This document summarizes theories about the end of the Mayan Long Count calendar in 2012 and potential ramifications. It discusses the Mayan use of complex calendars to track time cycles and their prediction of global catastrophe. Some predictions include pole reversal, increased solar activity causing warming or an ice age, and tectonic plate shifts. The document examines the astronomical alignment in 2012 and theories that this could trigger earth changes marking the end of the current world age.