Over the past 50 years, the lyrics of popular songs in the U.S. have become simpler, more negative, and contain more stress-related words, according to an analysis published in Scientific Reports. The ...

Over five decades, popular songs in the U.S. and Germany have become more self-focused—as indicated by the use of pronouns such as "I," "me" and "mine"—while no such trend was seen for the most ...