At http://phys.org/print258278534.html … change in the axis of rotation is Out of Bounds on Earth but strangely not so on Mars. The ESA Mars Express has created a colour image of the geology of a couple of craters on Mars that may show evidence the planet underwent significant 'periodic' fluctuations in its climate due to changes in its axis of rotation.
Pole shift on Mars
8 June 2012Geology