Saturday, July 7, 2007
On July 7th, 2003, the Mars Exploration Rover B, known as Opportunity, was sent to Mars. The probe was launched less than a month after its twin, known as Spirit. After successful landing on the Meridiani Planum, the Opportunity probe started to study a history of flowing water there. The rover mission was extended from the original 90 days to more than three years of a breathtaking flow of data with Opportunity becoming the first probe to travel more than 10 kilometers on the Martian surface!