Mitchondrial DNA and whole genome sequencing of the Chamorro people strongly support an ancestry from the Philippines. Genetic analysis of pre-"Latte" period skeletons in Guam also show that they do not have Australo-Melanesian ("Papuan") ancestry which rules out origins from the Bismarck Archipelago, New Guinea, or eastern Indonesia. The Lapita culture itself (the ancestral branch of the Polynesian migrations) is younger than the first settlement of the Marianas (the earliest Lapita artifacts are dated to around 1350 to 1300 BCE), indicating that they originated from separate migration voyages.