In Jurassic Park, amber fossils provided the key to bringing dinosaurs back to life. Scientists in the movie extracted dinosaur blood from mosquitoes preserved for millions of years in amber--hardened tree resin--and used the blood's DNA to revive the creatures that terrified audiences around the globe. In this book, George and Roberta Poinar use amber for a similar act of revival--only they bring back an entire ecosystem. The Poinars are world leaders...