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  1. The inner lives of animals

    Editor in Chief Nancy Shute discusses how scientists are beginning to study animals’ emotions and personalities — from joy to individual temperament.

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  2. Animals

    How Greenland sharks defy aging

    When it comes to bucking the biological ails of aging, humans could learn something from Greenland sharks.

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  3. Health & Medicine

    It masquerades as malignant. But this bone-covered tumor is benign

    Scientists have described a novel, yet benign bone-covered growth's characteristics for doctors, so patients don't receive unnecessary chemotherapy.

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  4. Physics

    Physics theories about the multiverse are stranger than fiction

    Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many.