When our identical twin boys were born, we deliberately treated them as individuals. Even their closest friends struggled to tell them apart despite our efforts to differentiate them. The twins ...

A California couple got the surprise of their lives when they came in for an ultrasound to make sure everything was okay.

Sarah and Aimee Charlwood are identical twins who didn't spend a day apart until they were 16.Courtesy of Sarah Charlwood Sarah and Aimee Charlwood from Brisbane, Australia, are identical twins. They ...

An identical twin has revealed that there is something that sets her apart from her sister: her weight. Since hitting puberty, Ashley has generally weighed 20 to 30lbs more than her sister Kelly ...

For more than a century, scientists have debated whether intelligence is mostly a product of nature or nurture. Identical twins—those born with the same genetic blueprint—have long been the perfect ...

From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's "Twinnies" Paula and Brigette Powers, identical siblings have long inspired ...