Feature

  1. Health & Medicine

    Bad Breath

    New studies detail how the invisible particles that pollute the air can damage heart, lungs and genetic programming.

    By Janet Raloff
  2. Climate

    Fire

    Understanding long-term changes in wildfire patterns challenges scientists from multiple disciplines.

    By Solmaz Barazesh
  3. Physics

    Microswimmers make a splash

    Researchers study secrets of microbes' locomotion and how to mimic that movement.

    By Laura Sanders
  4. Humans

    Seeking genetic fate

    Personal genomics companies offer forecasts of disease risk, but the science behind the packaging is still evolving.

    By Patrick Barry

  5. The iron record of Earth’s oxygen

    Scientists are decoding the geological secrets of banded iron formations.