Amazon.com description: Product Description: Edgar Rice Burroughs vision of Mars was loosely inspired by astronomical speculation of the time, especially that of Percival Lowell, who saw the red planet as a formerly Earth-like world now becoming less hospitable to life due to its advanced age. Burroughs predicted the invention of homing devices, radar, sonar, autopilot, collision detection, television, teletype, genetic cloning, living organ transplants, antigravity propulsion, and many other concepts that were well ahead of his time. The books in the Barsoom series were an early inspiration to many, including science fiction authors Robert A. Heinlein, Arthur C. Clarke and Ray Bradbury, they influenced renowned scientist Carl Sagan in his quest for extraterrestrial life, and were instrumental in the making of James Cameron’s Avatar, and George Lucas’ Star Wars.