Every year we put out the Year-End Zeitgeist, a look at the most popular and fastest-rising search terms in hopes of telling us something about what's been on our (collective) mind. This was my first year working on this project, and I'm here to report I was pleasantly surprised by many of the findings. Yes, 2007 was a big year for U.S. politics, and, of course, there were several peaks coinciding with the indiscretions of a few starlets -- but what I found particularly interesting were some of the timeless themes that surfaced: what is love, who is god and how to kiss, to name a few. No matter how much changes over time, these questions seem to be constants. I don't know about you, but I hope we never get to the bottom of them. Searching for an answer is half the fun.

If you haven't already done so, be sure to check out our complete list for 2007.