The Opportunity Mars Rover Was Meant to Last 3 Months—So How Did It Survive 15 Years?
This rover made the most of its Martian opportunity.
NASA's Opportunity rover, a robotic vehicle that explored Mars for nearly 15 years, broke the record for the longest-working robot on the Martian surface. But it wasn't meant to last that long! Let's look back at exactly how Opportunity exceeded all expectations.
