The Middle and Late Jurassic Periods were a time in which the dinosaurs took over the world. Learn more about the Middle and Late Jurassic dinosaurs, including the Yangchuanosaurus, Megalosaurus, and Archaepteryx.
Othnielia is a smaller dinosaur that wasn't named until recently. It probably survived on a diet of plants and small insects. The limbs also suggest that this dinosaur would have been a good runner.