Discovering a climate danger (IMAGE) University of Delaware Caption Scientists collect samples on the ice in the Arctic. Credit Photos courtesy of Zhangxian Ouyang, Wei-Jun Cai and Liza Wright-Fairbanks/ University of Delaware Usage Restrictions Must credit Zhangxian Ouyang, Wei-Jun Cai and Liza Wright-Fairbanks/ University of Delaware 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.