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  1. Earth

    Where humans go, pepper virus follows

    Plant pathogen could help track waters polluted with human waste.

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  2. Breaking the Speed Limit

    Studies examine physiology and technology to better foresee the ultimate edge of human performance.

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  3. Botanical Whales

    Adventures in the Tortugas reveal that seagrass fields need saving too.

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  4. Climate

    Climate might be right for a deal

    The upcoming Copenhagen negotiations will take steps toward an international, climate-stabilizing treaty.

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  5. From fringe to electromicrobiological mainstream

    Trained as a microbiologist, Ken Nealson pursues many interdisciplinary endeavors. He was a pioneer in the field of geomicrobiology and has worked on astrobiology and microbial fuel cells.