Robert Pershing Wadlow lived in Alton, Illinois, and was known as the Alton Giant and the Gentle Giant.
He sadly passed away in 1940 due to his tallness. It made it difficult for him to walk and he wouldn't use a wheelchair. He developed complications during or from a surgery and he passed away peacefully in his sleep.
Unfortunately medicine wasn't as advanced back then as it is now, or Mr. Wadlow would've probably lived another 80 growing years. It was said that his growing condition showed no size of slowing down. His pituitary gland created so much human growth hormone that no one really knows how tall Robert Wadlow could've been! One can only imagine. Take a look at his pictures. He's huge, and apparently, reports state that he was a really cool and amazing guy!