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It's long been known that the ranks of Wikipedia editors are mainly male. But now illustrator Santiago Ortiz has created an interactive looking at the proportion of edits on individual Wikipedia articles made by men vs. women, and it turns out that the gender divide on "the free encyclopedia that anyone can edit" is even starker than we thought.

For this chart, the X-axis represents the number of male editors and the Y-axis represents the number of female editors. Each dot is a Wikipedia article, and the line down the middle shows the average 12.9 male editors to 1 female editor per article. The fact that the dots line the bottom means there are far more male editors for each female editor on individual articles.

Ortiz used a dataset culled by Wiki Trip, an independent site that visualizes Wikipedia data from Toolserver, a Wikimedia Foundation supported software platform. Only registered users who said a gender were included in the data, so users who abstained were not included. Theoretically, women could be less willing to volunteer their gender data, which would mean that the 12.9-to-1 ratio could be lower. But by comparing to the activity of those who did specify a gender, it's clear that the female editors who have registered are not contributing nearly as much as their male counterparts.