"This book chronicles an amazing breakthrough in biologic and geologic science," Schopf writes, "the discovery of a vast, ancient, missing fossil record that extends life's roots to the most remote reaches of the geologic past. At long last, after a century of unrewarded search, the earliest 85% of the history of life on Earth has been uncovered to forever change our understanding of how evolution works." Writes the reviewer for Scientific American, "Schopf ... has a good deal to say about scientists and the way science is done. It all makes for a book that bears out his assertion that 'science is enormously good fun!'"