The Grunts of Lucy in 2013 (audio) Cell Press Share Print E-Mail Loading audio... Caption By 2013, the grunts of Frek and Lucy have become much more similar. Credit Watson et al. Usage Restrictions Credit Required. 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.