Like much of the internet, PubPeer is the sort of place where you might want to be anonymous. There, under randomly assigned taxonomic names like Actinopolyspora biskrensis (a bacterium) and Hoya camphorifolia (a flowering plant), “sleuths” meticulously document mistakes in the scientific literature. Though they write about all sorts of errors, from bungled statistics to nonsensical methodology, their collective expertise is in manipulated images: clouds of protein that show suspiciously crisp edges, or identical arrangements of cells in two supposedly distinct experiments. Sometimes, these irregularities mean nothing more than that a researcher tried to beautify a figure before submitting it to a journal. But they
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