Dismissing evolution and Biblical creation as equally improbable, the author hypothesizes that intelligent extraterrestrials are the sources of thee and me--by colonization (and frequent follow-up visits). To shore up such a theory you just pick out all the balls-of-fire legends, god-and-mortal romances, and the like and interpret them as UFOs coming and going with their pilots meeting and mixing. This enables you to account for just about everything--Stonehenge, Macchu Picchu, yetis, petroglyphs, or pulsars--as manifestations of an intergalactic intelligence. When the broth is thin, lace it liberally with lines like, ""Clearly this is evidence for. . . is it not logical that. . . ."" Well, logical it isn't. Stuff for the True Believer, it is.