side of the body being moved together and the forelimbs being lifted out of the way of the hindlimbs. This study also suggests that the wings of pterosaurs were only attached to the body, with the legs and feet being tucked underneath, much like how modern birds tuck their legs beneath their own bodies in flight. Cultural significance In 1975, artist Giovanni Casselli depicted Quetzalcoatlus as a small-headed scavenger with an extremely long neck in the book The evolution and ecology of the Dinosaurs by British paleontologist Beverly Halstead. Over the next twenty-five years prior to future discoveries, it would launch similar depictions colloquially known as a "paleomeme" in various books as noted by Darren Naish. In 1985, the US Defense Advanced Research Projects Agency (DARPA) and AeroVironment used Quetzalcoatlus northropi as the basis for an experimental ornithopter unmanned aerial vehicle (UAV). They produced a half-scale model weighing , with a wingspan of . Coincidentally, Douglas A. Lawson, who discovered Q. northropi in Texas in 1971, named it after John "Jack" Northrop, a developer of tailless flying wing aircraft in the 1940s. The replica of Q. northropi incorporates a "flight control system/autopilot which processes pilot commands and sensor inputs, implements several feedback loops, and delivers command signals to its various servo-actuators". It is on exhibit at the National Air and Space Museum. In 2010, several life-sized models of Q. northropi were put on display on London's South Bank as the centerpiece exhibit for the Royal Society's 350th-anniversary exhibition. The models, which included both flying and standing individuals with wingspans of over , were intended to help build public interest in science. The models were created by scientists from the University of Portsmouth. See also List of pterosaur genera Timeline of pterosaur research References External links Quetzalcoatlus at EarthArchives.org Azhdarchids Late Cretaceous pterosaurs of North America Ojo Alamo Formation Maastrichtian genus extinctions Taxa named by Douglas A. Lawson Fossil taxa described in 1975 Quetzalcoatl