Exploring Why Males Are Larger than Females Among Mammals (image) Wiley Share Print E-Mail Caption In most animals, females are larger than males, but in most mammals, males are larger than females. A new analysis published in Mammal Review examines the potential drivers of these differences. Credit Marcelo H. Cassini, PhD Usage Restrictions None Share Print E-Mail 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.