A Chimpanzee named Smoke has died at the St. Louis Zoo at the age of 43.
He sired Cinder, a hairless chimp who died unexpectedly two years ago.
Primate curator Ingrid Porton says, “He had a full and rewarding social life. He was a kind and sometimes very goofy father to his biological and foster kids. It was not unusual to see Smoke do a head stand to clearly communicate his play intentions to shy youngsters.”