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  1. Readers respond to Lyme disease, fossil teeth and a Tesseract look-alike

    Readers had questions and comments on Lyme disease prevention, speciation, and a mysterious uranium cube.

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  2. Why this warmer world is not just a passing phase

    Editor in Chief Nancy Shute discusses climate change and the uncertainty of science.

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  3. Anthropology

    Ancient Maya warfare flared up surprisingly early

    Extreme conflicts broke out well before the decline of the Maya civilization, researchers say.

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  4. Earth

    A new map is the best view yet of how fast Antarctica is shedding ice

    Stitching together data from several satellite missions allowed scientists to create the most comprehensive map of Antarctic ice flow ever.