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  • Handmade boats bring citizen science to the Mystic River

    BetaBoston - 09/16/2015

    One tool, the Thermal Fishing Bob, links a temperature sensor to lights inside a waterproof container. Northeastern University student Erik Hanley demonstrated how it works. The lights turn from blue to green to red as the temperature goes from cool to warm. Dunked in a river, the bob’s changing colors can indicate a warm area where a power plant dumps wastewater, for example. The Public Lab has taken time-lapse photos of the bobs moving through water at night, creating rainbow-colored ribbons that show how this wastewater dissipates. “It’s very cool to be able to paint the environmental data,” Hanley said.

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