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  1. Space

    Astronomers have found the edge of the Milky Way at last

    Computer simulations and observations of nearby galaxies let astrophysicists put a firm number on the Milky Way's size.

    By Ken Croswell

  2. Readers weigh in on coronavirus, cats and more

    By Science News Staff

  3. When coronavirus is both work and worry

    Our editor in chief Nancy Shute discusses what it's like to cover the current coronavirus pandemic.

    By Nancy Shute
  4. Health & Medicine

    Why some heart patients may be especially vulnerable to COVID-19

    Researchers don’t yet know if the way the coronavirus enters cells may have something to do with the risks to the heart.