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Bemidji State University students in professor Jim McCracken's Impact of Technology class were assigned a group project. Each pair of students were given one sheet of polyester film and told to build a solar heater with recyclable materials that could heat a cup of water. The heaters were built in a variety of different shapes and sizes. Pictured is a solar heater designed by Jake Flaa, left, and Cody Schirmers. Pioneer Photo/Monte Draper

Creativity captures sunshine: BSU students showcase homemade miniature solar water heaters

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Bemidji State University professor Jim McCracken crouched down for a closer look at the disc-shaped contraption in front of him. It was painted black and topped with a reflective polyester film. Inside its funnel was an 8-ounce cup filled with water, held in pace by coiled wire.

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