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Mars Pathfinder
A NASA mission that landed on Mars in July 1997 and deployed the Sojourner rover. It was designed to demonstrate a low-cost method for delivering scientific instruments to the Martian surface and to explore Mars' atmosphere, climate, geology, and composition.
Source: mars.nasa.gov
APODs including "Mars Pathfinder"
Yogi Rock on Mars
09/03/1998
Image Credit: NASA Astronomy Picture of the Day
Yogi is possibly the best photographed rock on Mars. By combining many pictures taken during the Mars Pathfinder Mission last year, scientists were able to create a super-resolution, digitally enhanced image that better allows them to study Yogi's surface and more accurately determine how Yogi was formed. The smoothness of some Martian rocks suggests previous interactions with water, implying that Mars was both warmer and wetter in the past.