Invention Stories: How Sick Cows Led to a Blockbuster Drug | Joe's Big Idea | NPR

A deadly bleeding disease in cows led to the development of the most popular blood thinner on the market: Warfarin. In "Invention Stories" we explore the unexpected paths to discovery.

• Read When Cow Blood Held The Key To Saving The Future President at www.npr.org/2017/06/06/531749974/when-cow-blood-held-the-key-to-saving-the-future-president

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