Alison Spooner has had two sets of black and white twins. Spooner, who is white, and Dean Durrant, who is black, had twin girls in 2001. One of the girls was white, the other black. Seven years later, they had another set of twins. Again, one girl was white, the other black. Doctors have said that the odds of a family having a second set of black and white twins in two in a million.The Sun: Twincredibles (December 31, 2008)

Children receive one set of genes from each parent. When separate eggs are fertilized with separate sperm, as is the case with fraternal twins, they will have different characteristics. One of the characteristics that can vary is skin color.The Sun: Twincredibles (December 31, 2008)

"I was shocked when I first found out I was pregnant with twins again — but I never thought for one second they would turn out the same as last time. After the babies were born they weren’t breathing properly, so they were taken to a special care unit. It wasn’t until about five days after they were born that we saw them side by side for the first time. And when they were together it was clear that one was darker than the other. It was unbelievable."The Sun: Twincredibles (December 31, 2008)

• HealthOffbeat News

• CBS News: Couple Gives Birth To Rare Twins, Again (January 2, 2009)

• KOLD (Tucson, AZ): British Twins Make Medical History (January 2, 2009)

• The Sun: Twincredibles (December 31, 2008)

• Telegraph: The Genetic Miracle Behind the Double Mixed-Race Twins (December 31, 2008)

• Times of the Internet: Couple Has Twins of a Different Color (December 31, 2008)

• YouTube Video: Baby Twins of Two Colors: One Is White, the Other Black !