Jack Hanna in 2017. Shannon Finney / Getty images wrote, their father will retire, after retirement, from his role in Columbus Zoo after retirement, he worked for 42 years.  They said that Hannah, 74 people were considered Alzheimer's disease, and his condition progressed faster in the past few months. "We can expect in the past few months."
 "The enthusiasm for wildlife protection and education has always been at the heart of our father and everything he has done with many people. He has already spent his life wildlife because he has always thought that people have been thinking to see and Experience animals are more important to achieve more influential protection efforts, "his daughter said. "Although Dad no longer can travel and work in the same way, we know that his contagious enthusiasm has touched many souls and will continue to be his legacy."
In addition to his work in Columbus Zoo, Hannah regularly produced media appearance, participated in some natural television programs, including "animal adventure," entered the wild, "and" wild wild Countdown to "
 Ohio Governor Mike Dewei said in the tweet, in the diagnosis of Hannah, he" very sad ".
" Over the years, [My wife] Fran and He said that I have the opportunity to bring the children and the grandson to the Columbus Zoo and the aquarium and wild, "he said." When we were there, we were very lucky to experience his enthusiasm for animals and nature.