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The Ancestor's Tale
One problem some readers might have is deciding how much of the book to read at a time. The Concestor sections vary in length from 2 pages to 75 pages (when we are joined by the insects). The book emphasises the use of cladistics in classification, that is classifying organisms in terms of clades - groupings of animals with a common ancestor. Also Dawkins shows how decoding the DNA of organisms has lead to a new method of classification, and he makes it clear that he follows this route if there is a conflict with previous classifications. The last two chapters speculate on the origin of life and what might happen if evolution were rerun, which will be of interest to those who have read other books on these subjects.