Earth

  1. Environment

    Fear Matters

    Halloween can scare kids and make them act strange. But animals and ecosystems respond to fear every day of the year.

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  2. Environment

    Acid snails

    Changing chemistry in the world's oceans could affect the ability of a snail to defend itself.

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  3. Agriculture

    Flush-free fertilizer

    Scientists have found a new use for human urine — as a potent crop fertilizer.

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  4. Ecosystems

    Underwater jungles

    Cold-water-loving kelp forests may be surprisingly abundant in the tropics.

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  5. Environment

    Lessons from a lonely tortoise

    In the Galapagos Islands, scientists are struggling to save some of the most endangered creatures in the world.

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  6. Animals

    Polar bears in trouble

    Melting ice is bad news for polar bears that live in northern Alaska.

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  7. Climate

    The best defense is a good snow fence

    Science fair superstar Erica David shows how fences that trap snow can help the environment.

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  8. Climate

    Catching some rays

    In a world with increasing energy needs, scientists are turning to plants for help in using solar power.

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  9. Climate

    A stormy history

    The number of severe hurricanes in recent years may be normal, it turns out.

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  10. Environment

    Where have all the bees gone?

    More than one-fourth of the honeybees in the United States have disappeared since last fall, and scientists are trying to figure out why.

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  11. Climate

    Earth’s poles in peril

    Scientists are paying increased attention to changes in Earth's polar regions, which are in danger because of global warming.

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  12. Animals

    Life on the Down Low

    The first scientific survey of organisms in the deep waters off Antarctica has discovered lots of life.

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