PHOTOS: Postcards From Mars

Opportunity rover still going after 8 years on Martian surface.

PHOTOS: Postcards From Mars

Postcards From Mars
Postcards From Mars
Postcards From Mars: Rovers' Exploits
Postcards From Mars: Rovers' Exploits
Postcards From Mars: Rovers' Exploits
Postcards From Mars: Rovers' Exploits
Mars Rover
Mars
Mars
Mars
Mars
Mars
Mars
Mars
Mars
The round, shallow depression was left by a drill on the Spirit rover's robot arm called a RAT, short for Rock Abrasion Tool. The idea was to expose fresh interior material for close analysis. (NASA)
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