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  1. Physics

    Here’s how scientists reached nuclear fusion ‘ignition’ for the first time

    The first fusion experiment to produce an energy excess required meticulous planning and also revealed a long-predicted heating phenomenon.

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  2. Neuroscience

    Ancient viruses helped speedy nerves evolve

    A retrovirus embedded in the DNA of some vertebrates helps turn on production of a protein needed to insulate nerve cells, aiding speedy thoughts.

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  3. Planetary Science

    NASA’s OSIRIS-REx nabbed over 120 grams of space rocks from asteroid Bennu

    After being stymied by two stuck screws, NASA finally accessed a trove of Bennu asteroid bits. Mission scientist Harold Connolly tells what’s next.

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  4. Agriculture

    Mixing up root microbes can boost tea’s flavor

    Inoculating tea plant roots with nitrogen-metabolizing bacteria enhances synthesis of theanine, an amino acid that gives tea its savoriness.