Feature

  1. Astronomy

    Dark Influence

    A study of galaxy clusters tests whether dark matter particles can collide with each other, while other observations show that dark matter doesn't behave as expected near the centers of galaxies.

    By David Shiga
  2. Math

    Navigating Celestial Currents

    Mathematicians are creating an atlas of solar system highways along which spacecraft can coast using no fuel.

    By Erica Klarreich
  3. Health & Medicine

    The Race to Prescribe

    Race-based medicine could be a stepping-stone to the higher goal of targeting medicines toward the genetics of individual patients, but some researchers are troubled by the implications of practicing medicine according to patients' racial identities.

    By Ben Harder

  4. Code of Many Colors

    Researchers have yet to find markers for race in the genome, but understanding the biology underlying perceptions of race could have dramatic social and personal consequences.