RECIPE FOR DISASTER Despite the lab mouse’s much greater weight, chemistry gives this centipede the decisive advantage.
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).
H.-K. Liao et al/Cell 2017
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.