We humans love putting things in boxes. Assigning simple categories makes us feel comfortable – but all too often, biology comes along to ruin the fun. Sex is often described in simplistic , binary terms: male and female. The reality, however, contains a lot more shades of gray , and now a new study is showing that even when it comes to the organs in our bodies, binary sex categories are unhelpful . The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

According to the new paper, many organs in the human body are a mishmash of male and female characteristics. Some are more distinctly sex-specific , while some barely differ between the sexes. All in all, the authors conclude, “adult individuals are composed of a mosaic spectrum of sex

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