What is the past? It is a time as well as a place. Acclaimed author Peter D. Ward describes the tools that contemporary scientists use to uncover facts about the past - terrain, climate, and the life forms that once inhabited this planet. Time Machines presents fascinating profiles of the deep past and the scientists who are making it come alive. ".for the general reader, Time Machines may be the most interesting book yet by the University of Washington prof." -SEATTLE WEEKLY "For anyone interested in how and why as well as the what of paleontology, Time Machines is a must read."-AMERICAN SCIENTIST