http://www.pbs.org/wgbh/nova/rss/podcast/redir/http://www-tc.pbs.org/wgbh/nova/rss/media/nsn_a_pod_cosmic401_090629a.mp3 Cosmic Perspective: Carbon http://www.pbs.org/wgbh/nova/rss/podcast/redir/http://www-tc.pbs.org/wgbh/nova/rss/media/nsn_a_pod_cosmic401_090629a.mp3 2009-06-29 http://www.pbs.org/wgbh/nova/rss/media/logo-nova-podcast-2.jpg