As reported the Daily Mail, researchers from University College London have confirmed, that the average life expectancy for a happy and positive-minded people more, than normal people and those prone to depression. Based on the five-year observations over four thousand people aged 50 to 80 years, it was concluded, that the average life expectancy for optimists, almost 35% higher, than the average positivity of the lives of those people, which are susceptible to bad moods and depression.