A female koala kept at a zoo in Hyogo Prefecture, western Japan, has been recognized by Guinness World Records as the world's oldest koala ever in captivity at age 24, the facility said Tuesday.Although she is a centenarian in human years, the koala named Midori is doing fine with no serious health problems, according to the Awaji Farm Park England Hill located on Awaji Island.The average longevity of a koala in captivity is about 16 years, and the previous record had been held by an animal in Australia that died in 2001 at age 23, according to the nature-themed park.Midori was born on Feb.…READ FULL ARTICLE