“When you look at the most important accomplishments of the mission, a lot of them were due to Opportunity. It was the one that found the really powerful evidence for a habitable environment in Mars' past. It's sort have been the good luck rover for this whole thing.”
“The search is difficult to achieve in a single mission. When we do a mission that is aimed at finding extant life, which probably requires liquid water at the surface, we will know exactly the place to go.”
