human
Is there any way to tell how old a person is without asking them?
assistant
Yes, there are several ways. One of the most popular methods is called the Facial Maturity Estimation method (FME). This method uses facial features such as the size of the eyes and shape of the face to estimate age. Another method is called the Body Mass Index (BMI) method, which estimates age by comparing body mass index with an average for each age group.