The case should have been settled nearly five years ago. That is when an obscure postdoctoral fellow at M.I.T. first charged that a celebrated scientific article signed by some of the university's leading biologists -- including Nobel laureate David Baltimore -- was based on data that had been fudged. But rather than reopen the experiment (which involved introducing foreign genes into a mouse and observing the effect on the animal's own genes), the scientists, led by Baltimore, closed ranks. The junior researcher, Irish-born Margot O'Toole, was asked to give up her place in the lab. The senior scientist accused of misconduct,...
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