As a child growing up in Central Asia, I saw people piling up stones, sticks, and other debris along the ancient lines people used to control herds and wild ani

As a child growing up in Central Asia, I saw people piling up stones, sticks, and other debris along the ancient lines people used to control herds and wild animals. The ones built for hunting often had a narrow, funnel-like end, while those meant for managing herds could take on almost any shape. One of the photos in that article looks exactly like the walls I remember from my childhood.