Uncategorized

  1. Health & Medicine

    One number can help explain why measles is so contagious

    The basic reproduction number, or "R naught," of measles shows how contagious the disease is compared with other pathogens.

    By Helen Thompson
  2. Physics

    A new optical atomic clock’s heart is as small as a coffee bean

    Optical atomic clocks are extremely good at keeping time, and they’re on their way to becoming pocket watches.

    By Maria Temming
  3. Life

    How bacteria nearly killed by antibiotics can recover — and gain resistance

    A pump protein can keep bacteria alive long enough for the microbes to develop antibiotic resistance.

    By Tina Hesman Saey
  4. Earth

    This iconic Humboldt map may need crucial updates

    A seminal, 212-year-old diagram of Andean plants by German explorer Alexander von Humboldt is still groundbreaking — but outdated, researchers say.