17-01-04 Anthony Stocks, chairman and professor of anthropology at Idaho State University, responds: The evolution of smiles is opaque and, as with many evolutionary accounts of social behavior, fraught with just-soism. Among human babies, however, the tooth...

16-06-27 Insects have evolved diverse types of camouflage that have played an important role in their evolutionary success. Debris-carrying, a behavior of actively harvesting and carrying exogenous materials, is among the most fascinating and complex behavio...

15-04-19 People who are generally impatient, or who get bored or frustrated easily, are more likely to engage in repetitive body-focused behaviors such as skin-picking, nail-biting or eyelash-pulling, the researchers found. 研究人员发现，那些一般缺乏耐心、容...