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 ...

Can you spot if someone is faking a smile? Here’s how to tell - What makes a smile fake or sincere is a combination of anatomy, neurology and emotional authenticity ...

Yet the challenge remains: how do you fake authenticity? Engineers can program a smile, but without the micro-contractions around the eyes, many of these expressions still seem disingenuous.

Ever noticed how there are basically two types of smiles: a genuine smile and a fake one? This distinction has been of interest to researchers for quite some time now. In fact, the genuine smile ...