Sunrise through Mesa Arch in Canyonlands National Park, outside Moab. To get this shot, Tim slept on the canyon rim the night before and was in position by 4:30am — before the other photographers arrived to jostle for the same few feet of ground. Far below the arch, in the ancient canyon floor, uranium mines once worked the same sandstone that took three hundred million years to form. The Colorado Plateau doesn't negotiate. It only offers this: the light, once, briefly, and never twice the same.