Phaedra Parks

Producer, Entertainment Attorney & Cast Member of Bravo's "The Real Housewives of Atlanta"

Vilayanur Ramachandran

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

Deborah Roberts

ABC News Network Correspondent; Author, "Been There, Done That: Family Wisdom For Modern Times"

Anthony Atala

Director, Wake Forest Institute for Regenerative Medicine

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

Bill Kurtis

TV Journalist, Producer, Narrator and News Anchor; Host of A&E's "Investigative Reports," "American Justice" and "Cold Case Files"

Dr. Lisa Masterson

OB/GYN, Mom, Philanthropist & Author; Known as Co-Host of "The Doctors"

Michael C. Anthony

Bestselling Author, Body Language Expert & Kidney Disease Survivor

Tony Horton

Fitness Expert & Founder of Fitness Program P90X

Crush It!: The Revolutionary Fitness Plan for All Levels That Burns Fat, Builds Muscle,...

Richard Resnick

CEO of Cureatr

Gail Wilensky

Economist, Healthcare Policy Reform Expert & Senior Fellow at Project Hope

Rick Harrison

Co-Owner of the World Famous Gold & Silver Pawn Shop; Featured on "Pawn Stars"; Epilepsy Awareness Advocate

Darcy Winslow

Former Nike Global Sustainability Guru and Managing Partner at The Academy for Systemic Change

Jeff Arnold

CEO & Chairman of Sharecare; Former CEO of Howstuffworks and WebMD Corporation