The world's oldest living land animal is named Jonathan. A 184-year-old Seychelles giant tortoise, he originally hails from the Aldabra Atoll in the Indian Ocean, though he's spent the past 134 years on the island of St Helena in the south Atlantic. Here he is in 1902, posing alongside a guard and prisoner of the Boer War. 

Jonathan at 70 years old. So young and full of life! 

Today, Jonathan lives a pampered and stately life. Each morning, he receives a salad of lettuce, carrots, beans, and apples from his personal island veterinarian, Joe Hollis. In preparation for the arrival of royal visitors, he's just received his first ever bath, which makes for fascinating viewing:

But despite his maturity and esteem, the genetic marvel's twilight years are still well in front of him. Giant tortoises may live up to 250 years, and so far, Jonathan is showing no signs of slowing down. “He loves people, actually," according to Hollis. "I mean, this is an animal who’s lived across three centuries.