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  1. Tech

    The people’s pulsar

    Thousands of volunteers help discover a neutron star by donating the processing power in their idle home computers.

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  2. Life

    New titi monkey, at last

    Travel risks in parts of Colombia had kept primatologists out for decades.

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  3. Health & Medicine

    Delivering a knockout

    Scientists have finally succeeded in genetically engineering rats.

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  4. Haiti quake reveals previously unknown fault

    Scientists say the risk of future temblors in region is unclear.

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  5. Life

    How salmonella helps kill cancer cells

    A bacterial foe gives the immune system a boost to seek and destroy melanoma.