<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why does the sun make our hair lighter but make our skin darker?
<|assistant|>
The sun makes our hair lighter because UV radiation from the sun is absorbed by the colorless molecules in the hair, resulting in broken chemical bonds which give the hair a lighter color. However, UV radiation from the sun is mainly absorbed by the melanin in the skin, which is the dark pigment, resulting in a darker complexion.