Mixed-race twins can look strikingly different – and while this is unusual, it makes perfect sense genetically.

Metastable epialleles may sound like complex science, but they help explain why identical animals can still look and act differently. For years, scientists asked why two mice with identical DNA could ...

A pair of identical twins got mistaken for mother and daughter by a stranger, all because of one tiny difference in their appearance. It’s not always easy to tell siblings apart or know who’s the ...

Discovered: The world's lightest material; babies understand more than we thought; even in the womb, identical twins aren't completely identical; superweeds are resistant to RoundUp. Germans break the ...

ILLINOIS -- Two gorgeous little tots are now social media stars for one very interesting reason. Bi-racial twins Kalani and Jerani are inspiring a lot of people after emerging from the womb with two ...