Richard Bootzin speaks on "Sleep and Cognition" at noon in the Psychology building, Room 408.

Douglas Stone discusses "Shedding Light Through Chaos: Microlasers as Quantum Billiards" at 3 p.m. in the Physics and Atmospheric Sciences building, Room 224.

Tim Warburton leads a colloquium on "High-Order Unstructured Grid Methods for Time-Domain Electromagnetics" at 4 p.m. in the Math building, Room 501. Refreshments will be served at 3:30 p.m. in the Math building, Room 401N.

The International Arts Society Film Series shows "Les Infants du Paradis" at 7:30 p.m. in the Modern Languages building auditorium.