Most Helpful Girl
Do you mean mixed people are some ethnic groups.
People of darker skin age better because they're skin is made to withstand areas of high heat and sun. Black people have black skin because we come from a sunny climate and it's more resistant against burning than white skin.
Now that we no longer spend that much time out in the sun our skin again is less level. Because we're less likely to get skin damage from the sun our skin doesn't wrinkle as much (75% of wrinkle, discoloration and age spots are caused by the sun)0