The other is more or less catastrophic and involves either earths crust or the whole planet tipping over. That might have happened as recently as 12,000 years ago and be a regular event.
I'd like more info please.
71 posted on 07/10/2008 3:28:41 PM PDT by Dick Vomer
(liberals suck....... but it depends on what your definition of the word "suck" is.,)