Science says sperm whales live in clans and learn a 'language' User jctaguba07, in the Everything Science subreddit, 10 Sep 2015
Study finds that processes similar to those that generate complex human cultures exist in sperm whales - "The social relationships of sperm whales are organized in a multilevel society with an upper level composed of clans of individuals communicating using similar patterns of clicks (codas)." User twenafeesh, in the Reddit Science subreddit, 08 Sep 2015