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  1. Health & Medicine

    Elderly cats with dementia may hold clues for Alzheimer’s

    Immune cells in aging cat brains with amyloid beta destroy nerve endings, mimicking the progression of Alzheimer’s disease in humans.

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  2. Health & Medicine

    Scientists perform the first pig-to-human lung transplant

    The genetically modified lung remained viable for nine days, but the recipient’s immune responses need more research, scientists say.

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  3. Animals

    The mysterious, extinct ‘Fuegian dog’ was actually a semi-tame fox

    Historic European accounts long described the canids as domesticated dogs. A new study suggests that’s probably not true.

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  4. Seeing the world in new ways

    Editor in Chief Nancy Shute examines the exciting potential of the new Vera C.