Anonymous Coward writes, Well, a few days ago we were wondering if the NASA Mars rovers were named Marvin and Daffy; looks like the answer is no. Check out my writeup elsewhere; the official lander names are Spirit and Opportunity. According to the press release from The Planetary Society, the naming contest was co-sponsored by Lego Corp. which has Lego mascots (NOT Marvin and Daffy) painted onto the attached DVDs on each rover.