You may not believe so, but millions do. They're convinced that ancient Maya priests calculated Dec. 21, 2012, as the end of the world as we know it. These claims and warnings, prognostications and reassurances are on bookstore shelves, on websites, in museum exhibits and in tourist promotions. The global doomsday industry even has a name — 2012ology.

Apocalyptic anxiety is, if anything, reassuringly familiar. This most recent phenomenon taps into a well-established tradition in our society. Just this past year, religious broadcaster Harold Camping took two swings at predicting doomsday, pinpointing one date in May and, when the world emerged unscathed, one in October.

What makes 2012ology different is the starring role it gives to the ancient Maya. Among numerous native cultures in the Americas, the Maya seem to have captured the popular imagination. They are cast as a mysteriously wise civilization, one that disappeared into the tropical forests of Central America, taking with it a sacred knowledge that has only recently started coming to light.