Mono-di twins share a placenta, which means they need extra monitoring to make sure they're getting enough nutrients and ...

Angelina Jolie has revealed why she decided to sell the pictures of her newborn twins Knox and Vivienne, now 16, in 2008 to ...

Angelina Jolie reveals the reason why she sold the first photos of her twins Vivienne and Knox for millions after they were ...

Find out everything you've always wanted to know about identical twins – from how they form to what makes them unique.