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    Science center’s leader retires


    Martha Twigg, director of the South Shore Natural Science Center for 16 years, has retired. Her innovative contributions, such as the creation of EcoZone - an exhibit on local ecosystems, including wetlands, woodlands, and meadows - were celebrated last weekend at an open house attended by more than 200 people. Twigg, 68, is credited with drawing a diverse range of people to the center, which marks its 50th anniversary this year. - Meg Murphy