I got this from another forum. It is about the average heights of Native Americans compared to Europeans in the 19th century. Don't let the scroll bar fool you , it is actually a pretty quick read, most of the length is data, maps, and references. I thought it was a pretty interesting read.
http://eh.net/XIIICongress/cd/papers...Steckel378.pdf

very interesting read damn those romans for polluting our genes! they say ceaser was about 5'4 and tall for a roman but us of celtic origin were aroung 6' and that was nearly 2000 years ago. guess we are now only just getting back to where we were then