That’s where the sibling differences began between twins Stanley and Norman Kohler, basketball brothers who played for NC ...

All of which makes them valuable to study. Twins share everything from their in-utero environment and parents to birthdate and the classroom setting. One unusual case study involved two-and-a-half ...

Non-identical, or dizygotic, twins occur when two separate eggs are fertilised, each by a different sperm, and develop in the womb at the same time. These twins can be the same or different sexes ...

Against all odds, a mother in Hanoi gave birth to twins five weeks apart, with the older twin born prematurely at 26 weeks ...