Earth's Systems

  1. Environment

    Does lightning sculpt mountains?

    A new study sparks debate about how much rubble on a mountainside has been blasted loose by powerful bolts from the sky.

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  2. Earth

    Explainer: Ice sheets and glaciers

    Ice sheets and glaciers give scientists clues about climate change.

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  3. Earth

    Explainer: Antarctica, land of lakes

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  4. Environment

    Explainer: All crude oil is not alike

    Crude oil comes in conventional and unconventional types.

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  5. Earth

    How Earth’s surface morphs

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  6. Climate

    Explainer: Why a tornado forms

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  7. Climate

    Explainer: El Niño and La Niña

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  8. Chemistry

    Explainer: Ocean acidification

    Here’s why shellfish and other animals in the sea suffer when the ocean is forced to absorb too much carbon dioxide.

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  9. Climate

    Watching our seas rise

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  10. Environment

    Ozone hits a new low

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  11. Earth

    Big rocks’ balancing acts

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  12. Earth

    Tsunami’s trek traced in the sky

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