Earth

  1. Climate

    Hot carbon storage

    New field studies show Africa’s tropical forests have stored carbon in recent decades.

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  2. Astronomy

    A green visitor makes its approach

    Comet Lulin, which passes closest to Earth on February 24, may be a sight for sore eyes.

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  3. Agriculture

    Predators zoom in on lice-infested salmon

    New research reveals another impact of fish farming on wild stocks.

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  4. Humans

    AAAS: Climate-friendly fish

    Many intangibles determine how big — or small — the carbon footprint is of that fish you're thinking about eating.

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  5. Health & Medicine

    MRSA has its day in the sun

    Beachgoers may be exposed to antibiotic-resistant microbe strain in sea and sand, but there appears to be no link to infection.

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  6. Earth

    AAAS: Climate-friendly dining … meats

    The carbon footprints of raising livestock for food.

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  7. 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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  8. 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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  9. 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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  10. 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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  11. Space

    Cosmic mystery

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

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  12. Earth

    First wave

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

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