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 ...

Harsh parenting practices, not genetics, are linked to higher levels of behavior problems in children, according to a new study. Harsh parenting practices, not genetics, are linked to higher levels of ...

A study based on Finnish twins shows that reproductive history is associated, at the population level, with women's lifespan ...

Fascination with twins and what twin studies tell us about human nature is universal. There is no question that behavioral and medical science advances have happened largely because twins yield a ...

New research from University of Virginia psychologists found that “epigenetic clocks” – tools scientists use to estimate a person’s biological age – can predict cognitive decline. The study, which ...

The information gathered from the study of twins lays the groundwork for future genetic research, including the degree to which any aspects of life are determined by genetics, the location of specific ...