On July 11th, Florence Addo-Gerth, a black woman from Ghana, gave birth to twin boys with strikingly different features: Ryan has blue eyes and light skin, like his father Stephan Gerth, while Leo has brown eyes and dark skin, like his mother.

Although this is an extremely rare occurence, Leo and Ryan are not the first set of fraternal twins to have different skin colors. And it doesn't only happen to twins: it's possible for any baby of biracial parents to inherit the genetic coding of only one skin color.

Although Gerth and Addo-Gerth anticipate the incredulous stares they'll get when they introduce Ryan and Leo as twins, for now they are simply overjoyed to have two healthy baby boys.