There may be disagreement over why and exactly when doomsday will strike, but a number of individuals around the world are preparing as the end of the Mayan calendar approaches. Some don't believe the date of December 21st, 2012 necessarily marks the end of days, but have taken steps to sustain themselves in the event of world wars, natural disasters, or other catastrophes. Others — concerned that tomorrow really will bring the end of the world as we know it — have prepared bunkers, and one Chinese man even spent his life savings to construct a 70-by-50-foot ark in anticipation of a major world flood. To see some striking images of apocalypse preparations being made worldwide, take a look at this impressive collection from The Atlantic.