A fascinating book is Calvin's Throwing Madonna
The idea is that our ancestors adopted throwing stones to hunt for food. In order to get accuracy it is necessary to release the stone at a precise time. This requires lots of neurons working together. Hence our large brains. He also discusses handedness.
And why did not monkeys learn the same way? Evolutionists really are grasping at straws when it comes to explain man. Let me ask you this one, what is the necessity of art? How come man is the only species that does art? Let's also note that art has been found from the earliest traces of homo sapiens in the caves of Southern France and Northern Spain.