You can download Science Friday and listen to it on your own time. Using free software, you can automatically download the latest show and listen to it on your computer's audio players, including iTunes and Windows Media Player, or on your portable .mp3 player.
Volume: 4-7 files per week, approx 90 minutes total
Subscription address: http://www.sciencefriday.com/audio/scifriaudio.xml
Like listening to Science Friday? Try our video podcast. We're creating and collecting science videos of all kinds--from spider-milking demonstrations to studio interviews with Ira.
Volume: 4 files per month, 2-5 minutes each
Subscription address: http://www.sciencefriday.com/video/scifrivideo.xml