Earth

  1. Earth

    A feverish world

    The second of a two-part series on climate change.

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  2. Environment

    Polar ice feels the heat

    This is the first of a two-part series on global climate change.

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  3. Earth

    Salty, old and, perhaps, a sign of early life

    Exploring salt deposits, researchers unearthed the planet's oldest-known, complete molecules thought to have been made by living things.

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  4. Earth

    Deep history

    Scientists have gained new clues about when the Grand Canyon formed.

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  5. Earth

    Arctic melt

    There is less ice than ever recorded in the Arctic Ocean, and scientists are concerned.

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  6. Animals

    Eyes on the depths

    On a recent expedition to the Bahamas, scientists made new discoveries about how deep-sea animals see the world.

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  7. Earth

    The Rise of Yellowstone

    New evidence points to a recent, rapid rise of land in parts of Yellowstone National Park.

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  8. 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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  9. Environment

    Acid snails

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

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  10. Agriculture

    Flush-free fertilizer

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

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  11. Ecosystems

    Underwater jungles

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

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  12. 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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