Feature

  1. Chemistry

    Chemistry of Colors and Curls

    Chemists are using new technology and experiments to discover how hair becomes damaged and how to protect it.

    By Jessica Gorman
  2. Ecosystems

    Wanted: Reef Cleaners

    Nearly 18 years after a near total die-off of algae-grazing urchins in the Caribbean, those herbivores are poised for a comeback—which could help save area corals.

    By Janet Raloff
  3. Health & Medicine

    Vaccine Verity

    Widely publicized concerns about vaccination leading to autism, multiple sclerosis, and diabetes have not been borne out by research.

    By Damaris Christensen
  4. Paleontology

    A Ticklish Debate

    Paleontologists engaged in a contentious debate about the origins of feathers often reach interpretations that are poles apart, and they defend their views with fervor.