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  1. Life

    Dangerous dinos came out after dark

    Predatory dinosaurs probably stalked the night, scientists say.

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  2. Space

    XENON100 fails to find dark matter

    A hundred days of solitude for an experiment designed to rendezvous with the universe's missing mass put new limits on the elusive material's properties.

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  3. Life

    Life

    Salamander's algal partners, tool-using capuchins, a beneficial bacterial infection and more in this week's news

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  4. Health & Medicine

    Body’s immune protein fights breast cancer

    A new study clarifies the role of interleukin-25 in stalling malignancy, possibly clearing the way for new drug development.

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  5. Life

    Antarctic lake hides bizarre ecosystem

    Bacterial colonies form cones similar to fossilized examples of Earth’s early life.