Carleton University Biologist Grégory Bulté, is using 3D printing to answer a question that’s been bugging him for more than a decade. Bulté studies northern map turtles, whose females can grow to twice the length of males. He wondered whether males might be attracted to larger females, but the turtles’ skittish nature—and the fact that they mate on the floor of the lake—made observation tricky.

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