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.
