Living with an identical twin is an experience you can only be born into. Twins often have unique relationships, but even by ...

Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins ...

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 ...

The 61-year-old sisters both got deep plane facelifts on the same day by the same Florida-based plastic surgeon Here they share a candid look at the process — from what sparked their decision to go ...

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 ...