the center of the galaxy will perfectly line up with the whatever, thus making our climate so terrible that we will have another ice age, is what they are talking about. or the other possibility is that well the earth regens it self every 26k years and 2012 will be the 26kth year since it has happened all the volcanos will go off, and level the planet or a big meteor about 7 miles long will fall from the sky like it did to kill the dinosaurs. or WW3 will hit in 2012 and thats game over for the world. 1 or all will happen in 2012 thats why they are that