Health/Science calendar

Anxiety on film Coolidge Corner Theatre will screen Alfred Hitchcock's "Vertigo" (above) as part of its Science on Screen series. Psychoanalyst and psychiatrist Catherine Kimble discusses vertigo and anxiety. General admission $9.75. At 7 p.m., Coolidge Corner Theatre. Go to coolidge.org/science.

Oil and food Richard Heinberg, author and senior fellow at the Post-Carbon Institute, an environmental advocacy group, will talk about the end of cheap oil availability and its effect on agriculture and food supplies. At 7 p.m., First Parish-Unitarian Church, 50 Church St., Waltham. Go to richardheinberg.com.

Car of the future NOVA examines green technology in the automotive industry. Features MIT professor and students who attempt to save energy by improving engine performance. 8 p.m., WGBH 2. Go to wgbh.org.

Human chimeras? An ethics lecture will address the possibility of modifying human genes with the genes of another animal, which would give people enhanced physical capabilities, but also carry severe risks. 6:30 p.m., Hauser Hall 105, Harvard Law School. Call 617-496-4662.

The governor's Earth Day Governor Deval Patrick will make a public address about his vision for the future of clean energy in Massachusetts. From 4:15 to 5:30 p.m., MIT Kresge Auditorium, 48 Massachusetts Ave., Cambridge.

Ocean floor explored Deborah Smith of the Woods Hole Oceanographic Institute will discuss how the ocean's crust forms and evolves to shape the face of the planet. 6 p.m. reception, 7 p.m. lecture. MERI Center for Marine Studies, 55 Main St., Blue Hill, Maine. Go to meriresearch.org.

Free cancer screening Massachusetts Eye and Ear Infirmary will provide free head and neck cancer screening. From 9 a.m. to 3 p.m., Massachusetts Eye and Ear Infirmary, 11th floor, 243 Charles St. For reservations call 617-573-4084.

Earth Day extravaganza New England Wild Flower Society will hold an Earth Day celebration featuring guided tours of the Garden in the Woods, a scavenger hunt, and tips for green living. From 10 a.m. to 4 p.m., at Garden in the Woods, 180 Hemenway Rd., in Framingham. Go to newenglandwild.org or call 508-877-7630.

Festival of science The Cambridge Science Festival (exhibit from last year, above) will provide a week's worth of science fun. More than 200 events, including lunches with Nobel laureates, rocket building, yeast experiments, concerts, exhibits, and workshops. For complete schedule, go to cambridgesciencefestival.org.

Events may be sent to healthscience@globe.com.