Curiosity rover finds water-carved 'book' rock on Mars (photo)
A book-shaped rock on Mars was likely carved by ancient water running through the area, scientists on NASA's Curiosity rover mission say.
The Mars rover Curiosity, also known as the Mars Science Laboratory, landed on the Red Planet in August 2012.
Related Topics: Mars, NASA, India Mars Orbiter Mission, Mars Rover Opportunity, Exomars