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  1. Life

    Embryos kill off male tissue to become female

    Female embryos actively dismantle male reproductive tissue, a textbook-challenging study suggests.

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  2. Neuroscience

    How an itch hitches a ride to the brain

    Scientists have figured out how your brain registers the sensation of itch.

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  3. Astronomy

    Why are the loops in the sun’s atmosphere so neat and tidy?

    Observations during the total solar eclipse may explain why the sun’s atmosphere is so organized despite arising from a tangled magnetic field.

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  4. Health & Medicine

    A new tool could one day improve Lyme disease diagnosis

    There soon could be a way to differentiate between Lyme disease and a similar tick-associated illness.