Includes bibliographical references (p. 122-123) and index.
Summary:
Discusses the processes by which scientists determine the age of their specimens, such as counting the number of tree rings, reading the strata, and using chemical analyses and the carbon-14 test. Also looks at recent findings that may tell us how old the universe is.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.