NASA's Mars rovers have returned new evidence for past water, pictures of Earth-like clouds seen for the first time from the planet's surface, and a rock that doesn't look like anything scientists have ever seen.
"We're stunned by the diversity of rocks," Squyres said. "This stuff looks like it was put into a blender."
Opportunity's out of its crater, and Spirit just keeps motoring along. Now that we're coming out of winter (I think), there's a good chance for another whole season of exploring.