Handmade Boats Bring Citizen Science to the Mystic River

From The Boston Globe‘s betaBoston blog:

“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.”

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