The entertainment world is mourning the loss of Alice and Ellen Kessler, the German twin performers whose elegance, precision, and unmistakable synchronicity made them international stars. The sisters, widely known as the Kessler Twins, died together on Monday at the age of 89 through assisted suicide—a decision they had openly contemplated in recent years. The German Society for Humane Dying confirmed their deaths on Tuesday, stating the twins had been “members of the organization for over a year,” with consultations held by both a doctor and a lawyer to ensure they were making a clear, consistent, and voluntary choice. The…