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

Nick Cannon recently showed off his bond with his and Mariah Carey’s 14-year-old twins Monroe and Moroccan—and the teenagers ...

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

There’s both fact and fiction to the rumors that twins run in families and tend to skip a generation. Here’s how heredity impacts your odds of conceiving twins.

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

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