I was thinking about the recent discovery that Mars had probably been hit by a Pluto-sized planetoid early on in it's history when the idea that that could have been responsible for its axial tilt and moons. Would it have been possible that the impact caused Mars' early on high axial tilt, and also formed Phobos and Diemos at the same time? The two moons may have stabilized the planet's tilt and orbital speed much like the Moon did ours. Similar lengths of days and axial tilt between Earth and Mars seem to hint a common cause, but that might just be in my head. Opinions?