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Why do your joints hurt when it’s cold? We asked a doctor.

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Hair samples reveal the benefits of lead regulation

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Why do your joints hurt when it’s cold? We asked a doctor.
Health

Why do your joints hurt when it’s cold? We asked a doctor.

February 3, 2026
Hair samples reveal the benefits of lead regulation
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Hair samples reveal the benefits of lead regulation

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Why do your joints hurt when it’s cold? We asked a doctor.

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Chess or video games—which actually makes you smarter? The answer may surprise you.

Chess or video games—which actually makes you smarter? The answer may surprise you.

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Why does chocolate turn white? It’s not mold.

Why does chocolate turn white? It’s not mold.

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Life

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Physics

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