Rolf Muller, professor of Astronomy at the University of Potsdam, found convincing evidence to suggest that the most important features of Machu Picchu possessed significant astronomical alignments. From these, through the use of detailed mathematical computations concerning star positions in the sky in previous millennia (which gradually alter down the epochs as the result of a phenomenon known as precession of the equinoxes), Muller concluded that the original layout of the site could only have been accomplished during ‘the era of 4000 BC to 2000 BC’.10 In terms of orthodox history, this was
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