Well, not just your smile, even how you pronounce certain words ... Though the labiodental sounds have contributed to speech and human communication, it also comes with certain drawbacks.

Would this show up as a facial signal, like the smile of a human? It's Not Easy for a Dog to Smile The first thing to note is that there is a limitation on the range of facial expressions produced ...

The shift from tough, fibrous foods to processed grains and softer meals after the rise of agriculture reshaped human jaws, resulting in overbites. This change played a major role in language ...

Credit: Alexis nedd / mashable The main game of Pokémon Smile involves following a series of onscreen visual prompts that correspond with sections of a human mouth, presumed to be the user’s.