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  1. Health & Medicine

    Parasite gives a man cancer

    Tapeworms can kick parasitism up a notch to become cancer, a case in Colombia shows.

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  2. Science & Society

    Scientists find the intrigue in Earth’s dullest times

    New methods, coupled with new attitudes, are revising ideas about Earth's boring billion.

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  3. Science & Society

    Quantum spookiness, magnetic mysteries and more feedback

    Letters and comments from readers on quantum spookiness, Earth's magnetic field, and more.

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  4. Particle Physics

    Antiprotons match protons in response to strong nuclear force

    The first study of how antiprotons interact with each other reveals yet again that particles of antimatter behave just like their ordinary matter counterparts.