Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

José M. Hernández

Former NASA Astronaut, Engineer, Former Candidate for U.S. Congress & Author

Debbie Sterling

Tech Engineer & Founder and CEO of GoldieBlox; Advocate for Women in STEM

Deborah Berebichez

Data Scientist & Pioneer in Wireless Communications Technology; Founder & CEO of Solve For You

Tal Ben-Shahar

Best-Selling Author & Positive Psychology Expert

Danica McKellar

Mathematician, Writer, Actress, Author & Producer

Nick Bilton

New York Times Lead Technology Writer

Philippe Cousteau

Explorer, Social Entrepreneur & Environmental Advocate; Grandson of Captain Jacques-Yves Cousteau

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Barry Nalebuff

Milton Steinbach Professor of Management at Yale School of Managment, Co-Founder of Honest Tea & Chairman of KomBrewCha

John Amaechi

Organizational Psychologist, Leadership Transformation Expert & Former NBA Player

Peter Hirshberg

Pioneering Entrepreneur and Voice on Disruptive Culture and Technology; Chairman of the Re:imagine Group

John Zogby

Trendspotter & Leading Pollster

Brad Meltzer

Host of History Channel’s "Lost History" & "Brad Meltzer’s Decoded;" New York Times Best-Selling Author

Ginger Zee

Chief Meteorologist for ABC News, Author & Mental Health Advocate

Chasing Helicity: Through the Storm (The Chasing Helicity Series) (Chasing Helicity Ser...

Graham Hill

Founder of Life Edited & TreeHugger.com

Henry Blodget

Co-Founder, CEO, and Editor in Chief of "Business Insider"

Shaun Tomson

Former World Champion Surfer, Environmentalist & Motivational Speaker

James Woolsey

Former Director of the C.I.A.

Grant Achatz

Award-Winning Chef, Restaurateur & Cancer Survivor