Sperm Massacre (image) Brown University Caption Healthy spermatids (maturing sperm) of a fly, left, are decimated in a setting dominated by a "segregation distorter," right. A runaway snippet of code that rapidly copies itself helps expose spermatids to fatal attacks. Credit Reenan lab/Brown University Usage Restrictions With credit 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.