Researchers say they have found fossil bones and teeth of a previously unknown human species in the northern Philippines. Scientists named the species Homo luzonensis after the island of Luzon, where the discovery was made. Researchers recently reported the finding in a study published in Nature. A team from the Philippines, France and Australia found the first fossil bones in 2007 in Callao Cave, in Cagayan province. Filipino archeologist Armand Salvador Mijares led the unearthing effort. He showed off the discovery at a news conference at the University of the Philippines, outside Manila. There were six pieces of bone, from the feet, hands and leg, belonging to at least three individuals. Seven teeth were also found. Another Filipino archaeologist, Eusebio Dizon, said the human remains were the oldest ever found in the Philippines.