Sarah Brosnan

Primatologist; Professor of Psychology, Philosophy & Neuroscience at Georgia State University

Brian Hare

Co-founder of Dognition & Associate Professor of Evolutionary Anthropology at Duke University, Author of "The Genius of Dogs"

Peter B. de Menocal

President & Director of Woods Hole Oceanographic Institution; Professor, Department of Earth and Environmental Sciences Columbia University

Peter de Menocal on Ocean Solutions for a Warming Planet

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Anton Musgrave

Joint CEO FutureWorld SA and Partner FutureWorld International.

Keith Murnighan

Distinguished Professor, Kellogg School of Management; Author, Do Nothing, How to Stop Overmanaging and Become a Great Leader.

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Lamman Rucker

Actor, Education Activist, Green Living Advocate & Entrepreneur

Jenna Marbles

YouTube Sensation

Sophia Bush

Actress, Humanitarian & Author

David Brody

Interviewing America's Newsmakers

Olivia Munn

Television & Film Actress; Known for "Newsroom" & "X-Men: Apocalypse"

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Jarod Miller

Naturalist, Zoologist & Television Host

Karen Litzinger

Business etiquette trainer/keynote and career coach with a side passion as a pet loss counselor and author

Kesha

Pop Singer Known For "Tik Tok," "Your Love Is My Drug" & "Praying"

Maggie Q

TV & Film Actress, Known for Lead Role in CW's "Nikita"

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Jason Biggs

Actor Known For His Roles in the "American Pie" Series and on "Orange Is The New Black" Among Others

Vandana Shiva

World-Renowned Environmental Leader