Sojourner leaving the "Rock Garden"

Taken in July 1999, this shows powerhouse Sojourner, the first rover on Mars, who outlived the original 7-day mission target by an additional 76 days.
Sojourner near the "Dice"

Wondering how NASA took these amazing Mars photos? The Pathfinder lander (who dropped off Sojourner) stuck around to document everything that happened.
Sojourner leaving an x-ray spectrometer on "Moe"

You can see the bottom panel of Pathfinder in this photo, as Sojourner completes its information gathering in December 1997.
Sojourner snuggling "Yogi"

Sojourner snuggles up to the rock “Yogi” in October 1997 to get a sample – finding that the rock is low in quartz and quite similar to basalt rocks on Earth.
Mars "blueberries" courtesy of Opportunity

Thanks to rover Opportunity in April 2004, we got this up-close and personal look at small mineral concentrations NASA has dubbed “blueberries” (for obvious reasons).