We don’t need scientists to tell us that laughing is fun and makes us feel better. Research is verifying that humor has many of the positive effects that funny people have long suspected.

Researchers have found that you can even “act as if” you are feeling an emotion—say, happiness or irritation—by arranging your face in a smile or a frown, and you are likely to feel that emotion. In a classic study, participants were instructed to hold a felt-tip marker in their mouths in a way that caused their facial muscles to be formed into a smile or a frown. While holding the marker this way, they were asked to view comic strips and say how funny they found them. Those whose facial muscles were mimicking a smile found the same comics funnier than those whose facial muscles were set into a frown.

View the rest of the article on the Public Broadcasting Service website.