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.

Switch to the light mode that's kinder on your eyes at day time. Lady Gaga & Bruno Mars’ “Die With A Smile” remains a radio force, notching a second week atop the Mediabase pop radio listing while ...