Zookeeper Jack Hanna 'Continues To Decline' Amid Alzheimer's Battle: 'Wish We Had Good News' Jack Hanna, renowned for his leadership at the Columbus Zoo and Aquarium, continues to struggle with Alzheimer’s disease, as his family reveals his worsening condition.
Jack Hanna Receives Worrying Diagnosis After Retiring From Film & Entertainment industry Jack Hanna received a heartbreaking diagnosis one year after retiring from the entertainment industry.
