ScienceSqueaky-clean NASA rover Opportunity says, 'But first, let me take a selfie' NASA's Mars rover Opportunity took a photo of itself, showing cleaner-than-usual solar cells. What does this mean for the mission?by James Maynard
ScienceForget doughnut rock: Mars rover Opportunity celebrates 10 years on Red Planet by finding life-friendly trace of waterby Rhodilee Jean Dolor
ScienceMysterious rock appearance next to slumbering Mars rover Opportunity leaves scientists scurrying for answersby Maryanne Moll