The Nile River, traditionally regarded as the longest in the world, has two major tributaries—the White Nile and the Blue Nile. The White Nile flows from Lake Victoria and is often credited as the source of the river. In 1858, during an expedition, John Speke "discovered" Lake Victoria and proposed that it was the source of the White Nile. However, this claim is debated. There is ongoing discussion about the exact source of the Nile, especially concerning the White Nile, as some argue that the true source might be further upstream in other lakes or springs. The debate centres around whether Lake Victoria should be considered the ultimate source, or if other lakes like Lake Tanganyika or springs in the mountains could be involved.