Has the Mystery of Uranus' Tilt Been Solved?

One of the most enduring mysteries of the Solar System may be a step closer to being solved.
Although the general consensus is that Uranus was involved in some kind of cosmic hit-and-run, two researchers from Paris think the gas giant may have gradually wobbled over millions of years, eventually tipping due to the presence of a large moon.

Full article by Ian O'Neill on Discovery News