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IntroductionThe controversy surrounding the origins of man and civilization seems more intense today than it has ever been.Until recently, two opposite explanations were offered. One is the religious concept of divine creation ; the other is the theory of evolution through natural selection, first postulated by Charles Darwin in the nineteenth century. While the evolutionary theory probably has more adherents than the concept of divine creation, both are, for many reasons, totally unsatisfactory.Recently, a third hypothesis has been advanced, namely, that the 'gods' of antiquity were, in fact, visitors from an advanced culture elsewhere in space, and that Homo sapiens was created by them from existing apelike forms by the use of advanced biological engineering techniques.But there is a fourth possible explanation: that Homo sapiens may not be native to this world, but arrived here as a resuh of colonization from elsewhere in space, and, further, that all the civilizations we know were founded upon the wreckage of an earlier, greater culture which was destroyed.Every new discovery about the past, particularly the remoter periods, suggests a high state of knowledge at a very ancient period.There are many examples:A German engineer working in Baghdad found among various bric-a-brac in a museum articles of unknown antiquity that proved to be parts of electric batteries.The Chimu of South America carried out gold plating with results that today can be achieved only by electroplating.An aluminum belt was found in a grave in China. Aluminum is extremely difficult to refine from bauxite ore, and requires a highly complex technical plant.A mechanical calculating device consisting of a series of