The Scientific American Podcast is a weekly science audio show covering the latest in the world of science and technology. Join host Steve Mirsky each week as he explores cutting-edge breakthroughs and controversial issues with leading scientists and journalists. He is also an articles editor and columnist at Scientific American magazine, and his column, "Antigravity", is one of science writing's rare venues for humor. Check out the new daily podcast from Scientific American: "60 Second Science." To view all of our archived podcasts please go to www.sciam.com/podcast