Dr. Michael Hammer is the main scientist behind Family Tree DNA research. They do their tests at Dr. Hammer's lab at the University of Arizona in Tucson. Here is a website that has links to 38 of Dr. Hammer's published articles. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&db=pubmed&term=Hamm er+MF[au]&dispmax=50 This is a long URL that ends in =50. If you have trouble with it try cutting and pasting it into your internet explorer address box. This site provides abstracts of the articles. The entire article can be found in the publication cited. Some of these publications are online. The "related articles" link will lead you to abstracts of a lot more articles on the subject. Searching for all of these online or in your library ought to keep you occupied for a little while at least. ;-) Bette