Mesozoic Earth - Diplodocus and pterodactyls

Location North America 150 million years ago Mean atmospheric O₂ 130% of modern level Mean atmospheric CO₂ 7x pre-industrial level Mean temperature 3°C above modern level		Geologic Time Scale Era: Mesozoic Period: Jurassic Epoch: Late Age: Kimmeridgian

	Diplodocus and pterodactyls Dinosaur sauropods of the genus Diplodocus leisurely graze on sparse vegetation while several pterodactyls pass overhead 150 million years ago in what is today North America. 115 feet long and weighing over 10 tons, from the tip of tail to its diminutive head Diplodocus is the longest known dinosaur.