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  1. Seeking the anomalies that lead to discoveries

    Editor in chief Nancy Shute discusses the booming online market for semaglutide, new findings on how early humans used sophisticated thinking and whether Spinosaurus could swim.

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  2. Readers weigh in on brainlike AI technology

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  3. Astronomy

    A gas clump in the Milky Way’s neighborhood might be a ‘dark galaxy’

    A blob of gas seen outside the Milky Way could be a type of starless, dark matter–dominated galaxy. Some scientists are skeptical.

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  4. Environment

    Fires in the Amazon forest may melt sea ice in Antarctica

    Satellite data reveal a link between the amount of black carbon in the atmosphere and rates of Antarctic sea ice loss in recent years.