This image shows the wall of a scuff mark NASA's Curiosity made in a windblown ripple of Martian sand with its wheel.

This image shows where NASA's Curiosity rover aimed two different instruments to study a rock known as "Jake Matijevic." (NASA/JPL-Caltech/MSSS)

This image shows fine sand from Mars that was filtered by NASA's Curiosity rover as part of its first "decontamination" exercise, October 10, 2012.

The image shows the north wall and rim of Gale Crater in the distance. The image shown here has been rotated to correct for that tilt, so that the sky is up and the ground is down.

The scoop on NASA's Curiosity rover shows the larger soil particles that were too big to filter through a sample-processing sieve that is porous only to particles less than 150 microns across, October 10, 2012.

The Mars Curiosity rover's robotic arm takes aim at Mount Sharp in a mosaic that combines navigation-camera imagery from Sols 2, 12 and 14 (Aug. 8, 18 and 20). The shadow of the rover's camera mast is visible in the center foreground.

A penny that is used by Curiosity to calibrate its Mars Hand Lens Imager camera. The penny is covered in Martian dust, September 9, 2012.

This view of the lower front and underbelly of Curiosity combines nine images taken on September 9, 2012.

This photo, taken by the Curiosity rover, shows the layered geology of Mars.

This view of three of Curiosity's wheels combines two images taken on September 9, 2012.