I watch a show call Naked Science. Two weeks ago they were talking about the Earth magnetic poles. They said the earth poles had switched many times before. Even though nobody was here to see it, this is why they belive it:
We can tell this has happended because the magnetic moment of the rocks that make up the ocean floor have an alternating direction.
So apparantly these poles haven't changed in years and this could happen soon. They don't know what and when is going to happen because there is not record of it. So I wander if this climate changes has something to do with this?? Are we destroying the planet or all this global warming is part of this?