Multiple choice general knowledge science & technology In which year did the US Spacecraft Mars Pathfinder land on Planet Mars? 1996 1997 1998 1999 Reveal answer Fill a bubble to check yourself B Correct answer Explanation Mars Pathfinder landed on Mars on July 4, 1997. The mission included the Sojourner rover, which was the first wheeled vehicle to explore another planet. The spacecraft was launched in December 1996, but landed in 1997.