Jessica Matthews + Julia Silverman

Co-Founders of Uncharted Play, Inc.; Co-Inventors of the SOCCKET ball

Dan Meyer

Exploring the Way We Teach Teachers to Teach Kids

Rick Santorum

Former Member of the U.S. Senate

Mark Lynas

Environmental Writer; Author of "Our Final Warning: Six Degrees of Climate Emergency"

Louie Schwartzberg

Award-Winning Cinematographer, Director, Photographer and Filmmaker

Katie Stevens

Actress & Singer Known for "The Bold Type"

Fonzworth Bentley

Musician, Author and TV personality; MTV's "From G's to Gents"

John Sano

Former CIA Agent & Former Deputy Director of National Clandestine Service

Joshua Prince-Ramus

Architect & Principal of REX Design Firm

Amy Waldman

Journalist, Author, "The Submission"

Charlene Strong

Gay Rights Activist

Shantanu Sinha

Director of Product Management at Google; Co-Founder and Former President of Khan Academy

Tim Wise

Anti-Racist Essayist, Author & Educator; Expert on White Privilege & Advocate for Belonging

Charles Limb

Associate Professor of Otolaryngology-Head and Neck Surgery

LTG David Deptula

Dean of the Mitchell Institute of Aerospace Power Studies

Sasha Andreev

Actor, Emcee & Host of HGTV's "Curb Appeal"

Ahmed Hassan

Celebrity Landscaper & TV Host of DIY's Yard Crashers, Blog Cabin, Turf War

Dr. Holly G. Atkinson

Award-Winning Medical Journalist

Vilayanur Ramachandran

Neuroscientist; Director of the Center for Brain & Cognition, University of California, San Diego

Philip Zimbardo

Psychologist Known for the Notorious '1971 Stanford Prison Experiment;' Researcher of the Psychology of Heroism, Evilness and Time

Michelle Aguilar

Winner of NBC's "The Biggest Loser" Season 6, Author, Motivational Speaker

Streeter Seidell

Comedian, Writer for SNL & Contributor to CollegeHumor.com

Ali Vincent

First Female Winner of "The Biggest Loser"

Coach Ken Carter

Coach, Author, Educator & Inspiration for the Film "Coach Carter"

Spencer West

Inspirational Adventurist; Social Activist; Expert on Overcoming Stereotyping & Bullying

Spencer West

Dr. Jeffrey Bauer

Health Futurist, Author & Medical Economist

Scott Christopher

Work Culture Expert and Co-Author of The Levity Effect

LaDonna Gatlin

Singer & Author; Sister of the Legendary Country Music Group, The Gatlin Brothers

Michael C. Anthony

Bestselling Author, Body Language Expert & Kidney Disease Survivor

Chuck Hughes

Canadian Chef, Restaurateur, and Host on the Food Network & Cooking Channel