Greek philosopher Empedocles thought that different temperatures produced different sexes—while others were decidedly ...

A pair of Dalmatian pelicans have hatched a chick at Moscow ... For 30-40 days the egg is incubated mainly by the female, periodically replaced by the male. The newly born chick quickly gains weight ...

CHARLESTON — Both the West Virginia House of Delegates and the state Senate could be considering legislation to define “male” and “female” in State Code and to limit the rights of transgender ...

The memo defines terms such as sex − "a person's immutable biological classification as either male or female" − and female versus male. Kennedy's announcement comes a week after he was ...

The guidance states that it “recognizes there are only two sexes: male and female. HHS will use these definitions and promote policies acknowledging that women are biologically female and men ...

Yet a definition of biological sex put forth by U.S. President Donald Trump designates people as either male or female based solely on the size of the reproductive cells they make. Millions of ...

Silver angelfish enjoy living alongside other members of their species. ©iStock.com/TatianaMironenko The greatest differences between a male angelfish and a female ...

However, one lucky Dalmatian named Spotty recently enjoyed a luxurious journey in business class with its owner on a Singapore Airlines flight from Singapore to Tokyo. The Swiss Dalmatian is currently ...