Sojourner, the first wheeled robot to explore Mars, landed in July 1997 as part of the Pathfinder Mission. It was an experimental vehicle designed to test NASA's technical solutions in the Martian environment.
Image credit:NASA/JPL-Caltech
Spirit Rover
Spirit, the 2nd rover by NASA was landed on Mars in January 2004. It was the part of the Mars Exploration Rovers Mission to find the evidence of water on Mars.
Image credit:NASA/JPL-Caltech
Opportunity Rover
Opportunity, part of the Mars Exploration Rover Mission, landed in January 2004 to search for water-related minerals and analyze their distribution and composition.
Image credit:NASA/JPL-Caltech/Cornell Univ./Arizona State Univ
Curiosity Rover
Curiosity was landed in August 2012 was the part of Mars Science Laboratory Mission. Its objective was to find if life ever existed on Mars, water, climate and chemical ingredients
Image credit:NASA/Dan Gallagher
Perseverance Rover
Perseverance, part of the Mars 2020 mission, landed on Mars in February 2021 to search for signs of past or present life and assess Mars' potential for human exploration.