Top of the World (IMAGE) NASA/Goddard Space Flight Center Caption A predictable pattern of winds in the stratosphere recently changed in a way scientists had not seen in more than 60 years of record-keeping. Credit NASA Usage Restrictions None 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.