Feature

  1. Physics

    Primordial Nukes

    The rocky remains of nuclear reactors that formed spontaneously in African uranium deposits 2 billion years ago are yielding striking new details about their operation as well as signs that a fundamental aspect of the universe may have once been stronger than it is today.

    By Peter Weiss
  2. Materials Science

    Venetian Grinds

    Venetian Renaissance artists, renowned for their vibrant colors, mixed powdered glass with their paints in an attempt to expand their palettes and create unique optical effects.

    By Alexandra Goho
  3. Health & Medicine

    A Fishy Therapy

    Shark cartilage continues to be sold to fight cancer, even though its efficacy has not been confirmed by any major U.S.