California twin girls conjoined by their heads were successfully separated at UC Davis Medical Center in Sacramento this weekend. Nine-month-old Abigail and Micaela Bachinskiy underwent a marathon 24-hour surgery. The girls are joined by the skull, soft tissues and brain — known as craniopagus. “It’s a very, very rare anomaly,” UC Davis Children’s Hospital Pediatric Neurosurgeon Dr. Michael Edwards said. “There are very few children