<|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 can make our hair lighter for a few reasons. When the skin cells are exposed to UV radiation from the sun, they produce more melanin in order to block the sun's damaging rays. Since melanin is also the pigment responsible for giving hair its color, more of it leads to lighter hair. However, the same radiation causes our skin to produce less melanin, making our skin darker.