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  1. Smart from the start

    Animal embryos get some respect for their survival skills.

    By Susan Milius
  2. Planetary Science

    Stars go kaboom, spilling cosmic secrets

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

    By Ron Cowen

  3. Venom hunters

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

    By Laura Sanders

  4. Tackling toxicology and environmental health

    In January, toxicologist Linda S. Birnbaum became director of the National Institute of Environmental Health Sciences, home to the National Toxicology Program, in Research Triangle Park, N.C. Birnbaum recently spoke with Science News writer Rachel Ehrenberg. What areas would you like to see the institute zoom in on? LINDA S.