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  1. Earth

    Rare earth mining may be key to our renewable energy future. But at what cost?

    We take you inside Mountain Pass, the only rare earth mine in the United States.

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  2. Health & Medicine

    Why it’s easier to catch a cold, the flu or COVID in the winter

    Low humidity protects viruses and cold temperatures may blunt some immune responses, making viral infections like colds, flu and COVID-19 more likely.

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  3. Planetary Science

    Methylated gases could be an unambiguous indicator of alien life

    On Earth, methylated gases are produced by organisms cleaning up their environment — and by little else. The same might be true on some exoplanets.