On February 16th, NAI scientists were featured in a live broadcast of NPR's Science Friday. Tune in to the podcast to hear how astrobiologists are following the water and the energy, trying to target those parts of the planet most likely to harbor life. Plus, learn how the rovers Spirit and Opportunity have changed our ideas about the Martian environment, and what evidence future missions will look for. http://www.npr.org/templates/story/story.php?storyId=7453410 [source: NAI Newsletter]