Feature

  1. Health & Medicine

    Cells from fat mend bone, cartilage, muscle and even the heart

    Stem cells and other components of fat can be coerced to grow into bone, cartilage, muscle or to repair the heart.

    By Susan Gaidos
  2. Quantum Physics

    Ultrasmall engines bend second law of thermodynamics

    Car engines and batteries run because of the second law of thermodynamics, which appears to work, with just a little bending, for ultrasmall engines in the quantum realm as well.

    By Andrew Grant
  3. Physics

    Gravitational waves explained

    Colliding black holes send ripples through spacetime that can be detected here on Earth. What are these gravitational waves, and how did Advanced LIGO detect them?

    By Christopher Crockett
  4. Planetary Science

    Support grows for a return to ice giants Uranus and Neptune

    Thirty years ago, Voyager 2 cruised past Uranus and then on to Neptune.