The Aldabra giant tortoise, or simply giant tortoise, is one of the world’s largest tortoises. Historically, these tortoises lived on many western Indian Ocean islands, including Madagascar, and the fossil record shows that giant tortoises once lived on every continent and many islands except Antarctica. Many of these Indian Ocean species were thought to have been driven to extinction by European sailors, and by 1840 they were apparently all extinct, with one exception: the Aldabran giant tortoise.
More info: onlinelibrary.wiley.com