Feature

  1. Health & Medicine

    How Zika became the prime suspect in microcephaly mystery

    New evidence in human cells strengthens the case against Zika in Brazil's microcephaly surge, but more definitive proof could come this summer from Colombia.

    By Meghan Rosen
  2. Health & Medicine

    Efforts to control mosquitoes take on new urgency

    The major mosquito that is spreading Zika virus has quirks that make it one of the toughest to fight.

    By Susan Milius
  3. 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
  4. 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.