Peter Sanders

In 622 CE the Prophet Muhammad and his first followers rode some 450 kilometers from Makkah to Madinah along a segment of the caravan route that had long linked the Arabian Peninsula to North Africa and the Levant. In 2005 the discovery of an isolated monolith led to a 15-year archeological quest that has identified 55 similar and regularly spaced stones that appear to predate the ninth century CE. The discoveries are now helping locate with precision historic sites, thanks to the measure of distance between the milestones: 1,609 meters, give or take a few. Whether intact or broken; standing, fallen or partially buried, each stone is now being studied, and together they tell stories of history, faith and science.