Thousands of years ago, Indigenous peoples in the Andes assessed their climate, geography, and ecology and realized that, to provide better support for agriculture and herding, they needed to harness water. Their solution was to build hydraulic infrastructure, such as canals, terraces, reservoirs, and dams. Archaeologist Kevin Lane reveals the story of canals on the coast and in the Central Andes and explains how these old technologies are being repurposed today to deal with the effects of climate change.