Courtesy OpenClipArt,  CC0 1.0 Universal The introduction of DNA testing for genealogy was revolutionary. The Sorensen Foundation, NatGeo and other non-profit efforts, along with scientific research yielded books such as Bryan Sykes'  The Seven Daughters of Eve: The Science That Reveals Our Genetic Ancestry   back in 2001.  But until Family Tree DNA began offering Y and mitochondrial (mt) DNA kits for sale, there was only the crudest information available.  Thanks to Bennett Greenspan of Family Tree DNA, who persisted in finding a way for this important data to be available to genealogists, we now have these wonderful record sets. He and other citizen scientists have persisted; the more we test, the more we know about shared relatives and our deep ancestral history.  The  Human Genome Project helped immensely and scientists of all types continue to deepen our knowledge of not just Y and mitochondrial (mt) DNA, but also autosomal and the more-rare...