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We summarize the week's scientific breakthroughs every Thursday.

  1. Life

    Scientists find way to break through bad bacteria’s defenses

    Enzymes can break down bacterial biofilm’s sugary walls.

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  2. Health & Medicine

    CDC tracking 279 U.S. pregnant women with possible Zika infections

    The number of U.S. pregnant women with evidence of Zika infection has climbed to nearly 300, and includes both women with and without symptoms.

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  3. Genetics

    Risk identified in procedure for ‘three-parent babies’

    Resurgent mitochondria could spell trouble for disease therapy.

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  4. Neuroscience

    Wiping out gut bacteria impairs brain

    Antibiotics that wiped out gut bacteria curbed brain cell production in mice, a new study finds.

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  5. Genetics

    Some Stone Age humans returned to Africa

    DNA from an ancient woman suggests some humans trekked back to Africa.

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  6. Genetics

    Some Stone Age humans ventured back to Africa

    DNA from an ancient woman suggests some humans trekked back to Africa.

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  7. Health & Medicine

    Math offers new view of brain and its disorders

    Editor in chief Eva Emerson discusses new insights into the brain's role in mental illness, sleep, and ancient rituals.

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  8. Health & Medicine

    Zika, psychobiotics and more in reader feedback

    Readers respond to the April 2, 2016, issue of Science News with thoughts on Zika virus, planetary science, microbes in mental health and more.

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  9. Health & Medicine

    With easy e-cig access, teen vaping soars

    The vast majority of U.S. states ban sales or distribution of e-cigarette products to minors. Still, it’s no sweat for teens to buy them online.

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  10. Health & Medicine

    Scientists wrestle with possibility of second Zika-spreading mosquito

    It’s hard to say yet whether Asian tiger mosquitoes will worsen the ongoing Zika outbreak in the Americas.

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  11. Genetics

    Faulty gene can turn colds deadly for babies, toddlers

    Children with a faulty virus-sensing gene may land in intensive care after a cold.

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  12. Health & Medicine

    Here are a few more things for the childproofing list

    Some seemingly safe objects may be particularly dangerous for little kids.

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