Warfarin was discovered at the University of Wisconsin–Madison .
Among the scientific advances made at UW-Madison are the single-grain experiment ( which marked the birth of modern nutrition science ) , the discovery of vitamins A and B by Elmer McCollum and Marguerite Davis , the discovery of the anticoagulant medication warfarin by Karl Paul Link , the first chemical synthesis of a gene by Har Gobind Khorana , the discovery of the retroviral enzyme reverse transcriptase by Howard Temin , and the first synthesis of embryonic stem cells by James Thomson. < ref name= '' Looking back 100 years at two major biochemistry discoveries '' > The Wisconsin Badgers compete in 25 intercollegiate sports in the NCAA Division I Big Ten Conference and have won 28 national championships .
University of Wisconsin–Madison