[Aztlan] sweet potato

[martha noyes]

I hope it's OK to point this article out:

In today's Nature News this article -

Drifters could explain sweet-potato travel 
An unsteered ship may have delivered crop to Polynesia. 
Brendan Borrell 
http://www.nature.com/news/2007/070514/full/070514-20.html

which references this study -

Montenegro Á., Avis C. &Weaver A. J. Archaeol. Sci., 
Preprint at http://climate.uvic.ca/people/alvaro/SPotato_V2.pdf (2007)