Racial differences refer to the variations in physical characteristics, such as skin color, hair type, and facial features, that are often associated with different groups of people. These differences arise from genetic variations and adaptations to diverse environments over thousands of years. While these physical traits can be noticeable, they do not determine a person's abilities, intelligence, or worth. Social constructs, such as race and ethnicity, often influence how individuals are perceived and treated, leading to stereotypes and biases that can impact society in various ways.