It’s 7:00PM. Matt Goode throws equipment into his pick-up truck and heads to a Tucson golf course. No, he isn’t going to play golf, far from it. The University of Arizona scientist will spend the night chasing rattlesnakes to find out what they do after the sun sets. With a headlamp strapped to his forehead, Goode searches grassy fairways and thick prickly-pear cactus patches for tiger rattlesnakes.