Composite image of tree rings and sun (IMAGE) University of Queensland Caption A composite image showing a tree ring and flames - UQ researchers used tree ring data to model the global carbon cycle to challenge the common theory about Miyake Events. Credit The University of Queensland Usage Restrictions N/A 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.