Notebook

  1. Animals

    A researcher reveals the shocking truth about electric eels

    A biologist records the electrical current traveling through his arm during an electric eel’s defensive leap attack.

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  2. Environment

    Air pollution takes a toll on solar energy

    Dust and other tiny air pollutants can reduce solar energy output by as much as 25 percent in parts of the world.

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  3. Tech

    50 years ago, West Germany embraced nuclear power

    In 1967, Germany gave nuclear power a try. Today, the country is trading nukes for renewables.

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  4. Climate

    Rising temperatures threaten heat-tolerant aardvarks

    Aardvarks may get a roundabout hit from climate change — less food.