According to the Long Count Calendar used by the Maya, the current Great Cycle which has lasted 5, 125 years is to end in 2012. What will happen when this occurs has been a hot topic for many years, literally decades, since the mid-1980s. Based loosely on Maya cosmology and mythology describing the death and rebirth of humankind, many observers have speculated on the events preceding and subsequent to the changing of the Great Cycles. These speculations have developed into a theory which is now known as the Mayan Prophecy of 2012. This Prophecy supposedly foretells significant changes to our way of life as the current Great Cycle ends and the next one begins. Exactly what these changes will be, and how it might affect all of us, run the gamut from the total destruction of our world, essentially the End of Days of our existence, to a new evolution of humankind. What one believes depends upon how he or she views life in general. If one is a pessimist, catastrophe will rule the day. On the other hand, an optimist will expect a new day with sunshine and roses. This book summarizes the most popular theories coming from both viewpoints, ultimate catastrophe versus a new beginning for humans and life on our planet. It then traces the archeological evidence and observations of noted Mesoamerican scholars to establish the validity and true nature of such a Mayan Prophecy. Along the way, other noteworthy prophecies regarding the future of our existence will be examined. Those future events predicted by the extraordinary prophet, Nostradamus, are especially informative. Recently, with the advent of advanced technology, notably computers, cyber predictions of our future and how they relate to the Mayan Prophecy will also be examined. Lastly, the enigmatic saga of the Maya crystal skulls appears to play an important role in our future. Much about the legend of the crystal skulls comes from the Maya Elders, who do anticipate great changes in the coming Great Cycle. Also, the mysterious phenomenon of the formation of crop circles may provide other clues as to what the future holds for all of us as we enter the next Great Cycle.