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  1. Earth

    When trees grew in Antarctica

    Fossils of trees that grew in Antarctica millions of years ago suggest a growth pattern much different than modern trees.

    By Sid Perkins
  2. Earth

    Earthquake history recorded in stalagmites

    Where stalagmites start and stop in caves could offer more precise clues about when major earthquakes have hit (and could again hit) the Midwest.

    By Sid Perkins
  3. Health & Medicine

    Nobel Prize in medicine given for HIV, HPV discoveries

    Three Europeans recognized for linking viruses to AIDS, cervical cancer.

    By Nathan Seppa
  4. Physics

    Charging up fuel injection

    A new device uses an electric field to increase cars’ gas mileage.