SEM clump head (IMAGE) University of Maryland Caption A new study used machine learning to identify how cell shape is associated with complex behavior. The deer mouse sperm above have wide heads which are associated with sperm aggregation and swimming as a group. Credit Heidi Fisher, UMD Usage Restrictions none License Original 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.