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Different races have distinct physical characteristics, and before the winds of political correctness blew in, this was absolutely correct knowledge.
One very typical example is the "Carabelli's tubercle," which refers to an enamel cusp often found near the cervical margin on the lingual surface of the first molars in Caucasians. Carabelli's tubercle is actually an accessory cusp, and some Caucasians also have it on their second and third molars, but it is extremely rare in people of color.
The shovel-shaped incisors, which appear with a 90% probability among Asian people, are also rare in both Caucasians and people of African descent.
Many people go to hospitals to have bone-shaping surgeries, like cheekbone reduction, precisely because they seek to distinguish their facial features through changes in their bones.
