[Knipps]

Originally Posted by SteveR

I'm not sure about knocked off its axis, but I know that every so many tens of thousands of years the poles switch, so north becomes south and south becomes north. I remember reading that in some science book and saw it on Discover Channel a few times.

that, i've heard of.

http://www.newscientist.com/article.ns?id=dn4865