Earth

  1. Environment

    Feedback

    Readers respond to "Solving soot," trade-offs of horn size for male Soay sheep and the huge galactic explosion story from 50 years ago.

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  2. Agriculture

    Fertilizer has staying power

    Nitrogen-based fertilizer may remain in the soil for eight decades, complicating efforts to reduce pollution from runoff into rivers.

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  3. Climate

    Tropics to launch into uncharted climate territory by 2038

    Global temperatures will take a permanent leap above historical bounds by 2047 if greenhouse gas emissions continue unabated, a simulation suggests.

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  4. Earth

    African dust once fertilized the Everglades

    Humans aren't the only source of nutrients for Florida’s wetlands. African dust may have fertilized the region thousands of years ago.

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  5. Earth

    Deep network

    The NEPTUNE observatory — a ring of six underwater research stations connected to the Internet with fiber optic cables — is the first online observatory to brave the depths of the abyss.

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  6. Earth

    Quake forms island in Arabian Sea

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  7. Climate

    Humans found guilty in climate change

    International panel’s confidence increases that society is responsible for global warming.

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  8. Oceans

    Greenland Sea warming faster than world ocean

    Deep water temperature of Greenland Sea rises 0.3 degrees Celsius in 30 years.

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  9. Earth

    Oxygen wafted into Earth’s atmosphere earlier than thought

    Date pushed back to 3 billion years ago, suggesting photosynthesis had evolved by then.

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  10. Environment

    Pregnant women carry fewer traces of flame retardants

    Class of toxins linked to IQ deficits dropped drastically in three years, a new study shows.

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  11. Earth

    Biggest volcano hulks deep

    Tamu Massif forms a broad, rounded dome rising about 4 kilometers from the seafloor and stretching 450 by 650 kilometers across.

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  12. Environment

    Cattle chemical can return in the night

    Steroid to beef up cows breaks down, but can reassemble under the right conditions.

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