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.

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

A new analysis of studies spanning the last century finds that differences in schooling appear to explain a large portion of ...

Seven years ago, I took a bet with Charles Murray about whether we’d basically understand the genetics of intelligence by now ...

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

"It's awesome and they are so [cute] together." — -- In a happy coincidence, a pair of identical twins have given birth just 20 hours apart in the same hospital. Becky Pistone and her sister, ...