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 ...

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

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

The link between social media use and poorer wellbeing is modest and shaped by our genetics, researchers in the Netherlands ...