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  1. Physics

    Readers inquire about a Neptune-sized moon, nuclear pasta and more

    Readers had questions about a Neptune-sized moon, nuclear pasta and the search for extraterrestrial life.

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  2. Health & Medicine

    In a first, a woman with a uterus transplanted from a deceased donor gives birth

    After receiving a uterus from a deceased donor, a woman gave birth to a healthy girl in December of 2017.

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  3. Physics

    Scientists’ collection of gravitational waves just got a lot bigger

    The biggest black hole merger yet seen created one set of the spacetime ripples.

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  4. Animals

    Rebel honeybee workers lay eggs when their queen is away

    A honeybee queen’s absence in the colony triggers some workers to turn queen-like and lay eggs, sometimes in other colonies.