The Age of the Earth begins with a plain answer: "Four and one-half billion years." But keep reading! Dalrymple's comprehensive, authoritative, and altogether magisterial account of the methods used to determine the age of the earth is, according to the reviewer for The Quarterly Review of Biology, "an enormously important book written by an expert for the general scientific public. It is must reading for all interested in the antiquity of nature." Dalrymple, a Supporter of NCSE and a recipient of the National Medal for Science, is Professor Emeritus in the College of Oceanic and Atmospheric Sciences at Oregon State University.