Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
The Science Podcast for 22 December 2006, a special Breakthrough of the Year show, highlights some of the best, worst, and most unusual scientific stories of 2006 -- and looks ahead to the areas to watch for 2007.