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  1. Health & Medicine

    How some ticks protect themselves from deadly bacteria on human skin

    A gene that ticks acquired from bacteria 40 million years ago may help the arachnids keep potential pathogens at bay while feeding on blood.

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  2. Science & Society

    Hear from people taking action against COVID-19

    Researchers, a health care worker, a clinical trial volunteer and others share their experiences during the pandemic.

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  3. Space

    Top 10 questions I’d ask an alien from the Galactic Federation

    An interview with E.T. would be a journalist’s dream, but it’s not very likely.

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  4. Earth

    In the past 15 years, climate change has transformed the Arctic

    Accumulating evidence and new tools have helped scientists better understand how the Arctic is changing, but the pace has been faster than expected.