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  • Artificial cells can deliver molecules better than the real thing

    With an onion-like structure, the artificial cells developed by researchers at Penn appear more stable and better equipped to carry cargo than their natural and commercial counterparts.
    Far left is chemical with phenol rings and long carbon chains, underneath are red circles showing the onion-like structure. Center panel shows a protein structure with a fluorescent tag marked by a green star, labeled with benzyl-guanine, SNAP protein, DNA Aptamer, FAM dye, His-tag, NI2+, and RH-NTA. Last figure shows the same protein in the center replicated many times to form a circular structure.
    Chemical components of the dendrimer (left), which self-assemble into an onion-like artificial cell (in red). A detailed depiction of the additional proteins and DNA cargos (center) that are conjugated to artificial cell (right). (Image courtesy: Paola Torre)

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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