In this photo taken Nov. 29, 2018, from left, Kevin McKelvey, Thomas Franklin and Jessie Golding stand in the National Genomics Center for Wildlife and Fish Conservation in Missoula, Mont. A paw print in the snow contains enough genetic clues to identify the animal that made it, even if the track has been buried for five months. That discovery may revolutionize and simplify wildlife monitoring in remote places. (Tom Bauer/The Missoulian via AP)