(NEWSER) – In the US, we mostly laugh off the Mayan-predicted apocalypse that will probably eradicate us all in a few days. But in China, it's serious business. Authorities there have now arrested more than 500 members of the banned Christian "Almighty God" cult for allegedly spreading doomsday prophesies, the AP reports. Police also seized leaflets, DVDs, books, and other materials warning of the impending apocalypse. The cult believes that the "sun will not shine and electricity will not work for three days beginning on December 21," the state-runXinhua news service reported.