News

  1. Particle Physics

    This is the first known particle with four of the same kind of quark

    A weird four-quark particle could be a unique testing ground for the strong force that governs how quarks stick together.

    By Maria Temming
  2. Health & Medicine

    How making a COVID-19 vaccine confronts thorny ethical issues

    COVID-19 vaccines will face plenty of ethical questions. Concerns arise long before anything is loaded into a syringe.

    By Bethany Brookshire
  3. Planetary Science

    Some exoplanets may be covered in weird water that’s between liquid and gas

    “Supercritical” water, a corrosive substance used to break down toxic waste on Earth, coats some small worlds around other stars, simulations suggest.