TUEs., MARch 4
Flies and fish The Radcliffe Institute will hold a lecture by Nobel Prize-winning German biologist Christiane Nüsslein-Volhard about the origin of vertebrates. At 4:15 p.m., Lecture Hall D, Science Center, 1 Oxford St. Call 617-495-8600.
WEDS., MARch 5
Fold, unfold Radcliffe Fellow Susan Lindquist will present her work on protein folding and evolution, as part of the Radcliffe Institute Fellow's Presentation Series. At 3:30 p.m., second-floor Colloquium Room, Radcliffe Institute, 34 Concord Ave. Call 617-495-8212.
Mini med-school Harvard Medical School will hold its first "mini-med school" class of the year, aimed at helping explain how to distinguish mood disorders and clinical depression from the ups and downs of daily life. From 5:30 to 7 p.m., in the school's Joseph B. Martin Conference Center, 77 Avenue Louis Pasteur. To register, go to hms.harvard.edu/public/longwood/longwood.html or call 617-432-3038.
THURS., MARch 6
Hobbits in the haystack The Peabody Museum of Archaeology and Ethnology at Harvard will host a lecture about how the fossils of the small-bodied, small-brained species homo floresiensis are challenging our understanding of evolution. At 5:30 p.m., in the Geological Lecture Hall, 24 Oxford St., Cambridge. Go to peabody.harvard.edu.
Sleep-working Emerson Hospital will host a discussion about the relationship between sleep disorders and workplace performance. From 6 to 8:30 p.m., in the hospital's North Assembly Room, 133 Old Road to Nine Acre Corner, Concord. Go to neurocareinc.com.
FRI., MARch 7
Happy, happier, happiest Harvard lecturer Tal Ben-Shahar will talk about his best-seller, "Happier," which offers advice on how to boost the enjoyment you get out of life. At 7 p.m., at the Harvard Coop, 1400 Massachusetts Ave., Cambridge. Go to harvard.bkstore.com.
Earth's origins The Radcliffe Institute will present an all-day science symposium about the origins of the Earth, solar system, and beyond. From 9 a.m. to 4:30 p.m., Radcliffe Gymnasium, 10 Garden St. Call 617-495-8600.
SAT., MARch 8 International women's day The Longwood Symphony Orchestra will celebrate international women's day with a concert and a free health symposium about women's health issues, in collaboration with Harvard Medical School. The symposium runs from 2 to 5 p.m., at the medical school's Joseph B. Martin Conference Center, 77 Avenue Louis Pasteur. To register, e-mail longwoodsymphony@gmail.com. Fossil fest The Harvard Museum of Natural History will host a family-oriented day of exploration of dinosaurs, ice age mammals and other prehistoric beasts. From 11 a.m. to 5 p.m. Includes a screening of the new WGBH NOVA documentary "The Four-Winged Dinosaur," at noon. At e museum, 26 Oxford St., Cambridge. Go to hmnh.harvard.edu. Health reform in Spanish Health Care For All and Neighborhood Health Plan will hold a bilingual session to discuss Massachusetts's health insurance reform efforts and how to avoid penalties of not being covered. Childcare will be provided. From 11 a.m. to 2 p.m., at La Alianza Hispana, 409 Dudley St., Roxbury. Call 617-427-7175 ext. 298 or e-mail taravena@laalianza.org.
Sat., March 8 and Sun., March 9
Underwater adventures The Boston Sea Rovers will hold their 54th Annual Underwater Clinic, featuring more than 40 seminars about scuba diving and the marine environment. At the Fairmont Copley Plaza Hotel, St. James Avenue. Saturday evening film festival at the nearby John Hancock Hall. General admission $25 Saturday, $20 Sunday, and $25 for the film festival. Go to bostonsearovers.com. Events may be sent to healthscience@globe.com.
