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

Dan Roam

International Bestselling Author, The Back of the Napkin: Solving Problems and Selling Ideas with Pictures

Debbie Sterling

Tech Engineer & Founder and CEO of GoldieBlox; Advocate for Women in STEM

Don McMillan

Corporate Comedian Known for his 'Nerdy' Sense of Humor

George Elvin

Green Innovation Speaker & Author

James McLurkin

Roboticist, Inventor, Researcher & Teacher

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

Talks at GS with Keller Rinaudo Cliffton, CEO and Co-founder of ...

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Maria Bezaitis

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

Mikko Hypponen

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

If It's Smart, It's Vulnerable

Peter Norvig

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

Rebecca MacKinnon

Founding Director of Ranking Digital Rights