Aylesworth begins with a moderate come-on, pointing to the synthesis of protein-related amino acids in the laboratory and the ""complex microstructures"" found in meteorites--and then too ""we can't overlook"" all those flying saucer sightings. When he reviews scientific opinion on the possibilities of life on our sun's other planets, the conclusion is ""no, but. . . . ""It's ""very unlikely"" or ""not indicated"" on the moon and most planets, but who knows? Perhaps by 1977 Wolf Trap will discover some hibernating or dormant state of life on Mars. Looking beyond our solar system are the Green Bank Observatory's Project Ozma calculations which estimate that between 40 and 50 million civilizations are waiting to get in touch with us. Another tolerable summary, complete with muddy photos and ending with that ubiquitous Sagan/Drake plaque designed to tell intelligent aliens all about us.