A new study indicates that Earth’s magnetic field can change 10 times faster than earlier thought, almost 100 times faster than current changes. Scientists have considered the history of the swirling flow of iron 1,740 miles below the planet’s surface, traversing the last 100,000 years.  The study reveals that the fastest directional changes are linked with the movement of reversed flux patches across the surface of the liquid core. The breakthrough could have major implications as the magnetic field not only helps in exploration but also shields humans from radiation coming from space and holds the atmosphere in its position.