This 3-D image taken by the left and right eyes of the panoramic camera on NASA's Mars Exploration Rover Spirit shows the odd rock formation dubbed 'Cobra Hoods' (center). 3D glasses are necessary to view this image.

This 3-D image taken by the left and right eyes of the panoramic camera on the Mars Exploration Rover Spirit shows the odd rock formation dubbed "Cobra Hoods" (center). Rover scientists say this resistant rock is unlike anything they've seen on Mars so far. Spirit will investigate the rock in coming sols. The stereo pictures making up this image were captured on sol 156 (June 11, 2004).

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