There are more than 600 ethnic groups in the multicultural Indonesian archipelago, making it one of the most diverse countries in the world. The vast majority of these belong to the Austronesian peoples, whose ancestors migrated from Taiwan. They are primarily concentrated in western and central Indonesia (Asia). A significant minority are Melanesian peoples, descendants of some of the earliest the modern humans to inhabit Southeast Asia, mostly found in eastern Indonesia (Oceania). However, genetic studies show that ethnic groups in Java, Bali, and Lombok have significant traces of Austroasiatic ancestry, even though Austroasiatic languages have long been replaced by Austronesian languages in the region.