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  1. Physics

    The world’s fastest microscope makes its debut

    Using a laser and an electron beam, the microscope can snap images of moving electrons every 625 quintillionths of a second.

    By Skyler Ware
  2. Earth

    ‘Turning to Stone’ paints rocks as storytellers and mentors

    Part memoir, part geology explainer, Marcia Bjornerud’s latest book explores the hidden wisdom of Earth’s rocks.

    By Alka Tripathy-Lang
  3. Space

    The historic ‘Wow!’ signal may finally have a source. Sorry, it’s not aliens

    One of the best possible signs of extraterrestrial communication may have an astrophysical explanation — albeit a weird one.

    By Lisa Grossman
  4. Astronomy

    The nearest midsized black hole might instead be a horde of lightweights

    Astronomers recently reported that the Milky Way star cluster Omega Centauri hosts an elusive type of black hole.