The Center for Arts and Innovation is hosting two speakers Tuesday, Sept. 20.

In collaboration with the Center for Research in Energy and Environment, Dr. Louis J. Gross will present a talk titled “A Rational Basis for Hope: Human Behavior Modeling and Climate Change” 4-5 p.m. Tuesday, Sept. 20, in Room 124 in Butler-Carlton Civil Engineering Hall.

Gross is Chancellor’s professor emeritus and emeritus distinguished professor of ecology and evolutionary biology and mathematics at the University of Tennessee-Knoxville. He is also director emeritus for the National Institutes for Mathematical and Biological Synthesis as well as the Institutes for Environmental Modeling.

In collaboration with the Curtis Laws Wilson Library’s “Americans and the Holocaust” exhibit, Dr. Marilyn Kallet will read from her new book titled Even When We Sleep and other poems 6:30-8 p.m. on the first floor of the Curtis Laws Wilson Library. Kallet is professor emerita of the University of Tennessee-Knoxville.