Amazon.com (ISBN 0679400036, Hardcover)

On the Galapagos Islands Charles Darwin gave his first hint at his theory of natural selection, writing about the finches he studied there. In Darwin's time there was no proof of this theoretical mechanism for evolution. Indeed it would have been thought absurd to imagine observing it actually happen; the process was thought to take geological time spans. Weiner, an outstanding science journalist, details research done in the last 20 years that proves otherwise. Biologists Peter and Rosemary Grant have documented the evolution of Darwin's Galapagos finches, demonstrating that it is neither rare nor slow, but can be watched by the hour. Weiner's superb account reads like a thriller and won the 1995 Pulitzer Prize for nonfiction.