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  1. Physics

    Science of friction is a bit rough

    In lab experiments, physicists trying to understand earthquakes are bumping up against the limitations of existing theory.

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  2. Life

    Genes & Cells

    A look at how ovarian cancer spreads, plus clues to aging and immune links to cancer in this week’s news.

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  3. Planetary Science

    Messages from Mercury

    The latest data from a NASA spacecraft give compositional clues and reveal craters that could hold frozen water

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  4. Humans

    Numbers suggest mating with humans might have led to Neandertals’ demise

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  5. From the Archive: Carp eat other fish out

    History repeats with another round of carp invasion.