Graph: Distribution of Happiness (IMAGE) University of Vermont Caption Whether it's Arabic movie subtitles, books in Chinese, Spanish Twitter, German websites, or music lyrics in English -- a study published in the Proceedings of the National Academy of Sciences, by scientists at the University of Vermont and The Mitre Corporation, found a clear positive bias in human language. In other words, we -- humanity -- "use more happy words than sad words. Credit Courtesy Dodds et al., <i>PNAS</i> Usage Restrictions with coverage of associated article License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.