the.com/smiling
The face's oldest handshake, deployed in everything from joy to deep discomfort.
means Curving the mouth upward, usually to signal happiness, friendliness, or social ease.
from From Middle English smilen, likely Scandinavian roots, cousin to the Old Norse smila — itself tied to wonder and marvel.
Muscle mathUses up to twelve facial muscles at once.
Duchenne tellReal ones crinkle the eyes; fake ones don't.
Born readyBlind infants smile without ever seeing one.