The Mayan Calender never "predicted" that there will be a huge disaster and the world will end in 2012. All that's happening is a new katun cycle will begin. This actually would have been celebrated by the ancient Maya and would have probably been commemorated by raising an extra impressive stela. It is telling that credible Mesoamerican experts dismiss this theory which is more a by-product of "pop" archaeology (i.e. pseudoarchaeology) than historical fact. I personally wish that Mayan scholars would speak out against this story more vocally, because proponents of the metaphysical theory are currently getting a lot more attention and misleading people who don't know any better.
As to Nostradamus - his predictions are couched in such murky language that they refer to anything and it's only after an event happens that people look at them and say, 'Oh, look! Nostradamus predicted that!" But did he? Not really. You have to twist and interpret his words, and that means they aren't truly accountable. Merlin confined his forecasts to the magic court of King Arthur. Merlin wasn't a real person, and Camelot was a mythical kingdom so nothing from that land of make believe pertained to our world.
As to Nostradamus - his predictions are couched in such murky language that they refer to anything and it's only after an event happens that people look at them and say, 'Oh, look! Nostradamus predicted that!" But did he? Not really. You have to twist and interpret his words, and that means they aren't truly accountable. Merlin confined his forecasts to the magic court of King Arthur. Merlin wasn't a real person, and Camelot was a mythical kingdom so nothing from that land of make believe pertained to our world.