Space.com is carrying this article summarizing new developments in Martian geological research. By examining recently discovered "hole chains" found on the Martian surface, scientists are beginning to speculate that Mars may still experience "marsquakes" caused by tectonic movements. Unfortunately nobody's landed a seismograph on the planet yet, so right now it's not much more than speculation. However, it does point the way toward news sets of experiements to figure out what makes the red planet tick.