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Cambridge Science Festival, by the numbers

Scientists love numbers. Sometimes those digits are inconceivable for those of us who have enough trouble figuring out the tip on a dinner check. But an expert who’s passionate and patient can make it seem as simple as 1-2-3. Or at least 3.1415. . . . (Piece of pi, right?)

The seventh Cambridge Science Festival runs Friday through April 21, bringing knowledge to more than 50 sites in Cambridge, Boston, and surrounding towns, with 141 events and activities involving 130 local science organizations. How’s that for numbers?

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