PARIS (AFP) - Uranus has puzzled scientists ever since the probe Voyager 2 did a flyby in 1986 and found that its magnetic field appeared to break the planetary rulebook. The evidence from Earth, Jupiter and Saturn determined that a planet's magnetic field should be like that of a bar magnet, with a north and south pole that runs roughly along the sphere's rotational axis. But Uranus -- and Neptune, too, Voyager found -- are radically different. Their magnetic fields are tipped over (the north-to-south line lies midway to the equator or even closer) and there are two north and...
