I graduated from university a couple of years ago, and though I skipped quite a few classes and was a master procrastinator, I still consider myself a bit of a nerd.  Mainly in the sense that I love reading and learning the how’s and why’s of the world, and if it’s in a rather interesting and accessible package, it’s like I’ve hit the jackpot.  That’s why I’m incredibly in love with Radiolab.  You can download (for free!) from the site or get the podcasts from iTunes.  There’s short ones and long ones, all well produced and thought-provoking.  Often, they take a theme and investigate and explain diverse and interesting ideas related to that theme in a way that feels like you’re just having a natural and intelligent conversation with a friend. Albeit, another nerdy friend.