Wildebeest at a watering hole (IMAGE) University of Arizona Caption Extinct mammals, similar to these wildebeest photographed at a watering hole in Serengeti National Park in northern Tanzania, once roamed the African continent and left behind a plethora of fossils. Credit Andrew Cohen/University of Arizona Usage Restrictions This visual may only be used for the purpose of posting and/or reporting of this news release. Credit information must be provided as indicated. License Original content 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.