It used to be easy to separate man from beast. Then we realised animals, too, can experience sophisticated emotions and communicate through language. But there is one thing that is beyond even our closest relatives, chimpanzees, and that’s the ability to be spiteful.
in Leipzig, Germany, conducted experiments in which they placed a food-laden table in front of a caged chimp. Attached to the table was a string the chimp could pull to collapse the table. The chimp resisted the urge to pull the string…
