Well, Masutov pretty much covered it. So I'll just add - when you run into claims like 2000/2012 just sit and wait for the evidence to come. Nine times out of ten you'll have a very long wait.
Crack in a magnetic field? Overdue for a mass extinction? Oh dear it all sounds so scary. I'll have to buy a book and read up on it.
Welcome to the board. Pull up a chair and sit a spell.