After conception, if a fertilised egg splits in two, it produces identical twins. They can share the same sac in the womb, rapidly growing, entwined with each other. Their DNA is almost identical, so similar in fact, it was, only until recently, impossible to tell them apart. When they are raised, they encounter many of life's milestones together; they go to the same school, know the same people, and often experience the same things. When they are grown, the twins might go their separate ways, but the intense bond they formed when they were young is still strong when they meet again. This is the case of Ursula and Sabina Eriksson…