This pilgrimage through 3 billion years of life on earth is one of the most amazing books I have ever read on the subject of evolution. Starting with us, Dawkins takes us on a journey back through time meeting up with our increasingly distant common ancestors (concestors) along the way until we get back to the beginnings of life itself, a point in time that is marked by the first steps along the molecular road of heredity. Each chapter has a tale to tell about the process of scientific discovery, of the wonder of evolution, told through the example of a particular member of the latest pilgrims to join.
There is so much information in this book that every day I was reading it I'd find some nugget to relate to my wife and children: how did we learn to walk bipedally; why are we hairless and drink milk; what do platypuses use their bills for; how are animal bodies segmented; what did the first vertebrate look like; what have whales and hippos got in common. Why we know what we know through phylogenetic, taxonomic, molecular and fossil data is explained fully in the chapters that deal with our meeting with each successive concestor, but Dawkins is also careful to note where there are gaps in our knowledge and offers possibilites for their solution.
This book is truly impressive.
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