The Mars Exploration Rovers are robotic vehicles designed to explore the surface of Mars. Launched by NASA, these rovers gather data about the planet's geology, climate, and potential for past life. Notable rovers include Spirit, Opportunity, and Curiosity, each equipped with scientific instruments to analyze soil and rock samples. These rovers travel across the Martian landscape, sending back images and information to Earth. They help scientists understand the planet's history and assess its habitability. The ongoing exploration contributes to future missions, including potential human exploration of Mars.