Life trivia:Laughing often helps to prolong life

A 15-year study in Norway shows that regular smiles can make you live longer and healthier.

The research team found that men and women with a sense of humour were less likely to die from infection, and women who often laughed were less likely to die from heart disease.

This may be because the smile is often open to inhibit the secretion of stress hormones and improve the immune system.