Jennifer Pharr Davis

Long-Distance Hiker & Author; Overall Record Holder on the Appalachian Trail & The First Woman to Set That Mark

Outdoor School: Hiking and Camping: The Definitive Interactive Nature Guide

Dr. Tierney Thys

Marine Biologist, Educator & Filmmaker

David Doubilet

National Geographic Photographer & Founding Member of the International League of Conservation Photographers

Chad Pregracke

Founder of Living Lands & Waters, CNN's Hero of the Year for 2013, Environmental Speaker & Bestselling Author

Brian Skerry

National Geographic Magazine Photographer, Specializing in Marine Wildlife & the Underwater World; Exploration & Conservation Speaker

Andrés Ruzo

Geothermal Scientist & Amazon Conservationist

Barton Seaver

Celebrity Chef, Author & Sustainable Food Advocate; National Geographic Fellow; Ocean Conservationist

Christopher Elliott

Reader Advocate and Columnist for National Geographic Traveler

Aziz Abu Sarah

National Geographic Explorer, Cultural Educator & Peace Activist

Mark Moffett

Entomologist, Nature Photographer & Author

Hazen Audel

Adventurer, Biologist & Survival Expert

Primal Survivor | Asli Khatra, Asli Hero

Losang Rabgey

Feminist, Social Innovator, Nonprofit Leader & Expert in Ethical Leadership

Dr. Enric Sala

Marine Ecologist & Explorer-In-Residence at National Geographic Society

Charles Graeber

Award-Winning International Journalist & Author of the Bestselling True Crime Book, "The Good Nurse"

Doug Allan

Award-Winning Natural History Photographer & Documentary Filmmaker

Karen Kasmauski

Former National Geographic Photographer, Documentary Filmmaker & Professor

Kakenya Ntaiya

Kenyan Educator, Feminist & Social Activist

Wade Davis

Anthropologist, Explorer and Photographer; Explorer-in-Residence, National Geographic Society

Lucy Cooke

Zoologist, TV Producer & Bestselling Author

Mireya Mayor

Primatologist, Wildlife Conservation Advocate, Author & TV Host