SATURDAY'S COMMUNITY CALENDAR

Exhibit Opening "Arctic Adventure," takes visitors to the fascinating (and cold!) world of the Arctic through interactive and artifact-based exhibit components and audiovisual experiences. This exhibit explores the unique nature of our planet's polar regions and the life that they support, through Sept. 4. $12; seniors, college students and children ages 3-18, $8; children 2 and younger, free. Hours: 10 a.m.-5 p.m. Tuesday-Saturday; noon-5 p.m. Sunday. EcoTarium, 222 Harrington Way, Worcester. (508) 929-2700 or www.ecotarium.org . Worcester Jazz Jam 2 p.m. Saturdays. Nu Caf, 335 Chandler St., Worcester. (508) 926-8800. Safe Boating Class Meets all sta

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