About the author
David Epstein is an investigative reporter at ProPublica. He is the author of two books: Range: Why Generalists Triumph in a Specialized World (2019) and the Sports Gene: Inside the Science of Extraordinary Athletic Performance (2013). He previously worked as a senior writer at Sports Illustrated. He and Selena Roberts broke the story that Alex Rodriguez tested positive for steroids in 2003. He graduated from Columbia University with a Bachelor’s degree in environmental science and astronomy in 2002 and master’s degrees in environmental science and journalism.