You’ve probably heard the claim that it takes more muscles to frown than to smile. It’s usually framed as a feel-good reason to turn your frown upside down – less effort, more joy.

It is time for Americans to remember the Celtic proverb, "Beware the Saxon's smile." THOMAS WIXTED. Brooklyn, June 10, 1900. Advertisement ...

You’ve probably heard the claim that it takes more muscles to frown than to smile. It’s usually framed as a feel-good reason to turn your frown upside down – less effort, more joy.

She added, "I cannot smile anymore," and demonstrated on camera saying, "Look, this is as big as I can smile." Trainor’s brother, Ryan, admitted he teased her a bit about her inability to smile ...

NPR's Ayesha Rascoe speaks to Sebastian Korb, a senior lecturer in psychology at the University of Essex, about a new study showing that even forcing a smile can improve a person's mood.