David Keith studies our climate, and the many ideas we've come up with to fix it. A wildly original thinker, he challenges us to look at climate solutions that may seem daring, sometimes even shocking.
Aaswath Raman is a scientist passionate about harnessing new sources of energy, mitigating climate change and more intelligently understanding the world around us -- by better manipulating light and heat using nanoscale materials.
Amy Smith designs cheap, practical fixes for tough problems in developing countries. Among her many accomplishments, the MIT engineer received a MacArthur "genius" grant in 2004 and was the first woman to win the Lemelson-MIT Prize for turning her ideas into inventions.
Jedidah Isler studies blazars — supermassive hyperactive black holes that emit powerful jet streams. They are the universe’s most efficient particle accelerators, transferring energy throughout galaxies.
Brian Greene is perhaps the best-known proponent of superstring theory, the idea that minuscule strands of energy vibrating in a higher dimensional space-time create every particle and force in the universe.
Astronomer Clifford Stoll helped to capture a notorious KGB hacker back in the infancy of the Internet. His agile mind continues to lead him down new paths -- from education and techno-skepticism to the making of zero-volume bottles.
Britain's former prime minister Gordon Brown played a key role in shaping the G20 nations' response to the world's financial crisis, and was a powerful advocate for a coordinated global response to problems such as climate change, poverty and social justice.
David is founder and CEO of The Plastic Bank, the world’s only organization to monetize plastic waste and provide an opportunity for the world's disadvantaged to collect and trade plastic waste as a currency.