interesting section, a bit OT
The earth's magnetic poles are shifting continously. The reasons for this is believed to be the result of processes deep in the center of the planet, where the liquid core comprised of metal spins and flows like water, serving as a conductor for Earth’s magnetic field. Some commentators have suggested that this may have disastrous consequences, but NASA wrote in 2011 that: "Earth's magnetic field has flipped its polarity many times over the millennia -- but this causes no dramatic effects, and will not lead to problems in 2012" - but the entirety of the potential consequences remain unclear. The general consensus is that a pole shift is now overdue and the speed up of the movement of the magnetic poles may indicate that this is about to happen in the next few years. At the same time earth is experiencing a weakening of it's magnetic field which has the potential to be a danger for satellites orbiting earth.