ADVANCE FOR WEEKEND EDITIONS - In this Thursday, Dec. 8, 2016, photo, Stephen Mackessy, center, a professor at the University of Northern Colorado, and Graham Dawson talk in one of the school's laboratories in in Greeley, Colo. Mackessy and his team of student researchers have captured snakes in the area of the solar farm, tagged the creatures and released them to see how the snakes are faring near human developments. (Jenny Sparks/Loveland Reporter-Herald via AP)
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