilophodont centre right eating a plant, a dromaeosaur feathered chasing a coelurosaur in the water upper left and two gavials crocodilians on the far bank. The plants include horsetails, cycads, bennettitalians, and ginkgos.