• Horse Day Symposium -- Oct. 7, UC Davis Main Theatre. Wild horses -- their behavior, biology and population management -- will be explored by researcher and guest speaker Jay F. Kirkpatrick at 9 a.m. and 2:30 p.m. Also, tour the UC Davis Veterinary Medical Teaching Hospital and the California Center for Equine Health and Performance at 4:30 p.m. Media contact: Horse Day coordinator Shannon Fox, (916) 752-1250. • Storer Life Sciences Lectures -- Oct. 16 & 18, UC Davis. Peter T. Ellison, chair of the Harvard University anthropology department, will lecture on "Ecology and Human Fecundity" (Monday) and "Ecology and the Human Ovary" (Wednesday). Both talks begin at 4:10 p.m. in 180 Med Sci Bldg. C. Media contact: Susan Shideler, biological sciences, (916) 752-2096. • Major Issues In Modern Biology Lecture -- Oct. 18, UC Davis. Claude Hannoun, a professor from the Institut Pasteur, will give a public lecture entitled "The Legacy of Louis Pasteur," commemorating the 100th anniversary of the famous scientist's death. The lecture begins at 4:10 p.m. in 180 Med Sci Bldg. C. Media contact: Linda Bisson, viticulture and enology, (916) 752-1717. • Open House, Advanced Light Source -- Oct. 28, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, Calif. Among others, UC Davis physicist Chuck Fadley and his students will be on hand 10 a.m. to 3 p.m. to explain how X-ray spectroscopy will be used to fashion nanochips -- the next generation of computer chips that will be a thousand times smaller than today's microchips. Media contact: Lynn Yarris, (510) 486-5375.