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Gemstone of human personality: The smile

The science of smiling was initiated by Charles Darwin. He noticed that the causes, consequences, and manifestations of smiling are universal, whereas many other nonverbal body language behaviors such as gesture or touch differ between cultures and are therefore probably learnt. People express their emotions through smile and also it plays an important role in facial beauty. In this article, we will discuss various patterns of smile and factors influencing esthetics of smile.