David Carrier, University of Utah (image) University of Utah Share Print E-Mail Caption University of Utah biology Professor David Carrier's new study concludes that human ancestors known as australopiths retained short legs during their 2-million-year history because a short, squat stature helped spell victory in male-male fights over females. Credit Nadja Schilling, University of Utah. 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.