Feature

  1. Pearls Unstrung

    For a while, the Great Lakes weren’t connected by rivers and Niagara Falls was just a trickle.

    By Sid Perkins

  2. Smart from the start

    Animal embryos get some respect for their survival skills.

    By Susan Milius
  3. Planetary Science

    Stars go kaboom, spilling cosmic secrets

    Astronomers hope type 1a supernovas will help in quest to explain dark energy.

    By Ron Cowen

  4. Venom hunters

    Scientists probe toxins, revealing the healing powers of biochemical weapons.

    By Laura Sanders

  5. When Humor Humiliates

    For gelotophobes, even good-natured laughter can sound a lot like ridicule.

    By Susan Gaidos

  6. The Biofuel Future

    Scientists seek ways to make green energy pay off.