I decided to do a bit of research, about the subject, one of many that I read was this one.

We all know the Earth is surrounded by a magnetic field that sheilds us from most of the sun’s radiation. What you might not know is that the magnetic poles we call north and south have a nasty habit of swapping places every 750,000 years or so - and right now we’re about 30,000 years overdue. Scientists have noted that the poles are drifting apart roughly 20-30kms each year, much faster than ever before, which points to a pole-shift being right around the corner. While the pole shift is underway, the magnetic field is disrupted and will eventually disappear, sometimes for up to 100 years. The result is enough UV outdoors to crisp your skin in seconds, killing everything it touches.

Now we all know that the earths poles are going through changes, makes me think there just might be some truth in it.
All the major predictions for it happening are saying it will be in December 2012. These include Nostradamas, the Mayans etc.

Some predictions say the earth will be destroyed, but most point to mankind going back to start things all over again.