(IMAGE) Hong Kong University of Science and Technology Caption The figure shows a strong homogeneity in the distribution and formation pathways of OOMs across China's megacities including Hong Kong, Beijing, Nanjing, and Shanghai. Credit HKUST 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.