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Biomedicine

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centipede attacking lab mouse

RECIPE FOR DISASTER  Despite the lab mouse’s much greater weight, chemistry gives this centipede the decisive advantage.

mouse muscle fibers

PUMP IT UP  A new type of CRISPR/Cas9-based gene therapy turned on muscle-building genes in mice that have muscular dystrophy. Muscle fibers (magenta) from mice that got the therapy (right) were bigger than fibers from untreated animals (left).

graphic of an evidence hierarchy

Evidence hierarchies, one version shown, classify types of studies according to the strength of evidence they provide. But a recent paper challenges the assumptions behind these hierarchies.

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