Highlights from the third day of the AAAS Annual Meeting:

Repairing Our DNA: Bridging Molecular Mechanism and Human Health, a symposium. 8:30-10:00 a.m., San Diego Convention Center, Room 17A.

Traffic, Crowds, and Society, a symposium. 8:30-10:00 a.m., San Diego Convention Center, Room 11B.

Marine Spatial Planning: A New Approach for Balancing Ocean Uses and Ecosystem Health, a seminar. 8:30-11:30 a.m., San Diego Convention Center, Room 17B.

Family Science Days and Meet the Scientists Series. 11:00 a.m.-5:00 p.m., San Diego Convention Center, Exhibit Hall B1.

Understanding Earthquakes Through Large-Scale Simulations, a topical lecture by Thomas Hillman Jordan, W.M. Keck Professor of Earth Sciences, University of Southern California, Los Angeles. 12:30 -1:15 p.m., San Diego Convention Center, Room 6D.

Targeting HIV/AIDS Prevention: New Research and Future Avenues, a symposium. 1:30-3:00 p.m., San Diego Convention Center, 6E.

Improving Oral Health: Smiles for Life, a symposium. 3:30-5:00 p.m., San Diego Convention Center, Room 6D.

AAAS Awards Ceremony and Reception. 5:00-6:30 p.m., San Diego Convention Center, Room 6C.

Science and Technology in the First Year of the New Administration, a plenary lecture by Eric S. Lander, director, The Broad Institute of MIT and Harvard University, and co-chair, President's Council of Advisors on Science and Technology. 6:30-7:30 p.m., San Diego Convention Center, Room 6AB.

See Saturday's schedule online or beginning on page 18 of the program book.