From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's ...

DNA analysis used to identify remains of Air India flight 171 victims, highlighting importance of DNA fingerprinting in ...

The twins occasionally used their identical appearance for harmless mischief. When Charlie and Thomas were born, I jokingly called them "Copy" and "Paste" in the hospital — my first official dad ...

A study of twins reveals two gut bacteria linked to multiple sclerosis, offering new targets for future treatments.

There are no good numbers for exactly how many identical twins there are in the world, just an oft-trotted out statistic that 32 out of every 1,000 people is a twin. Even as multiple birth numbers ...

A large study of identical twins shows that people’s genes affect their sensitivity to life experiences, which in turn makes ...

There's another, extremely rare type of twins called semi-identical (sesquiszygous) twins, who share more than half but less ...

A study involving more than 1,000 twins suggests that the environment during very early life plays a more important role than ...

Lady Amelia and Lady Eliza Spencer are the guests everyone wants at their party this summer. Julia Llewellyn Smith meets them ...

DNA evidence links Rex Heuermann, the alleged Long Island serial killer, to six of the seven murders he’s charged with. Why may it not be admitted in court?