Spirit Mars Rover Reaches 'Home Plate'

NASA’s Spirit Mars rover has arrived at a site dubbed "Home Plate" within Gusev crater. But what the robot found has left scientists puzzled.

As the Mars machinery relays images of the area, the sightseeing has sparked healthy debate within the team running the mission.
It has a shape when seen from above that is reminiscent of a playa or evaporite basin…so that has made it a point of possible interest in a mission seeking evidence for past water on Mars...
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