Published on Sunday, 17 May 2009 19:00 | 
Not only is laughter a great tonic, argues evolutionary theorist Alastair Clarke, it also plays a vital role in the development of our intellectual, perceptual and problem-solving abilities
Not only is laughter a great tonic, argues evolutionary theorist Alastair Clarke, it also plays a vital role in the development of our intellectual, perceptual and problem-solving abilities