‘A child could have done that’ is modern art’s most banal criticism, but in the case of Jackson Pollock, the cynics are actually right. The US artist of the abstract expressionist movement was the master of the drip painting, where he dribbled, scattered and flung colours onto a canvas laid on the floor. A new study has found that Pollock’s style is hard for adults to replicate, whereas children find it… child’s play. Can you tell if a painting was made by a child or an adult? And when it comes