Alan Rogers, University of Utah (IMAGE) University of Utah Caption University of Utah anthropologist Alan Rogers conducted a study that provides new mathematical support for a theory that explains why men often support their sisters' children in cultures where infidelity is common. Credit Lee J. Siegel, University of Utah Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.