A passenger spotted smiley faces drawn on a plane's wing. The traveller, seated by the window, noticed two cheerful images sketched on the dusty flap located on the lower rear part of the aircraft's ...

The true face of Beethoven has been revealed - almost 200 years after his death. Researchers have created the first 3D reconstruction of Beethoven's head using skull analysis. The model shows ...

But what is it about a smile that makes it feel sincere or fake? The answer lies in a blend of facial anatomy and emotional authenticity.