A map of the Nile River with political boundaries. (Photo: Rainer Lesniewski/Shutterstock) The Nile has three main tributaries: the White Nile, the Blue Nile, and the Atbara.

RIO DE JANEIRO — Guinness World Records, Britannica and the U.S. government agree: The longest river in the world is the mighty Nile — the “father of African rivers,” Britannica says. But ...

The ancient Egyptians may have had help building the pyramids after all – not from aliens but a long-lost river. Evidence of a previously uncharted branch of the Nile has been found snaking ...