Feature

  1. Life

    Imperfect mimics

    Reprogramming techniques may not produce exact embryonic stem cell replicas.

    By Tina Hesman Saey
  2. Astronomy

    Black hole silhouettes

    Scientists attempt to image a shadow and its tumultuous ring.

    By Charles Petit

  3. Unnatural selection

    Chemists build proteins with parts not in the typical toolkit.

    By Laura Beil

  4. Fire & Ice

    Volcanoes and frozen lands make an explosive combo.

    By Alexandra Witze

  5. Rust Never Sleeps

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

    By Rachel Ehrenberg

  6. A New View of Gravity

    Entropy and information may be crucial concepts for explaining roots of familiar force.