Jack Hanna, 74, is suffering from what is believed to be Alzheimer’s disease, according to his family. The beloved animal expert and Director Emeritus of the Columbus Zoo and Aquarium’s daughters shared the devastating news on Wednesday in an emotional letter shared to social media. “Today, we reach out to share some personal Hanna Family news,” wrote Kathaleen, Suzanne and Julie. “Doctors have diagnosed our dad, Jack Hanna, with dementia now believed to be Alzheimer’s disease.” RELATED: Engelbert Humperdinck Reveals Wife Patricia Has Passed Away From COVID-19 Following ‘Brave’ Alzheimer’s Battle They continued, “His condition has progressed much faster in the last few months than any of us could have anticipated.
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