Some musical science. Research from Dartmouth College in the US reckons that whether or not a tune is ‘catchy’ may depend on which part of the brain the notes activate. Professor Peter Janata played a group of volunteers a series of keys and watched the way the brain responded. He told the BBC: "One chunk of the brain was responding when the melody was in G major or E minor and another part of the circuit was responding when it was in E major.”
He explained his work was attempting to find the science behind the art of making music that people enjoy. "I think composers are masters at manipulating music. I think music is a marvellous mystery and the brain is also a marvellous mystery, so ultimately we are just trying to explain two wonders of nature and how they react."