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Presque Isle Middle School students Carter Blackstone (left) and Jackson Smith mix milk into a test medium to test for lactose intolerance. The activity was part of STEM Day for 120 eighth-graders at the University of Maine at Presque Isle on May 15. (Paula Brewer | The County)

Students get hands-on with UMPI STEM Day

Students from Presque Isle Middle School converged on the campus to explore different kinds of science up close.

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