Willard F. Libby

Biography

Willard Frank Libby (December 17, 1908 – September 8, 1980) was an American physical chemist who changed archaeology and paleontology with his work in radiocarbon dating. Born in Grand Valley, he studied at the University of California, Berkeley, earning his chemistry degree in 1931 and his doctorate in 1933. His early research was on radioactive elements and the development of Geiger counters to measure weak radioactivity.

During World War II, Libby worked on the Manhattan Project at Columbia University's SAM Laboratories, helping develop the gaseous diffusion process for uranium enrichment. After the war, he became a professor at the University of Chicago's Institute for Nuclear Studies, where he made his most important discovery: radiocarbon dating. This method, using carbon-14 isotopes, allowed scientists to accurately date archaeological specimens and geological samples.

Libby’s nuclear science expertise led to his involvement in national policy and atomic energy governance. He joined the General Advisory Committee of the Atomic Energy Commission (AEC) in 1950 and became a commissioner in 1954, as the only scientist on the commission. He supported Edward Teller's hydrogen bomb program, took part in the Atoms for Peace initiative, and defended the administration's nuclear testing policies. He also discovered that tritium could be used to date water and wine.

In 1959, Libby left the AEC to become a chemistry professor at the University of California, Los Angeles (UCLA), where he worked until he retired in 1976. At UCLA, he broadened his impact by establishing the first Environmental Engineering program in 1972 and leading the Institute of Geophysics and Planetary Physics starting in 1962. He also served on the California Air Resources Board, helping improve the state’s air pollution standards. His marriage to fellow scientist Leona Woods linked him to another key figure in nuclear research.