The history of the Philippines is known to have begun at least 709,000 years ago as suggested by the discovery of Pleistocene stone tools and butchered animal remains associated with hominin activity. "Homo luzonensis", a species of archaic humans, was present on the island of Luzon at least 67,000 years ago. The earliest known modern human was from the Tabon Caves in Palawan dating about 47,000 years. Negrito groups were the first inhabitants to settle in the prehistoric Philippines. By around 3000 BC, seafaring Austronesians reached northern Philippines migrating southward from Taiwan.