Although Charles Darwin is identified with his theory of evolution, he was actually onboard the HMS Beagle in the role of geologist, on a mission to examine the land, not flora and fauna. Retracing Darwin's footsteps, Rob Wesson treks across the Andes, cruises waters charted by the Beagle, hunts for fossils in Uruguay and Argentina, and explores sites of long vanished glaciers in Scotland and Wales. As he follows Darwin's path—literally and intellectually—Wesson experiences the land as Darwin did, engages with his observations, and tackles the same questions Darwin had about our ever-changing Earth.