The greatest biologist, Charles Darwin made a big mistake. He mentioned that the differences among the variety of skin colors didn't attribute to climates. As most people know, the fact is that skin colors unquestionably vary according to our environments.
Strictly speaking, the intensity of ultraviolet radiation governs the degree of skin pigmentation. This is why people who live around the equator have dark pigmented skin and the degree of pigmentation becomes lighter as they go toward the poles. At first, our ancestors, who lived around equator, got melanin to protect their skin. Then as people dispersed into high latitudes, they decreased its amount in accordance with the decline of the intensity of ultraviolet radiation. In short, this differences are the proof of evolution.
Hence, by just looking at our skin, we can easily recognize our evolution. As this speaker mentioned, it is wonderful thing. After watching this video, I thought people really shouldn't discriminate others by their colors of skin, because this differences are gifts from our ancestors.
Strictly speaking, the intensity of ultraviolet radiation governs the degree of skin pigmentation. This is why people who live around the equator have dark pigmented skin and the degree of pigmentation becomes lighter as they go toward the poles. At first, our ancestors, who lived around equator, got melanin to protect their skin. Then as people dispersed into high latitudes, they decreased its amount in accordance with the decline of the intensity of ultraviolet radiation. In short, this differences are the proof of evolution.
Hence, by just looking at our skin, we can easily recognize our evolution. As this speaker mentioned, it is wonderful thing. After watching this video, I thought people really shouldn't discriminate others by their colors of skin, because this differences are gifts from our ancestors.
No comments:
Post a Comment