Last week, when I was hanging out at the AAAS meeting in San Francisco, I ran into someone I hadn't seen in a long time: New York Times columnist John Tierney. Tierney isn't someone who I know particularly well, but I did write a long profile of him many years ago for The American Prospect magazine. That was back when I was a young, wet-behind-the-ears political reporter. Even then, though, I was oddly fascinated by Tierney's techno-progressive optimism about science and technology. We called the piece "Libertarian Rhapsody," which I still think is a great title. Meanwhile, over the intervening years Tierney has become a Times op-ed columnist--before he was a Metro columnist--as well as one of our fellow science bloggers with the newly launched Tierney Lab. His take, I think you'll find, is often conservative and contrarian but always thoughtful, never knee-jerk. He's the kind of voice that, regretfully, we really seem to lack here at ScienceBlogs. It's a wonderful site we've got, but not very diverse politically, which is a real handicap. So, in an effort to redress that, I've added Tierney Lab to the blogroll. I hope you'll check it out, and when you do so, try not to get too angry at me for directing you there....