Here's Why Smiling with your eyes — commonly referred to as the Duchenne smile after 19th-century scientist Guillaume Duchenne — is considered the most authentic type of smile associated with ...

What are the different types of dimples? Discover the various places where dimples can form in the body and find out if these ...

Humans can produce thousands of distinct facial expressions – including 19 different types of smile, according to research by the American psychologist Paul Ekman. However, only one of these is ...