In all in case that, if we were giving real attention to these forecasts, we would not live our lives, therefore the same ones appear of two in two years, approximately, alarming an incredible number of people. I am not hindering nobody to believe in that it finds that is certain, I am only alerting: how many times the human being committed errors? How many times already let us stow maken a mistake. Already we speculate, in distant times, that the land would be square shaped, and that we would fall for its edges if we sailed in direction to they, we feared the oceans for believing that they inhabited frightful monsters, some cultures did not take bath why they believed to be harmful to the health! If we were to count in the fingers the errors that already we commit, we would pass an entire life to make this, and it would not be enough. It is through the errors that we arrive at the certain reply, but how many errors we go to commit until terms a certainty? For this reason, we do not have to lose the head to each time that a new forecast is launched. One of the forecasts that more scare in them is of the Mayan calendar. Although some rightnesss in its dates marked for catastrophes, we cannot affirm that it has not been a mere coincidence, since concerteza exists more forecasts that had been never carried through (which, is clearly, does not have to appear). To consist, the Mayan people, although shining, in occasions special, he also sacrificed animals and human beings, as a type of ' ' oferenda' ' its deuses. They even though arrived to sacrifice children, for believing that they would be offerings ' ' more puras' '. I remember the vocs, I am not criticizing the Mayan culture, I only think that it is a very old culture, of archaic habits e, must say, extremely bloody, that if based on the movement of the planets and the stars to elaborate its calendar.