“Sometimes I feel like I’ve chosen the most difficult thing in the world to study,” Cheryl Knott tells me as we sit beneath the rain forest canopy at her orangutan research station in ...

While 31-year-old orangutan Tua cuddles and hugs her newborn, the Philadelphia Zoo is celebrating the new addition to this critically endangered species’ population. The Sumatran orangutan ...

Biological anthropologist Cheryl Knott and photojournalist Tim Laman have dedicated their lives to the orangutans of Borneo’s Gunung Palung National Park. Together with their children ...