Lonesome George is the rarest creature in the world. He is the last known individual of the Pinta Island Tortoise, subspecies Geochelone nigra abingdonii, one of 13 subspecies of Galápagos tortoise native to the Galápagos Islands.
George was first seen on the island of Pinta on 1 December 1971 by American snail biologist Joseph Vagvolgyi and subsequently tracked down by goat hunters in March 1972. It's thought he was named after the character played by American actor George Gobel. Relocated to the Charles Darwin Research Station, George was penned with two females of a different subspecies, Geochelone nigra becki from Wolf Island, in the hope that his genotype would be retained in the resulting progeny.
Unfortunately, these attempts have not been successful to date.