>When these nuts talk about pole shift, it is the magnetic poles, not the
>rotational exis that they speak of. We know from astronomical evidence,
>and our own planet, that these two types of poles are not one and the
>same. As you can see by the scenarios above, it may take a much smaller
>astronomical event to cause a pole shift, if it occurs in just the right
>way.
>
As EvMick pointed out, the magnetic poles switch every few hundered thousand
to million years. And it doesn't seem to require any external astronomical
event. It's something to do with the dynamics of the liquid metal of the
Earth's core.
--CarlF