Lake Challa (image) University of Hawaii ‑ SOEST Share Print E-Mail Caption Lake Challa with Mt. Kilimanjaro in the background. The white speck on the lake is the sediment-core drilling platform. Credit Photo courtesy Stephan Opitz. Usage Restrictions For educational purposes only with appropriate credit given. 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.