In late November, NASA’s Curiosity, the world's biggest extraterrestrial rover, began rocketing toward Mars (see photos of the launch here) in search of any hint that the red planet might have provided a home for microscopic life. The Curiosity will eventually reach Mars in August after covering 345 million miles. Earlier this year, an artist released a rather dramatic animation depicting key moments in the mission -- the voyage, the landing (don't miss this part!), the exploration, and all of the rest. It's another candidate for our collection of Great Science Videos.