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John Cleary is lecturer at Heriot-Watt University with specialist interest in Y-DNA and ancient DNA. Iain McDonald is an astrophysicist at the University of Manchester and specialist in the advanced analysis of Y-DNA for genealogy.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.