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 ...

Identical twins are pretty fascinating – and if you have a set, you're probably used to people stopping you to comment or ask questions. They're rare, special, and even a bit confusing. In the ...

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. The findings suggest that variations in IQ may be less about genetics and ...

Commentary: People, by nature, vary. We may be different ages or genders and come from many cultures, ethnic backgrounds, and ...