Japan's oldest chimpanzee, Johnny, has died at the estimated age of 69, a zoo in western Japan said Tuesday.The African-born male chimp had seen his appetite diminish since around September, while he had been staying inside his sleeping chamber since 2017 due to age-related health issues, according to Oji Zoo in Kobe.A zookeeper found him dead on Tuesday morning, and Johnny is believed to have died of natural causes, said the city-run zoo.Since arriving at the zoo in 1955 at the estimated age of 5, Johnny produced a total of nine offspring with five partners. His first baby, born in 1963, i…READ FULL ARTICLE