Give us a smile

Women smile more often and men frown more often, but this could be due to cultural expectations, suggests research. The study, A large-scale analysis of sex differences in facial expressions, published in PLOS One, builds on prior evidence suggesting women smile more often than men, but considers a greater variety of facial expressions, revealing complex gender patterns. The US researchers used new automated facial coding technology to analyse the expressions of 2,106 people from France, Germany, China,...