Plate Tectonics?
It is always intriguing to ask if plate tectonics have occurred in other planetary objects. There was a tantalizing observation suggesting possible crustal spreading on Mars. The evidence was based on magnetic mapping of the Martian surface. Some linear magnetic stripes were detected in the southern highland.

The observation is shown in Figure 7.4. For more details, please read the NASA/JPL news release. This evidence is only tentative, however. Currently, most scientists do not believe that there are strong evidence for the existence of plate tectonics on Mars.