It is possible, though perhaps unlikely, that among the remaining giant tortoises of the Galápagos Islands, there exists an old-timer that was a hatchling at the time of Charles Darwin's famous visit in 1835. Giant tortoises are the longest-lived of all vertebrates, averaging over 100 years. The oldest on record lived to be 152.They are also the world's largest tortoises, with some specimens exceeding 5 feet (1.5 meters) in length and reaching 550 pounds (250 kilograms). Courtesy National Geographic site
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