World Smiles Back

Close up photo of a women's smile and dark hair

  Smile, and the world smiles back? This is Sandra Tsing Loh with the Loh Down on Science, saying… Cheer up! You look so much better when flaunting those pearly whites. But does smiling REALLY lift our spirits? Fernando Marmolejo-Ramos from the University of South Australia and colleagues wondered. Does

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