The great stone circle, Stenness on the Isle of Orkney, is situated in a ,reverse’ landscape. The project examined the alignments running from the center of circle through the stones on the circle’s perimeter and the stone holes where stones formally stood (as revealed by excavation). This told them that the stone furthest to the right is oriented upon the last glimmer of a southern Moon occurring only every 18.6 years; the second stone is aligned towards the winter solstice sunset and the stone furthest to our left is aligned to the Moon as it sets into its most northern position every 18.6 years. These are astronomical events that could be seen 5000 years ago. Photo: Douglas Scott.