Resumen de The long and winding history of the Nile
The source of the Nile river remained a mystery to Europeans for thousands of years. Now another puzzle has finally been solved: the source of the river in deep time. The Nile's story has remained elusive because its most ancient deposits are buried beneath thousands of meters of Nile delta sediment, says Yani Najman at Lancaster University, UK. Only oil companies have drilled to such depths in the area and they don't like to share their findings. But after years of negotiation, BP Egypt provided samples from delta sediments dated to about 31 million years ago. These contain minerals matching those in rocks in the Ethiopian Highlands--the place where one major branch of the river, the Blue Nile, gets going.
