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  • A new regime for analyzing properties of topological materials

    A pair of studies demonstrates how two related metal alloys, cobalt monosilicide and rhodium monosilicide, can convert light into electric current efficiently thanks to their topology.
    a hand adjusting a lens on an optics table
    A pair of new studies demonstrates that two metal alloys are able convert light into electric current efficiently thanks to their topology. This fundamental research could provide a new approach for developing devices such as photo detectors and solar cells in the future. 

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  • OpenAI, DeepSeek, and Google vary widely in identifying hate speech
    Two people work on coding at computer.

    Image: Kindamorphic via Getty Images

    OpenAI, DeepSeek, and Google vary widely in identifying hate speech

    Neil Fasching and Yphtach Lelkes of the Annenberg School for Communication have found dramatic differences in how large language models classify hate speech, with especially large variations for language about certain demographic groups, raising concerns about bias and disproportionate harm.

    Sep 10, 2025