Scientists have discovered a link between taking short naps and happiness. While sleep in general boasts a wide range of health benefits from increasing productivity to protection against heart disease, it now turns out that brief napping has some pluses all its own. The study, which was conducted for the Edinburgh International Science Festival, saw 1,000 participants answer psychological questions in an online survey, which asked for details of napping habits. According to their responses, nappers were then given a happiness score. It showed that 66 percent of short nappers reported feeling happy compared with 56 percent of long nappers, highlighting a significant association between short naps and an improved sense of wellbeing.