text: Opportunity Rover Stumbles Upon Rocky, Maybe Watery, Find (SPACE.com) SPACE.com - Almost by accident, NASA's Mars rover Opportunity has found a rock that may point to a second water event in the red planet's past.
inputs: Opportunity Rover Stumbles Upon Rocky, Maybe Watery, Find (SPACE.com) SPACE.com - Almost by accident, NASA's Mars rover Opportunity has found a rock that may point to a second water event in the red planet's past.