Gender-bender stories have been around in the anime world for a long time, spanning several genres. These great shows make the most of the trope.

Females of some whale species have evolved to live drastically longer lives so they can care for their families, new research shows. Females of some whale species have evolved to live drastically ...

Hormones are natural substances produced in the body. They help to relay messages between cells and organs and affect many bodily functions. Everyone has what are considered “male” and “female” sex ...