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  1. Health & Medicine

    Antibiotics could save nerves

    Penicillin and its family of related antibiotics may prevent the type of nerve damage that occurs in people with amyotrophic lateral sclerosis (ALS) and other diseases.

    By Christen Brownlee
  2. Animals

    Sparrows learn song from pieces

    Young white-crowned sparrows don't have to hear a song straight through in order to learn it; playing the song in mixed-up paired phrases will do.

    By Susan Milius
  3. Earth

    Really hot water

    Hot-water tanks can accumulate radioactive deposits from naturally occurring radioactive material.

    By Janet Raloff
  4. Earth

    Landscaping stones may pose risks to the environment

    Chemical analyses suggest that planting ornamental rock gardens in some cases may not be doing the environment any favors.