Trails everywhere. Trails permeate the world - invisible ant trails, hiking trails and roads between continents, highways, trails and hyperlinks on the web. How are these pathways formed? Why do some trample and stay, while others disappear? What makes us walk on or off the trail? Having come from and studied thousands of variations of various paths, Moore found that it is in the paths that the answers to the most important questions lie - how the world around us was formed, how living organisms first got to land, how order arose from chaos and, in the end, how we choose our path through life.