The Rumford Prize, which recognizes contributions to the fields of heat and light, broadly interpreted, was first awarded in 1839 and is one of the oldest scientific prizes in the United States. Previous prize recipients include Thomas Edison in 1895, Edwin Land in 1945, and Enrico Fermi in 1953.

The American Academy awarded the 2021 Rumford Prize to astrophysicist Charles L. Bennett for his contributions to the field of cosmology. The virtual award ceremony included remarks by Academy President David Oxtoby, an introduction from theoretical physicist Marc Kamionkowski, a reading of the Rumford Prize citation by astronaut and scientist Kathryn Sullivan, and a presentation from Charles Bennett. An edited version of the speakers’ remarks follows.