The recent discovery of the carcasses and bones of carcass remains in Rizal, Kalinga is proof of ancient hominini in the country 709,000 years ago. [6] Meanwhile, according to recorded human remains in the country, people could have been rebuilt in the Philippines thousands of years ago. It is thought that the remains of the Callao People discovered in the Cave of Callao in Cagayan are the oldest human remains in the Philippines dating back 67,000 years. It is older than the earliest discovered remains of the Palawan Yearbook about 26,500 years ago. Negrito or Ita crossed the ancient land bridge, which is considered to be the first settler in the Philippines. Eventually, they set foot in the jungle of the islands. Currently, during the second millennium, other immigrants from the Malay peninsula, Indonesian archipelago, Indo-Indigenous peoples and Taiwanese have also settled in the Philippines.
There are already several theories regarding the origin of ancient Filipinos. F. Landa Jocano's theory is that the Filipino ancestry has evolved locally. Wilhelm Solheim's theory of "Origin of the Islands" suggests that the arrival of the people to the archipelago occurred through trade networks originating in Sundaland between 48,000 and 5,000 BK and not by extensive migration. Meanwhile, the "Growth of Australians" theory explains that the Far-Poles from Taiwan began migrating to the Philippines in 4,000 BK, contrary to earlier arrivals.