Alison Isenberg, professor of history and co-founder of the Princeton-Mellon Initiative in Architecture, Urbanism and the Humanities, died on Oct. 23, 2025. She was 63.

Russell Kulsrud, an emeritus professor of astrophysical sciences, died on September 23, 2025. He was 97.

Morton Kostin, who advanced the theoretical underpinnings of chemical engineering, died on May 23, 2025, at age 89.

Robert Lisk, professor of biology, emeritus, died on Sept. 12. He was 88.

Austin Newton, an emeritus professor of molecular biology, died May 13, 2022. He was 85.

Isabelle Clark-Decès, a professor of anthropology, passed away June 29, 2017.

William G. Bowen, president of Princeton University from 1972 to 1988 and a professor of economics and public affairs, emeritus, died Oct. 20, 2016.