We all smile. It’s a universal sign of happiness, agreement, and warmth. From a quick grin with a stranger to a heartfelt laugh with loved ones, smiles grease the wheels of social interaction.

How to spot a fake smile from the real thing - The difference between the two is a surprising blend of facial anatomy, neurology and emotional authenticity. advertisement. The Independent.

Science Says a 20-Second Fake Smile Reduces Feelings of Anxiety, Tension, and Even Fear Oddly enough, smiling can make you a little healthier, too. EXPERT OPINION BY JEFF HADEN @ JEFF_HADEN ...