"Within the last decade, surprising evidence has been amassing that our prehistoric ancestors, so long assumed to have been little more than ignorant savages, knew far more about nature's energy pattersons tha we do now. Detailed surveys of our megalithic structures built four or five thousand years ago reveal the extraordinary astronomical and geometrical knowledge of their builders. Needles of Stone takes this research a strp further, and in a new direction. Tom Graves demonstrates how he and his fellow dowsers can detect the natural energy patterns and flows associated with megalithic structures."--Dust jacket