End of the World 2012 Mayan calendar could have been influenced by visitors from Atlantis

Athanasius Kircher’s Map of Atlantis (c.1669). Note that north is at bottom. This image is in the public domain, because its copyright has expired.
Some people think that the ancient Maya were so proficient at astronomy, because they were influenced by visitors from Atlantis. The Atlantean influence could have also explained their marvelous calendar systems and their ability to coincide the beginning of the next cycle in the Long Count Calendar with the winter solstice of December 21, 2012.
Carol Chapman, author of the End of the World 2012 EBook