Mother Teresa said, 'We shall never know all the good that a simple smile can do.' Enjoy a smile and a chuckle while playing this exhibition.

image by Mateus Campos Felipe

A smile is formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes which raises the cheeks and forms crow’s feet around the eyes, an action known as a Duchenne smile.

Humans are born with the ability to smile, it is not something that we learn. For instance, even blind babies are able to smile.

The Pan Am smile, also known as the “Botox smile”, is the name given to a fake smile, in which only the zygomatic major muscle is voluntarily contracted to show politeness.