https://www.inverse.com/article/38042-new-orangutan-species-third?utm_source=facebook&utm_medium=ScienceDump&utm_campaign=influencer The Batang Toru population is an independent lineage and there has been no genetic exchange between them and other orang-utans for at least 10-20,000 years. via 'Scientific Serendipity' Spurs Discovery of New Orangutan Species | Inverse.