Wacky magnetic fields of ice giants may stem from conductivity changes in their deep interiors
When NASA's Voyager 2 robotic probe flew by Uranus and Neptune in the 1980s, it uncovered an anomaly: their magnetic fields are highly disordered, unlike Earth's, which has well-defined north and south poles.
We haven't written up this one. Phys.org has the full story — the link below goes straight to it.