Giant Sphere On The Surface of Mars

This amazing image is from NASA's HIRISE homepage. We recommend to download the high resolution images and not to look at the browser images.

NASA link: http://hirise.lpl.arizona.edu/PSP_010329_1525

Notice the shadow created by the sphere shaped object.  To us that tell us that its not a small object spotted from the Mars Range to target site 263.8 km (164.9 miles) Reconnaissance Orbiters HIRISE camera