Earth

  1. Life

    When giant fleas roamed

    Fossils show ancient insects grew as long as 2 centimeters.

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  2. Life

    Sardine fishery may be in peril

    Cool ocean cycle, population slide evoke collapse of Pacific resource in the late 1940s.

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  3. Earth

    Less sea ice brings more snow

    A melting Arctic shifts atmospheric patterns across much of the Northern Hemisphere, causing severe weather elsewhere.

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  4. Health & Medicine

    2012 AAAS Meeting

    Highlights from the American Association for the Advancement of Science annual meeting in Vancouver, February 16-20.

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  5. Climate

    Carbon dioxide breaking down marine ecosystems

    Scientists capitalize on 'natural’ experiment to chronicle how ecosystems will change as oceans continue to acidify.

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  6. Humans

    Oceans set stage for human evolution

    Temperature changes off the coast dried out East Africa and allowed grasslands to spread starting around 2 million years ago.

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  7. Earth

    Natural gas wells leakier than believed

    Measurements at Colorado site show methane releases are twice as high as previously estimated.

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  8. Humans

    Food exports can drain arid regions

    Many dry regions ‘export’ large amounts of water in the form of agricultural products.

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  9. Earth

    Making Waves

    Japanese quake gave scientists an unprecedented look at a big tsunami.

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  10. Earth

    BPA fosters diabetes-promoting changes

    Exposures typical of the general public are enough to alter insulin secretion.

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  11. Humans

    Numbers warn of looming collapses

    Mathematical tools help researchers predict when systems are about to change dramatically.

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  12. Animals

    Classic sooty-moth tale bolstered by new results

    A scientist’s six-year backyard experiment strengthens the scenario for evolutionary changes due to industrial pollution.

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