A rare species of giant tortoise, feared extinct for more than 100 years, was sighted on the Galápagos island of Fernandina Sunday, the Ecuadorian government announced. The tortoise, an adult female of the species Chelonoidis phantasticus, was found during an investigation by the Galápagos National Park and the U.S. environmental group Galapagos Conservancy, The Associated Press reported.