From the issue: "Blue Mesa, one of numerous points of interest in the 93,492-acre Petrified Forest National Park, invites visitors to a forgotten time when dinosaurs ruled the earth. Agatized logs, all that remain of ancient trees, testify to dramatic changes over the ages." Photo by Willard Clay. (The inside of the issue includes several Petrified Forest photos by Jeff Kida, who's now our photo editor.)