Rosemary and Peter Grant and those assisting them have spend
twenty years on Daphne Major, an island in the Galapagos studying
natural selection. They recognize each individual bird on the
island, when there are four hundred at the time of the author's
visit, or when there are over a thousand. They have observed about
twenty generations of finches -- continuously.
Jonathan Weiner follows these scientists as they watch Darwin's
finches and come up with a new understanding of life itself.
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