News

  1. Astronomy

    Astronomers are puzzled over an enigmatic companion to a pulsar

    The strange entity has a mass between that of a neutron star and a black hole. It’s either one or the other or something else entirely.

    By Adam Mann
  2. Life

    How disease-causing microbes load their tiny syringes to prep an attack

    Tracking individual proteins in bacterial cells reveals a shuttle-bus system to load tiny syringes that inject our cells with havoc-wreaking proteins.

    By Elise Cutts
  3. Chemistry

    Here’s how tardigrades go into suspended animation

    A new study offers more clues about the role of oxidation in signaling transitions between alive and mostly dead in tardigrades.

    By Tina Hesman Saey
  4. Animals

    Some mysteries remain about why dogs wag their tails

    Wagging is a form of communication, with different wags meaning different things, but scientists know little about the behavior’s evolution in dogs.