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 ...

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

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 ...

It’s an age-old question: is nature or nurture more responsible for how we turn out in life? Scientists have long believed that some combination of our genes and environment – our diets, lifestyles, ...