Yogi Rock . ... Credit Copyright: IMP Team JPL , NASA Explanation: This portrait of Yogi Rock, a now famous boulder on Mars , was recorded on Sol 3 by the Imager for Mars Pathfinder ( IMP ). Big and friendly looking like its Earth cartoon namesake Yogi Bear, Yogi Rock is a prominent visible feature at the Pathfinder landing site . Yogi and surrounding soil are being examined close up by the Sojourner robot rover. ... NASA Web Site Statements, Warnings, and Disclaimers . ...