We are the most distinguished because we look a lot diff from other races. Our skin color can range from very light skin (pale) to extremely dark skin. Other groups of people don't have as far as a range and white people really don't have a range period. Our hair texture is different from the rest of the world. Asians, native Americans, Mexicans, whites, etc all have basically straight hair or close to it.
***This info below is from an educational video from smithsonian......
According to some of the history vids I've seen. Africa is the mother land and peoples skin started to lighten overtime as they moved further from the equator because darker skin is a natural skin protectant from the sun but it's not needed as much the further u move away from the equator.
Now that people of all colors are starting to live all over this has kind of effected people's skin. This is why so many white people are getting skin cancers. Because their skin is not naturally designed for hotter climates. If you notice. They require more SPF than black people. They have more skin cancer and there skin wrinkles more. This is all due to sun rays mostly.