Everybody knows--or thinks they know--Charles Darwin, the father of evolution and the man who altered the way we view our place in the world. But what most people do not know is that Darwin was on board the HMS Beagle as a geologist--on a mission to examine the land, not flora and fauna. Retracing Darwin's footsteps in South America and beyond, geologist Rob Wesson treks across the Andes, cruises waters charted by the Beagle, hunts for fossils in...