Alex Steffen

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

Anna Dietrich

‎Entrepreneur; Consultant; Speaker; COO & Co-Founder of Terrafugia, Inc.

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Bernie Krause

Natural sounds legend; records the sounds of endangered biospheres.

Carlo Ratti

Architect & Engineer; Director of MIT's SENSEable City Lab; Founding Partner of Carlo Ratti Associati

Catherine Mohr

Vice President of Strategy at Intuitive Surgical & President of the Intuitive Foundation; Medical Tech Start-Up Advisor

Don McMillan

Comedian

George Elvin

Green Innovation Speaker & Author

James McLurkin

Roboticist, Inventor, Researcher & Teacher

James McLurkin and his robot swarm

Jeffrey Kluger

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

José M. Hernández

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

Justin Hall-Tipping

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

Keller Rinaudo

Co-founder and CEO of Zipline

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

NASA astronaut Leland Melvin teaches kids about Webb telescope ...

Maria Bezaitis

Intel Fellow, Chief Architect of Socio-Technical Systems & Expert on Technology Innovation

Mikko Hypponen

Computer Security Expert & Chief Research Officer for F-Secure

Peter Norvig

Computer Scientist, Expert on Artificial Intelligence and the Director of Research at Google Inc.

Rebecca MacKinnon

Founding Director of Ranking Digital Rights

Steven Squyres

Scientific Investigator, NASA

Tim O'Reilly

Founder & CEO of O'Reilly Media