Gorge of the Nile (image) University of Utah Caption Rivaling North America's Grand Canyon of the Colorado River, the Gorge of the Nile shown here was formed as the Blue Nile River cut downward into the Ethiopian Plateau. University of Utah researchers study the timing of that erosion to learn more about the links between human evolution and changes in climate and vegetation caused by mountain-building in East Africa during the past 7 million years. Credit Royhan Gani Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.