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Some of the disparity in the risk from BRCA mutations is generational. One repeated finding is that, by age 50, mutation carriers born in the early twentieth century seem to have a lower risk of cancer than those born later3. The pattern suggests that outside influences interact with genes, and that something in the environment has changed in an unfavourable way. If researchers can figure out what those influences ar

Although professionals may bemoan their long work hours and high-pressure careers, really, there’s stress, and then there’s Stress with a capital “S.” The former can be considered a manageable if unpleasant part of life; in the right amount, it may even strengthen one’s mettle. The latter kills. What’s the difference? Scientists have settled on an oddly subjective explanation: the more helpless one feels when facing