In the century since Charles Darwin's death in 1882, science has come far toward unraveling one of the central mysteries of nature: the long, tangled story of the evolution of life on Earth. Each generation of scientists has made major new discoveries, answered old questions, posed new ones. As knowledge accumulates, theories become more complex and subtle, questions more fundamental and difficult. In this book, the author has undertaken a journey through space and time to bring together the story of evolution, a story of continuity and change, of life forms strange and familiar, of moving ocntenents and shifting seas. He has visited many lands - the mountains of British Columbia, the Great Rift Valley of Africa, the Grand Canyon of Arizona, the Galapagos Islands - to see the evidence first-hand. He has visited noted research institutions, the Smithsonian among them, to discover how recent findings in geology, paleontology, biochemistry, and even astronomy support or deflate various evolutionary theories.
