Calendar

ALL WEEK Chronic Fatigue Syndrome awareness The Boston Public Library, 700 Boylston St., will feature "The Faces of Chronic Fatigue Syndrome," a photo exhibit of patients with the syndrome, including some from the Boston area. Go to cfids.org/cfs.

MONDAY, TUESDAY, JULY 16-17 Heart screenings The Norwood Youth Football and Cheer teams will sponsor heart-screening sessions, from 10 a.m. to 6 p.m. in the Norwood Recreation Center, 165 Nahatan St. Costs are $49 for children under 18, and $69 for adults. Pre-register at 866-722-8008 or heartscreenamerica.com .

WEDNESDAY, JULY 18 Human evolution The Broad Institute's summer genomic research lecture series continues with a discussion about the crucial changes human DNA has experienced throughout its evolution . At 6 p.m. at the Broad's 7 Cambridge Center building in Kendall Square. Go to broad.mit.edu/outreach/midsummer.

THURSDAY, JULY 19 Water conservation The Pioneer Institute for Public Policy Research and the Environmental Business Council will hold a panel discussion on water conservation at Suffolk University Law School, 120 Tremont St. From 8:30 to 10:30 a.m. Call 617-723-2277 .

Events may be sent to healthscience@globe.com.