How Does the Sun Tan My Skin?
How Does the Sun Tan My Skin? Sunlight tans, or darkens, your skin by causing the skin to produce extra amounts of a skin coloring pigment c
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Freckles
What Causes Freckles?
What Causes Freckles? Freckles are caused by the brown skin pigment called melanin. All of us have some melanin in our skin. Usually, this b