100-year-old tortoise retires after his sex drive helps to save his species

A 100-year-old giant tortoise named Diego, who has been credited with helping to save his species from extinction, is set to return to the wild on the Galápagos Islands in Ecuador. Diego was among the male tortoises who were selected to take part in a breeding programme on Santa Cruz Island. Diego alone is believed to have fathered 800 tortoises.