Arthur Taylor Winfree (May 15, 1942 – November 5, 2002) was a theoretical biologist at the University of Arizona. He was born in St. Petersburg, Florida, United States. Winfree was noted for his work on the mathematical modeling of biological phenomena (see Complexity and Singularity (system theory)): from cardiac arrhythmia and circadian rhythms to the self-organization of slime mold colonies and the Belousov–Zhabotinsky reaction. Winfree was a MacArthur Fellow from 1984 to 1989, he won the Einthoven Prize for his work on ventricular fibrillation, and shared the 2000 Norbert Wiener Prize in Applied Mathematics with Alexandre Chorin.