The Takeaway host John Hockenberry spoke Friday at TED2012 in Long Beach, California.

Design has always been a part of Hockenberry's life. His father, who was a designer for IBM and Kodak, taught him what good design looked like.

Every year, the TED Conference in California brings together the most prominent thinkers, innovators and newsmakers to share their big ideas. This year Takeaway host John Hockenberry took the stage. But he also recorded some behind-the-scenes interviews with some of TED's biggest names.

Before every new technology there comes the moment of invention. Before there was ethanol, someone had to look at biomass and say, "There's energy in them thar leaves." For the last day of our Power Trip energy series, venture capitalist Vinod Khosla joins The Takeaway from the TED conference in Long Beach, California. Khosla, whose company risks millions of dollars every year to fund upstart energy technologies, ruminates on creating billion dollar industries out of wild ideas.

Bill Gates, Microsoft founder and philanthropist, addressed the crowd at this year's TED conference with his thoughts on saving the world with a new kind of philanthropy. It's long, but funny. Really.