Shungite (IMAGE) University of Alberta Caption This two-billion-year-old shungite records evidence for balmy, oxygen-rich conditions on the early Earth. Photo courtesy of K. Paiste. Credit K. Paiste. Usage Restrictions with credit License Licensed 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.