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

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

It remains a mystery as to why there are vast differences in twin birth rates among the different regions of the developing world. Past research suggests that identical twins occur at a relatively ...

From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's "Twinnies" Paula and Brigette Powers, identical siblings have long inspired ...

An interview with Paula and Bridgette Powers – identical twins who witnessed their mother’s carjacking – recently went viral. The way they spoke and gestured in unison has captivated global audiences.

The mom was 20 weeks pregnant when she discovered that her twins, Graylen and Chaysen, had twin-to-twin transfusion syndrome.