The Mars Exploration Rover program consists of two robotic rovers, Spirit and Opportunity, launched by NASA in 2003. Their primary mission was to explore the surface of Mars, analyze soil and rock samples, and search for signs of past water. Both rovers exceeded their expected lifespans, with Opportunity operating for nearly 15 years. Spirit and Opportunity provided valuable data that enhanced our understanding of the Martian environment. They discovered evidence of ancient water, contributing to the ongoing search for potential life on Mars. The success of these missions paved the way for future exploration, including the Mars 2020 mission with the Perseverance rover.