A masterpiece of analysis and imagination. . . It centres on a sensation al discovery in the field of palaeontology - the existence, in the Bur gess Shale. . . of 530-million-year-old fossils unique in age, preservat ion and diversity. . . With skill and passion, Gould takes this mute coll ection of fossils and makes them speak to us. The result challenges s ome of our most cherished self-perceptions and urges a fundamental re-assessment of our place in the history of life on earth Sunday Times.