December21,2012marksthecompletionofthe5,125yearGreatCyc...
问题详情：December21,2012marksthecompletionofthe5,125yearGreatCycleoftheAncientMayaLongCountCalendar.Ratherthanbeinganend－point,thiscyclethatisclosingisnaturallyIfollowedbythestartofanewcycle.Whatthisnew...