Laurie Clarke delves into the devilishly complex forces that shape our personalities – and the new research revealing ever ...

(Karen Moskowitz/The Image Bank/Getty Images) It's entirely normal and healthy to be a little self-involved from time to time ...

Researchers are focusing on the differences between identical twins, rather than the similarities, in an attempt to rethink the nature versus nurture debate, and unlock medical mysteries including ...

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 ...

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 ...

Study helps explain why identical animals can still look and act differently. (CREDIT: Shutterstock) Since then, researchers have asked how many metastable epialleles — or MEs — exist in mice. Could ...