When we think of identical twins, we often imagine mirror images — same face, same smile and perhaps even the same talents. But what surprises many is that these genetic carbon copies can have ...

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 ...

If you’ve got triplets on the way (or know someone who does), you might be wondering: Will all three look exactly alike, or will each baby be different? The answer is a little complicated. Unlike with ...