The Greatest Discoveries From NASA's Mars Opportunity Rover

The Opportunity rover, like its twin Spirit, was designed for an original mission of just three months. When engineers lost contact on June 10 of last year, it had been exploring for fourteen years. And today, mission scientists finally declared an official end to the mission. Here are just a few of Opportunity's many successes during its long Red Planet expedition.
Heat Shield Rock
Opportunity discovered the first meteorite on Mars, sitting near its own heat shield. While a few meteor