The world knew him as Jungle Jack Hanna. After leading the Columbus Zoo and Aquarium for years and traveling the world, Hanna was first diagnosed with Alzheimer's in the fall of 2019. For the past ...

Jack Hanna at the National Wildlife Federation Voices for Wildlife 75th Anniversary Gala on June 15, 2011 in Beverly Hills, California. / Credit: John Shearer/WireImage via Getty Images ...

The family of “Jungle Jack” Hanna has revealed that the beloved former zookeeper is enduring an “advanced” stage of Alzheimer’s disease, where he doesn’t remember most of his own family.

Jack Hanna at the National Wildlife Federation Voices for Wildlife 75th Anniversary Gala on June 15, 2011 in Beverly Hills, California. John Shearer/WireImage via Getty Images ...

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, who hosted several television shows on animals and was a regular presence on late night talk shows, is suffering from Alzheimer’s disease, his family has revealed in an interview ...

Jack Hanna's family shared an update on the famed zookeeper and TV host's health. They said Hanna 'continues to decline' amid his battle with Alzheimer's disease.

Jungle Jack: Columbus Zoo's Jack Hanna plans to retire at age 73 The zoo has set up a green mailbox within its guest relations office at its front entrance where "notes of love and support to Jack ...

Wildlife expert Jack Hanna appears on the red carpet at the 2017 Points of Light Gala at the French Embassy on October 19, 2017 in Washington, DC. Shannon Finney/Getty Images ...