The mustatils are giant stone monuments that are about 7,000-year- old. The Arabic name ‘mustatils,’ means rectangle. These vast structures made of stone piled into rectangles, are some of the oldest large-scale structures in the world. Mustalis were previously recognized from satellite imagery and as they were often covered by younger structures, it had been speculated that they might be ancient, perhaps extending back to the Neolithic. Recent studies reveal new, interesting information that may shed light on the purpose of these massive stone monuments. Dr. Huw Groucutt from the Max Planck Institutes for Chemical Ecology, the Science of Human...