A 2015 report that one of us co-authored found that one in three women science professors surveyed reported sexual harassment. There’s been a lot of talk about how to keep women in the STEM pipeline, but it fails to make a crucial connection: One reason the pipeline leaks is that women are harassed out of science. We recently spoke with a group of senior scientists who confirmed the prevalence of sexual harassment. Kim Barrett, the graduate dean at the University of California, San Diego, said she did not know of a single senior woman in gastroenterology, her subfield, who had not been sexually harassed. Margaret Leinen, of Scripps Institution of Oceanography at UC San Diego, described a conversation she once overheard between one male and five female scientists at a meeting where harassment was being discussed. “I don’t see what the fuss is about,” said the man. “I’ve never met anyone who has been sexually harassed.” The women just looked at each other. “Well, now you’ve met five,” they said.