Dr. Joseph Miller explains "Why Can't I See at Night?" as part of the Biomedical Engineering Seminar Series at 1:30 p.m. in the Arizona Health Sciences Center, Room 5403.

John Hildebrand speaks on "Explorations of a Model Olfactory System" at 4 p.m. in the Life Sciences North building, Room 452.

Free Your Back! Awareness Through Movement offers Feldenkrais lessons at 5 p.m. in the University Medical Center Wellness Center, Room 2823, every Monday. There is a $6 charge per session.

Peter Wehinger speaks on "The Highest Observatory on Earth" at 7:30 p.m. in the Steward Observatory, Room N210.