One of the largest databases, “Request a Woman Scientist,” launched a year ago by the group 500 Women Scientists, contains the names of more than 8000 scientists from 133 countries. It’s open to anyone who self-identifies as a female scientist, says Elizabeth McCullagh, a postdoc at the University of Colorado Anschutz Medical Campus in Aurora and a co-founder of the database. “If you feel like you fit into that mold—whether you’re an undergrad, a graduate student, a postdoc, a professor, an independent scientist, if you think you’re a high schooler who could actually be involved—everyone is welcome.”