A pterosaur scale model over dry lake and tufa pinnacles. ?Built by Paul MacCready and his Aerovironment firm for the Imax film production: ?'On the Wing'.?The?wing-flapping 1/2 scale model mimics the 11 m wing-span 'Quetzalcoatlus northropi' (QN), largest critter to have flown on earth, extinct for 65 million years. ?Patterned after fossilized remains found in the Big Bend National Park by Douglas Lawson and Professor Wann Langston, Jr. ?The dry lakes of the Mojave desert and Death Valley provi