There’s a common assumption that intelligence is largely determined by genetics. After all, previously published studies ...

For more than a century, scientists have debated whether intelligence is mostly a product of nature or nurture. Identical ...

Identical twins who were raised apart may have IQ differences similar to those of total strangers, according to new research.

Sarah and Aimee Charlwood are identical twins. They didn't spend a day apart until they were 16. They share the same ...

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 ...

The mom was 20 weeks pregnant when she discovered that her twins, Graylen and Chaysen, had twin-to-twin transfusion syndrome.

NEW YORK CITY -- A pair of identical twin sisters are mothers, wives, and yoga enthusiasts - they may live miles apart but together, they're unstoppable and taking social media by storm. Cristen ...

After believing that her daughters were fraternal twins for so long, a mom was stunned when a genetic test revealed otherwise. Not long after Tamara Vanderent, 30, discovered that she was expecting ...

These folks are giving a new meaning to the term "twin flame." The couples first met at the Twins Day Festival in Ohio, and according to the sisters, they knew it was love within 15 minutes of ...