Photograph by DIAN FOSSEY, NATIONAL GEOGRAPHIC CREATIVE In April trackers ... Mountain gorillas nurse their young for about three years, then mate and conceive yet again. Gicurasi, the 21-year ...

This story appears in the October 1971 issue of National Geographic magazine ... to protect themselves when attacked and to guard their young. But in some 3,000 hours of contact I encountered ...

A new National Geographic documentary explores her life ... with an issue devoted to the topic… Dian Fossey and Jane Goodall changed how we saw primates. These new movies change how we see ...