East African Rift System (image) GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre Share Print E-Mail Caption The East African Rift System is currently the largest in the world. Yet, the global rift network 130 and 50 million years ago was more than 5 times longer. Credit Brune, Nasa WorldWind Usage Restrictions None Share Print E-Mail 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.