New discoveries in the field of human evolution are changing our understanding of human origins almost daily. What does all this new knowledge about our species mean? Science journalist Zimmer offers an illuminating journey through our ancestry, beginning 65 million years ago with the first primates and ending today, as we enter a new phase of evolution. Along the way he re-examines the major steps in human evolution, as hominids began to stand upright, fashion tools and develop consciousness. What's most intriguing, he concludes, is that fossils are no longer the sole source of information about our origins--part of the story of where we came from turns out to be inscribed in our own DNA!--From publisher description.