“[A chimpanzee gathered] little stockpiles of stones…hiding them around his cage, even constructing covers for them, so that at a later time he would have something to throw at zoo visitors who annoyed him.” (ESSAY · ANIMAL MINDS – – Animals think, therefore… – – The inner lives of animals are hard to study. But there is evidence that they may be a lot richer than science once thought [The Economist])

http://www.economist.com/news/essays/21676961-inner-lives-animals-are-hard-study-there-evidence-they-may-be-lot-richer-science-once-thought

This remind’s me of a Seinfeld classic, Kramer’s encounter with the monkey named Barry.