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4 of 4 people found the following review helpful:
5.0 out of 5 stars
Resolving Darwin's Dilemma, 3 Aug 2005
Schopf escorts us into the realm of deep time, introducing us to our earliest microbe ancestors found locked away in ancient rocks. The path is often vague and indistinct, but Schopf is a sure and eloquent guide. Not only has he traversed the route before, but he's helped select and clear the track. This fine book reflects Schop's lighthearted "trailside" manner. He fully enjoys scrutinising the rocks for early lifeforms, and the enjoyment is infectious. It's a pleasure to accompany him on this journey.Of all the ideas of the origins of life, none proved more exciting than the experiments of Harold Urey and Stanley Miller. Their zapping of elemental chemicals to produce amino acids seemed the final answer to how it all began. Years of criticism of their work and assumptions led to the acclaim fading, but Schopf here attempts to resurrect its primacy. His argument relies on his findings of evidence of wide-ranging shallow seas - Darwin's famous "warm, shallow pond" as the place of life's origins. Schopf argues these seas were present at the same time simple life-forms emerged. In Darwin's time, the techniques for analysing the early rocks were limited. Today, as Schopf demonstrates, looking in the right place with the proper tools brings rich paleontological rewards. After tracing the histories of several researchers in Pre-Cambrian fossils, Schopf goes on to illustrate the most recent finds and their significance. Some of the finds are beyond the realm of the rocks alone. His description of the process of polymer formation illustrates the beginning of complex chemistry leading from non-life to life. The distinction, as he notes, has become vague as research from many disciplines has been applied to evolutionary studies. As life progressed, it developed such talents as use of light energy, self-perpetuating activities, and the emergence of metabolism. He explains these processes in quite readable prose, but also depicts them with fine illustrations. It's a rare combination of multi-level presentation. Schopf's tour takes us not only into deep time, but deep space. At the end of the book he examines the issues surrounding the "Martian meteorite" which was suspected to contain remnants of life on that planet. Schopf was the lone dissenter in NASA's presentation of the likely presence of micro-organism fossils. His disappointment in the presentation and the hype surrounding the proposal is keenly expressed. One of his proposals in this book is the universality of life's roots. Lifeforms of some level are almost inevitable on other worlds, given the necessary conditions. He argues the components are available throughout the cosmos, needing only the proper environment to start evolving. It would be exciting to detect evidence of past life on Mars, but meteorite ALH80001 didn't provide it. [stephen a. haines - Ottawa, Canada]
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