On Sept. 27, 1997, NASA's Mars Pathfinder lander transmitted its last data to Earth after three months on Mars, far exceeding its planned one-month mission. The $262.3 million Discovery-class mission carried Sojourner, the first Mars rover, and tested airbag landing and rocker-bogie suspension technologies later used by Spirit and Opportunity.
NASA's Mars Pathfinder Sends Final Transmission from Red Planet
Source: Space