This close-up image of 'Shark,' in the Bookshelf at the back of the Rock Garden, was taken NASA's Sojourner Rover on Sol 75. Also in the image are 'Half Dome' (right) and 'Desert Princess' (lower right). Sol 1 began on July 4, 1997.

This close-up image of "Shark," in the Bookshelf at the back of the Rock Garden, was taken by Sojourner Rover on Sol 75. Also in the image are "Half Dome" (right) and "Desert Princess" (lower right). At the bottom left, a thin "crusty" soil layer has been disturbed by the rover wheels.

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology (Caltech).

Photojournal note: Sojourner spent 83 days of a planned seven-day mission exploring the Martian terrain, acquiring images, and taking chemical, atmospheric and other measurements. The final data transmission received from Pathfinder was at 10:23 UTC on September 27, 1997. Although mission managers tried to restore full communications during the following five months, the successful mission was terminated on March 10, 1998.

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