dec 21-2012-is this our date of expiry?

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the most intelligent civilizations-mayan(supposed to be)on earth were accurate abt their math n all other sciences but left us with some greatest possibilty of knowing abt "the end of us" if not something is gonna happen for sure and scientists couldn't say nope it wont happen.mayan calender stops at dec 21 2012.the whole civilization vanished into thin air without leaving traces of how their civilisation ended not even a possible clue. we all if survive till 2012 how many of us will make it to write something the next day?