There are a lot of people out there talking physics and some of them are doing it on podcasts, which allow you to download them for listening at your convenience. We maintain a list of some of the more interesting science podcasts, which often feature cutting edge physics topics like dark energy or string theory.
There are a lot of podcasts that focus on science in general, or specifically focus on physics. If you've never listened to podcasts before, there are a variety of services available to listen to podcasts. The most popular is iTunes, of course, but there are many other services, such as Google Listen for Android platforms and Stitcher radio. For more information on how to subscribe to podcasts, check out the About.com Podcasting article "How to Listen to Podcasts." Most of these podcast programs are available through these different listening streams, so you can pick whichever one is most convenient with your technology.
NPR's Science Friday podcast
Every week on NPR, Ira Flatow hosts the two-hour Science Friday program, which delves deeply into some of the most relevant science topics of the day. This radio show is available - broken into two one-hour segments - as a weekly podcast. Flatow conducts regular interviews with prominent scientists to discuss the details behind the science and technology headlines that are of most interest to us all.Science magazine podcast
Science magazine also has a podcast, covering some of the most prominent topics from this journal of the American Association for the Advancement of Science. Science covers a wide range of science topics, and the podcast does as well.Nature podcast
The prominent scientific journal Nature also has a podcast that covers the scientific topics which fall within its pages. In addition to the regular, lengthier podcast, this includes various shorter extras. They also publish readings from the "Futures" series of science fiction stories.Science Fantastic with Michio Kaku
This is marketed as one of the most widely-syndicated scientific programs, hosted by Michio Kaku. Since Dr. Kaku is a theoretical physicist, the show does focus primarily on physics topics, but he does often branch out into other areas of science as he sees fit.I have to admit that I'm biased on this one, because I've actually appeared on the Science Fantastic with Michio Kaku radio program. Back in January of 2010, Dr. Kaku had me on the show to discuss my book String Theory For Dummies.

