Title: Excellent, but not very in-depth.
Review: I truly enjoyed this book. It revealed the scientific theory more in the form of a story than just a book of factual information pertinent to the theory.One need not have any knowledge of or even much interest in geology to enjoy this book. The basic outline of Snowball Earth is that there is extensive geological evidence that there was a global freeze-over about 700 million years ago that ended the precambrian era of unicellular "slime", and possibly caused or affected the following cambrian explosion.This book is very much a story of Paul Hoffman and his friends and colleagues, and I would not recommend it for someone looking for an in-depth explanation of the snowball theory.
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