10 surprising health facts

An hour’s sleep could make you happier than $60,000: What would it take to make you happier? A better job? A larger salary? Well, according to a US study by psychologist Daniel Kahneman and his colleagues, an increase in household income actually has little effect on your daily mood. In fact, the study suggests that getting one extra hour of sleep each night does more for your daily happiness than a $60,000 (£38,000) raise! less