Earth

  1. Earth

    AAAS: Climate-friendly dining … meats

    The carbon footprints of raising livestock for food.

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  2. Climate

    The hidden costs of better fuels

    Whether crop-based biofuels will reduce greenhouse gas emissions depends on how, and where, they're grown.

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  3. Planetary Science

    Earth may be home to unearthly life

    No need to look on other planets for new forms of life — weird life could exist right here on Earth.

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  4. Humans

    AAAS: March of the Hungry Penguins

    Patagonian penguins have become sentinels of climate change and human impacts on the marine world.

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  5. Agriculture

    AAAS: Stress Can Make Plants More Nutritious

    People who aren't veggie lovers might want to seek out types of produce that deliver an especially big nutrient bang for the gram.

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  6. Space

    Cosmic mystery

    High-energy invaders from space could signal a nearby pulsar, or perhaps dark matter.

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  7. Earth

    First wave

    The presidents of two island nations draft escape plans, anticipating sea level rise.

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  8. Climate

    Plumes of arctic haze traced to Russia, Kazakhstan

    Smoke from forest fires, agricultural burning may be substantial part of springtime plumes.

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  9. Chemistry

    Supergoo Erases ‘Monument-al’ Nuclear Fallout

    From disposable diapers comes a technology that can be used to extract radionuclides off of the porous surfaces of buildings.

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  10. Climate

    Winter birds shift north

    More than 170 common North American species are wintering farther north than they did in the past.

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  11. Ecosystems

    Flowering plants welcome other life

    When angiosperms diversified 100 million years ago, they opened new niches for ants, plants and frogs.

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  12. Earth

    California may yet get the first greenhouse gas limits for cars

    President Obama decides to revisit a controversial decision made less than a year ago by his predecessor.

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