Caves of Oman. Deep in Arabia, scientists descend into some of the world’s largest caverns. Their mission: To see if tourists could one day explore Oman’s caves without putting their lives on the line

What’s New at Gombe. Forty-three years after Jane Goodall first set foot in the forests of Africa, Fifi is a mom again, Frodo is the alpha male, and Gremlin is teaching her twins to fish for termites

Walking the Chang Tang. In photographer Galen Rowell’s final assignment, four mountaineers set out for the remote calving grounds of the endangered Tibetan antelope