By Tommy Andres, CNN
(CNN) – Remember a few months ago, when the price of gas was the hottest topic on the campaign trail? That's when President Obama renewed his call for alternative fuels and Newt Gingrich pushed the party’s “drill, baby, drill” message. Now gas prices have fallen again and the GOP has chosen its candidate.
"We are greener when it's cheaper to be so, and when it's not we're not," says Ryan Adolphson, a former alternative energy adviser to President George W. Bush. [3:36]
So, with the smoke from the political battle temporarily cleared, CNN's Tommy Andres taps some experts to find out just how far away algae fuel is from powering America’s cars.
By Chip Grabow, CNN
(CNN) - Is there a cure for writer's block? Where do "creative people" get their ideas? Is "brainstorming" effective?
At the start of any creative endeavor each of us at one time or another has faced the equivalent of a writer's blank page. We patiently wait for some kind of inspiration to get the juices flowing. But how can we pull in good ideas? And what's the best way to deal with writer's block?
Science writer Jonah Lehrer tackles these questions in his book, "Imagine: How Creativity Works."
Highlights from the podcast:
Lehrer on when our best ideas arrive: "It's in that feeling of intense frustration, when you really are ready to quit, and sometimes even have quit, that is when your best ideas arrive." [3:54]
Lehrer on the importance of downtime: "Einstein's got this great line, he says, creativity is the residue of wasted time. I think we all need to make time to waste time." [5:27]
On the importance of our social networks: "As Steve Jobs once put it, creativity is just connecting things. And it turns out most of those connections come from other people." [15:44]
Editor's note: This story was originally published in June. Jonah Lehrer has since admitted to fabricating certain quotes from Bob Dylan in his book about creativity, Imagine. His publisher has pulled the book from stores and Lehrer has resigned his position at The New Yorker magazine. You can hear more about that story here.