NASA explains why the world will not disappear on December 21

worried about your fate to 21 December? Do not worry, NASA took the time to prepare a video explaining A + B why the world will not disappear that day "special."

They are kidding or confident, NASA. Laughing uproariously the "threat" end of the world scheduled for December 21, the organization has already released a video Science Cast dated 22 December 2012, which will explain why the world is not threatened by various predictions craziest each other have been developed. And why the Mayans never ruled on an end of the world December 21, 2012.