Add Yahoo as a preferred source to see more of our stories on Google. A century’s worth of twin data reveals that when schooling differs, identical twins’ IQs can diverge as much as unrelated people’s ...

From our DNA to the streets we grow up on, both nature and nurture weave together to shape our minds, health, and future. New research is revealing just how inseparable these forces are, from ...

Behavioral genetics explores how genes and environment intertwine to shape intelligence, personality, and behavior. From twin studies to genome-wide association research, scientists are uncovering how ...

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 ...