With a 11-12-m wingspan (37-40 feet), Quetzalcoatlus is the largest flying organism ever known and one of the most familiar pterosaurs to the public. Its fossils were first discovered in 1971 by University of Texas at Austin graduate student Douglas Lawson in Big Bend National Park, Texas, the United States. Despite a half century of interest, Quetzalcoatlus remains very incompletely described. Some paleontologists think the ancient giant rocked forward...
