Chimps Learn Grunt 'Dialects' From Others | Video

In 2010, Frek (a Dutch chimp) has high pitched grunts compared to Lucy (an Edinburgh chimp). By 2013, the grunts of Frek and Lucy have become much more similar. (Full Story)

credit : Live Science / Watson et al. / Frek photo: Jamie Norris, Cindy photo: Sophie Pearson