Oldest Animal Jonathan the Tortoise Is Going Strong at 183

A caloric increase is helping the oldest known living terrestrial animal in the world — a giant tortoise — reclaim his health and vigor, a veterinarian reports. At 183 years old, Jonathan, who resides on the tiny Atlantic island of St. Helena, is now eating like a king. Before the diet change, Jonathan's keratin beak was blunt and soft, making him an inefficient grazer, Dr. Joe Hollins, the veterinarian who cares for Jonathan, said in a 2012 report in the journal Veterinary Reco