In his newest series, Mitch Epstein investigates permanence and impermanence by photographing rocks that last millions of years and clouds that evaporate before our eyes. These large-format black-and-white pictures, taken in New York City, examine society's complex relationship to nature, a theme Epstein has explored in previous work, such as his acclaimed tree pictures. "While laid up with a ruptured Achilles tendon, I wrestled with the passage of...