Nearly complete genetic analysis out today confirms that perhaps 4-6 percent of the DNA possessed by people today in New Guinea spring from a vanished family of archaic humans located in Siberia's Denisova Cave. "Such a low shared percentage hardly proves an important ancestral tie between Denisovans and contemporary Melanesians (the modern inhabitants of New Guinea)," says biological anthropologist Jonathan Friedlaender of Temple, an expert on Melanesian genetics. "It suggests to me that other very ancient populations yet unstudied or unknown may have played more important roles in our ancestry."