Scientists have uncovered a previously unknown cluster of brain cells that may help explain differences in social behavior ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study ...

Most animals carry out sexual reproduction. Sexual reproduction involves the joining of two sex cells (gametes) – the sperm (male gamete) and the egg/ovum (female gamete).

Get ready for your aha moment: Every weekday, host Meghna Chakrabarti pierces your news bubble to expose the whole story. Getting answers to the questions that need to be asked, examining our history ...