Why do people get darker in the sun?

     Why do people get darker in the sun? This is a question i had for years and can now answer. There is a chemical in your skin called Melanin. When you go out in the sun this chemical gets darker with the harmfull uv rays of the sun. The Melanin is located in the epidermis.
     The skin is made up of three different sections The Epidermis, The Dermis, and The Subcutaneous fatty tissue. In the Epidermis there is two main chemicals Melanin Granules which is responsible for making people darker. Also in the Epidermis is the Melanocytes. In the Dermis is the oil gland, the nerve, and the sweat gland.
    


            People with the darker skin generaly live closer to the equartor. If you live near the equator the suns naturally bad for you radiation is most intense. Melanin acts as a sheild so that the suns radiation doesnt get through. It also prevents sun burn damage. Which could cause Mutation to the skins DNA and that could cause different kinds of cancers. The harmfull radiation rays increse durnig sumer and decreases during winter.