Only mor ons think that!!! The Mayan calender starts over. If you want real scenarios the world will end from mankind blowing each other to pieces or the Sun destroying us millions of years from now. Or even more probable a asteroid sneaking in this very second to whenever!
Jesud said in the bible that no one will no when the world ends only God. And no idiot Scientist can say ' oh ya were all gonna die on December 21st, 2012 everyone! Yay!' NO THATS NOT HOW IT WORKS COMMON FREAKIN SENSE PEOPLE!!!!!!!