The new book on the Genealogy and Genetics of Leonardo Da Vinci by Alessandro Vezzosi and Agnese Sabato is amazing. It caused a blaze of interest in the Leonardo Da Vinci DNA Project, including many interviews and an impressive series of articles.
Here is the updated list of media coverage as of mid-June.
In summary, there were:
549 articles at 444 different news sites, published in 24 languages in 51 countries
Potential impressions (online articles only): 2.9 billion