yes someone does know what is going to happen, God. only god knows.

no human on earth can predict when the earth will end. they  say its  based on  the mayan civilazation calander because. it ended on dec,12,2012. and they were the most entelligent people back in the day, but why should we worry about that, that was the ancient mayans over thousand years ago, that was there calander. let us worry about to day, in stead of people scaring others about the end of the world. they said it would end in 1999 also with the 999 part upsidedown and backwards,   666 the devils number, and also if ur christan , the devil has to reign on earth first, so tht means if the world ends like this, what about gods roll in this...