Most U.S. Dairy Cows Are Descended From Just Two Bulls

Article URL: https://www.npr.org/sections/thesalt/2019/10/17/770696476/most-u-s-dairy-cows-are-descended-from-just-2-bulls-thats-not-good

Comments URL: https://news.ycombinator.com/item?id=21287924

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