Frontispiece courtesy Anthropology Department, Southern Methodist University (SMU)
Cover photo courtesy U. S. Geological Survey (USGS)
| Page | |
|---|---|
| [11] | USGS |
| [12] | USGS |
| [14], [16], [17] | Willard F. Libby |
| [18] | University of Arizona |
| [21] | Massachusetts Institute of Technology |
| [22] | Graduate Research Center of the Southwest |
| [23] | Graduate Research Center of the Southwest |
| [25] | Robert L. Fleischer |
| [26] | Perkin-Elmer Corporation |
| [30] | University of Texas |
| [32] | Graduate Research Center of the Southwest |
| [36] | Massachusetts Institute of Technology |
| [40] | Des Bartlett, Armand Denis Productions |
| [43] | Anthropology Department, SMU |
| [44] | USGS |
| [47] | USGS |
| [59] | Author’s photo courtesy Graduate Research Center of the Southwest |
Footnotes
[1]Words appearing in SMALL CAPITAL LETTERS are defined in the Glossary beginning on [page 49].
[2]The process of natural radioactive decay is described in the Appendix beginning on [page 52].
[3]The U. S. War Department program during World War II that developed the first nuclear weapons.
[4]Drawn to scale, the whole age of man is represented by less than the width of the line.
[5]For more information on the structure of atoms, see Our Atomic World, a companion booklet in this series.
[6]From the Chart of the Nuclides, prepared by David T. Goldman, Knolls Atomic Power Laboratory, August 1964.