If we've learned anything in the tech world over the last decade, it's the folly of not taking the long view. So the start of a new decade seems like a good time to talk "big picture" with Lord Martin Rees, one of the world's most prominent scientists. His most recent book is called "On the Future: Prospects for Humanity." In a full-episode interview, Sir Martin and Nora don't just look decades ahead, but also millions of years into human future.