The Grunts of Frek in 2013 (AUDIO) Cell Press Your browser does not support the audio element. Caption By 2013, the grunts of Frek and Lucy have become much more similar. Credit Watson et al. Usage Restrictions Credit Required. 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.