Two rovers, Spirit and Opportunity, arrived on Mars in 2004 for planned missions of 90 sols. A sol is a Martian day - about 40 minutes longer than an Earth day. Spirit got trapped in 2009 and wasn't able to move anymore, but continued to collect data. The last contact with her was the following year. Scientists think she didn't survive the Martian winter after being unable to move into a position where her solar panels could collect sunlight.
Spirit's mission was officially ended in 2011.
But Opportunity is not only still at work,
she completed the Mars Marathon on March 24th after journeying 26.219 miles (42.195 km). Admittedly, 11 years and two months isn't up to Olympic standards, but it's a Martian record!
