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  1. Life

    Immune system defects seem to contribute to obesity in mice

    Subtle defects affecting T cells altered the animals’ microbiome and fat absorption, providing hints of what might also be going on in people.

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  2. Health & Medicine

    50 years ago, a drug that crippled a generation found new life as a leprosy treatment

    In 1969, a drug that crippled a generation found new life as a treatment for leprosy.

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  3. Astronomy

    NASA’s Chandra X-ray telescope celebrates 20 years in space

    The U.S. space agency has released new images for the Chandra X-ray Observatory’s 20th birthday.

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  4. Particle Physics

    Dark matter particles won’t kill you.