Spirit's Spectrometer

This talks about the Mars rover Spirit, and its recent activities on the planet. It also details the use of its thermal emission spectrometer on some rocks around its current position. Although maybe not that entertaining, the article definitely illustrates how much effort and time goes into each meter that the rovers travel, and how much caution and care missions like this require. I can't imagine how much caution missions with humans to mars are going to require when they need a whole team to decide what path a robot should take.