Biological sex is usually described in simple binary terms: male or female. This works well for germ cells (sperm versus eggs), but for other body organs it is of little help. A new study by the Max ...

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 ...

Scientists have discovered how parts of organs grow differently when body size changes. Scientists at the University of Sussex have discovered how parts of organs grow differently when body size ...

• Only sexual organs show clear separation: In all other organs, male and female gene activity patterns overlap. • Human differences are weaker: Compared to mice, the differences are smaller and ...