NASA is the only agency that successfully landed rovers on Mars’ surface, and they’ve done it on several occasions. The first time was in 1976 with Viking 1 and Viking 2, but there was also the Pathfinder-Sojourner in 1996, the Mars Exploration Rovers Spirit and Opportunity in 2004, and Curiosity in 2012. These expeditions have captured some mind-boggling sights.

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