Start Date: End Date: Published Date Data Date
Data acquired October 31, 2007 720 x 360 JPEG
Data acquired October 31, 2007 4652 x 3634 6 MB - JPEG
Data acquired July 1, 2001 720 x 360 JPEG
Data acquired July 1, 2001 2250 x 1500 1 MB Bytes - JPEG
Although Mars is in many ways quite different from Earth—smaller, colder, drier, and hostile to life—the geology of the two worlds is sometimes quite similar. Columnar jointing—a distinctive pattern of hexagonal cracks—is visible in rocks on both planets.
Mars image courtesy High Resolution Imaging Science Experiment, University of Arizona. Devil’s Tower image courtesy Wyoming Geographic Information Advisory Council. Caption by Robert Simmon.
Published June 10, 2009 Data acquired October 31, 2007