Feature

  1. Life

    The unusual suspects

    With no obvious culprit in sight, geneticists do broader sweeps to identify autism’s causes.

    By Susan Gaidos
  2. Life

    Imperfect mimics

    Reprogramming techniques may not produce exact embryonic stem cell replicas.

    By Tina Hesman Saey
  3. Astronomy

    Black hole silhouettes

    Scientists attempt to image a shadow and its tumultuous ring.

    By Charles Petit

  4. Unnatural selection

    Chemists build proteins with parts not in the typical toolkit.

    By Laura Beil

  5. Fire & Ice

    Volcanoes and frozen lands make an explosive combo.

    By Alexandra Witze

  6. Rust Never Sleeps

    A new flare-up in an age-old battle between wheat and a fungal killer.