Richard Collins: This will poke your thinking on bird brain crows

By Richard Collins

In The Descent of Man, Darwin claimed chimpanzees use tools. Nobody believed him at the time. Long after his death, however, great apes were filmed using stones to break open the hard shells of nuts. Other primates displayed similar skills. Then dolphins and elephants were admitted to the exclusive tool-using club, while fish were observed smashing shells on stones. Octopuses perform remarkable intellectual feats.