The discovery of a previously unknown dinosaur skeleton in Morocco sheds some light on a period in history about which we know relatively little. In the high Atlas Mountains of Morocco lie the fascinating footprints of an unknown species of dinosaur, estimated to be 180 million years old. Two world-renowned palaeontologists, Dale Russel, from North Carolina University and Philippe Taquet, from Paris Natural History Museum investigate and reconstruct the fossilized skeleton of the oldest vegetarian dinosaur who lived on earth.