A visitor looks at the 12th-century Dresden Codex, also known as the "Codex Dresdensis," one of four historic Mayan manuscripts that still exists in the world, and that together suggest modern civilization will come to an end on Dec. 21, 2012, at the Saxon State Library, Nov. 8, 2012 in Dresden, Germany. The documents enumerate the Mayan calendar, which will complete its last cycle on Dec. 21. (Joern Haufe/Getty Images)