We saw the story over and over again: computer programmer Klára Dán von Neumann was a pioneer in weather forecasting. But when we talked to Thomas Haigh, a historian who studies Klári’s work, he said he’s found absolutely no evidence of this. How did this weather myth start? We set out to answer that question, and in the process, we asked this: Why is it so tempting to credit the wrong person, even when that false credit is given with the best of intentions?

Note: we’d like to acknowledge the operators of the ENIAC who ran the 1950 weather simulation, Homé McAllister and Clyde Hauff.