Voyages of the Pyramid-Builders, which not only disputes the idea that pyramids (Ziggurats) originated in South Asia (Sundaland), it suggests strongly that the pyramid-building tradition in the Sundaland area is a secondary wave coming back out of Mesoamerica as recently as the 12th and 13th centuries AD (including evidence of Old World maize then):
http://frontiers-of-anthropology.blogspot.com/2012/01/voyages-of-pyramid-builders.htmlAnd a message from David Campbell (writer on the subject of pyramids on his own) commenting on two of the other recent FOA blog postings:
http://frontiers-of-anthropology.blogspot.com/2012/01/comment-by-david-campbell-on-origin-of.html