Low iron levels can flip the genetic switch on a mouse's sex during development, causing XY embryos to grow female features.

Police are investigating two men suspected of switching the men’s and women’s signs at a public bathhouse, causing a woman to enter men's area.

Eight days’ hiking lets you imagine the weird and wonderful lives of those who once lived at the Roman Empire’s northern ...

Research led by the Max Planck Institute for Empirical Aesthetics has confirmed that female faces are rated as more ...

J. Edward Les is a Calgary pediatrician, a senior fellow with the Aristotle Foundation for Public Policy ,  and co-author of ...

Two-Spirit, Māhūs, and X-jendā are just a small example of how a “third” gender has been referred to across the world ...