Twins Split by 'Science' Reunite

Three decades into a bizarre nature-versus-nurture experiment, Elyse Schein abruptly discovered she and a twin sister had been separated at birth and adopted into separate homes—all in the name of science. They eventually found each other in 2004, and now talked with CBS about their new memoir, Identical Strangers. 

The study probably aimed to shed light on the relationship between heredity and mental illness, but was cut short over ethical considerations. Schein and twin Paula Bernstein were among five sets of twins and one set of triplets involved. Though the girls shared an immediate intimacy, "it's taken 3 1/2 years for us to become sisters," Bernstein says. (More science stories.)