Italy's geologic history becomes a personal tale in Walter Alvarez's new book

Italy's mountains, from the Apennines to the Alps, have fascinated University of California, Berkeley, geologist Walter Alvarez for more than 35 years, resulting in a new book, "The Mountains of Saint Francis," that traces Italy's billion-year geologic history with a focus on Italian geologists and their groundbreaking - and often overlooked - discoveries.

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