NASA's next Mars rover, a car-size robot known as Curiosity, is slated to launch in November 2011 and land on the Red Planet in August 2012. Its main mission is to assess whether Mars is, or ever was, capable of supporting microbial life.
Exactly where the rover touches down is crucial. The landing site must be near an area abounding with signs of past water activity, because life as we know it relies on liquid water. It should also be close to some interesting geology, which generally means hills, valleys and exposed rock outcrops. And it has to be safe for the rover to land.
NASA has narrowed Curiosity's possible landing sites to four candidates: Eberswalde Crater, Gale Crater, Holden Crater and a region known as Mawrth Vallis. The space agency is expected to make a final decision in late June or early July. Which one do you think NASA should pick?