Alexandra Green, The University of Sydney (IMAGE) University of Sydney Caption PhD student Alexandra Green recording Holstein-Friesian cows at Mayfarm, Camden Campus, The University of Sydney, Australia. Credit Lynne Gardner/University of Sydney Usage Restrictions For this story alone 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.