Onward: Hawaii Botanist Races to Save Rare Plants

Botanist Steve Perlman has spent so much time among Hawaii's plants that losing one feels like losing a family member. He's racing to save rare plants in what he has dubbed the "extinction capital of the world."

Read more about Steve Perlman and his work:

Onward is a project to explore the world and share its untold stories. Hit the road with National Geographic multimedia journalists Spencer Millsap and Dan Stone at http://onward.nationalgeographic.com, or tweet them at @spono and @danenroute to join the conversation.