This NASA video showcases Curiosity, NASA's Mars rover that will, over a 23-month mission, collect and analyze Martian soil and rock samples while traversing a targeted area of the planet testing for evidence of current or past life. [1:59]

NASA scientists are still trying to free the Spirit rover, which has been stuck in Martian soil since April. After a long period of study, the rover pilots began a careful series of maneuvers designed to back Spirit out of its sand trap....