Additional DNA analysis has taken research into new directions, as more human species have been discovered since the late 20th century. Based on his genetic studies of the Denisova hominin, an ancient human species discovered in 2010, Svante Pääbo claims that ancient human ancestors of the Melanesians interbred in Asia with these humans. He has found that people of New Guinea share 4–6% of their genome with the Denisovans, indicating this exchange. The Denisovans are considered cousin to the Neanderthals; both groups are now understood to have migrated out of Africa, with the Neanderthals going into Europe, and the Denisovans heading east about 400,000 years ago. This is based on genetic evidence from a fossil found in Siberia. The evidence from Melanesia suggests their territory extended into south Asia, where ancestors of the Melanesians developed.