ART WOLFE's stunning images are recognized throughout the world for their mastery of color, composition, and perspective. Wolfe is a recipient of the Photographic Society of America's Progress Medal and the coveted Alfred Eisenstaedt Magazine Photography Award, as well as a Lifetime Achievement award by the North American Nature Photography Association. Wolfe's television series, Art Wolfe's Travels to the Edge, airs on PBS stations throughout the country. He is also a popular speaker for such companies as Microsoft, IBM, and Sheraton Hotels. He can be found at artwolfe.com as well as on Facebook and Twitter. MARTHA HILL is a freelance writer and the former photo editor of Audubon magazine. TIM GREY is regarded as one of the top educators in digital imaging, having written more than a dozen books and hundreds of articles. He can be found at timgrey.com.