We tend to view ancient history as a collection of static monuments. Stone circles, pyramids, and deep-cave paintings feel permanent because they are made of materials that resist the elements. Yet, some of our oldest cultural landmarks survive only because humans have committed to endlessly repairing them.
On a steep hill in Oxfordshire, England, sits a minimalist, stylized figure of a horse stretching over 360 feet long. Known as the Uffington White Horse, this prehistoric geoglyph