150 Years of Change: How Old Photos, Recaptured, Reveal a Shifting Climate

For 30 miles we bounce along a dirt road in southwestern Wyoming, heading toward a jagged skyline. It’s early September and the aspens are starting to turn yellow. As we climb toward the mountains, the air grows colder. Soon the road will see snowfall.Jeff Munroe, a professor of geology at Middlebury College in Vermont, is taking us back in time. Our small group of scientists and adventurers will be backpacking…