text: Facial expressions are a very important detail in every individuals life. Reading someones facial expression can tell you what you need to do next. For example in paragragh 4 it says " The facial expressions for each emotion are universal," observes Dr. Huang, " even though individuals oftem show varying degrees of expression" (like not smiling as broadly)." So when your friends mad and doesnt want you near her or shes just confused, now you'll know your next step.