I recently finished reading a pre-release copy of Esquire editor A.J. Jacobs’ wonderful upcoming book The Know-it-All, which, in short, follows Jacobs – concerned that he’s become steadily stupider over the decade since graduating college – on a quest to counter that trend by reading the Encyclopaedia Britannica, cover to cover. The Know-it-All is a surprisingly absorbing read, beautifully blending lessons Jacobs pulls directly from the volumes with the day-to-day impact his quest has on the rest of his life, on his relationships with his wife, colleagues, family and friends.

I enjoyed the book immensely, though I must admit it also brought forth from the back of my mind a similar fear of slow decline since a collegiate thinking peak. These days, I’m thrust into situations that make me think, and think hard, just often enough to remind me that I don’t think hard nearly as often as I should.

I blame that, in large part, on no longer owning a car. Or, to be more precise, on no longer owning a car radio.

I’ve never been a big radio listener outside of the driver’s seat, but, on the road, throughout high school and college, NPR almost never left my radio dial. With each short drive, I’d pick up a small dose of Fresh Air, the World, Marketplace or All Things Considered, any of which never ceased to occupy my imagination.

Certainly, I knew full well that, as a teenage guy, listening to NPR lifted me to nearly unparalleled levels of dorkdom. But I didn’t care. I loved it. I could almost physically feel my brain filling up with new facts and ideas, delivered fresh each day over the airwaves.

In standard New York style, however, I sold my car before moving to the city, and with it the only radio I owned. That was the end of NPR for me, save for short trips out west, when, in cars rented or borrowed, Terry Gross and Bob Edwards once again brought me up to date on the world. I knew that I could theoretically find any of those programs at home, archived online, but, frankly, I was too lazy to do so – I wanted my information pushed, not pulled.

Then, a day or two back, I downloaded a copy of iTunes. I did it mainly because, starting at the end of next week, I’ll be working part-time on a borrowed Mac for a nonprofit consulting project. And, with my trusty Dell laptop slowly disintegrating, I’ve also been toying with the idea of making the Mac switch full-time, trading my Dell for a Powerbook G4 and returning to my Apple roots. I downloaded the Windows version of iTunes as a baby step in that direction, a chance to ease my way into the rounded corners and aqua blues of the Mac world.

Overall, I’ve been fairly impressed with the program. But I was ecstatic about it this afternoon, when I clicked on down to the Radio icon in the left sidebar, just to see what was in there. Ambient, Americana… then, about two-thirds the way through the list: Public.

I clicked. Lo and behold, a veritable cavalcade of NPR stations! I recognized the third on the list, KCRW, from my LA rental car driving, and hit the play button. Instantly: Cory Flintoff, at 128 kilobits per second.

I am not too proud to admit I literally jumped around the room. By another miracle of broadband, NPR will, once again, be flowing back into my brain. Which, frankly, is excellent news, because my apartment doesn’t have nearly enough shelf space for an edition of the Britannica.