Perez Hilton

Popular Celebrity Gossip Blogger; Podcast Host, YouTuber & Owner of "My True 10"

Margaret Wertheim

Co-Creator, Crochet Reef; Science Writer

Lawrence Krauss

Theoretical Physicist, Author & Professor

Alfie Kohn

Author & Speaker on Human Behavior, Education, & Parenting; Outspoken Critic of Education's Fixation on Grades

Urvashi Rangan

Chief Science Advisor for the GRACE Communications Foundation & Former Executive of Food Safety & Sustainability at Consumer Reports

Nina Planck

Author of "Real Food: What to Eat and Why"

Dr. Gary Small

Expert on the Brain, Memory and Aging

Jeffrey Israel

Author & Jewish Studies Professor at Williams College

Ted Gonder

Executive Director & Co-Founder of Moneythink

Mark Zandi

Chief Economist of Moody's Analytics; Co-Founder of Economy.com

Khoi Vinh

Senior Director of Design at Adobe & Former Design Director for The New York Times

Dr. Francis Collins

Head, Molecular Genetics Section, National Human Genome Research Institute; 16th Director, National Institutes of Health

Dr. Francis Collins: "I don't see a conflict" between science and faith ...

James Kakalios

Author of "The Physics of Superheroes"; Professor of Physics, University of Minnesota

Nadine Strossen

Professor of Law; President, American Civil Liberties Union (1991-2008)

Marina Adshade

Author of "Dollars and Sex: How Economics Influences Sex and Love"

Lenore Skenazy

Host of "World's Worst Mom" on Discovery Life; President of Let Grow & Founder of the Free-Range Kids Movement

Gregg Behr

Founder & Co-Chair of Remake Learning

Sivan Ya'ari

Founder and CEO, Innovation Africa

Jack Kornfield

Vipassana Meditation Teacher, Author, & Co-Founder of Spirit Rock Meditation Center

Saadia Zahidi

Member of Executive Committee & Head of Education; Gender & Employment Initiatives; World Economic Forum