Colonel Mike Mullane

Career Astronaut & Author; Member of International Space Hall of Fame

Rebecca MacKinnon

Founding Director of Ranking Digital Rights

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Mikko Hypponen

Computer Security Expert; Chief Research Officer at WithSecure & Principal Research Advisor at F-Secure

If It's Smart, It's Vulnerable

Alex Steffen

Author of "Carbon Zero: Imagining Cities That Can Save the Planet"

Jeffrey Kluger

Journalist; Editor and Writer at TIME MAGAZINE. Author of 8 books, including APOLLO 13.

Yves Rossy

Military-Trained Pilot & Aviation Enthusiast

James Melton

Author, Pilot & Leadership Coach

Steven Squyres

Scientific Investigator, NASA

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

B. Gentry Lee

Chief Engineer for Solar System Exploration, Jet Propulsion Laboratory

Todd Kuiken

Biomedical Engineering Manager at the Rehabilitation Institute of Chicago

Justin Hall-Tipping

The Energy Evangelist, Justin Hall-Tipping works on nano-energy startups -- mastering the electron to create power.

José M. Hernández

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