Have you heard about the “gender data gap”? I recently learned the phrase in an excerpt published in March in the Guardian from the book Invisible Women: Exposing Data Bias in a World Designed for Men, by Caroline Criado Perez (Abrams, 2019). “The gender data gap,” explains Criado Perez, “is both a cause and a consequence of the type of unthinking that conceives of humanity as almost exclusively male.”