Similar explanations of the megalithic complex have been proposed by other eminent prehistorians.19 However, these explanations were invalidated by the discovery of dating by the radioactivity of carbon and by dendrochronology.20 It has been possible to show that the megalithic sepulchers (“chamber tombs”) of Brittany were built before 4000 B.C. and that in England and Denmark stone tombs were being built before 3000 B.C.21 As for the gigantic complex of Stonehenge, it was thought to be contemporary with the Wessex culture, which was linked with the Mycenaean civilization. But analyses based
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