As a freelance photographer for National Geographic magazine, Joel Sartore has produced more than 30 stories from around the world. He documents endangered species and landscapes in order to show a world worth saving. His latest monumental undertaking is National Geographic’s multi-year project, Photo Ark, with a simple goal — to create portraits of the world’s captive species before they disappear, and to inspire people everywhere to care. He has photographed over 5,000 species with a goal of reaching the 12,000 in captivity.