A recent paper by Bill Rice, Urban Fridberg, and UTK EEB faculty member Sergey Gavrilets, proposes that epigenetic factors, the switching on or off of genes by factors other than other genes, may lead to homosexuality. This work arises from a working group at the National Institute for Mathematical and Biological Synthesis (NIMBioS), which is on the UT Knoxville campus. For more information, see the press release and the original article.