evidence: The Democratic Republic of the Congo is named after the Congo River, which flows through the country. The Congo River is the world's deepest river and the world's third-largest river by discharge. The Comité d'études du haut Congo ("Committee for the Study of the Upper Congo"), established by King Leopold II of Belgium in 1876, and the International Association of the Congo, established by him in 1879, were also named after the river.[18] [...] The geographical area now known as the Democratic Republic of the Congo was populated as early as 90,000 years ago, as shown by the 1988 discovery of the Semliki harpoon at Katanda, one of the oldest barbed harpoons ever found, believed to have been used to catch giant river catfish.[33][34]